From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libjava/classpath/java/io/BufferedInputStream.java | 379 ++++ .../classpath/java/io/BufferedOutputStream.java | 191 ++ libjava/classpath/java/io/BufferedReader.java | 575 ++++++ libjava/classpath/java/io/BufferedWriter.java | 262 +++ .../classpath/java/io/ByteArrayInputStream.java | 251 +++ .../classpath/java/io/ByteArrayOutputStream.java | 284 +++ libjava/classpath/java/io/CharArrayReader.java | 305 +++ libjava/classpath/java/io/CharArrayWriter.java | 352 ++++ .../classpath/java/io/CharConversionException.java | 73 + libjava/classpath/java/io/Closeable.java | 63 + libjava/classpath/java/io/DataInput.java | 456 +++++ libjava/classpath/java/io/DataInputStream.java | 785 +++++++ libjava/classpath/java/io/DataOutput.java | 325 +++ libjava/classpath/java/io/DataOutputStream.java | 539 +++++ libjava/classpath/java/io/DeleteFileHelper.java | 106 + libjava/classpath/java/io/EOFException.java | 76 + libjava/classpath/java/io/Externalizable.java | 107 + libjava/classpath/java/io/File.java | 1605 +++++++++++++++ libjava/classpath/java/io/FileDescriptor.java | 140 ++ libjava/classpath/java/io/FileFilter.java | 65 + libjava/classpath/java/io/FileInputStream.java | 322 +++ .../classpath/java/io/FileNotFoundException.java | 73 + libjava/classpath/java/io/FileOutputStream.java | 309 +++ libjava/classpath/java/io/FilePermission.java | 293 +++ libjava/classpath/java/io/FileReader.java | 91 + libjava/classpath/java/io/FileWriter.java | 137 ++ libjava/classpath/java/io/FilenameFilter.java | 75 + libjava/classpath/java/io/FilterInputStream.java | 203 ++ libjava/classpath/java/io/FilterOutputStream.java | 149 ++ libjava/classpath/java/io/FilterReader.java | 184 ++ libjava/classpath/java/io/FilterWriter.java | 146 ++ libjava/classpath/java/io/Flushable.java | 62 + libjava/classpath/java/io/IOException.java | 74 + libjava/classpath/java/io/InputStream.java | 270 +++ libjava/classpath/java/io/InputStreamReader.java | 509 +++++ .../classpath/java/io/InterruptedIOException.java | 94 + .../classpath/java/io/InvalidClassException.java | 110 + .../classpath/java/io/InvalidObjectException.java | 66 + .../classpath/java/io/LineNumberInputStream.java | 315 +++ libjava/classpath/java/io/LineNumberReader.java | 416 ++++ libjava/classpath/java/io/NotActiveException.java | 72 + .../java/io/NotSerializableException.java | 74 + libjava/classpath/java/io/ObjectInput.java | 140 ++ libjava/classpath/java/io/ObjectInputStream.java | 2142 ++++++++++++++++++++ .../classpath/java/io/ObjectInputValidation.java | 67 + libjava/classpath/java/io/ObjectOutput.java | 110 + libjava/classpath/java/io/ObjectOutputStream.java | 1490 ++++++++++++++ libjava/classpath/java/io/ObjectStreamClass.java | 1161 +++++++++++ .../classpath/java/io/ObjectStreamConstants.java | 226 +++ .../classpath/java/io/ObjectStreamException.java | 74 + libjava/classpath/java/io/ObjectStreamField.java | 401 ++++ .../classpath/java/io/OptionalDataException.java | 91 + libjava/classpath/java/io/OutputStream.java | 140 ++ libjava/classpath/java/io/OutputStreamWriter.java | 429 ++++ libjava/classpath/java/io/PipedInputStream.java | 413 ++++ libjava/classpath/java/io/PipedOutputStream.java | 181 ++ libjava/classpath/java/io/PipedReader.java | 364 ++++ libjava/classpath/java/io/PipedWriter.java | 182 ++ libjava/classpath/java/io/PrintStream.java | 675 ++++++ libjava/classpath/java/io/PrintWriter.java | 689 +++++++ libjava/classpath/java/io/PushbackInputStream.java | 335 +++ libjava/classpath/java/io/PushbackReader.java | 383 ++++ libjava/classpath/java/io/RandomAccessFile.java | 1049 ++++++++++ libjava/classpath/java/io/Reader.java | 286 +++ libjava/classpath/java/io/SequenceInputStream.java | 223 ++ libjava/classpath/java/io/Serializable.java | 54 + .../classpath/java/io/SerializablePermission.java | 112 + .../java/io/StreamCorruptedException.java | 73 + libjava/classpath/java/io/StreamTokenizer.java | 718 +++++++ .../classpath/java/io/StringBufferInputStream.java | 187 ++ libjava/classpath/java/io/StringReader.java | 208 ++ libjava/classpath/java/io/StringWriter.java | 212 ++ libjava/classpath/java/io/SyncFailedException.java | 66 + .../classpath/java/io/UTFDataFormatException.java | 74 + .../java/io/UnsupportedEncodingException.java | 73 + .../classpath/java/io/WriteAbortedException.java | 109 + libjava/classpath/java/io/Writer.java | 211 ++ libjava/classpath/java/io/package.html | 46 + 78 files changed, 24377 insertions(+) create mode 100644 libjava/classpath/java/io/BufferedInputStream.java create mode 100644 libjava/classpath/java/io/BufferedOutputStream.java create mode 100644 libjava/classpath/java/io/BufferedReader.java create mode 100644 libjava/classpath/java/io/BufferedWriter.java create mode 100644 libjava/classpath/java/io/ByteArrayInputStream.java create mode 100644 libjava/classpath/java/io/ByteArrayOutputStream.java create mode 100644 libjava/classpath/java/io/CharArrayReader.java create mode 100644 libjava/classpath/java/io/CharArrayWriter.java create mode 100644 libjava/classpath/java/io/CharConversionException.java create mode 100644 libjava/classpath/java/io/Closeable.java create mode 100644 libjava/classpath/java/io/DataInput.java create mode 100644 libjava/classpath/java/io/DataInputStream.java create mode 100644 libjava/classpath/java/io/DataOutput.java create mode 100644 libjava/classpath/java/io/DataOutputStream.java create mode 100644 libjava/classpath/java/io/DeleteFileHelper.java create mode 100644 libjava/classpath/java/io/EOFException.java create mode 100644 libjava/classpath/java/io/Externalizable.java create mode 100644 libjava/classpath/java/io/File.java create mode 100644 libjava/classpath/java/io/FileDescriptor.java create mode 100644 libjava/classpath/java/io/FileFilter.java create mode 100644 libjava/classpath/java/io/FileInputStream.java create mode 100644 libjava/classpath/java/io/FileNotFoundException.java create mode 100644 libjava/classpath/java/io/FileOutputStream.java create mode 100644 libjava/classpath/java/io/FilePermission.java create mode 100644 libjava/classpath/java/io/FileReader.java create mode 100644 libjava/classpath/java/io/FileWriter.java create mode 100644 libjava/classpath/java/io/FilenameFilter.java create mode 100644 libjava/classpath/java/io/FilterInputStream.java create mode 100644 libjava/classpath/java/io/FilterOutputStream.java create mode 100644 libjava/classpath/java/io/FilterReader.java create mode 100644 libjava/classpath/java/io/FilterWriter.java create mode 100644 libjava/classpath/java/io/Flushable.java create mode 100644 libjava/classpath/java/io/IOException.java create mode 100644 libjava/classpath/java/io/InputStream.java create mode 100644 libjava/classpath/java/io/InputStreamReader.java create mode 100644 libjava/classpath/java/io/InterruptedIOException.java create mode 100644 libjava/classpath/java/io/InvalidClassException.java create mode 100644 libjava/classpath/java/io/InvalidObjectException.java create mode 100644 libjava/classpath/java/io/LineNumberInputStream.java create mode 100644 libjava/classpath/java/io/LineNumberReader.java create mode 100644 libjava/classpath/java/io/NotActiveException.java create mode 100644 libjava/classpath/java/io/NotSerializableException.java create mode 100644 libjava/classpath/java/io/ObjectInput.java create mode 100644 libjava/classpath/java/io/ObjectInputStream.java create mode 100644 libjava/classpath/java/io/ObjectInputValidation.java create mode 100644 libjava/classpath/java/io/ObjectOutput.java create mode 100644 libjava/classpath/java/io/ObjectOutputStream.java create mode 100644 libjava/classpath/java/io/ObjectStreamClass.java create mode 100644 libjava/classpath/java/io/ObjectStreamConstants.java create mode 100644 libjava/classpath/java/io/ObjectStreamException.java create mode 100644 libjava/classpath/java/io/ObjectStreamField.java create mode 100644 libjava/classpath/java/io/OptionalDataException.java create mode 100644 libjava/classpath/java/io/OutputStream.java create mode 100644 libjava/classpath/java/io/OutputStreamWriter.java create mode 100644 libjava/classpath/java/io/PipedInputStream.java create mode 100644 libjava/classpath/java/io/PipedOutputStream.java create mode 100644 libjava/classpath/java/io/PipedReader.java create mode 100644 libjava/classpath/java/io/PipedWriter.java create mode 100644 libjava/classpath/java/io/PrintStream.java create mode 100644 libjava/classpath/java/io/PrintWriter.java create mode 100644 libjava/classpath/java/io/PushbackInputStream.java create mode 100644 libjava/classpath/java/io/PushbackReader.java create mode 100644 libjava/classpath/java/io/RandomAccessFile.java create mode 100644 libjava/classpath/java/io/Reader.java create mode 100644 libjava/classpath/java/io/SequenceInputStream.java create mode 100644 libjava/classpath/java/io/Serializable.java create mode 100644 libjava/classpath/java/io/SerializablePermission.java create mode 100644 libjava/classpath/java/io/StreamCorruptedException.java create mode 100644 libjava/classpath/java/io/StreamTokenizer.java create mode 100644 libjava/classpath/java/io/StringBufferInputStream.java create mode 100644 libjava/classpath/java/io/StringReader.java create mode 100644 libjava/classpath/java/io/StringWriter.java create mode 100644 libjava/classpath/java/io/SyncFailedException.java create mode 100644 libjava/classpath/java/io/UTFDataFormatException.java create mode 100644 libjava/classpath/java/io/UnsupportedEncodingException.java create mode 100644 libjava/classpath/java/io/WriteAbortedException.java create mode 100644 libjava/classpath/java/io/Writer.java create mode 100644 libjava/classpath/java/io/package.html (limited to 'libjava/classpath/java/io') diff --git a/libjava/classpath/java/io/BufferedInputStream.java b/libjava/classpath/java/io/BufferedInputStream.java new file mode 100644 index 000000000..7013b0948 --- /dev/null +++ b/libjava/classpath/java/io/BufferedInputStream.java @@ -0,0 +1,379 @@ +/* BufferedInputStream.java -- An input stream that implements buffering + Copyright (C) 1998, 1999, 2001, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * plus online API docs for JDK 1.2 beta from http://www.javasoft.com. + * Status: Believed complete and correct. + */ + +/** + * This subclass of FilterInputStream buffers input from an + * underlying implementation to provide a possibly more efficient read + * mechanism. It maintains the buffer and buffer state in instance + * variables that are available to subclasses. The default buffer size + * of 2048 bytes can be overridden by the creator of the stream. + *

+ * This class also implements mark/reset functionality. It is capable + * of remembering any number of input bytes, to the limits of + * system memory or the size of Integer.MAX_VALUE + *

+ * Please note that this class does not properly handle character + * encodings. Consider using the BufferedReader class which + * does. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Warren Levy (warrenl@cygnus.com) + * @author Jeroen Frijters (jeroen@frijters.net) + */ +public class BufferedInputStream extends FilterInputStream +{ + + /** + * This is the default buffer size + */ + private static final int DEFAULT_BUFFER_SIZE = 2048; + + /** + * The buffer used for storing data from the underlying stream. + */ + protected byte[] buf; + + /** + * The number of valid bytes currently in the buffer. It is also the index + * of the buffer position one byte past the end of the valid data. + */ + protected int count; + + /** + * The index of the next character that will by read from the buffer. + * When pos == count, the buffer is empty. + */ + protected int pos; + + /** + * The value of pos when the mark() method was + * called. + * This is set to -1 if there is no mark set. + */ + protected int markpos = -1; + + /** + * This is the maximum number of bytes than can be read after a + * call to mark() before the mark can be discarded. + * After this may bytes are read, the reset() method + * may not be called successfully. + */ + protected int marklimit; + + /** + * This is the initial buffer size. When the buffer is grown because + * of marking requirements, it will be grown by bufferSize increments. + * The underlying stream will be read in chunks of bufferSize. + */ + private final int bufferSize; + + /** + * This method initializes a new BufferedInputStream that will + * read from the specified subordinate stream with a default buffer size + * of 2048 bytes + * + * @param in The subordinate stream to read from + */ + public BufferedInputStream(InputStream in) + { + this(in, DEFAULT_BUFFER_SIZE); + } + + /** + * This method initializes a new BufferedInputStream that will + * read from the specified subordinate stream with a buffer size that + * is specified by the caller. + * + * @param in The subordinate stream to read from + * @param size The buffer size to use + * + * @exception IllegalArgumentException when size is smaller then 1 + */ + public BufferedInputStream(InputStream in, int size) + { + super(in); + if (size <= 0) + throw new IllegalArgumentException(); + buf = new byte[size]; + // initialize pos & count to bufferSize, to prevent refill from + // allocating a new buffer (if the caller starts out by calling mark()). + pos = count = bufferSize = size; + } + + /** + * This method returns the number of bytes that can be read from this + * stream before a read can block. A return of 0 indicates that blocking + * might (or might not) occur on the very next read attempt. + *

+ * The number of available bytes will be the number of read ahead bytes + * stored in the internal buffer plus the number of available bytes in + * the underlying stream. + * + * @return The number of bytes that can be read before blocking could occur + * + * @exception IOException If an error occurs + */ + public synchronized int available() throws IOException + { + return count - pos + super.available(); + } + + /** + * This method closes the underlying input stream and frees any + * resources associated with it. Sets buf to null. + * + * @exception IOException If an error occurs. + */ + public void close() throws IOException + { + // Free up the array memory. + buf = null; + pos = count = 0; + markpos = -1; + super.close(); + } + + /** + * This method marks a position in the input to which the stream can be + * "reset" by calling the reset() method. The parameter + * readlimit is the number of bytes that can be read from the + * stream after setting the mark before the mark becomes invalid. For + * example, if mark() is called with a read limit of 10, then + * when 11 bytes of data are read from the stream before the + * reset() method is called, then the mark is invalid and the + * stream object instance is not required to remember the mark. + *

+ * Note that the number of bytes that can be remembered by this method + * can be greater than the size of the internal read buffer. It is also + * not dependent on the subordinate stream supporting mark/reset + * functionality. + * + * @param readlimit The number of bytes that can be read before the mark + * becomes invalid + */ + public synchronized void mark(int readlimit) + { + marklimit = readlimit; + markpos = pos; + } + + /** + * This method returns true to indicate that this class + * supports mark/reset functionality. + * + * @return true to indicate that mark/reset functionality is + * supported + * + */ + public boolean markSupported() + { + return true; + } + + /** + * This method reads an unsigned byte from the input stream and returns it + * as an int in the range of 0-255. This method also will return -1 if + * the end of the stream has been reached. + *

+ * This method will block until the byte can be read. + * + * @return The byte read or -1 if end of stream + * + * @exception IOException If an error occurs + */ + public synchronized int read() throws IOException + { + if (pos >= count && !refill()) + return -1; // EOF + + return buf[pos++] & 0xFF; + } + + /** + * This method reads bytes from a stream and stores them into a caller + * supplied buffer. It starts storing the data at index off + * into the buffer and attempts to read len bytes. This method + * can return before reading the number of bytes requested, but it will try + * to read the requested number of bytes by repeatedly calling the underlying + * stream as long as available() for this stream continues to return a + * non-zero value (or until the requested number of bytes have been read). + * The actual number of bytes read is returned as an int. A -1 is returned + * to indicate the end of the stream. + *

+ * This method will block until some data can be read. + * + * @param b The array into which the bytes read should be stored + * @param off The offset into the array to start storing bytes + * @param len The requested number of bytes to read + * + * @return The actual number of bytes read, or -1 if end of stream. + * + * @exception IOException If an error occurs. + * @exception IndexOutOfBoundsException when off or + * len are negative, or when off + len + * is larger then the size of b, + */ + public synchronized int read(byte[] b, int off, int len) throws IOException + { + if (off < 0 || len < 0 || b.length - off < len) + throw new IndexOutOfBoundsException(); + + if (len == 0) + return 0; + + if (pos >= count && !refill()) + return -1; // No bytes were read before EOF. + + int totalBytesRead = Math.min(count - pos, len); + System.arraycopy(buf, pos, b, off, totalBytesRead); + pos += totalBytesRead; + off += totalBytesRead; + len -= totalBytesRead; + + while (len > 0 && super.available() > 0 && refill()) + { + int remain = Math.min(count - pos, len); + System.arraycopy(buf, pos, b, off, remain); + pos += remain; + off += remain; + len -= remain; + totalBytesRead += remain; + } + + return totalBytesRead; + } + + /** + * This method resets a stream to the point where the mark() + * method was called. Any bytes that were read after the mark point was + * set will be re-read during subsequent reads. + *

+ * This method will throw an IOException if the number of bytes read from + * the stream since the call to mark() exceeds the mark limit + * passed when establishing the mark. + * + * @exception IOException If mark() was never called or more + * then marklimit bytes were read since the last + * call to mark() + */ + public synchronized void reset() throws IOException + { + if (markpos == -1) + throw new IOException(buf == null ? "Stream closed." : "Invalid mark."); + + pos = markpos; + } + + /** + * This method skips the specified number of bytes in the stream. It + * returns the actual number of bytes skipped, which may be less than the + * requested amount. + * + * @param n The requested number of bytes to skip + * + * @return The actual number of bytes skipped. + * + * @exception IOException If an error occurs + */ + public synchronized long skip(long n) throws IOException + { + if (buf == null) + throw new IOException("Stream closed."); + + final long origN = n; + + while (n > 0L) + { + if (pos >= count && !refill()) + break; + + int numread = (int) Math.min((long) (count - pos), n); + pos += numread; + n -= numread; + } + + return origN - n; + } + + /** + * Called to refill the buffer (when count is equal to pos). + * + * @return true when at least one additional byte was read + * into buf, false otherwise (at EOF). + */ + private boolean refill() throws IOException + { + if (buf == null) + throw new IOException("Stream closed."); + + if (markpos == -1 || count - markpos >= marklimit) + { + markpos = -1; + pos = count = 0; + } + else + { + byte[] newbuf = buf; + if (markpos < bufferSize) + { + newbuf = new byte[count - markpos + bufferSize]; + } + System.arraycopy(buf, markpos, newbuf, 0, count - markpos); + buf = newbuf; + count -= markpos; + pos -= markpos; + markpos = 0; + } + + int numread = super.read(buf, count, bufferSize); + + if (numread <= 0) // EOF + return false; + + count += numread; + return true; + } +} diff --git a/libjava/classpath/java/io/BufferedOutputStream.java b/libjava/classpath/java/io/BufferedOutputStream.java new file mode 100644 index 000000000..e6027cad6 --- /dev/null +++ b/libjava/classpath/java/io/BufferedOutputStream.java @@ -0,0 +1,191 @@ +/* BufferedOutputStream.java -- Buffer output into large blocks before writing + Copyright (C) 1998, 2000, 2003 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This class accumulates bytes written in a buffer instead of immediately + * writing the data to the underlying output sink. The bytes are instead + * as one large block when the buffer is filled, or when the stream is + * closed or explicitly flushed. This mode operation can provide a more + * efficient mechanism for writing versus doing numerous small unbuffered + * writes. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + */ +public class BufferedOutputStream extends FilterOutputStream +{ + /** + * This is the default buffer size + */ + private static final int DEFAULT_BUFFER_SIZE = 512; + + /** + * This is the internal byte array used for buffering output before + * writing it. + */ + protected byte[] buf; + + /** + * This is the number of bytes that are currently in the buffer and + * are waiting to be written to the underlying stream. It always points to + * the index into the buffer where the next byte of data will be stored + */ + protected int count; + + /** + * This method initializes a new BufferedOutputStream instance + * that will write to the specified subordinate OutputStream + * and which will use a default buffer size of 512 bytes. + * + * @param out The underlying OutputStream to write data to + */ + public BufferedOutputStream(OutputStream out) + { + this(out, DEFAULT_BUFFER_SIZE); + } + + /** + * This method initializes a new BufferedOutputStream instance + * that will write to the specified subordinate OutputStream + * and which will use the specified buffer size + * + * @param out The underlying OutputStream to write data to + * @param size The size of the internal buffer + */ + public BufferedOutputStream(OutputStream out, int size) + { + super(out); + + buf = new byte[size]; + } + + /** + * This method causes any currently buffered bytes to be immediately + * written to the underlying output stream. + * + * @exception IOException If an error occurs + */ + public synchronized void flush() throws IOException + { + if (count == 0) + return; + + out.write(buf, 0, count); + count = 0; + out.flush(); + } + + /** + * This method flushes any remaining buffered bytes then closes the + * underlying output stream. Any further attempts to write to this stream + * may throw an exception + * + public synchronized void close() throws IOException + { + flush(); + out.close(); + } + */ + + /** + * This method runs when the object is garbage collected. It is + * responsible for ensuring that all buffered bytes are written and + * for closing the underlying stream. + * + * @exception IOException If an error occurs (ignored by the Java runtime) + * + protected void finalize() throws IOException + { + close(); + } + */ + + /** + * This method writes a single byte of data. This will be written to the + * buffer instead of the underlying data source. However, if the buffer + * is filled as a result of this write request, it will be flushed to the + * underlying output stream. + * + * @param b The byte of data to be written, passed as an int + * + * @exception IOException If an error occurs + */ + public synchronized void write(int b) throws IOException + { + if (count == buf.length) + flush(); + + buf[count] = (byte)(b & 0xFF); + ++count; + } + + /** + * This method writes len bytes from the byte array + * buf starting at position offset in the buffer. + * These bytes will be written to the internal buffer. However, if this + * write operation fills the buffer, the buffer will be flushed to the + * underlying output stream. + * + * @param buf The array of bytes to write. + * @param offset The index into the byte array to start writing from. + * @param len The number of bytes to write. + * + * @exception IOException If an error occurs + */ + public synchronized void write(byte[] buf, int offset, int len) + throws IOException + { + // Buffer can hold everything. Note that the case where LEN < 0 + // is automatically handled by the downstream write. + if (len < (this.buf.length - count)) + { + System.arraycopy(buf, offset, this.buf, count, len); + count += len; + } + else + { + // The write was too big. So flush the buffer and write the new + // bytes directly to the underlying stream, per the JDK 1.2 + // docs. + flush(); + out.write (buf, offset, len); + } + } + +} // class BufferedOutputStream diff --git a/libjava/classpath/java/io/BufferedReader.java b/libjava/classpath/java/io/BufferedReader.java new file mode 100644 index 000000000..868fa3a94 --- /dev/null +++ b/libjava/classpath/java/io/BufferedReader.java @@ -0,0 +1,575 @@ +/* BufferedReader.java + Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 + Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +import gnu.java.lang.CPStringBuilder; + +/* Written using "Java Class Libraries", 2nd edition, plus online + * API docs for JDK 1.2 beta from http://www.javasoft.com. + * Status: Believed complete and correct. + */ + +/** + * This subclass of FilterReader buffers input from an + * underlying implementation to provide a possibly more efficient read + * mechanism. It maintains the buffer and buffer state in instance + * variables that are available to subclasses. The default buffer size + * of 8192 chars can be overridden by the creator of the stream. + *

+ * This class also implements mark/reset functionality. It is capable + * of remembering any number of input chars, to the limits of + * system memory or the size of Integer.MAX_VALUE + * + * @author Per Bothner (bothner@cygnus.com) + * @author Aaron M. Renn (arenn@urbanophile.com) + */ +public class BufferedReader extends Reader +{ + Reader in; + char[] buffer; + /* Index of current read position. Must be >= 0 and <= limit. */ + /* There is a special case where pos may be equal to limit+1; this + * is used as an indicator that a readLine was done with a '\r' was + * the very last char in the buffer. Since we don't want to read-ahead + * and potentially block, we set pos this way to indicate the situation + * and deal with it later. Doing it this way rather than having a + * separate boolean field to indicate the condition has the advantage + * that it is self-clearing on things like mark/reset. + */ + int pos; + /* Limit of valid data in buffer. Must be >= pos and <= buffer.length. */ + /* This can be < pos in the one special case described above. */ + int limit; + + /* The value -1 means there is no mark, or the mark has been invalidated. + Otherwise, markPos is the index in the buffer of the marked position. + Must be >= 0 and <= pos. + Note we do not explicitly store the read-limit. + The implicit read-limit is (buffer.length - markPos), which is + guaranteed to be >= the read-limit requested in the call to mark. */ + int markPos = -1; + + // The JCL book specifies the default buffer size as 8K characters. + // This is package-private because it is used by LineNumberReader. + static final int DEFAULT_BUFFER_SIZE = 8192; + + /** + * Create a new BufferedReader that will read from the + * specified subordinate stream with a default buffer size of 8192 chars. + * + * @param in The subordinate stream to read from + */ + public BufferedReader(Reader in) + { + this(in, DEFAULT_BUFFER_SIZE); + } + + /** + * Create a new BufferedReader that will read from the + * specified subordinate stream with a buffer size that is specified by the + * caller. + * + * @param in The subordinate stream to read from + * @param size The buffer size to use + * + * @exception IllegalArgumentException if size <= 0 + */ + public BufferedReader(Reader in, int size) + { + super(in.lock); + if (size <= 0) + throw new IllegalArgumentException("Illegal buffer size: " + size); + this.in = in; + buffer = new char[size]; + } + + /** + * This method closes the underlying stream and frees any associated + * resources. + * + * @exception IOException If an error occurs + */ + public void close() throws IOException + { + synchronized (lock) + { + if (in != null) + in.close(); + in = null; + buffer = null; + } + } + + /** + * Returns true to indicate that this class supports mark/reset + * functionality. + * + * @return true + */ + public boolean markSupported() + { + return true; + } + + /** + * Mark a position in the input to which the stream can be + * "reset" by calling the reset() method. The parameter + * readLimit is the number of chars that can be read from the + * stream after setting the mark before the mark becomes invalid. For + * example, if mark() is called with a read limit of 10, then + * when 11 chars of data are read from the stream before the + * reset() method is called, then the mark is invalid and the + * stream object instance is not required to remember the mark. + *

+ * Note that the number of chars that can be remembered by this method + * can be greater than the size of the internal read buffer. It is also + * not dependent on the subordinate stream supporting mark/reset + * functionality. + * + * @param readLimit The number of chars that can be read before the mark + * becomes invalid + * + * @exception IOException If an error occurs + * @exception IllegalArgumentException if readLimit is negative. + */ + public void mark(int readLimit) throws IOException + { + if (readLimit < 0) + throw new IllegalArgumentException("Read-ahead limit is negative"); + + synchronized (lock) + { + checkStatus(); + // In this method we need to be aware of the special case where + // pos + 1 == limit. This indicates that a '\r' was the last char + // in the buffer during a readLine. We'll want to maintain that + // condition after we shift things around and if a larger buffer is + // needed to track readLimit, we'll have to make it one element + // larger to ensure we don't invalidate the mark too early, if the + // char following the '\r' is NOT a '\n'. This is ok because, per + // the spec, we are not required to invalidate when passing readLimit. + // + // Note that if 'pos > limit', then doing 'limit -= pos' will cause + // limit to be negative. This is the only way limit will be < 0. + + if (pos + readLimit > limit) + { + char[] old_buffer = buffer; + int extraBuffSpace = 0; + if (pos > limit) + extraBuffSpace = 1; + if (readLimit + extraBuffSpace > limit) + buffer = new char[readLimit + extraBuffSpace]; + limit -= pos; + if (limit >= 0) + { + System.arraycopy(old_buffer, pos, buffer, 0, limit); + pos = 0; + } + } + + if (limit < 0) + { + // Maintain the relationship of 'pos > limit'. + pos = 1; + limit = markPos = 0; + } + else + markPos = pos; + // Now pos + readLimit <= buffer.length. thus if we need to read + // beyond buffer.length, then we are allowed to invalidate markPos. + } + } + + /** + * Reset the stream to the point where the mark() method + * was called. Any chars that were read after the mark point was set will + * be re-read during subsequent reads. + *

+ * This method will throw an IOException if the number of chars read from + * the stream since the call to mark() exceeds the mark limit + * passed when establishing the mark. + * + * @exception IOException If an error occurs; + */ + public void reset() throws IOException + { + synchronized (lock) + { + checkStatus(); + if (markPos < 0) + throw new IOException("mark never set or invalidated"); + + // Need to handle the extremely unlikely case where a readLine was + // done with a '\r' as the last char in the buffer; which was then + // immediately followed by a mark and a reset with NO intervening + // read of any sort. In that case, setting pos to markPos would + // lose that info and a subsequent read would thus not skip a '\n' + // (if one exists). The value of limit in this rare case is zero. + // We can assume that if limit is zero for other reasons, then + // pos is already set to zero and doesn't need to be readjusted. + if (limit > 0) + pos = markPos; + } + } + + /** + * This method determines whether or not a stream is ready to be read. If + * this method returns false then this stream could (but is + * not guaranteed to) block on the next read attempt. + * + * @return true if this stream is ready to be read, + * false otherwise + * + * @exception IOException If an error occurs + */ + public boolean ready() throws IOException + { + synchronized (lock) + { + checkStatus(); + return pos < limit || in.ready(); + } + } + + /** + * This method read chars from a stream and stores them into a caller + * supplied buffer. It starts storing the data at index + * offset into + * the buffer and attempts to read len chars. This method can + * return before reading the number of chars requested. The actual number + * of chars read is returned as an int. A -1 is returned to indicate the + * end of the stream. + *

+ * This method will block until some data can be read. + * + * @param buf The array into which the chars read should be stored + * @param offset The offset into the array to start storing chars + * @param count The requested number of chars to read + * + * @return The actual number of chars read, or -1 if end of stream. + * + * @exception IOException If an error occurs. + * @exception IndexOutOfBoundsException If offset and count are not + * valid regarding buf. + */ + public int read(char[] buf, int offset, int count) throws IOException + { + if (offset < 0 || offset + count > buf.length || count < 0) + throw new IndexOutOfBoundsException(); + + synchronized (lock) + { + checkStatus(); + // Once again, we need to handle the special case of a readLine + // that has a '\r' at the end of the buffer. In this case, we'll + // need to skip a '\n' if it is the next char to be read. + // This special case is indicated by 'pos > limit'. + boolean retAtEndOfBuffer = false; + + int avail = limit - pos; + if (count > avail) + { + if (avail > 0) + count = avail; + else // pos >= limit + { + if (limit == buffer.length) + markPos = -1; // read too far - invalidate the mark. + if (pos > limit) + { + // Set a boolean and make pos == limit to simplify things. + retAtEndOfBuffer = true; + --pos; + } + if (markPos < 0) + { + // Optimization: can read directly into buf. + if (count >= buffer.length && !retAtEndOfBuffer) + return in.read(buf, offset, count); + pos = limit = 0; + } + avail = in.read(buffer, limit, buffer.length - limit); + if (retAtEndOfBuffer && avail > 0 && buffer[limit] == '\n') + { + --avail; + limit++; + } + if (avail < count) + { + if (avail <= 0) + return avail; + count = avail; + } + limit += avail; + } + } + System.arraycopy(buffer, pos, buf, offset, count); + pos += count; + return count; + } + } + + /* Read more data into the buffer. Update pos and limit appropriately. + Assumes pos==limit initially. May invalidate the mark if read too much. + Return number of chars read (never 0), or -1 on eof. */ + private int fill() throws IOException + { + checkStatus(); + // Handle the special case of a readLine that has a '\r' at the end of + // the buffer. In this case, we'll need to skip a '\n' if it is the + // next char to be read. This special case is indicated by 'pos > limit'. + boolean retAtEndOfBuffer = false; + if (pos > limit) + { + retAtEndOfBuffer = true; + --pos; + } + + if (markPos >= 0 && limit == buffer.length) + markPos = -1; + if (markPos < 0) + pos = limit = 0; + int count = in.read(buffer, limit, buffer.length - limit); + if (count > 0) + limit += count; + + if (retAtEndOfBuffer && buffer[pos] == '\n') + { + --count; + // If the mark was set to the location of the \n, then we + // must change it to fully pretend that the \n does not + // exist. + if (markPos == pos) + ++markPos; + ++pos; + } + + return count; + } + + public int read() throws IOException + { + synchronized (lock) + { + checkStatus(); + if (pos >= limit && fill () <= 0) + return -1; + return buffer[pos++]; + } + } + + /* Return the end of the line starting at this.pos and ending at limit. + * The index returns is *before* any line terminators, or limit + * if no line terminators were found. + */ + private int lineEnd(int limit) + { + int i = pos; + for (; i < limit; i++) + { + char ch = buffer[i]; + if (ch == '\n' || ch == '\r') + break; + } + return i; + } + + /** + * This method reads a single line of text from the input stream, returning + * it as a String. A line is terminated by "\n", a "\r", or + * an "\r\n" sequence. The system dependent line separator is not used. + * The line termination characters are not returned in the resulting + * String. + * + * @return The line of text read, or null if end of stream. + * + * @exception IOException If an error occurs + */ + public String readLine() throws IOException + { + checkStatus(); + // Handle the special case where a previous readLine (with no intervening + // reads/skips) had a '\r' at the end of the buffer. + // In this case, we'll need to skip a '\n' if it's the next char to be read. + // This special case is indicated by 'pos > limit'. + if (pos > limit) + { + int ch = read(); + if (ch < 0) + return null; + if (ch != '\n') + --pos; + } + int i = lineEnd(limit); + if (i < limit) + { + String str = String.valueOf(buffer, pos, i - pos); + pos = i + 1; + // If the last char in the buffer is a '\r', we must remember + // to check if the next char to be read after the buffer is refilled + // is a '\n'. If so, skip it. To indicate this condition, we set pos + // to be limit + 1, which normally is never possible. + if (buffer[i] == '\r') + if (pos == limit || buffer[pos] == '\n') + pos++; + return str; + } + CPStringBuilder sbuf = new CPStringBuilder(200); + sbuf.append(buffer, pos, i - pos); + pos = i; + // We only want to return null when no characters were read before + // EOF. So we must keep track of this separately. Otherwise we + // would treat an empty `sbuf' as an EOF condition, which is wrong + // when there is just a newline. + boolean eof = false; + for (;;) + { + // readLine should block. So we must not return until a -1 is reached. + if (pos >= limit) + { + // here count == 0 isn't sufficient to give a failure. + int count = fill(); + if (count < 0) + { + eof = true; + break; + } + continue; + } + int ch = buffer[pos++]; + if (ch == '\n' || ch == '\r') + { + // Check here if a '\r' was the last char in the buffer; if so, + // mark it as in the comment above to indicate future reads + // should skip a newline that is the next char read after + // refilling the buffer. + if (ch == '\r') + if (pos == limit || buffer[pos] == '\n') + pos++; + break; + } + i = lineEnd(limit); + sbuf.append(buffer, pos - 1, i - (pos - 1)); + pos = i; + } + return (sbuf.length() == 0 && eof) ? null : sbuf.toString(); + } + + /** + * This method skips the specified number of chars in the stream. It + * returns the actual number of chars skipped, which may be less than the + * requested amount. + *

+ * This method first discards chars in the buffer, then calls the + * skip method on the underlying stream to skip the + * remaining chars. + * + * @param count The requested number of chars to skip + * + * @return The actual number of chars skipped. + * + * @exception IOException If an error occurs. + * @exception IllegalArgumentException If count is negative. + */ + public long skip(long count) throws IOException + { + synchronized (lock) + { + checkStatus(); + if (count < 0) + throw new IllegalArgumentException("skip value is negative"); + if (count == 0) + return 0; + // Yet again, we need to handle the special case of a readLine + // that has a '\r' at the end of the buffer. In this case, we need + // to ignore a '\n' if it is the next char to be read. + // This special case is indicated by 'pos > limit' (i.e. avail < 0). + // To simplify things, if we're dealing with the special case for + // readLine, just read the next char (since the fill method will + // skip the '\n' for us). By doing this, we'll have to back up pos. + // That's easier than trying to keep track of whether we've skipped + // one element or not. + if (pos > limit) + { + if (read() < 0) + return 0; + else + --pos; + } + + int avail = limit - pos; + + if (count < avail) + { + pos += count; + return count; + } + + pos = limit; + long todo = count - avail; + if (todo > buffer.length) + { + markPos = -1; + todo -= in.skip(todo); + } + else + { + while (todo > 0) + { + avail = fill(); + if (avail <= 0) + break; + if (avail > todo) + avail = (int) todo; + pos += avail; + todo -= avail; + } + } + return count - todo; + } + } + + private void checkStatus() throws IOException + { + if (in == null) + throw new IOException("Stream closed"); + } +} diff --git a/libjava/classpath/java/io/BufferedWriter.java b/libjava/classpath/java/io/BufferedWriter.java new file mode 100644 index 000000000..ae6751c43 --- /dev/null +++ b/libjava/classpath/java/io/BufferedWriter.java @@ -0,0 +1,262 @@ +/* BufferedWriter.java -- Buffer output into large blocks before writing + Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * Status: Complete to version 1.1. + */ + +/** + * This class accumulates chars written in a buffer instead of immediately + * writing the data to the underlying output sink. The chars are instead + * as one large block when the buffer is filled, or when the stream is + * closed or explicitly flushed. This mode operation can provide a more + * efficient mechanism for writing versus doing numerous small unbuffered + * writes. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + * @date September 25, 1998 + */ +public class BufferedWriter extends Writer +{ + /** + * This is the default buffer size + */ + private static final int DEFAULT_BUFFER_SIZE = 8192; + + /** + * This is the underlying Writer to which this object + * sends its output. + */ + private Writer out; + + /** + * This is the internal char array used for buffering output before + * writing it. + */ + char[] buffer; + + /** + * This is the number of chars that are currently in the buffer and + * are waiting to be written to the underlying stream. It always points to + * the index into the buffer where the next char of data will be stored + */ + int count; + + /** + * This method initializes a new BufferedWriter instance + * that will write to the specified subordinate Writer + * and which will use a default buffer size of 8192 chars. + * + * @param out The underlying Writer to write data to + */ + public BufferedWriter (Writer out) + { + this (out, DEFAULT_BUFFER_SIZE); + } + + /** + * This method initializes a new BufferedWriter instance + * that will write to the specified subordinate Writer + * and which will use the specified buffer size + * + * @param out The underlying Writer to write data to + * @param size The size of the internal buffer + */ + public BufferedWriter (Writer out, int size) + { + super(out.lock); + this.out = out; + this.buffer = new char[size]; + this.count = 0; + } + + /** + * This method flushes any remaining buffered chars then closes the + * underlying output stream. Any further attempts to write to this stream + * may throw an exception + * + * @exception IOException If an error occurs. + */ + public void close () throws IOException + { + synchronized (lock) + { + // It is safe to call localFlush even if the stream is already + // closed. + localFlush (); + out.close(); + buffer = null; + } + } + + /** + * This method causes any currently buffered chars to be immediately + * written to the underlying output stream. + * + * @exception IOException If an error occurs + */ + public void flush () throws IOException + { + synchronized (lock) + { + if (buffer == null) + throw new IOException ("Stream closed"); + localFlush (); + out.flush(); + } + } + + /** + * This method writes out a system depedent line separator sequence. The + * actual value written is detemined from the

line.separator + * system property. + * + * @exception IOException If an error occurs + */ + public void newLine () throws IOException + { + write (System.getProperty("line.separator")); + } + + /** + * This method writes a single char of data. This will be written to the + * buffer instead of the underlying data source. However, if the buffer + * is filled as a result of this write request, it will be flushed to the + * underlying output stream. + * + * @param oneChar The char of data to be written, passed as an int + * + * @exception IOException If an error occurs + */ + public void write (int oneChar) throws IOException + { + synchronized (lock) + { + if (buffer == null) + throw new IOException ("Stream closed"); + buffer[count++] = (char) oneChar; + if (count == buffer.length) + localFlush (); + } + } + + /** + * This method writes len chars from the char array + * buf starting at position offset in the buffer. + * These chars will be written to the internal buffer. However, if this + * write operation fills the buffer, the buffer will be flushed to the + * underlying output stream. + * + * @param buf The array of chars to write. + * @param offset The index into the char array to start writing from. + * @param len The number of chars to write. + * + * @exception IOException If an error occurs + */ + public void write (char[] buf, int offset, int len) throws IOException + { + synchronized (lock) + { + if (buffer == null) + throw new IOException ("Stream closed"); + + // Bypass buffering if there is too much incoming data. + if (count + len > buffer.length) + { + localFlush (); + out.write(buf, offset, len); + } + else + { + System.arraycopy(buf, offset, buffer, count, len); + count += len; + if (count == buffer.length) + localFlush (); + } + } + } + + /** + * This method writes len chars from the String + * str starting at position offset in the string. + * These chars will be written to the internal buffer. However, if this + * write operation fills the buffer, the buffer will be flushed to the + * underlying output stream. + * + * @param str The String to write. + * @param offset The index into the string to start writing from. + * @param len The number of chars to write. + * + * @exception IOException If an error occurs + */ + public void write (String str, int offset, int len) throws IOException + { + synchronized (lock) + { + if (buffer == null) + throw new IOException ("Stream closed"); + + if (count + len > buffer.length) + { + localFlush (); + out.write(str, offset, len); + } + else + { + str.getChars(offset, offset + len, buffer, count); + count += len; + if (count == buffer.length) + localFlush (); + } + } + } + + // This should only be called with the lock held. + private void localFlush () throws IOException + { + if (count > 0) + { + out.write(buffer, 0, count); + count = 0; + } + } +} diff --git a/libjava/classpath/java/io/ByteArrayInputStream.java b/libjava/classpath/java/io/ByteArrayInputStream.java new file mode 100644 index 000000000..f46ee3c0f --- /dev/null +++ b/libjava/classpath/java/io/ByteArrayInputStream.java @@ -0,0 +1,251 @@ +/* ByteArrayInputStream.java -- Read an array as a stream + Copyright (C) 1998, 1999, 2001, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This class permits an array of bytes to be read as an input stream. + * + * @author Warren Levy (warrenl@cygnus.com) + * @author Aaron M. Renn (arenn@urbanophile.com) + */ +public class ByteArrayInputStream extends InputStream +{ + /** + * The array that contains the data supplied during read operations + */ + protected byte[] buf; + + /** + * The array index of the next byte to be read from the buffer + * buf + */ + protected int pos; + + /** + * The currently marked position in the stream. This defaults to 0, so a + * reset operation on the stream resets it to read from array index 0 in + * the buffer - even if the stream was initially created with an offset + * greater than 0 + */ + protected int mark; + + /** + * This indicates the maximum number of bytes that can be read from this + * stream. It is the array index of the position after the last valid + * byte in the buffer buf + */ + protected int count; + + /** + * Create a new ByteArrayInputStream that will read bytes from the passed + * in byte array. This stream will read from the beginning to the end + * of the array. It is identical to calling an overloaded constructor + * as ByteArrayInputStream(buf, 0, buf.length). + *

+ * Note that this array is not copied. If its contents are changed + * while this stream is being read, those changes will be reflected in the + * bytes supplied to the reader. Please use caution in changing the + * contents of the buffer while this stream is open. + * + * @param buffer The byte array buffer this stream will read from. + */ + public ByteArrayInputStream(byte[] buffer) + { + this(buffer, 0, buffer.length); + } + + /** + * Create a new ByteArrayInputStream that will read bytes from the + * passed in byte array. This stream will read from position + * offset in the array for a length of + * length bytes past offset. If the + * stream is reset to a position before offset then + * more than length bytes can be read from the stream. + * The length value should be viewed as the array index + * one greater than the last position in the buffer to read. + *

+ * Note that this array is not copied. If its contents are changed + * while this stream is being read, those changes will be reflected in the + * bytes supplied to the reader. Please use caution in changing the + * contents of the buffer while this stream is open. + * + * @param buffer The byte array buffer this stream will read from. + * @param offset The index into the buffer to start reading bytes from + * @param length The number of bytes to read from the buffer + */ + public ByteArrayInputStream(byte[] buffer, int offset, int length) + { + if (offset < 0 || length < 0 || offset > buffer.length) + throw new IllegalArgumentException(); + + buf = buffer; + + count = offset + length; + if (count > buf.length) + count = buf.length; + + pos = offset; + mark = pos; + } + + /** + * This method returns the number of bytes available to be read from this + * stream. The value returned will be equal to count - pos. + * + * @return The number of bytes that can be read from this stream + * before blocking, which is all of them + */ + public synchronized int available() + { + return count - pos; + } + + /** + * This method sets the mark position in this stream to the current + * position. Note that the readlimit parameter in this + * method does nothing as this stream is always capable of + * remembering all the bytes int it. + *

+ * Note that in this class the mark position is set by default to + * position 0 in the stream. This is in constrast to some other + * stream types where there is no default mark position. + * + * @param readLimit The number of bytes this stream must remember. + * This parameter is ignored. + */ + public synchronized void mark(int readLimit) + { + // readLimit is ignored per Java Class Lib. book, p.220. + mark = pos; + } + + /** + * This method overrides the markSupported method in + * InputStream in order to return true - + * indicating that this stream class supports mark/reset + * functionality. + * + * @return true to indicate that this class supports + * mark/reset. + */ + public boolean markSupported() + { + return true; + } + + /** + * This method reads one byte from the stream. The pos + * counter is advanced to the next byte to be read. The byte read is + * returned as an int in the range of 0-255. If the stream position + * is already at the end of the buffer, no byte is read and a -1 is + * returned in order to indicate the end of the stream. + * + * @return The byte read, or -1 if end of stream + */ + public synchronized int read() + { + if (pos < count) + return ((int) buf[pos++]) & 0xFF; + return -1; + } + + /** + * This method reads bytes from the stream and stores them into a + * caller supplied buffer. It starts storing the data at index + * offset into the buffer and attempts to read + * len bytes. This method can return before reading + * the number of bytes requested if the end of the stream is + * encountered first. The actual number of bytes read is returned. + * If no bytes can be read because the stream is already at the end + * of stream position, a -1 is returned. + *

+ * This method does not block. + * + * @param buffer The array into which the bytes read should be stored. + * @param offset The offset into the array to start storing bytes + * @param length The requested number of bytes to read + * + * @return The actual number of bytes read, or -1 if end of stream. + */ + public synchronized int read(byte[] buffer, int offset, int length) + { + if (pos >= count) + return -1; + + int numBytes = Math.min(count - pos, length); + System.arraycopy(buf, pos, buffer, offset, numBytes); + pos += numBytes; + return numBytes; + } + + /** + * This method sets the read position in the stream to the mark + * point by setting the pos variable equal to the + * mark variable. Since a mark can be set anywhere in + * the array, the mark/reset methods int this class can be used to + * provide random search capabilities for this type of stream. + */ + public synchronized void reset() + { + pos = mark; + } + + /** + * This method attempts to skip the requested number of bytes in the + * input stream. It does this by advancing the pos + * value by the specified number of bytes. It this would exceed the + * length of the buffer, then only enough bytes are skipped to + * position the stream at the end of the buffer. The actual number + * of bytes skipped is returned. + * + * @param num The requested number of bytes to skip + * + * @return The actual number of bytes skipped. + */ + public synchronized long skip(long num) + { + // Even though the var numBytes is a long, in reality it can never + // be larger than an int since the result of subtracting 2 positive + // ints will always fit in an int. Since we have to return a long + // anyway, numBytes might as well just be a long. + long numBytes = Math.min((long) (count - pos), num < 0 ? 0L : num); + pos += numBytes; + return numBytes; + } +} diff --git a/libjava/classpath/java/io/ByteArrayOutputStream.java b/libjava/classpath/java/io/ByteArrayOutputStream.java new file mode 100644 index 000000000..9c1a86b7f --- /dev/null +++ b/libjava/classpath/java/io/ByteArrayOutputStream.java @@ -0,0 +1,284 @@ +/* BufferedReader.java + Copyright (C) 1998, 1999, 2000, 2001, 2003, 2005 + Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * Status: Complete to version 1.1. + */ + +/** + * This class allows data to be written to a byte array buffer and + * and then retrieved by an application. The internal byte array + * buffer is dynamically resized to hold all the data written. Please + * be aware that writing large amounts to data to this stream will + * cause large amounts of memory to be allocated. + *

+ * The size of the internal buffer defaults to 32 and it is resized + * by doubling the size of the buffer. This default size can be + * overridden by using the + * gnu.java.io.ByteArrayOutputStream.initialBufferSize + * property. + *

+ * There is a constructor that specified the initial buffer size and + * that is the preferred way to set that value because it it portable + * across all Java class library implementations. + *

+ * Note that this class also has methods that convert the byte array + * buffer to a String using either the system default or an + * application specified character encoding. Thus it can handle + * multibyte character encodings. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + * @date September 24, 1998 + */ +public class ByteArrayOutputStream extends OutputStream +{ + /** + * This method initializes a new ByteArrayOutputStream + * with the default buffer size of 32 bytes. If a different initial + * buffer size is desired, see the constructor + * ByteArrayOutputStream(int size). For applications + * where the source code is not available, the default buffer size + * can be set using the system property + * gnu.java.io.ByteArrayOutputStream.initialBufferSize + */ + public ByteArrayOutputStream () + { + this (initial_buffer_size); + } + + /** + * This method initializes a new ByteArrayOutputStream with + * a specified initial buffer size. + * + * @param size The initial buffer size in bytes + */ + public ByteArrayOutputStream (int size) + { + buf = new byte[size]; + count = 0; + } + + /** + * This method discards all of the bytes that have been written to + * the internal buffer so far by setting the count + * variable to 0. The internal buffer remains at its currently + * allocated size. + */ + public synchronized void reset () + { + count = 0; + } + + /** + * This method returns the number of bytes that have been written to + * the buffer so far. This is the same as the value of the protected + * count variable. If the reset method is + * called, then this value is reset as well. Note that this method does + * not return the length of the internal buffer, but only the number + * of bytes that have been written to it. + * + * @return The number of bytes in the internal buffer + * + * @see #reset() + */ + public int size () + { + return count; + } + + /** + * This method returns a byte array containing the bytes that have been + * written to this stream so far. This array is a copy of the valid + * bytes in the internal buffer and its length is equal to the number of + * valid bytes, not necessarily to the the length of the current + * internal buffer. Note that since this method allocates a new array, + * it should be used with caution when the internal buffer is very large. + */ + public synchronized byte[] toByteArray () + { + byte[] ret = new byte[count]; + System.arraycopy(buf, 0, ret, 0, count); + return ret; + } + + /** + * Returns the bytes in the internal array as a String. The + * bytes in the buffer are converted to characters using the system default + * encoding. There is an overloaded toString() method that + * allows an application specified character encoding to be used. + * + * @return A String containing the data written to this + * stream so far + */ + public String toString () + { + return new String (buf, 0, count); + } + + /** + * Returns the bytes in the internal array as a String. The + * bytes in the buffer are converted to characters using the specified + * encoding. + * + * @param enc The name of the character encoding to use + * + * @return A String containing the data written to this + * stream so far + * + * @exception UnsupportedEncodingException If the named encoding is + * not available + */ + public String toString (String enc) throws UnsupportedEncodingException + { + return new String (buf, 0, count, enc); + } + + /** + * This method returns the bytes in the internal array as a + * String. It uses each byte in the array as the low + * order eight bits of the Unicode character value and the passed in + * parameter as the high eight bits. + *

+ * This method does not convert bytes to characters in the proper way and + * so is deprecated in favor of the other overloaded toString + * methods which use a true character encoding. + * + * @param hibyte The high eight bits to use for each character in + * the String + * + * @return A String containing the data written to this + * stream so far + * + * @deprecated + */ + public String toString (int hibyte) + { + return new String (buf, hibyte, 0, count); + } + + // Resize buffer to accommodate new bytes. + private void resize (int add) + { + if (count + add > buf.length) + { + int newlen = buf.length * 2; + if (count + add > newlen) + newlen = count + add; + byte[] newbuf = new byte[newlen]; + System.arraycopy(buf, 0, newbuf, 0, count); + buf = newbuf; + } + } + + /** + * This method writes the writes the specified byte into the internal + * buffer. + * + * @param oneByte The byte to be read passed as an int + */ + public synchronized void write (int oneByte) + { + resize (1); + buf[count++] = (byte) oneByte; + } + + /** + * This method writes len bytes from the passed in array + * buf starting at index offset into the + * internal buffer. + * + * @param buffer The byte array to write data from + * @param offset The index into the buffer to start writing data from + * @param add The number of bytes to write + */ + public synchronized void write (byte[] buffer, int offset, int add) + { + // If ADD < 0 then arraycopy will throw the appropriate error for + // us. + if (add >= 0) + resize (add); + System.arraycopy(buffer, offset, buf, count, add); + count += add; + } + + /** + * This method writes all the bytes that have been written to this stream + * from the internal buffer to the specified OutputStream. + * + * @param out The OutputStream to write to + * + * @exception IOException If an error occurs + */ + public synchronized void writeTo (OutputStream out) throws IOException + { + out.write(buf, 0, count); + } + + /** + * The internal buffer where the data written is stored + */ + protected byte[] buf; + + /** + * The number of bytes that have been written to the buffer + */ + protected int count; + + /** + * The default initial buffer size. Specified by the JCL. + */ + private static final int DEFAULT_INITIAL_BUFFER_SIZE = 32; + + // The default buffer size which can be overridden by the user. + private static final int initial_buffer_size; + + static + { + int r + = Integer.getInteger ("gnu.java.io.ByteArrayOutputStream.initialBufferSize", + DEFAULT_INITIAL_BUFFER_SIZE).intValue (); + if (r <= 0) + r = DEFAULT_INITIAL_BUFFER_SIZE; + initial_buffer_size = r; + } +} diff --git a/libjava/classpath/java/io/CharArrayReader.java b/libjava/classpath/java/io/CharArrayReader.java new file mode 100644 index 000000000..8405f48f3 --- /dev/null +++ b/libjava/classpath/java/io/CharArrayReader.java @@ -0,0 +1,305 @@ +/* CharArrayReader.java -- Read an array of characters as a stream + Copyright (C) 1998, 2001, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This class permits an array of chars to be read as an input stream. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Warren Levy (warrenl@cygnus.com) + */ +public class CharArrayReader extends Reader +{ + /** + * The array that contains the data supplied during read operations + */ + protected char[] buf; + + /** + * The array index of the next char to be read from the buffer + * buf + */ + protected int pos; + + /** + * The currently marked position in the stream. This defaults to 0, so a + * reset operation on the stream resets it to read from array index 0 in + * the buffer - even if the stream was initially created with an offset + * greater than 0 + */ + protected int markedPos; + + /** + * This indicates the maximum number of chars that can be read from this + * stream. It is the array index of the position after the last valid + * char in the buffer buf + */ + protected int count; + + /** + * Create a new CharArrayReader that will read chars from the passed + * in char array. This stream will read from the beginning to the end + * of the array. It is identical to calling an overloaded constructor + * as CharArrayReader(buf, 0, buf.length). + *

+ * Note that this array is not copied. If its contents are changed + * while this stream is being read, those changes will be reflected in the + * chars supplied to the reader. Please use caution in changing the + * contents of the buffer while this stream is open. + * + * @param buffer The char array buffer this stream will read from. + */ + public CharArrayReader(char[] buffer) + { + this(buffer, 0, buffer.length); + } + + /** + * Create a new CharArrayReader that will read chars from the passed + * in char array. This stream will read from position + * offset in the array for a length of + * length chars past offset. If the + * stream is reset to a position before offset then + * more than length chars can be read from the stream. + * The length value should be viewed as the array index + * one greater than the last position in the buffer to read. + *

+ * Note that this array is not copied. If its contents are changed + * while this stream is being read, those changes will be reflected in the + * chars supplied to the reader. Please use caution in changing the + * contents of the buffer while this stream is open. + * + * @param buffer The char array buffer this stream will read from. + * @param offset The index into the buffer to start reading chars from + * @param length The number of chars to read from the buffer + */ + public CharArrayReader(char[] buffer, int offset, int length) + { + super(); + if (offset < 0 || length < 0 || offset > buffer.length) + throw new IllegalArgumentException(); + + buf = buffer; + + count = offset + length; + if (count > buf.length) + count = buf.length; + + pos = offset; + markedPos = pos; + } + + /** + * This method closes the stream. + */ + public void close() + { + synchronized (lock) + { + buf = null; + } + } + + /** + * This method sets the mark position in this stream to the current + * position. Note that the readlimit parameter in this + * method does nothing as this stream is always capable of + * remembering all the chars int it. + *

+ * Note that in this class the mark position is set by default to + * position 0 in the stream. This is in constrast to some other + * stream types where there is no default mark position. + * + * @param readAheadLimit The number of chars this stream must + * remember. This parameter is ignored. + * + * @exception IOException If an error occurs + */ + public void mark(int readAheadLimit) throws IOException + { + synchronized (lock) + { + if (buf == null) + throw new IOException("Stream closed"); + // readAheadLimit is ignored per Java Class Lib. book, p. 318. + markedPos = pos; + } + } + + /** + * This method overrides the markSupported method in + * Reader in order to return true - + * indicating that this stream class supports mark/reset + * functionality. + * + * @return true to indicate that this class supports + * mark/reset. + */ + public boolean markSupported() + { + return true; + } + + /** + * This method reads one char from the stream. The pos + * counter is advanced to the next char to be read. The char read + * is returned as an int in the range of 0-65535. If the stream + * position is already at the end of the buffer, no char is read and + * a -1 is returned in order to indicate the end of the stream. + * + * @return The char read, or -1 if end of stream + */ + public int read() throws IOException + { + synchronized (lock) + { + if (buf == null) + throw new IOException("Stream closed"); + + if (pos < 0) + throw new ArrayIndexOutOfBoundsException(pos); + + if (pos < count) + return ((int) buf[pos++]) & 0xFFFF; + return -1; + } + } + + /** + * This method reads chars from the stream and stores them into a + * caller supplied buffer. It starts storing the data at index + * offset into the buffer and attempts to read + * len chars. This method can return before reading + * the number of chars requested if the end of the stream is + * encountered first. The actual number of chars read is returned. + * If no chars can be read because the stream is already at the end + * of stream position, a -1 is returned. + *

+ * This method does not block. + * + * @param b The array into which the chars read should be stored. + * @param off The offset into the array to start storing chars + * @param len The requested number of chars to read + * + * @return The actual number of chars read, or -1 if end of stream. + */ + public int read(char[] b, int off, int len) throws IOException + { + synchronized (lock) + { + if (buf == null) + throw new IOException("Stream closed"); + + /* Don't need to check pos value, arraycopy will check it. */ + if (off < 0 || len < 0 || off + len > b.length) + throw new IndexOutOfBoundsException(); + + if (pos >= count) + return -1; + + int numChars = Math.min(count - pos, len); + System.arraycopy(buf, pos, b, off, numChars); + pos += numChars; + return numChars; + } + } + + /** + * Return true if more characters are available to be read. + * + * @return true to indicate that this stream is ready + * to be read. + * + * @specnote The JDK 1.3 API docs are wrong here. This method will + * return false if there are no more characters available. + */ + public boolean ready() throws IOException + { + if (buf == null) + throw new IOException("Stream closed"); + + return (pos < count); + } + + /** + * This method sets the read position in the stream to the mark + * point by setting the pos variable equal to the + * mark variable. Since a mark can be set anywhere in + * the array, the mark/reset methods int this class can be used to + * provide random search capabilities for this type of stream. + */ + public void reset() throws IOException + { + synchronized (lock) + { + if (buf == null) + throw new IOException("Stream closed"); + + pos = markedPos; + } + } + + /** + * This method attempts to skip the requested number of chars in the + * input stream. It does this by advancing the pos value by the + * specified number of chars. It this would exceed the length of the + * buffer, then only enough chars are skipped to position the stream at + * the end of the buffer. The actual number of chars skipped is returned. + * + * @param n The requested number of chars to skip + * + * @return The actual number of chars skipped. + */ + public long skip(long n) throws IOException + { + synchronized (lock) + { + if (buf == null) + throw new IOException("Stream closed"); + + // Even though the var numChars is a long, in reality it can never + // be larger than an int since the result of subtracting 2 positive + // ints will always fit in an int. Since we have to return a long + // anyway, numChars might as well just be a long. + long numChars = Math.min((long) (count - pos), n < 0 ? 0L : n); + pos += numChars; + return numChars; + } + } +} diff --git a/libjava/classpath/java/io/CharArrayWriter.java b/libjava/classpath/java/io/CharArrayWriter.java new file mode 100644 index 000000000..dea727aa1 --- /dev/null +++ b/libjava/classpath/java/io/CharArrayWriter.java @@ -0,0 +1,352 @@ +/* CharArrayWriter.java -- Write chars to a buffer + Copyright (C) 1998, 1999, 2001, 2002, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This class allows data to be written to a char array buffer and + * and then retrieved by an application. The internal char array + * buffer is dynamically resized to hold all the data written. Please + * be aware that writing large amounts to data to this stream will + * cause large amounts of memory to be allocated. + *

+ * The size of the internal buffer defaults to 32 and it is resized + * in increments of 1024 chars. This behavior can be over-ridden by using the + * following two properties: + *

+ *

+ *

+ * There is a constructor that specified the initial buffer size and + * that is the preferred way to set that value because it it portable + * across all Java class library implementations. + *

+ * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + */ +public class CharArrayWriter extends Writer +{ + /** + * The default initial buffer size + */ + private static final int DEFAULT_INITIAL_BUFFER_SIZE = 32; + + /** + * This method initializes a new CharArrayWriter with + * the default buffer size of 32 chars. If a different initial + * buffer size is desired, see the constructor + * CharArrayWriter(int size). + */ + public CharArrayWriter () + { + this (DEFAULT_INITIAL_BUFFER_SIZE); + } + + /** + * This method initializes a new CharArrayWriter with + * a specified initial buffer size. + * + * @param size The initial buffer size in chars + */ + public CharArrayWriter (int size) + { + super (); + buf = new char[size]; + } + + /** + * Closes the stream. This method is guaranteed not to free the contents + * of the internal buffer, which can still be retrieved. + */ + public void close () + { + } + + /** + * This method flushes all buffered chars to the stream. + */ + public void flush () + { + } + + /** + * This method discards all of the chars that have been written to the + * internal buffer so far by setting the count variable to + * 0. The internal buffer remains at its currently allocated size. + */ + public void reset () + { + synchronized (lock) + { + count = 0; + } + } + + /** + * This method returns the number of chars that have been written to + * the buffer so far. This is the same as the value of the protected + * count variable. If the reset method is + * called, then this value is reset as well. Note that this method does + * not return the length of the internal buffer, but only the number + * of chars that have been written to it. + * + * @return The number of chars in the internal buffer + * + * @see #reset() + */ + public int size () + { + return count; + } + + /** + * This method returns a char array containing the chars that have been + * written to this stream so far. This array is a copy of the valid + * chars in the internal buffer and its length is equal to the number of + * valid chars, not necessarily to the the length of the current + * internal buffer. Note that since this method allocates a new array, + * it should be used with caution when the internal buffer is very large. + */ + public char[] toCharArray () + { + synchronized (lock) + { + char[] nc = new char[count]; + System.arraycopy(buf, 0, nc, 0, count); + return nc; + } + } + + /** + * Returns the chars in the internal array as a String. The + * chars in the buffer are converted to characters using the system default + * encoding. There is an overloaded toString() method that + * allows an application specified character encoding to be used. + * + * @return A String containing the data written to this + * stream so far + */ + public String toString () + { + synchronized (lock) + { + return new String (buf, 0, count); + } + } + + /** + * This method writes the writes the specified char into the internal + * buffer. + * + * @param oneChar The char to be read passed as an int + */ + public void write (int oneChar) + { + synchronized (lock) + { + resize (1); + buf[count++] = (char) oneChar; + } + } + + /** + * This method writes len chars from the passed in array + * buf starting at index offset into that buffer + * + * @param buffer The char array to write data from + * @param offset The index into the buffer to start writing data from + * @param len The number of chars to write + */ + public void write (char[] buffer, int offset, int len) + { + synchronized (lock) + { + if (len >= 0) + resize (len); + System.arraycopy(buffer, offset, buf, count, len); + count += len; + } + } + + /** + * This method writes len chars from the passed in + * String buf starting at index + * offset into the internal buffer. + * + * @param str The String to write data from + * @param offset The index into the string to start writing data from + * @param len The number of chars to write + */ + public void write (String str, int offset, int len) + { + synchronized (lock) + { + if (len >= 0) + resize (len); + str.getChars(offset, offset + len, buf, count); + count += len; + } + } + + /** + * This method writes all the chars that have been written to this stream + * from the internal buffer to the specified Writer. + * + * @param out The Writer to write to + * + * @exception IOException If an error occurs + */ + public void writeTo (Writer out) throws IOException + { + synchronized (lock) + { + out.write(buf, 0, count); + } + } + + /** + * Appends the Unicode character, c, to the output stream + * underlying this writer. This is equivalent to write(c). + * + * @param c the character to append. + * @return a reference to this object. + * @since 1.5 + */ + public CharArrayWriter append(char c) + { + write(c); + return this; + } + + /** + * Appends the specified sequence of Unicode characters to the + * output stream underlying this writer. This is equivalent to + * appending the results of calling toString() on the + * character sequence. As a result, the entire sequence may not be + * appended, as it depends on the implementation of + * toString() provided by the + * CharSequence. For example, if the character + * sequence is wrapped around an input buffer, the results will + * depend on the current position and length of that buffer. + * + * @param cs the character sequence to append. If seq is null, + * then the string "null" (the string representation of null) + * is appended. + * @return a reference to this object. + * @since 1.5 + */ + public CharArrayWriter append(CharSequence cs) + { + try + { + write(cs == null ? "null" : cs.toString()); + } + catch (IOException _) + { + // Can't happen. + } + return this; + } + + /** + * Appends the specified subsequence of Unicode characters to the + * output stream underlying this writer, starting and ending at the + * specified positions within the sequence. The behaviour of this + * method matches the behaviour of writing the result of + * append(seq.subSequence(start,end)) when the sequence + * is not null. + * + * @param cs the character sequence to append. If seq is null, + * then the string "null" (the string representation of null) + * is appended. + * @param start the index of the first Unicode character to use from + * the sequence. + * @param end the index of the last Unicode character to use from the + * sequence. + * @return a reference to this object. + * @throws IndexOutOfBoundsException if either of the indices are negative, + * the start index occurs after the end index, or the end index is + * beyond the end of the sequence. + * @since 1.5 + */ + public CharArrayWriter append(CharSequence cs, int start, int end) + { + try + { + write(cs == null ? "null" : cs.subSequence(start, end).toString()); + } + catch (IOException _) + { + // Can't happen. + } + return this; + } + + /** + * This private method makes the buffer bigger when we run out of room + * by allocating a larger buffer and copying the valid chars from the + * old array into it. This is obviously slow and should be avoided by + * application programmers by setting their initial buffer size big + * enough to hold everything if possible. + */ + private void resize (int len) + { + if (count + len >= buf.length) + { + int newlen = buf.length * 2; + if (count + len > newlen) + newlen = count + len; + char[] newbuf = new char[newlen]; + System.arraycopy(buf, 0, newbuf, 0, count); + buf = newbuf; + } + } + + /** + * The internal buffer where the data written is stored + */ + protected char[] buf; + + /** + * The number of chars that have been written to the buffer + */ + protected int count; +} diff --git a/libjava/classpath/java/io/CharConversionException.java b/libjava/classpath/java/io/CharConversionException.java new file mode 100644 index 000000000..a7a608429 --- /dev/null +++ b/libjava/classpath/java/io/CharConversionException.java @@ -0,0 +1,73 @@ +/* CharConversionException.java -- Character conversion exceptions + Copyright (C) 1998, 1999, 2001, 2002, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This exception is thrown to indicate that a problem occurred with + * an attempted character conversion. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + * @since 1.1 + * @status updated to 1.4 + */ +public class CharConversionException extends IOException +{ + /** + * Compatible with JDK 1.1+. + */ + private static final long serialVersionUID = -8680016352018427031L; + + /** + * Create an exception without a descriptive error message. + */ + public CharConversionException() + { + } + + /** + * Create an exception with a descriptive error message. + * + * @param message the descriptive error message + */ + public CharConversionException(String message) + { + super(message); + } +} // class CharConversionException diff --git a/libjava/classpath/java/io/Closeable.java b/libjava/classpath/java/io/Closeable.java new file mode 100644 index 000000000..b8523d79e --- /dev/null +++ b/libjava/classpath/java/io/Closeable.java @@ -0,0 +1,63 @@ +/* Closeable.java -- Closeable object + Copyright (C) 2004, 2005 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package java.io; + +/** + * A Closeable class represents a stream of + * data, which can be closed when it is no longer needed. + * Closing a stream allows the resources it uses to be + * freed for an alternate use. + * + * @author Tom Tromey (tromey@redhat.com) + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + * @since 1.5 + */ +public interface Closeable +{ + + /** + * Closes the stream represented by this class, thus freeing + * system resources. In that case that the stream is already + * in the closed state, this method has no effect. + * + * @throws IOException if an I/O error occurs in closing. + */ + void close() + throws IOException; + +} diff --git a/libjava/classpath/java/io/DataInput.java b/libjava/classpath/java/io/DataInput.java new file mode 100644 index 000000000..a713319cf --- /dev/null +++ b/libjava/classpath/java/io/DataInput.java @@ -0,0 +1,456 @@ +/* DataInput.java -- Interface for reading data from a stream + Copyright (C) 1998, 1999, 2001, 2003, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * plus online API docs for JDK 1.2 beta from http://www.javasoft.com. + * Status: Believed complete and correct. */ + +/** + * This interface is implemented by classes that can data from streams + * into Java primitive types. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Warren Levy (warrenl@cygnus.com) + */ +public interface DataInput +{ + + /** + * This method reads a Java boolean value from an input stream. It does + * so by reading a single byte of data. If that byte is zero, then the + * value returned is false. If the byte is non-zero, then + * the value returned is true. + *

+ * This method can read a boolean written by an object + * implementing the writeBoolean() method in the + * DataOutput interface. + * + * @return The boolean value read + * + * @exception EOFException If end of file is reached before + * reading the boolean + * @exception IOException If any other error occurs + * + * @see DataOutput#writeBoolean + */ + boolean readBoolean() throws EOFException, IOException; + + /** + * This method reads a Java byte value from an input stream. The value + * is in the range of -128 to 127. + *

+ * This method can read a byte written by an object + * implementing the + * writeByte() method in the DataOutput interface. + *

+ * @return The byte value read + * + * @exception EOFException If end of file is reached before reading the byte + * @exception IOException If any other error occurs + * + * @see DataOutput#writeByte + */ + byte readByte() throws EOFException, IOException; + + /** + * This method reads 8 unsigned bits into a Java int value from + * the stream. The value returned is in the range of 0 to 255. + *

+ * This method can read an unsigned byte written by an object + * implementing the + * writeByte() method in the DataOutput + * interface. + * + * @return The unsigned bytes value read as a Java int. + * + * @exception EOFException If end of file is reached before reading the value + * @exception IOException If any other error occurs + * + * @see DataOutput#writeByte + */ + int readUnsignedByte() throws EOFException, IOException; + + /** + * This method reads a Java char value from an input stream. + * It operates by reading two bytes from the stream and converting them to + * a single 16-bit Java char. The two bytes are stored most + * significant byte first (i.e., "big endian") regardless of the native + * host byte ordering. + *

+ * As an example, if byte1 and byte2 represent the + * first and second byte read from the stream respectively, they will be + * transformed to a char in the following manner: + *

+ * (char)((byte1 << 8) + byte2) + *

+ * This method can read a char written by an object implementing + * the + * writeChar() method in the DataOutput interface. + * + * @return The char value read + * + * @exception EOFException If end of file is reached before reading the char + * @exception IOException If any other error occurs + * + * @see DataOutput#writeChar + */ + char readChar() throws EOFException, IOException; + + /** + * This method reads a signed 16-bit value into a Java in from the stream. + * It operates by reading two bytes from the stream and converting them to + * a single 16-bit Java short. The two bytes are stored most + * significant byte first (i.e., "big endian") regardless of the native + * host byte ordering. + *

+ * As an example, if byte1 and byte2 represent the + * first and second byte read from the stream respectively, they will be + * transformed to a short in the following manner: + *

+ * (short)(((byte1 & 0xFF) << 8) + (byte2 & 0xFF)) + *

+ * The value returned is in the range of -32768 to 32767. + *

+ * This method can read a short written by an object + * implementing + * the writeShort() method in the DataOutput + * interface. + * + * @return The short value read + * + * @exception EOFException If end of file is reached before reading the value + * @exception IOException If any other error occurs + * + * @see DataOutput#writeShort + */ + short readShort() throws EOFException, IOException; + + /** + * This method reads 16 unsigned bits into a Java int value from the stream. + * It operates by reading two bytes from the stream and converting them to + * a single Java int. The two bytes are stored most + * significant byte first (i.e., "big endian") regardless of the native + * host byte ordering. + *

+ * As an example, if byte1 and byte2 represent the + * first and second byte read from the stream respectively, they will be + * transformed to an int in the following manner: + *

+ * (int)(((byte1 0xFF) << 8) + (byte2 & 0xFF)) + *

+ * The value returned is in the range of 0 to 65535. + *

+ * This method can read an unsigned short written by an object implementing + * the writeShort() method in the + * DataOutput + * interface. + * + * @return The unsigned short value read as a Java int. + * + * @exception EOFException If end of file is reached before reading + * the value + * @exception IOException If any other error occurs + * + * @see DataOutput#writeShort + */ + int readUnsignedShort() throws EOFException, IOException; + + /** + * This method reads a Java int value from an input stream + * It operates by reading four bytes from the stream and converting them to + * a single Java int. The bytes are stored most + * significant byte first (i.e., "big endian") regardless of the native + * host byte ordering. + *

+ * As an example, if byte1 through byte4 represent + * the first four bytes read from the stream, they will be + * transformed to an int in the following manner: + *

+ * (int)(((byte1 & 0xFF) << 24) + ((byte2 & 0xFF) << 16) + + * ((byte3 & 0xFF)<< 8) + (byte4 & 0xFF))) + *

+ * The value returned is in the range of -2147483648 to 2147483647. + *

+ * This method can read an int written by an object + * implementing the writeInt() method in the + * DataOutput interface. + * + * @return The int value read + * + * @exception EOFException If end of file is reached before reading the int + * @exception IOException If any other error occurs + * + * @see DataOutput#writeInt + */ + int readInt() throws EOFException, IOException; + + /** + * This method reads a Java long value from an input stream + * It operates by reading eight bytes from the stream and converting them to + * a single Java long. The bytes are stored most + * significant byte first (i.e., "big endian") regardless of the native + * host byte ordering. + *

+ * As an example, if byte1 through byte8 represent + * the first eight bytes read from the stream, they will be + * transformed to an long in the following manner: + *

+ * (long)(((byte1 & 0xFF) << 56) + ((byte2 & 0xFF) << 48) + + * ((byte3 & 0xFF) << 40) + ((byte4 & 0xFF) << 32) + + * ((byte5 & 0xFF) << 24) + ((byte6 & 0xFF) << 16) + + * ((byte7 & 0xFF) << 8) + (byte8 & 0xFF))) + * + *

+ * The value returned is in the range of -9223372036854775808 to + * 9223372036854775807. + *

+ * This method can read an long written by an object + * implementing the writeLong() method in the + * DataOutput interface. + * + * @return The long value read + * + * @exception EOFException If end of file is reached before reading the long + * @exception IOException If any other error occurs + * + * @see DataOutput#writeLong + */ + long readLong() throws EOFException, IOException; + + /** + * This method reads a Java float value from an input stream. It operates + * by first reading an int value from the stream by calling the + * readInt() method in this interface, then converts that + * int to a float using the + * intBitsToFloat method in the class + * java.lang.Float. + *

+ * This method can read a float written by an object + * implementing + * the writeFloat() method in the DataOutput + * interface. + * + * @return The float value read + * + * @exception EOFException If end of file is reached before reading the + * float + * @exception IOException If any other error occurs + * + * @see DataOutput#writeFloat + * @see java.lang.Float#intBitsToFloat + */ + float readFloat() throws EOFException, IOException; + + /** + * This method reads a Java double value from an input stream. It operates + * by first reading a long value from the stream by calling the + * readLong() method in this interface, then converts that + * long to a double using the + * longBitsToDouble method in the class + * java.lang.Double. + *

+ * This method can read a double written by an object + * implementing the writeDouble() method in the + * DataOutput interface. + * + * @return The double value read + * + * @exception EOFException If end of file is reached before reading the + * double + * @exception IOException If any other error occurs + * + * @see DataOutput#writeDouble + * @see java.lang.Double#longBitsToDouble + */ + double readDouble() throws EOFException, IOException; + + /** + * This method reads the next line of text data from an input stream. + * It operates by reading bytes and converting those bytes to + * char + * values by treating the byte read as the low eight bits of the + * char and using 0 as the high eight bits. Because of this, + * it does not support the full 16-bit Unicode character set. + *

+ * The reading of bytes ends when either the end of file or a line terminator + * is encountered. The bytes read are then returned as a + * String. + * A line terminator is a byte sequence consisting of either + * \r, \n or \r\n. These termination + * charaters are discarded and are not returned as part of the string. + * A line is also terminated by an end of file condition. + *

+ * + * @return The line read as a String + * + * @exception IOException If an error occurs + */ + String readLine() throws IOException; + + /** + * This method reads a String from an input stream that is + * encoded in a modified UTF-8 format. This format has a leading two byte + * sequence that contains the remaining number of bytes to read. + * This two byte + * sequence is read using the readUnsignedShort() method of this + * interface. + * + * After the number of remaining bytes have been determined, these bytes + * are read an transformed into char values. These + * char values are encoded in the stream using either a one, + * two, or three byte format. + * The particular format in use can be determined by examining the first + * byte read. + *

+ * If the first byte has a high order bit of 0, then + * that character consists on only one byte. This character value consists + * of seven bits that are at positions 0 through 6 of the byte. As an + * example, if byte1 is the byte read from the stream, it would + * be converted to a char like so: + *

+ * (char)byte1 + *

+ * If the first byte has 110 as its high order bits, then the + * character consists of two bytes. The bits that make up the character + * value are in positions 0 through 4 of the first byte and bit positions + * 0 through 5 of the second byte. (The second byte should have + * 10 as its high order bits). These values are in most significant + * byte first (i.e., "big endian") order. + *

+ * As an example, if byte1 and byte2 are the first + * two bytes read respectively, and the high order bits of them match the + * patterns which indicate a two byte character encoding, then they would be + * converted to a Java char like so: + *

+ * (char)(((byte1 & 0x1F) << 6) + (byte2 & 0x3F)) + *

+ * If the first byte has a 1110 as its high order bits, then the + * character consists of three bytes. The bits that make up the character + * value are in positions 0 through 3 of the first byte and bit positions + * 0 through 5 of the other two bytes. (The second and third bytes should + * have 10 as their high order bits). These values are in most + * significant byte first (i.e., "big endian") order. + *

+ * As an example, if byte1, byte2, and + * byte3 are the three bytes read, and the high order bits of + * them match the patterns which indicate a three byte character encoding, + * then they would be converted to a Java char like so: + * + * + * (char)(((byte1 & 0x0F) << 12) + ((byte2 & 0x3F) + (byte3 & 0x3F)) + * + * + * Note that all characters are encoded in the method that requires the + * fewest number of bytes with the exception of the character with the + * value of \<llll>u0000 which is encoded as two bytes. + * This is a modification of the UTF standard used to prevent C language + * style NUL values from appearing in the byte stream. + *

+ * This method can read data that was written by an object implementing the + * writeUTF() method in DataOutput. + * + * @return The String read + * + * @exception EOFException If end of file is reached before reading the + * String + * @exception UTFDataFormatException If the data is not in UTF-8 format + * @exception IOException If any other error occurs + * + * @see DataOutput#writeUTF + */ + String readUTF() throws EOFException, UTFDataFormatException, IOException; + + /** + * This method reads raw bytes into the passed array until the array is + * full. Note that this method blocks until the data is available and + * throws an exception if there is not enough data left in the stream to + * fill the buffer. Note also that zero length buffers are permitted. + * In this case, the method will return immediately without reading any + * bytes from the stream. + * + * @param buf The buffer into which to read the data + * + * @exception EOFException If end of file is reached before filling the + * buffer + * @exception IOException If any other error occurs + */ + void readFully(byte[] buf) throws EOFException, IOException; + + /** + * This method reads raw bytes into the passed array buf + * starting + * offset bytes into the buffer. The number of bytes read + * will be + * exactly len. Note that this method blocks until the data is + * available and throws an exception if there is not enough data left in + * the stream to read len bytes. Note also that zero length + * buffers are permitted. In this case, the method will return immediately + * without reading any bytes from the stream. + * + * @param buf The buffer into which to read the data + * @param offset The offset into the buffer to start storing data + * @param len The number of bytes to read into the buffer + * + * @exception EOFException If end of file is reached before filling the + * buffer + * @exception IOException If any other error occurs + */ + void readFully(byte[] buf, int offset, int len) + throws EOFException, IOException; + + /** + * This method skips and discards the specified number of bytes in an + * input stream. Note that this method may skip less than the requested + * number of bytes. The actual number of bytes skipped is returned. + * No bytes are skipped if a negative number is passed to this method. + * + * @param numBytes The number of bytes to skip + * + * @return The number of bytes actually skipped, which will always be + * numBytes + * + * @exception EOFException If end of file is reached before all bytes can be + * skipped + * @exception IOException If any other error occurs + */ + int skipBytes(int numBytes) throws EOFException, IOException; + +} // interface DataInput diff --git a/libjava/classpath/java/io/DataInputStream.java b/libjava/classpath/java/io/DataInputStream.java new file mode 100644 index 000000000..518205b24 --- /dev/null +++ b/libjava/classpath/java/io/DataInputStream.java @@ -0,0 +1,785 @@ +/* DataInputStream.java -- FilteredInputStream that implements DataInput + Copyright (C) 1998, 1999, 2000, 2001, 2003, 2005, 2008 + Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package java.io; + +import gnu.java.lang.CPStringBuilder; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * plus online API docs for JDK 1.2 beta from http://www.javasoft.com. + * Status: Believed complete and correct. + */ + +/** + * This subclass of FilteredInputStream implements the + * DataInput interface that provides method for reading primitive + * Java data types from a stream. + * + * @see DataInput + * + * @author Warren Levy (warrenl@cygnus.com) + * @author Aaron M. Renn (arenn@urbanophile.com) + * @date October 20, 1998. + */ +public class DataInputStream extends FilterInputStream implements DataInput +{ + // Byte buffer, used to make primitive read calls more efficient. + byte[] buf = new byte [8]; + + /** + * This constructor initializes a new DataInputStream + * to read from the specified subordinate stream. + * + * @param in The subordinate InputStream to read from + */ + public DataInputStream (InputStream in) + { + super (in); + } + + /** + * This method reads bytes from the underlying stream into the specified + * byte array buffer. It will attempt to fill the buffer completely, but + * may return a short count if there is insufficient data remaining to be + * read to fill the buffer. + * + * @param b The buffer into which bytes will be read. + * + * @return The actual number of bytes read, or -1 if end of stream reached + * before reading any bytes. + * + * @exception IOException If an error occurs. + */ + public final int read (byte[] b) throws IOException + { + return in.read (b, 0, b.length); + } + + /** + * This method reads bytes from the underlying stream into the specified + * byte array buffer. It will attempt to read len bytes and + * will start storing them at position off into the buffer. + * This method can return a short count if there is insufficient data + * remaining to be read to complete the desired read length. + * + * @param b The buffer into which bytes will be read. + * @param off The offset into the buffer to start storing bytes. + * @param len The requested number of bytes to read. + * + * @return The actual number of bytes read, or -1 if end of stream reached + * before reading any bytes. + * + * @exception IOException If an error occurs. + */ + public final int read (byte[] b, int off, int len) throws IOException + { + return in.read (b, off, len); + } + + /** + * This method reads a Java boolean value from an input stream. It does + * so by reading a single byte of data. If that byte is zero, then the + * value returned is false. If the byte is non-zero, then + * the value returned is true. + *

+ * This method can read a boolean written by an object + * implementing the writeBoolean() method in the + * DataOutput interface. + * + * @return The boolean value read + * + * @exception EOFException If end of file is reached before reading + * the boolean + * @exception IOException If any other error occurs + * + * @see DataOutput#writeBoolean + */ + public final boolean readBoolean () throws IOException + { + return convertToBoolean (in.read ()); + } + + /** + * This method reads a Java byte value from an input stream. The value + * is in the range of -128 to 127. + *

+ * This method can read a byte written by an object + * implementing the writeByte() method in the + * DataOutput interface. + * + * @return The byte value read + * + * @exception EOFException If end of file is reached before reading the byte + * @exception IOException If any other error occurs + * + * @see DataOutput#writeByte + */ + public final byte readByte () throws IOException + { + return convertToByte (in.read ()); + } + + /** + * This method reads a Java char value from an input stream. + * It operates by reading two bytes from the stream and converting them to + * a single 16-bit Java char. The two bytes are stored most + * significant byte first (i.e., "big endian") regardless of the native + * host byte ordering. + *

+ * As an example, if byte1 and byte2 + * represent the first and second byte read from the stream + * respectively, they will be transformed to a char in + * the following manner: + *

+ * (char)(((byte1 & 0xFF) << 8) | (byte2 & 0xFF) + *

+ * This method can read a char written by an object + * implementing the writeChar() method in the + * DataOutput interface. + * + * @return The char value read + * + * @exception EOFException If end of file is reached before reading the char + * @exception IOException If any other error occurs + * + * @see DataOutput#writeChar + */ + public final char readChar () throws IOException + { + readFully (buf, 0, 2); + return convertToChar (buf); + } + + /** + * This method reads a Java double value from an input stream. It operates + * by first reading a long value from the stream by calling the + * readLong() method in this interface, then converts + * that long to a double using the + * longBitsToDouble method in the class + * java.lang.Double + *

+ * This method can read a double written by an object + * implementing the writeDouble() method in the + * DataOutput interface. + * + * @return The double value read + * + * @exception EOFException If end of file is reached before reading + * the double + * @exception IOException If any other error occurs + * + * @see DataOutput#writeDouble + * @see java.lang.Double#longBitsToDouble + */ + public final double readDouble () throws IOException + { + return Double.longBitsToDouble (readLong ()); + } + + /** + * This method reads a Java float value from an input stream. It + * operates by first reading an int value from the + * stream by calling the readInt() method in this + * interface, then converts that int to a + * float using the intBitsToFloat method + * in the class java.lang.Float + *

+ * This method can read a float written by an object + * implementing the writeFloat() method in the + * DataOutput interface. + * + * @return The float value read + * + * @exception EOFException If end of file is reached before reading the float + * @exception IOException If any other error occurs + * + * @see DataOutput#writeFloat + * @see java.lang.Float#intBitsToFloat + */ + public final float readFloat () throws IOException + { + return Float.intBitsToFloat (readInt ()); + } + + /** + * This method reads raw bytes into the passed array until the array is + * full. Note that this method blocks until the data is available and + * throws an exception if there is not enough data left in the stream to + * fill the buffer. Note also that zero length buffers are permitted. + * In this case, the method will return immediately without reading any + * bytes from the stream. + * + * @param b The buffer into which to read the data + * + * @exception EOFException If end of file is reached before filling the + * buffer + * @exception IOException If any other error occurs + */ + public final void readFully (byte[] b) throws IOException + { + readFully (b, 0, b.length); + } + + /** + * This method reads raw bytes into the passed array buf + * starting + * offset bytes into the buffer. The number of bytes read + * will be + * exactly len. Note that this method blocks until the data is + * available and throws an exception if there is not enough data left in + * the stream to read len bytes. Note also that zero length + * buffers are permitted. In this case, the method will return immediately + * without reading any bytes from the stream. + * + * @param buf The buffer into which to read the data + * @param offset The offset into the buffer to start storing data + * @param len The number of bytes to read into the buffer + * + * @exception EOFException If end of file is reached before filling the + * buffer + * @exception IOException If any other error occurs + */ + public final void readFully (byte[] buf, int offset, int len) throws IOException + { + if (len < 0) + throw new IndexOutOfBoundsException("Negative length: " + len); + + while (len > 0) + { + // in.read will block until some data is available. + int numread = in.read (buf, offset, len); + if (numread < 0) + throw new EOFException (); + len -= numread; + offset += numread; + } + } + + /** + * This method reads a Java int value from an input stream + * It operates by reading four bytes from the stream and converting them to + * a single Java int. The bytes are stored most + * significant byte first (i.e., "big endian") regardless of the native + * host byte ordering. + *

+ * As an example, if byte1 through byte4 represent + * the first four bytes read from the stream, they will be + * transformed to an int in the following manner: + *

+ * (int)(((byte1 & 0xFF) << 24) + ((byte2 & 0xFF) << 16) + + * ((byte3 & 0xFF)<< 8) + (byte4 & 0xFF))) + *

+ * The value returned is in the range of -2147483648 to 2147483647. + *

+ * This method can read an int written by an object + * implementing the writeInt() method in the + * DataOutput interface. + * + * @return The int value read + * + * @exception EOFException If end of file is reached before reading the int + * @exception IOException If any other error occurs + * + * @see DataOutput#writeInt + */ + public final int readInt () throws IOException + { + readFully (buf, 0, 4); + return convertToInt (buf); + } + + /** + * This method reads the next line of text data from an input + * stream. It operates by reading bytes and converting those bytes + * to char values by treating the byte read as the low + * eight bits of the char and using 0 as the high eight + * bits. Because of this, it does not support the full 16-bit + * Unicode character set. + *

+ * The reading of bytes ends when either the end of file or a line + * terminator is encountered. The bytes read are then returned as a + * String A line terminator is a byte sequence + * consisting of either \r, \n or + * \r\n. These termination charaters are discarded and + * are not returned as part of the string. + *

+ * This method can read data that was written by an object implementing the + * writeLine() method in DataOutput. + * + * @return The line read as a String + * + * @exception IOException If an error occurs + * + * @see DataOutput + * + * @deprecated + */ + public final String readLine() throws IOException + { + CPStringBuilder strb = new CPStringBuilder(); + + while (true) + { + int c = in.read(); + if (c == -1) // got an EOF + return strb.length() > 0 ? strb.toString() : null; + if (c == '\r') + { + int next_c = in.read(); + if (next_c != '\n' && next_c != -1) + { + if (!(in instanceof PushbackInputStream)) + in = new PushbackInputStream(in); + ((PushbackInputStream) in).unread(next_c); + } + break; + } + if (c == '\n') + break; + strb.append((char) c); + } + + return strb.length() > 0 ? strb.toString() : ""; + } + + /** + * This method reads a Java long value from an input stream + * It operates by reading eight bytes from the stream and converting them to + * a single Java long. The bytes are stored most + * significant byte first (i.e., "big endian") regardless of the native + * host byte ordering. + *

+ * As an example, if byte1 through byte8 represent + * the first eight bytes read from the stream, they will be + * transformed to an long in the following manner: + *

+ * (long)(((byte1 & 0xFF) << 56) + ((byte2 & 0xFF) << 48) + + * ((byte3 & 0xFF) << 40) + ((byte4 & 0xFF) << 32) + + * ((byte5 & 0xFF) << 24) + ((byte6 & 0xFF) << 16) + + * ((byte7 & 0xFF) << 8) + (byte8 & 0xFF))) + * + *

+ * The value returned is in the range of -9223372036854775808 to + * 9223372036854775807. + *

+ * This method can read an long written by an object + * implementing the writeLong() method in the + * DataOutput interface. + * + * @return The long value read + * + * @exception EOFException If end of file is reached before reading the long + * @exception IOException If any other error occurs + * + * @see DataOutput#writeLong + */ + public final long readLong () throws IOException + { + readFully (buf, 0, 8); + return convertToLong (buf); + } + + /** + * This method reads a signed 16-bit value into a Java in from the + * stream. It operates by reading two bytes from the stream and + * converting them to a single 16-bit Java short. The + * two bytes are stored most significant byte first (i.e., "big + * endian") regardless of the native host byte ordering. + *

+ * As an example, if byte1 and byte2 + * represent the first and second byte read from the stream + * respectively, they will be transformed to a short. in + * the following manner: + *

+ * (short)(((byte1 & 0xFF) << 8) | (byte2 & 0xFF)) + *

+ * The value returned is in the range of -32768 to 32767. + *

+ * This method can read a short written by an object + * implementing the writeShort() method in the + * DataOutput interface. + * + * @return The short value read + * + * @exception EOFException If end of file is reached before reading the value + * @exception IOException If any other error occurs + * + * @see DataOutput#writeShort + */ + public final short readShort () throws IOException + { + readFully (buf, 0, 2); + return convertToShort (buf); + } + + /** + * This method reads 8 unsigned bits into a Java int + * value from the stream. The value returned is in the range of 0 to + * 255. + *

+ * This method can read an unsigned byte written by an object + * implementing the writeUnsignedByte() method in the + * DataOutput interface. + * + * @return The unsigned bytes value read as a Java int. + * + * @exception EOFException If end of file is reached before reading the value + * @exception IOException If any other error occurs + * + * @see DataOutput#writeByte + */ + public final int readUnsignedByte () throws IOException + { + return convertToUnsignedByte (in.read ()); + } + + /** + * This method reads 16 unsigned bits into a Java int value from the stream. + * It operates by reading two bytes from the stream and converting them to + * a single Java int The two bytes are stored most + * significant byte first (i.e., "big endian") regardless of the native + * host byte ordering. + *

+ * As an example, if byte1 and byte2 + * represent the first and second byte read from the stream + * respectively, they will be transformed to an int in + * the following manner: + *

+ * (int)(((byte1 & 0xFF) << 8) + (byte2 & 0xFF)) + *

+ * The value returned is in the range of 0 to 65535. + *

+ * This method can read an unsigned short written by an object + * implementing the writeUnsignedShort() method in the + * DataOutput interface. + * + * @return The unsigned short value read as a Java int + * + * @exception EOFException If end of file is reached before reading the value + * @exception IOException If any other error occurs + * + * @see DataOutput#writeShort + */ + public final int readUnsignedShort () throws IOException + { + readFully (buf, 0, 2); + return convertToUnsignedShort (buf); + } + + /** + * This method reads a String from an input stream that + * is encoded in a modified UTF-8 format. This format has a leading + * two byte sequence that contains the remaining number of bytes to + * read. This two byte sequence is read using the + * readUnsignedShort() method of this interface. + *

+ * After the number of remaining bytes have been determined, these + * bytes are read an transformed into char values. + * These char values are encoded in the stream using + * either a one, two, or three byte format. The particular format + * in use can be determined by examining the first byte read. + *

+ * If the first byte has a high order bit of 0, then that character + * consists on only one byte. This character value consists of + * seven bits that are at positions 0 through 6 of the byte. As an + * example, if byte1 is the byte read from the stream, + * it would be converted to a char like so: + *

+ * (char)byte1 + *

+ * If the first byte has 110 as its high order bits, then the + * character consists of two bytes. The bits that make up the character + * value are in positions 0 through 4 of the first byte and bit positions + * 0 through 5 of the second byte. (The second byte should have + * 10 as its high order bits). These values are in most significant + * byte first (i.e., "big endian") order. + *

+ * As an example, if byte1 and byte2 are + * the first two bytes read respectively, and the high order bits of + * them match the patterns which indicate a two byte character + * encoding, then they would be converted to a Java + * char like so: + *

+ * (char)(((byte1 & 0x1F) << 6) | (byte2 & 0x3F)) + *

+ * If the first byte has a 1110 as its high order bits, then the + * character consists of three bytes. The bits that make up the character + * value are in positions 0 through 3 of the first byte and bit positions + * 0 through 5 of the other two bytes. (The second and third bytes should + * have 10 as their high order bits). These values are in most + * significant byte first (i.e., "big endian") order. + *

+ * As an example, if byte1 byte2 and + * byte3 are the three bytes read, and the high order + * bits of them match the patterns which indicate a three byte + * character encoding, then they would be converted to a Java + * char like so: + *

+ * (char)(((byte1 & 0x0F) << 12) | ((byte2 & 0x3F) << 6) | + * (byte3 & 0x3F)) + *

+ * Note that all characters are encoded in the method that requires + * the fewest number of bytes with the exception of the character + * with the value of \u0000 which is encoded as two + * bytes. This is a modification of the UTF standard used to + * prevent C language style NUL values from appearing + * in the byte stream. + *

+ * This method can read data that was written by an object implementing the + * writeUTF() method in DataOutput + * + * @return The String read + * + * @exception EOFException If end of file is reached before reading + * the String + * @exception UTFDataFormatException If the data is not in UTF-8 format + * @exception IOException If any other error occurs + * + * @see DataOutput#writeUTF + */ + public final String readUTF () throws IOException + { + return readUTF (this); + } + + /** + * This method reads a String encoded in UTF-8 format from the + * specified DataInput source. + * + * @param in The DataInput source to read from + * + * @return The String read from the source + * + * @exception IOException If an error occurs + * + * @see DataInput#readUTF + */ + public static final String readUTF(DataInput in) throws IOException + { + final int UTFlen = in.readUnsignedShort (); + + return readUTF(in, UTFlen); + } + + /** + * This method is similar to readUTF, but the + * UTF-8 byte length is in 64 bits. + * This method is not public. It is used by ObjectInputStream. + * + * @return The String read + * + * @exception EOFException If end of file is reached before reading + * the String + * @exception UTFDataFormatException If the data is not in UTF-8 format + * @exception IOException If any other error occurs + * + * @see DataOutput#writeUTFLong + */ + final String readUTFLong () throws IOException + { + long l = readLong (); + if (l > Integer.MAX_VALUE) + throw new IOException("The string length > Integer.MAX_VALUE"); + final int UTFlen = (int)l; + return readUTF (this, UTFlen); + } + + /** + * This method performs the main task of readUTF and + * readUTFLong. + * + * @param in The DataInput source to read from + * + * @param len The UTF-8 byte length of the String to be read + * + * @return The String read from the source + * + * @exception IOException If an error occurs + * + * @see DataInput#readUTF + */ + private static final String readUTF(DataInput in, int len) throws IOException + { + byte[] buf = new byte [len]; + + // This blocks until the entire string is available rather than + // doing partial processing on the bytes that are available and then + // blocking. An advantage of the latter is that Exceptions + // could be thrown earlier. The former is a bit cleaner. + in.readFully (buf, 0, len); + + return convertFromUTF (buf); + } + + /** + * This method attempts to skip and discard the specified number of bytes + * in the input stream. It may actually skip fewer bytes than requested. + * This method will not skip any bytes if passed a negative number of bytes + * to skip. + * + * @param n The requested number of bytes to skip. + * + * @return The requested number of bytes to skip. + * + * @exception IOException If an error occurs. + * @specnote The JDK docs claim that this returns the number of bytes + * actually skipped. The JCL claims that this method can throw an + * EOFException. Neither of these appear to be true in the JDK 1.3's + * implementation. This tries to implement the actual JDK behaviour. + */ + public final int skipBytes (int n) throws IOException + { + if (n <= 0) + return 0; + try + { + return (int) in.skip (n); + } + catch (EOFException x) + { + // do nothing. + } + return n; + } + + static boolean convertToBoolean (int b) throws EOFException + { + if (b < 0) + throw new EOFException (); + + return (b != 0); + } + + static byte convertToByte (int i) throws EOFException + { + if (i < 0) + throw new EOFException (); + + return (byte) i; + } + + static int convertToUnsignedByte (int i) throws EOFException + { + if (i < 0) + throw new EOFException (); + + return (i & 0xFF); + } + + static char convertToChar (byte[] buf) + { + return (char) ((buf [0] << 8) + | (buf [1] & 0xff)); + } + + static short convertToShort (byte[] buf) + { + return (short) ((buf [0] << 8) + | (buf [1] & 0xff)); + } + + static int convertToUnsignedShort (byte[] buf) + { + return (((buf [0] & 0xff) << 8) + | (buf [1] & 0xff)); + } + + static int convertToInt (byte[] buf) + { + return (((buf [0] & 0xff) << 24) + | ((buf [1] & 0xff) << 16) + | ((buf [2] & 0xff) << 8) + | (buf [3] & 0xff)); + } + + static long convertToLong (byte[] buf) + { + return (((long)(buf [0] & 0xff) << 56) | + ((long)(buf [1] & 0xff) << 48) | + ((long)(buf [2] & 0xff) << 40) | + ((long)(buf [3] & 0xff) << 32) | + ((long)(buf [4] & 0xff) << 24) | + ((long)(buf [5] & 0xff) << 16) | + ((long)(buf [6] & 0xff) << 8) | + ((long)(buf [7] & 0xff))); + } + + // FIXME: This method should be re-thought. I suspect we have multiple + // UTF-8 decoders floating around. We should use the standard charset + // converters, maybe and adding a direct call into one of the new + // NIO converters for a super-fast UTF8 decode. + static String convertFromUTF (byte[] buf) + throws EOFException, UTFDataFormatException + { + // Give StringBuffer an initial estimated size to avoid + // enlarge buffer frequently + CPStringBuilder strbuf = new CPStringBuilder (buf.length / 2 + 2); + + for (int i = 0; i < buf.length; ) + { + if ((buf [i] & 0x80) == 0) // bit pattern 0xxxxxxx + strbuf.append ((char) (buf [i++] & 0xFF)); + else if ((buf [i] & 0xE0) == 0xC0) // bit pattern 110xxxxx + { + if (i + 1 >= buf.length + || (buf [i + 1] & 0xC0) != 0x80) + throw new UTFDataFormatException (); + + strbuf.append((char) (((buf [i++] & 0x1F) << 6) + | (buf [i++] & 0x3F))); + } + else if ((buf [i] & 0xF0) == 0xE0) // bit pattern 1110xxxx + { + if (i + 2 >= buf.length + || (buf [i + 1] & 0xC0) != 0x80 + || (buf [i + 2] & 0xC0) != 0x80) + throw new UTFDataFormatException (); + + strbuf.append ((char) (((buf [i++] & 0x0F) << 12) + | ((buf [i++] & 0x3F) << 6) + | (buf [i++] & 0x3F))); + } + else // must be ((buf [i] & 0xF0) == 0xF0 || (buf [i] & 0xC0) == 0x80) + throw new UTFDataFormatException (); // bit patterns 1111xxxx or + // 10xxxxxx + } + + return strbuf.toString (); + } +} diff --git a/libjava/classpath/java/io/DataOutput.java b/libjava/classpath/java/io/DataOutput.java new file mode 100644 index 000000000..6eee4b702 --- /dev/null +++ b/libjava/classpath/java/io/DataOutput.java @@ -0,0 +1,325 @@ +/* DataOutput.java -- Interface for writing data from a stream + Copyright (C) 1998, 1999, 2001, 2003, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * Status: Complete to version 1.1. + */ + +/** + * This interface is implemented by classes that can wrte data to streams + * from Java primitive types. This data can subsequently be read back + * by classes implementing the DataInput interface. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + * + * @see DataInput + */ +public interface DataOutput +{ + /** + * This method writes a Java boolean value to an output stream. If + * value is true, a byte with the value of + * 1 will be written, otherwise a byte with the value of 0 will be + * written. + * + * The value written can be read using the readBoolean + * method in DataInput. + * + * @param value The boolean value to write + * + * @exception IOException If an error occurs + * + * @see DataInput#readBoolean + */ + void writeBoolean(boolean value) throws IOException; + + /** + * This method writes a Java byte value to an output stream. The + * byte to be written will be in the lowest 8 bits of the + * int value passed. + * + * The value written can be read using the readByte or + * readUnsignedByte methods in DataInput. + * + * @param value The int value to write + * + * @exception IOException If an error occurs + * + * @see DataInput#readByte + * @see DataInput#readUnsignedByte + */ + void writeByte(int value) throws IOException; + + /** + * This method writes a Java char value to an output stream. The + * char to be written will be in the lowest 16 bits of the int + * value passed. These bytes will be written "big endian". That is, + * with the high byte written first in the following manner: + *

+ * byte0 = (byte)((value & 0xFF00) >> 8);
+ * byte1 = (byte)(value & 0x00FF); + *

+ * + * The value written can be read using the readChar + * method in DataInput. + * + * @param value The char value to write + * + * @exception IOException If an error occurs + * + * @see DataInput#readChar + */ + void writeChar(int value) throws IOException; + + /** + * This method writes a Java short value to an output stream. The + * char to be written will be in the lowest 16 bits of the int + * value passed. These bytes will be written "big endian". That is, + * with the high byte written first in the following manner: + *

+ * byte0 = (byte)((value & 0xFF00) >> 8);
+ * byte1 = (byte)(value & 0x00FF); + *

+ * + * The value written can be read using the readShort and + * readUnsignedShort methods in DataInput. + * + * @param value The int value to write as a 16-bit value + * + * @exception IOException If an error occurs + * + * @see DataInput#readShort + * @see DataInput#readUnsignedShort + */ + void writeShort(int value) throws IOException; + + /** + * This method writes a Java int value to an output stream. The 4 bytes + * of the passed value will be written "big endian". That is, with + * the high byte written first in the following manner: + *

+ * byte0 = (byte)((value & 0xFF000000) >> 24);
+ * byte1 = (byte)((value & 0x00FF0000) >> 16);
+ * byte2 = (byte)((value & 0x0000FF00) >> 8);
+ * byte3 = (byte)(value & 0x000000FF); + *

+ * + * The value written can be read using the readInt + * method in DataInput. + * + * @param value The int value to write + * + * @exception IOException If an error occurs + * + * @see DataInput#readInt + */ + void writeInt(int value) throws IOException; + + /** + * This method writes a Java long value to an output stream. The 8 bytes + * of the passed value will be written "big endian". That is, with + * the high byte written first in the following manner: + *

+ * byte0 = (byte)((value & 0xFF00000000000000L) >> 56);
+ * byte1 = (byte)((value & 0x00FF000000000000L) >> 48);
+ * byte2 = (byte)((value & 0x0000FF0000000000L) >> 40);
+ * byte3 = (byte)((value & 0x000000FF00000000L) >> 32);
+ * byte4 = (byte)((value & 0x00000000FF000000L) >> 24);
+ * byte5 = (byte)((value & 0x0000000000FF0000L) >> 16);
+ * byte6 = (byte)((value & 0x000000000000FF00L) >> 8);
+ * byte7 = (byte)(value & 0x00000000000000FFL); + *

+ * + * The value written can be read using the readLong + * method in DataInput. + * + * @param value The long value to write + * + * @exception IOException If an error occurs + * + * @see DataInput#readLong + */ + void writeLong(long value) throws IOException; + + /** + * This method writes a Java float value to the stream. This + * value is written by first calling the method + * Float.floatToIntBits + * to retrieve an int representing the floating point number, + * then writing this int value to the stream exactly the same + * as the writeInt() method does. + * + * The value written can be read using the readFloat + * method in DataInput. + * + * @param value The float value to write + * + * @exception IOException If an error occurs + * + * @see #writeInt + * @see DataInput#readFloat + * @see Float#floatToIntBits + */ + void writeFloat(float value) throws IOException; + + /** + * This method writes a Java double value to the stream. This + * value is written by first calling the method + * Double.doubleToLongBits + * to retrieve an long representing the floating point number, + * then writing this long value to the stream exactly the same + * as the writeLong() method does. + * + * The value written can be read using the readDouble + * method in DataInput. + * + * @param value The double value to write + * + * @exception IOException If any other error occurs + * + * @see #writeLong + * @see DataInput#readDouble + * @see Double#doubleToLongBits + */ + void writeDouble(double value) throws IOException; + + /** + * This method writes all the bytes in a String out to the + * stream. One byte is written for each character in the + * String. + * The high eight bits of each character are discarded, thus this + * method is inappropriate for completely representing Unicode characters. + * + * @param value The String to write + * + * @exception IOException If an error occurs + */ + void writeBytes(String value) throws IOException; + + /** + * This method writes all the characters of a String to an + * output stream as an array of char's. Each character + * is written using the method specified in the writeChar + * method. + * + * @param value The String to write + * + * @exception IOException If an error occurs + * + * @see #writeChar(int) + */ + void writeChars(String value) throws IOException; + + /** + * This method writes a Java String to the stream in a modified + * UTF-8 format. First, two bytes are written to the stream indicating the + * number of bytes to follow. This is written in the form of a Java + * short value in the same manner used by the + * writeShort method. Note that this is the number of + * bytes in the + * encoded String not the String length. Next + * come the encoded characters. Each character in the String + * is encoded as either one, two or three bytes. For characters in the + * range of \u0001 to \u007F, one byte is used. + * The character + * value goes into bits 0-7 and bit eight is 0. For characters in the range + * of \u0080 to \u007FF, two bytes are used. Bits + * 6-10 of the character value are encoded bits 0-4 of the first byte, with + * the high bytes having a value of "110". Bits 0-5 of the character value + * are stored in bits 0-5 of the second byte, with the high bits set to + * "10". This type of encoding is also done for the null character + * \u0000. This eliminates any C style NUL character values + * in the output. All remaining characters are stored as three bytes. + * Bits 12-15 of the character value are stored in bits 0-3 of the first + * byte. The high bits of the first bytes are set to "1110". Bits 6-11 + * of the character value are stored in bits 0-5 of the second byte. The + * high bits of the second byte are set to "10". And bits 0-5 of the + * character value are stored in bits 0-5 of byte three, with the high bits + * of that byte set to "10". + * + * The value written can be read using the readUTF + * method in DataInput. + * + * @param value The String to write + * + * @exception IOException If an error occurs + * + * @see DataInput#readUTF + */ + void writeUTF(String value) throws IOException; + + /** + * This method writes an 8-bit value (passed into the method as a Java + * int) to an output stream. The low 8 bits of the + * passed value are written. + * + * @param value The byte to write to the output stream + * + * @exception IOException If an error occurs + */ + void write(int value) throws IOException; + + /** + * This method writes the raw byte array passed in to the output stream. + * + * @param buf The byte array to write + * + * @exception IOException If an error occurs + */ + void write(byte[] buf) throws IOException; + + /** + * This method writes raw bytes from the passed array buf + * starting + * offset bytes into the buffer. The number of bytes + * written will be exactly len. + * + * @param buf The buffer from which to write the data + * @param offset The offset into the buffer to start writing data from + * @param len The number of bytes to write from the buffer to the output + * stream + * + * @exception IOException If any other error occurs + */ + void write(byte[] buf, int offset, int len) throws IOException; + +} // interface DataOutput diff --git a/libjava/classpath/java/io/DataOutputStream.java b/libjava/classpath/java/io/DataOutputStream.java new file mode 100644 index 000000000..4837795c6 --- /dev/null +++ b/libjava/classpath/java/io/DataOutputStream.java @@ -0,0 +1,539 @@ +/* DataOutputStream.java -- Writes primitive Java datatypes to streams + Copyright (C) 1998, 2001, 2003, 2005, 2008 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * Status: Complete to version 1.1. + */ + +/** + * This class provides a mechanism for writing primitive Java datatypes + * to an OutputStream in a portable way. Data written to + * a stream using this class can be read back in using the + * DataInputStream class on any platform. + * + * @see DataInputStream + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + */ +public class DataOutputStream extends FilterOutputStream implements DataOutput +{ + /** + * This is the total number of bytes that have been written to the + * stream by this object instance. + */ + protected int written; + + /** + * Utf8 byte buffer, used by writeUTF() + */ + private byte[] buf; + + /** + * This method initializes an instance of DataOutputStream to + * write its data to the specified underlying OutputStream + * + * @param out The subordinate OutputStream to which this + * object will write + */ + public DataOutputStream (OutputStream out) + { + super (out); + written = 0; + } + + /** + * This method flushes any unwritten bytes to the underlying stream. + * + * @exception IOException If an error occurs. + */ + public void flush () throws IOException + { + out.flush(); + } + + /** + * This method returns the total number of bytes that have been written to + * the underlying output stream so far. This is the value of the + * written instance variable + * + * @return The number of bytes written to the stream. + */ + public final int size () + { + return written; + } + + /** + * This method writes the specified byte (passed as an int) + * to the underlying output stream. + * + * @param value The byte to write, passed as an int. + * + * @exception IOException If an error occurs. + */ + public synchronized void write (int value) throws IOException + { + out.write (value); + ++written; + } + + /** + * This method writes len bytes from the specified byte array + * buf starting at position offset into the + * buffer to the underlying output stream. + * + * @param buf The byte array to write from. + * @param offset The index into the byte array to start writing from. + * @param len The number of bytes to write. + * + * @exception IOException If an error occurs. + */ + public synchronized void write (byte[] buf, int offset, int len) + throws IOException + { + out.write(buf, offset, len); + written += len; + } + + /** + * This method writes a Java boolean value to an output stream. If + * value is true, a byte with the value of + * 1 will be written, otherwise a byte with the value of 0 will be + * written. + * + * The value written can be read using the readBoolean + * method in DataInput. + * + * @param value The boolean value to write to the stream + * + * @exception IOException If an error occurs + * + * @see DataInput#readBoolean + */ + public final void writeBoolean (boolean value) throws IOException + { + write (value ? 1 : 0); + } + + /** + * This method writes a Java byte value to an output stream. The + * byte to be written will be in the lowest 8 bits of the + * int value passed. + * + * The value written can be read using the readByte or + * readUnsignedByte methods in DataInput. + * + * @param value The byte to write to the stream, passed as + * the low eight bits of an int. + * + * @exception IOException If an error occurs + * + * @see DataInput#readByte + * @see DataInput#readUnsignedByte + */ + public final void writeByte (int value) throws IOException + { + write (value & 0xff); + } + + /** + * This method writes a Java short value to an output stream. The + * char to be written will be in the lowest 16 bits of the int + * value passed. These bytes will be written "big endian". That is, + * with the high byte written first in the following manner: + *

+ * byte0 = (byte)((value & 0xFF00) >> 8);
+ * byte1 = (byte)(value & 0x00FF); + *

+ * + * The value written can be read using the readShort and + * readUnsignedShort methods in DataInput. + * + * @param value The short value to write to the stream, + * passed as an int. + * + * @exception IOException If an error occurs + * + * @see DataInput#readShort + * @see DataInput#readUnsignedShort + */ + public final synchronized void writeShort (int value) throws IOException + { + write ((byte) (0xff & (value >> 8))); + write ((byte) (0xff & value)); + } + + /** + * This method writes a Java char value to an output stream. The + * char to be written will be in the lowest 16 bits of the int + * value passed. These bytes will be written "big endian". That is, + * with the high byte written first in the following manner: + *

+ * byte0 = (byte)((value & 0xFF00) >> 8);
+ * byte1 = (byte)(value & 0x00FF); + *

+ * + * The value written can be read using the readChar + * method in DataInput. + * + * @param value The char value to write, + * passed as an int. + * + * @exception IOException If an error occurs + * + * @see DataInput#readChar + */ + public final synchronized void writeChar (int value) throws IOException + { + write ((byte) (0xff & (value >> 8))); + write ((byte) (0xff & value)); + } + + /** + * This method writes a Java int value to an output stream. The 4 bytes + * of the passed value will be written "big endian". That is, with + * the high byte written first in the following manner: + *

+ * byte0 = (byte)((value & 0xFF000000) >> 24);
+ * byte1 = (byte)((value & 0x00FF0000) >> 16);
+ * byte2 = (byte)((value & 0x0000FF00) >> 8);
+ * byte3 = (byte)(value & 0x000000FF); + *

+ * + * The value written can be read using the readInt + * method in DataInput. + * + * @param value The int value to write to the stream + * + * @exception IOException If an error occurs + * + * @see DataInput#readInt + */ + public final synchronized void writeInt (int value) throws IOException + { + write ((byte) (0xff & (value >> 24))); + write ((byte) (0xff & (value >> 16))); + write ((byte) (0xff & (value >> 8))); + write ((byte) (0xff & value)); + } + + /** + * This method writes a Java long value to an output stream. The 8 bytes + * of the passed value will be written "big endian". That is, with + * the high byte written first in the following manner: + *

+ * byte0 = (byte)((value & 0xFF00000000000000L) >> 56);
+ * byte1 = (byte)((value & 0x00FF000000000000L) >> 48);
+ * byte2 = (byte)((value & 0x0000FF0000000000L) >> 40);
+ * byte3 = (byte)((value & 0x000000FF00000000L) >> 32);
+ * byte4 = (byte)((value & 0x00000000FF000000L) >> 24);
+ * byte5 = (byte)((value & 0x0000000000FF0000L) >> 16);
+ * byte6 = (byte)((value & 0x000000000000FF00L) >> 8);
+ * byte7 = (byte)(value & 0x00000000000000FFL); + *

+ * + * The value written can be read using the readLong + * method in DataInput. + * + * @param value The long value to write to the stream + * + * @exception IOException If an error occurs + * + * @see DataInput#readLong + */ + public final synchronized void writeLong (long value) throws IOException + { + write ((byte) (0xff & (value >> 56))); + write ((byte) (0xff & (value>> 48))); + write ((byte) (0xff & (value>> 40))); + write ((byte) (0xff & (value>> 32))); + write ((byte) (0xff & (value>> 24))); + write ((byte) (0xff & (value>> 16))); + write ((byte) (0xff & (value>> 8))); + write ((byte) (0xff & value)); + } + + /** + * This method writes a Java float value to the stream. This + * value is written by first calling the method + * Float.floatToIntBits + * to retrieve an int representing the floating point number, + * then writing this int value to the stream exactly the same + * as the writeInt() method does. + * + * The value written can be read using the readFloat + * method in DataInput. + * + * @param value The float value to write to the stream + * + * @exception IOException If an error occurs + * + * @see #writeInt(int) + * @see DataInput#readFloat + * @see Float#floatToIntBits + */ + public final void writeFloat (float value) throws IOException + { + writeInt (Float.floatToIntBits (value)); + } + + /** + * This method writes a Java double value to the stream. This + * value is written by first calling the method + * Double.doubleToLongBits + * to retrieve an long representing the floating point number, + * then writing this long value to the stream exactly the same + * as the writeLong() method does. + * + * The value written can be read using the readDouble + * method in DataInput. + * + * @param value The double value to write to the stream + * + * @exception IOException If an error occurs + * + * @see #writeLong(long) + * @see DataInput#readDouble + * @see Double#doubleToLongBits + */ + public final void writeDouble (double value) throws IOException + { + writeLong (Double.doubleToLongBits (value)); + } + + /** + * This method writes all the bytes in a String out to the + * stream. One byte is written for each character in the + * String. + * The high eight bits of each character are discarded, thus this + * method is inappropriate for completely representing Unicode characters. + * + * @param value The String to write to the stream + * + * @exception IOException If an error occurs + */ + public final void writeBytes (String value) throws IOException + { + int len = value.length(); + for (int i = 0; i < len; ++i) + writeByte (value.charAt(i)); + } + + /** + * This method writes all the characters of a String to an + * output stream as an array of char's. Each character + * is written using the method specified in the writeChar + * method. + * + * @param value The String to write to the stream + * + * @exception IOException If an error occurs + * + * @see #writeChar(char) + */ + public final void writeChars (String value) throws IOException + { + int len = value.length(); + for (int i = 0; i < len; ++i) + writeChar (value.charAt(i)); + } + + /** + * Calculate the length, in bytes, of a String in Utf8 format. + * This method is package-private so that ObjectOutputStream + * may use it. The return type is long so that a long string whose + * Utf8 byte count is 64 bit long may be handled. + * + * @param value The String to measure + * @param start String index at which to begin count + * @param sum Starting Utf8 byte count + * + */ + long getUTFlength(String value, int start, long sum) + { + int len = value.length(); + + for (int i = start; i < len; ++i) + { + char c = value.charAt(i); + if (c >= '\u0001' && c <= '\u007f') + sum += 1; + else if (c == '\u0000' || (c >= '\u0080' && c <= '\u07ff')) + sum += 2; + else + sum += 3; + } + + return sum; + } + + /** + * This method writes a Java String to the stream in a modified + * UTF-8 format. First, two bytes are written to the stream indicating the + * number of bytes to follow. Note that this is the number of bytes in the + * encoded String not the String length. Next + * come the encoded characters. Each character in the String + * is encoded as either one, two or three bytes. For characters in the + * range of \u0001 to <\u007F>, one byte is used. The character + * value goes into bits 0-7 and bit eight is 0. For characters in the range + * of \u0080 to \u007FF, two bytes are used. Bits + * 6-10 of the character value are encoded bits 0-4 of the first byte, with + * the high bytes having a value of "110". Bits 0-5 of the character value + * are stored in bits 0-5 of the second byte, with the high bits set to + * "10". This type of encoding is also done for the null character + * \u0000. This eliminates any C style NUL character values + * in the output. All remaining characters are stored as three bytes. + * Bits 12-15 of the character value are stored in bits 0-3 of the first + * byte. The high bits of the first bytes are set to "1110". Bits 6-11 + * of the character value are stored in bits 0-5 of the second byte. The + * high bits of the second byte are set to "10". And bits 0-5 of the + * character value are stored in bits 0-5 of byte three, with the high bits + * of that byte set to "10". + * + * The value written can be read using the readUTF + * method in DataInput. + * + * @param value The String to write to the output in UTF format + * + * @exception IOException If an error occurs + * + * @see DataInput#readUTF + */ + public final synchronized void writeUTF(String value) throws IOException + { + long l = getUTFlength(value, 0, 0); + if (l > 65535) + throw new UTFDataFormatException (); + writeUTFShort(value, (int)l); + } + + /** + * This method performs the main task of writeUTF. + * This method is package-private because ObjectOutputStream uses it. + * + * @param value The String to write to the output in UTF format + * + * @param bytelen The UTF-8 byte length of the String. When + * this method is called, the expected byte length must have been calculated + * by getUTFlength. + * + * @exception IOException If an error occurs + * + * @see DataInput#readUTF + */ + final synchronized void writeUTFShort(String value, int bytelen) + throws IOException + { + writeShort(bytelen); + writeUTFBytes(value); + } + + /** + * This method is similar to writeUTF, but it writes the + * UTF-8 byte length in 64 bits. + * This method is not public but ObjectOutputStream uses it. + * + * @param value The String to write to the output in UTF format + * + * @param bytelen The UTF-8 byte length of the String. When + * this method is called, the expected byte length must have been calculated + * by getUTFlength. + * + * @exception IOException If an error occurs + * + */ + final synchronized void writeUTFLong(String value, long bytelen) + throws IOException + { + writeLong(bytelen); + writeUTFBytes(value); + } + + /** + * This method performes the main task of writeUTF and + * WriteUTFLong, which is to write the UTF-8 byte + * sequence to the output. + * + * @param value The String to write to the output in UTF format + * + * @exception IOException If an error occurs + * + */ + private final synchronized void writeUTFBytes(String value) + throws IOException + { + int len = value.length(); + int i = 0; + int pos = 0; + + if (buf == null) + buf = new byte[512]; + + do + { + while (i < len && pos < buf.length - 3) + { + char c = value.charAt(i++); + if (c >= '\u0001' && c <= '\u007f') + buf[pos++] = (byte) c; + else if (c == '\u0000' || (c >= '\u0080' && c <= '\u07ff')) + { + buf[pos++] = (byte) (0xc0 | (0x1f & (c >> 6))); + buf[pos++] = (byte) (0x80 | (0x3f & c)); + } + else + { + // JSL says the first byte should be or'd with 0xc0, but + // that is a typo. Unicode says 0xe0, and that is what is + // consistent with DataInputStream. + buf[pos++] = (byte) (0xe0 | (0x0f & (c >> 12))); + buf[pos++] = (byte) (0x80 | (0x3f & (c >> 6))); + buf[pos++] = (byte) (0x80 | (0x3f & c)); + } + } + write(buf, 0, pos); + pos = 0; + } + while (i < len); + } + +} // class DataOutputStream diff --git a/libjava/classpath/java/io/DeleteFileHelper.java b/libjava/classpath/java/io/DeleteFileHelper.java new file mode 100644 index 000000000..a2b96bb41 --- /dev/null +++ b/libjava/classpath/java/io/DeleteFileHelper.java @@ -0,0 +1,106 @@ +/* DeleteFileHelper.java -- Helper class to delete files on VM exit + Copyright (C) 2004, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package java.io; + +import java.security.AccessController; +import java.security.PrivilegedAction; +import java.util.ArrayList; + +/** + * @author Guilhem Lavaux (guilhem@kaffe.org) + * @author Jeroen Frijters (jeroen@sumatra.nl) + * @author Michael Koch (konqueror@gmx.de) + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + */ +final class DeleteFileHelper extends Thread +{ + private static ArrayList filesToDelete; + + static synchronized void add(File file) + { + if (filesToDelete == null) + { + filesToDelete = new ArrayList(); + + AccessController.doPrivileged(new PrivilegedAction() + { + public Object run() + { + try + { + Runtime.getRuntime().addShutdownHook(new DeleteFileHelper()); + } + catch (IllegalStateException e) + { + // Shutdown is already in progress, so we can't + // register ours. + } + + return null; + } + }); + } + + filesToDelete.add(file); + } + + private static synchronized void deleteFiles() + { + for (File file : filesToDelete) + { + try + { + file.delete(); + } + catch (Exception e) + { + // Do nothing here. + } + } + } + + // Package-private to avoid a trampoline constructor. + DeleteFileHelper() + { + } + + public void run() + { + deleteFiles(); + } +} diff --git a/libjava/classpath/java/io/EOFException.java b/libjava/classpath/java/io/EOFException.java new file mode 100644 index 000000000..0d90a3f0f --- /dev/null +++ b/libjava/classpath/java/io/EOFException.java @@ -0,0 +1,76 @@ +/* EOFException.java -- unexpected end of file exception + Copyright (C) 1998, 1999, 2001, 2002, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This exception is thrown when the end of the file or stream was + * encountered unexpectedly. This is not the normal way that an EOF + * condition is reported; such as a special value like -1 being returned. + * However, certain types of streams expecting certain data in a certain + * format might reach EOF before reading their expected data pattern and + * thus throw this exception. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + * @status updated to 1.4 + */ +public class EOFException extends IOException +{ + /** + * Compatible with JDK 1.0+. + */ + private static final long serialVersionUID = 6433858223774886977L; + + /** + * Create an exception without a descriptive error message. + */ + public EOFException() + { + } + + /** + * Create an exception with a descriptive error message. + * + * @param message the descriptive error message + */ + public EOFException(String message) + { + super(message); + } +} // class EOFException diff --git a/libjava/classpath/java/io/Externalizable.java b/libjava/classpath/java/io/Externalizable.java new file mode 100644 index 000000000..7399dab3b --- /dev/null +++ b/libjava/classpath/java/io/Externalizable.java @@ -0,0 +1,107 @@ +/* Externalizable.java -- Interface for saving and restoring object data + Copyright (C) 1998 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This interface provides a way that classes can completely control how + * the data of their object instances are written and read to and from + * streams. It has two methods which are used to write the data to a stream + * and to read the data from a stream. The read method must read the data + * in exactly the way it was written by the write method. + *

+ * Note that classes which implement this interface must take into account + * that all superclass data must also be written to the stream as well. + * The class implementing this interface must figure out how to make that + * happen. + *

+ * This interface can be used to provide object persistence. When an + * object is to be stored externally, the writeExternal method is + * called to save state. When the object is restored, an instance is + * created using the default no-argument constructor and the + * readExternal method is used to restore the state. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + */ +public interface Externalizable extends Serializable +{ + /** + * This method restores an object's state by reading in the instance data + * for the object from the passed in stream. Note that this stream is not + * a subclass of InputStream, but rather is a class that + * implements + * the ObjectInput interface. That interface provides a + * mechanism for + * reading in Java data types from a stream. + *

+ * Note that this method must be compatible with writeExternal. + * It must read back the exact same types that were written by that + * method in the exact order they were written. + *

+ * If this method needs to read back an object instance, then the class + * for that object must be found and loaded. If that operation fails, + * then this method throws a ClassNotFoundException + * + * @param in An ObjectInput instance for reading in the object + * state + * + * @exception ClassNotFoundException If the class of an object being + * restored cannot be found + * @exception IOException If any other error occurs + */ + void readExternal(ObjectInput in) + throws ClassNotFoundException, IOException; + + /** + * This method is responsible for writing the instance data of an object + * to the passed in stream. Note that this stream is not a subclass of + * OutputStream, but rather is a class that implements the + * ObjectOutput interface. That interface provides a + * number of methods + * for writing Java data values to a stream. + *

+ * Not that the implementation of this method must be coordinated with + * the implementation of readExternal. + * + * @param out An ObjectOutput instance for writing the + * object state + * + * @exception IOException If an error occurs + */ + void writeExternal(ObjectOutput out) throws IOException; +} diff --git a/libjava/classpath/java/io/File.java b/libjava/classpath/java/io/File.java new file mode 100644 index 000000000..4f670e147 --- /dev/null +++ b/libjava/classpath/java/io/File.java @@ -0,0 +1,1605 @@ +/* File.java -- Class representing a file on disk + Copyright (C) 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006 + Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +import gnu.classpath.SystemProperties; + +import gnu.java.lang.CPStringBuilder; + +import java.net.MalformedURLException; +import java.net.URI; +import java.net.URISyntaxException; +import java.net.URL; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * Status: Complete to version 1.3. + */ + +/** + * This class represents a file or directory on a local disk. It provides + * facilities for dealing with a variety of systems that use various + * types of path separators ("/" versus "\", for example). It also + * contains method useful for creating and deleting files and directories. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + */ +public class File implements Serializable, Comparable +{ + private static final long serialVersionUID = 301077366599181567L; + + /** + * This is the path separator string for the current host. This field + * contains the value of the file.separator system property. + * An example separator string would be "/" on the GNU system. + */ + public static final String separator = SystemProperties.getProperty("file.separator"); + private static final String dupSeparator = separator + separator; + + /** + * This is the first character of the file separator string. On many + * hosts (for example, on the GNU system), this represents the entire + * separator string. The complete separator string is obtained from the + * file.separatorsystem property. + */ + public static final char separatorChar = separator.charAt(0); + + /** + * This is the string that is used to separate the host name from the + * path name in paths that include the host name. It is the value of + * the path.separator system property. + */ + public static final String pathSeparator + = SystemProperties.getProperty("path.separator"); + + /** + * This is the first character of the string used to separate the host name + * from the path name in paths that include a host. The separator string + * is taken from the path.separator system property. + */ + public static final char pathSeparatorChar = pathSeparator.charAt(0); + + /** + * This is the path to the file set when the object is created. It + * may be an absolute or relative path name. + */ + private String path; + + + /** + * The time (millisecond), when the last temporary file was created. + */ + private static long last_tmp; + + /** + * The number of files, created during the current millisecond. + */ + private static int n_created; + + /** + * This method tests whether or not the current thread is allowed to + * to read the file pointed to by this object. This will be true if and + * and only if 1) the file exists and 2) the SecurityManager + * (if any) allows access to the file via it's checkRead + * method 3) the file is readable. + * + * @return true if reading is allowed, + * false otherwise + * + * @exception SecurityException If the SecurityManager + * does not allow access to the file + */ + public boolean canRead() + { + // Test for existence. This also does the SecurityManager check + if (!exists()) + return false; + + return VMFile.canRead(path); + } + + /** + * This method test whether or not the current thread is allowed to + * write to this object. This will be true if and only if 1) The + * SecurityManager (if any) allows write access to the + * file and 2) The file exists and 3) The file is writable. To determine + * whether or not a non-existent file can be created, check the parent + * directory for write access. + * + * @return true if writing is allowed, false + * otherwise + * + * @exception SecurityException If the SecurityManager + * does not allow access to the file + */ + public boolean canWrite() + { + // First do a SecurityCheck before doing anything else. + checkWrite(); + + // Test for existence. This is required by the spec + if (! VMFile.exists(path)) + return false; + + if (VMFile.isDirectory(path)) + return VMFile.canWriteDirectory(path); + else + return VMFile.canWrite(path); + } + + /** + * This method tests whether or not the current thread is allowed to + * to execute the file pointed to by this object. This will be true if and + * and only if 1) the file exists and 2) the SecurityManager + * (if any) allows access to the file via it's checkExec + * method 3) the file is executable. + * + * @return true if execution is allowed, + * false otherwise + * + * @exception SecurityException If the SecurityManager + * does not allow access to the file + */ + public boolean canExecute() + { + if (!VMFile.exists(path)) + return false; + + checkExec(); + + return VMFile.canExecute(path); + } + + /** + * This method creates a new file of zero length with the same name as + * the path of this File object if an only if that file + * does not already exist. + *

+ * A SecurityManager.checkWrite check is done prior + * to performing this action. + * + * @return true if the file was created, false if + * the file alread existed. + * + * @exception IOException If an I/O error occurs + * @exception SecurityException If the SecurityManager will + * not allow this operation to be performed. + * + * @since 1.2 + */ + public boolean createNewFile() throws IOException + { + checkWrite(); + return VMFile.create(path); + } + /** + * This method deletes the file represented by this object. If this file + * is a directory, it must be empty in order for the delete to succeed. + * + * @return true if the file was deleted, false + * otherwise + * + * @exception SecurityException If deleting of the file is not allowed + */ + public synchronized boolean delete() + { + SecurityManager s = System.getSecurityManager(); + + if (s != null) + s.checkDelete(path); + + return VMFile.delete(path); + } + + /** + * This method tests two File objects for equality by + * comparing the path of the specified File against the path + * of this object. The two objects are equal if an only if 1) The + * argument is not null 2) The argument is a File object and + * 3) The path of the Fileargument is equal to the path + * of this object. + *

+ * The paths of the files are determined by calling the + * getPath() + * method on each object. + * + * @return true if the two objects are equal, + * false otherwise. + */ + public boolean equals(Object obj) + { + if (! (obj instanceof File)) + return false; + + File other = (File) obj; + + if (VMFile.IS_CASE_SENSITIVE) + return path.equals(other.path); + else + return path.equalsIgnoreCase(other.path); + } + + /** + * This method tests whether or not the file represented by the object + * actually exists on the filesystem. + * + * @return true if the file exists, falseotherwise. + * + * @exception SecurityException If reading of the file is not permitted + */ + public boolean exists() + { + checkRead(); + return VMFile.exists(path); + } + + /** + * This method initializes a new File object to represent + * a file with the specified path. + * + * @param name The path name of the file + */ + public File(String name) + { + path = normalizePath (name); + } + + // Remove duplicate and redundant separator characters. + private String normalizePath(String p) + { + // On Windows, convert any '/' to '\'. This appears to be the same logic + // that Sun's Win32 Java performs. + if (separatorChar == '\\') + { + p = p.replace ('/', '\\'); + // We have to special case the "\c:" prefix. + if (p.length() > 2 && p.charAt(0) == '\\' && + ((p.charAt(1) >= 'a' && p.charAt(1) <= 'z') || + (p.charAt(1) >= 'A' && p.charAt(1) <= 'Z')) && + p.charAt(2) == ':') + p = p.substring(1); + } + + int dupIndex = p.indexOf(dupSeparator); + int plen = p.length(); + + // Special case: permit Windows UNC path prefix. + if (dupSeparator.equals("\\\\") && dupIndex == 0) + dupIndex = p.indexOf(dupSeparator, 1); + + if (dupIndex == -1) + { + // Ignore trailing separator (though on Windows "a:\", for + // example, is a valid and minimal path). + if (plen > 1 && p.charAt (plen - 1) == separatorChar) + { + if (! (separatorChar == '\\' && ((plen == 3 && p.charAt(1) == ':') + || (plen == 2 && p.charAt(0) == separatorChar)))) + return p.substring (0, plen - 1); + } + else + return p; + } + + CPStringBuilder newpath = new CPStringBuilder(plen); + int last = 0; + while (dupIndex != -1) + { + newpath.append(p.substring(last, dupIndex)); + // Ignore the duplicate path characters. + while (p.charAt(dupIndex) == separatorChar) + { + dupIndex++; + if (dupIndex == plen) + { + if ((separatorChar == '\\' + && newpath.length() == 2 + && newpath.charAt(1) == ':') + || (separatorChar != '\\' && newpath.length() == 0)) + { + newpath.append(separatorChar); + } + return newpath.toString(); + } + } + newpath.append(separatorChar); + last = dupIndex; + dupIndex = p.indexOf(dupSeparator, last); + } + + // Again, ignore possible trailing separator (except special cases + // like "a:\" on Windows). + int end; + if (plen > 1 && p.charAt (plen - 1) == separatorChar) + { + if (separatorChar == '\\' + && ((plen == 3 && p.charAt(1) == ':') + || (plen == 2 && p.charAt(0) == separatorChar))) + end = plen; + else + end = plen - 1; + } + else + end = plen; + newpath.append(p.substring(last, end)); + + return newpath.toString(); + } + + /** + * This method initializes a new File object to represent + * a file in the specified named directory. The path name to the file + * will be the directory name plus the separator string plus the file + * name. If the directory path name ends in the separator string, another + * separator string will still be appended. + * + * @param dirPath The path to the directory the file resides in + * @param name The name of the file + */ + public File(String dirPath, String name) + { + if (name == null) + throw new NullPointerException(); + if (dirPath != null) + { + if (dirPath.length() > 0) + { + // Try to be smart about the number of separator characters. + if (dirPath.charAt(dirPath.length() - 1) == separatorChar + || name.length() == 0) + path = normalizePath(dirPath + name); + else + path = normalizePath(dirPath + separatorChar + name); + } + else + { + // If dirPath is empty, use a system dependant + // default prefix. + // Note that the leading separators in name have + // to be chopped off, to prevent them forming + // a UNC prefix on Windows. + if (separatorChar == '\\' /* TODO use ON_WINDOWS */) + { + int skip = 0; + while(name.length() > skip + && (name.charAt(skip) == separatorChar + || name.charAt(skip) == '/')) + { + skip++; + } + name = name.substring(skip); + } + path = normalizePath(separatorChar + name); + } + } + else + path = normalizePath(name); + } + + /** + * This method initializes a new File object to represent + * a file in the specified directory. If the directory + * argument is null, the file is assumed to be in the + * current directory as specified by the user.dir system + * property + * + * @param directory The directory this file resides in + * @param name The name of the file + */ + public File(File directory, String name) + { + this (directory == null ? null : directory.path, name); + } + + /** + * This method initializes a new File object to represent + * a file corresponding to the specified file: protocol URI. + * + * @param uri The URI + * @throws IllegalArgumentException if the URI is not hierarchical + */ + public File(URI uri) + { + if (uri == null) + throw new NullPointerException("uri is null"); + + if (!uri.getScheme().equals("file")) + throw new IllegalArgumentException("invalid uri protocol"); + + String name = uri.getPath(); + if (name == null) + throw new IllegalArgumentException("URI \"" + uri + + "\" is not hierarchical"); + path = normalizePath(name); + } + + /** + * This method returns the path of this file as an absolute path name. + * If the path name is already absolute, then it is returned. Otherwise + * the value returned is the current directory plus the separatory + * string plus the path of the file. The current directory is determined + * from the user.dir system property. + * + * @return The absolute path of this file + */ + public String getAbsolutePath() + { + if (isAbsolute()) + return path; + else + return VMFile.getAbsolutePath(path); + } + + /** + * This method returns a File object representing the + * absolute path of this object. + * + * @return A File with the absolute path of the object. + * + * @since 1.2 + */ + public File getAbsoluteFile() + { + return new File(getAbsolutePath()); + } + + /** + * This method returns a canonical representation of the pathname of + * this file. The actual form of the canonical representation is + * system-dependent. On the GNU system, conversion to canonical + * form involves the removal of redundant separators, references to + * "." and "..", and symbolic links. + *

+ * Note that this method, unlike the other methods which return path + * names, can throw an IOException. This is because native method + * might be required in order to resolve the canonical path + * + * @exception IOException If an error occurs + */ + public String getCanonicalPath() throws IOException + { + // On Windows, getAbsolutePath might end up calling us, so we + // have to special case that call to avoid infinite recursion. + if (separatorChar == '\\' && path.length() == 2 && + ((path.charAt(0) >= 'a' && path.charAt(0) <= 'z') || + (path.charAt(0) >= 'A' && path.charAt(0) <= 'Z')) && + path.charAt(1) == ':') + { + return VMFile.toCanonicalForm(path); + } + // Call getAbsolutePath first to make sure that we do the + // current directory handling, because the native code + // may have a different idea of the current directory. + return VMFile.toCanonicalForm(getAbsolutePath()); + } + + /** + * This method returns a File object representing the + * canonical path of this object. + * + * @return A File instance representing the canonical path of + * this object. + * + * @exception IOException If an error occurs. + * + * @since 1.2 + */ + public File getCanonicalFile() throws IOException + { + return new File(getCanonicalPath()); + } + + /** + * This method returns the name of the file. This is everything in the + * complete path of the file after the last instance of the separator + * string. + * + * @return The file name + */ + public String getName() + { + return VMFile.getName(path); + } + + /** + * This method returns a String the represents this file's + * parent. null is returned if the file has no parent. The + * parent is determined via a simple operation which removes the name + * after the last file separator character, as determined by the platform. + * + * @return The parent directory of this file + */ + public String getParent() + { + String prefix = null; + int nameSeqIndex = 0; + + if (path.equals("")) + return null; + + // The "prefix", if present, is the leading "/" on UNIX and + // either the drive specifier (e.g. "C:") or the leading "\\" + // of a UNC network path on Windows. + if (separatorChar == '/' && path.charAt (0) == '/') + { + prefix = "/"; + nameSeqIndex = 1; + } + else if (separatorChar == '\\' && path.length() > 1) + { + if ((path.charAt (0) == '\\' && path.charAt (1) == '\\') + || (((path.charAt (0) >= 'a' && path.charAt (0) <= 'z') + || (path.charAt (0) >= 'A' && path.charAt (0) <= 'Z')) + && path.charAt (1) == ':')) + { + prefix = path.substring (0, 2); + nameSeqIndex = 2; + } + } + + // According to the JDK docs, the returned parent path is the + // portion of the name sequence before the last separator + // character, if found, prefixed by the prefix, otherwise null. + if (nameSeqIndex < path.length()) + { + String nameSeq = path.substring (nameSeqIndex, path.length()); + int last = nameSeq.lastIndexOf (separatorChar); + if (last == -1) + return prefix; + else if (last == (nameSeq.length() - 1)) + // Note: The path would not have a trailing separator + // except for cases like "C:\" on Windows (see + // normalizePath( )), where Sun's JRE 1.4 returns null. + return null; + else if (last == 0) + last++; + + if (prefix != null) + return prefix + nameSeq.substring (0, last); + else + return nameSeq.substring (0, last); + } + else + // Sun's JRE 1.4 returns null if the prefix is the only + // component of the path - so "/" gives null on UNIX and + // "C:", "\\", etc. return null on Windows. + return null; + } + + /** + * This method returns a File object representing the parent + * file of this one. + * + * @return a File for the parent of this object. + * null + * will be returned if this object does not have a parent. + * + * @since 1.2 + */ + public File getParentFile() + { + String parent = getParent(); + return parent != null ? new File(parent) : null; + } + + /** + * Returns the path name that represents this file. May be a relative + * or an absolute path name + * + * @return The pathname of this file + */ + public String getPath() + { + return path; + } + + /** + * This method returns a hash code representing this file. It is the + * hash code of the path of this file (as returned by getPath()) + * exclusived or-ed with the value 1234321. + * + * @return The hash code for this object + */ + public int hashCode() + { + if (VMFile.IS_CASE_SENSITIVE) + return path.hashCode() ^ 1234321; + else + return path.toLowerCase().hashCode() ^ 1234321; + } + + /** + * This method returns true if this object represents an absolute file + * path and false if it does not. The definition of an absolute path varies + * by system. As an example, on GNU systems, a path is absolute if it starts + * with a "/". + * + * @return true if this object represents an absolute + * file name, false otherwise. + */ + public boolean isAbsolute() + { + return VMFile.isAbsolute(path); + } + + /** + * This method tests whether or not the file represented by this object + * is a directory. In order for this method to return true, + * the file represented by this object must exist and be a directory. + * + * @return true if this file is a directory, false + * otherwise + * + * @exception SecurityException If reading of the file is not permitted + */ + public boolean isDirectory() + { + checkRead(); + return VMFile.isDirectory(path); + } + + /** + * This method tests whether or not the file represented by this object + * is a "plain" file. A file is a plain file if and only if it 1) Exists, + * 2) Is not a directory or other type of special file. + * + * @return true if this is a plain file, false + * otherwise + * + * @exception SecurityException If reading of the file is not permitted + */ + public boolean isFile() + { + checkRead(); + return VMFile.isFile(path); + } + + /** + * This method tests whether or not this file represents a "hidden" file. + * On GNU systems, a file is hidden if its name begins with a "." + * character. Files with these names are traditionally not shown with + * directory listing tools. + * + * @return true if the file is hidden, false + * otherwise. + * + * @since 1.2 + */ + public boolean isHidden() + { + return VMFile.isHidden(path); + } + + /** + * This method returns the last modification time of this file. The + * time value returned is an abstract value that should not be interpreted + * as a specified time value. It is only useful for comparing to other + * such time values returned on the same system. In that case, the larger + * value indicates a more recent modification time. + *

+ * If the file does not exist, then a value of 0 is returned. + * + * @return The last modification time of the file + * + * @exception SecurityException If reading of the file is not permitted + */ + public long lastModified() + { + checkRead(); + return VMFile.lastModified(path); + } + + /** + * This method returns the length of the file represented by this object, + * or 0 if the specified file does not exist. + * + * @return The length of the file + * + * @exception SecurityException If reading of the file is not permitted + */ + public long length() + { + checkRead(); + return VMFile.length(path); + } + + /** + * This method returns a array of String's representing the + * list of files is then directory represented by this object. If this + * object represents a non-directory file or a non-existent file, then + * null is returned. The list of files will not contain + * any names such as "." or ".." which indicate the current or parent + * directory. Also, the names are not guaranteed to be sorted. + *

+ * In this form of the list() method, a filter is specified + * that allows the caller to control which files are returned in the + * list. The FilenameFilter specified is called for each + * file returned to determine whether or not that file should be included + * in the list. + *

+ * A SecurityManager check is made prior to reading the + * directory. If read access to the directory is denied, an exception + * will be thrown. + * + * @param filter An object which will identify files to exclude from + * the directory listing. + * + * @return An array of files in the directory, or null + * if this object does not represent a valid directory. + * + * @exception SecurityException If read access is not allowed to the + * directory by the SecurityManager + */ + public String[] list(FilenameFilter filter) + { + checkRead(); + + if (!exists() || !isDirectory()) + return null; + + // Get the list of files + String files[] = VMFile.list(path); + + // Check if an error occured in listInternal(). + // This is an unreadable directory, pretend there is nothing inside. + if (files == null) + return new String[0]; + + if (filter == null) + return files; + + // Apply the filter + int count = 0; + for (int i = 0; i < files.length; i++) + { + if (filter.accept(this, files[i])) + ++count; + else + files[i] = null; + } + + String[] retfiles = new String[count]; + count = 0; + for (int i = 0; i < files.length; i++) + if (files[i] != null) + retfiles[count++] = files[i]; + + return retfiles; + } + + /** + * This method returns a array of String's representing the + * list of files is then directory represented by this object. If this + * object represents a non-directory file or a non-existent file, then + * null is returned. The list of files will not contain + * any names such as "." or ".." which indicate the current or parent + * directory. Also, the names are not guaranteed to be sorted. + *

+ * A SecurityManager check is made prior to reading the + * directory. If read access to the directory is denied, an exception + * will be thrown. + * + * @return An array of files in the directory, or null if + * this object does not represent a valid directory. + * + * @exception SecurityException If read access is not allowed to the + * directory by the SecurityManager + */ + public String[] list() + { + return list(null); + } + + /** + * This method returns an array of File objects representing + * all the files in the directory represented by this object. If this + * object does not represent a directory, null is returned. + * Each of the returned File object is constructed with this + * object as its parent. + *

+ * A SecurityManager check is made prior to reading the + * directory. If read access to the directory is denied, an exception + * will be thrown. + * + * @return An array of File objects for this directory. + * + * @exception SecurityException If the SecurityManager denies + * access to this directory. + * + * @since 1.2 + */ + public File[] listFiles() + { + return listFiles((FilenameFilter) null); + } + + /** + * This method returns an array of File objects representing + * all the files in the directory represented by this object. If this + * object does not represent a directory, null is returned. + * Each of the returned File object is constructed with this + * object as its parent. + *

+ * In this form of the listFiles() method, a filter is specified + * that allows the caller to control which files are returned in the + * list. The FilenameFilter specified is called for each + * file returned to determine whether or not that file should be included + * in the list. + *

+ * A SecurityManager check is made prior to reading the + * directory. If read access to the directory is denied, an exception + * will be thrown. + * + * @return An array of File objects for this directory. + * + * @exception SecurityException If the SecurityManager denies + * access to this directory. + * + * @since 1.2 + */ + public File[] listFiles(FilenameFilter filter) + { + String[] filelist = list(filter); + + if (filelist == null) + return null; + + File[] fobjlist = new File [filelist.length]; + + for (int i = 0; i < filelist.length; i++) + fobjlist [i] = new File(this, filelist [i]); + + return fobjlist; + } + + /** + * This method returns an array of File objects representing + * all the files in the directory represented by this object. If this + * object does not represent a directory, null is returned. + * Each of the returned File object is constructed with this + * object as its parent. + *

+ * In this form of the listFiles() method, a filter is specified + * that allows the caller to control which files are returned in the + * list. The FileFilter specified is called for each + * file returned to determine whether or not that file should be included + * in the list. + *

+ * A SecurityManager check is made prior to reading the + * directory. If read access to the directory is denied, an exception + * will be thrown. + * + * @return An array of File objects for this directory. + * + * @exception SecurityException If the SecurityManager denies + * access to this directory. + * + * @since 1.2 + */ + public File[] listFiles(FileFilter filter) + { + File[] fobjlist = listFiles((FilenameFilter) null); + + if (fobjlist == null) + return null; + + if (filter == null) + return fobjlist; + + int count = 0; + for (int i = 0; i < fobjlist.length; i++) + if (filter.accept(fobjlist[i]) == true) + ++count; + + File[] final_list = new File[count]; + count = 0; + for (int i = 0; i < fobjlist.length; i++) + if (filter.accept(fobjlist[i]) == true) + { + final_list[count] = fobjlist[i]; + ++count; + } + + return final_list; + } + + /** + * This method returns a String that is the path name of the + * file as returned by getPath. + * + * @return A String representation of this file + */ + public String toString() + { + return path; + } + + /** + * @return A URI for this object. + */ + public URI toURI() + { + String abspath = getAbsolutePath(); + + if (isDirectory() || path.equals("")) + abspath = abspath + separatorChar; + + if (separatorChar == '\\') + abspath = separatorChar + abspath; + + try + { + return new URI("file", null, null, -1, + abspath.replace(separatorChar, '/'), + null, null); + } + catch (URISyntaxException use) + { + // Can't happen. + throw (InternalError) new InternalError("Unconvertible file: " + + this).initCause(use); + } + } + + /** + * This method returns a URL with the file: + * protocol that represents this file. The exact form of this URL is + * system dependent. + * + * @return A URL for this object. + * + * @exception MalformedURLException If the URL cannot be created + * successfully. + */ + public URL toURL() throws MalformedURLException + { + return VMFile.toURL(this); + } + + + /** + * This method creates a directory for the path represented by this object. + * + * @return true if the directory was created, + * false otherwise + * + * @exception SecurityException If write access is not allowed to this file + */ + public boolean mkdir() + { + checkWrite(); + return VMFile.mkdir(path); + } + + /** + * This method creates a directory for the path represented by this file. + * It will also create any intervening parent directories if necessary. + * + * @return true if the directory was created, + * false otherwise + * + * @exception SecurityException If write access is not allowed to this file + */ + public boolean mkdirs() + { + String parent = getParent(); + if (parent == null) + { + return mkdir(); + } + + File f = new File(parent); + if (!f.exists()) + { + boolean rc = f.mkdirs(); + if (rc == false) + return false; + } + + return mkdir(); + } + + /** + * This method creates a temporary file in the specified directory. If + * the directory name is null, then this method uses the system temporary + * directory. The files created are guaranteed not to currently exist and + * the same file name will never be used twice in the same virtual + * machine instance. + * The system temporary directory is determined by examinging the + * java.io.tmpdir system property. + *

+ * The prefix parameter is a sequence of at least three + * characters that are used as the start of the generated filename. The + * suffix parameter is a sequence of characters that is used + * to terminate the file name. This parameter may be null + * and if it is, the suffix defaults to ".tmp". + *

+ * If a SecurityManager exists, then its checkWrite + * method is used to verify that this operation is permitted. + * + * @param prefix The character prefix to use in generating the path name. + * @param suffix The character suffix to use in generating the path name. + * @param directory The directory to create the file in, or + * null for the default temporary directory + * + * @exception IllegalArgumentException If the patterns is not valid + * @exception SecurityException If there is no permission to perform + * this operation + * @exception IOException If an error occurs + * + * @since 1.2 + */ + public static synchronized File createTempFile(String prefix, String suffix, + File directory) + throws IOException + { + // Grab the system temp directory if necessary + if (directory == null) + { + String dirname = System.getProperty("java.io.tmpdir"); + if (dirname == null) + throw new IOException("Cannot determine system temporary directory"); + + directory = new File(dirname); + if (! VMFile.exists(directory.path)) + throw new IOException("System temporary directory " + + directory.getName() + " does not exist."); + if (! VMFile.isDirectory(directory.path)) + throw new IOException("System temporary directory " + + directory.getName() + + " is not really a directory."); + } + + // Check if prefix is at least 3 characters long + if (prefix.length() < 3) + throw new IllegalArgumentException("Prefix too short: " + prefix); + + // Set default value of suffix + if (suffix == null) + suffix = ".tmp"; + + // Now identify a file name and make sure it doesn't exist. + File file; + if (!VMFile.IS_DOS_8_3) + { + do + { + long now = System.currentTimeMillis(); + if (now > last_tmp) + { + // The last temporary file was created more than 1 ms ago. + last_tmp = now; + n_created = 0; + } + else + n_created++; + + String name = Long.toHexString(now); + if (n_created > 0) + name += '_'+Integer.toHexString(n_created); + String filename = prefix + name + suffix; + file = new File(directory, filename); + } + while (VMFile.exists(file.path)); + } + else + { + // make sure prefix is not longer than 7 characters + if (prefix.length() >= 8) + throw new IllegalArgumentException("Prefix too long: " + prefix + "(valid length 3..7)"); + + long mask = 0x000000ffffFFFFL >> (prefix.length() * 4); + do + { + int n = (int) (System.currentTimeMillis() & mask); + String filename = prefix + java.lang.Integer.toHexString(n) + suffix; + file = new File(directory, filename); + } + while (VMFile.exists(file.path)); + } + + // Verify that we are allowed to create this file + SecurityManager sm = System.getSecurityManager(); + if (sm != null) + sm.checkWrite(file.getAbsolutePath()); + + // Now create the file and return our file object + // XXX - FIXME race condition. + VMFile.create(file.getAbsolutePath()); + return file; + } + + /** + * This method sets the owner's read permission for the File represented by + * this object. + * + * It is the same as calling setReadable(readable, true). + * + * @param readable true to set read permission, + * false to unset the read permission. + * @return true if the file permissions are changed, + * false otherwise. + * @exception SecurityException If write access of the file is not permitted. + * @see #setReadable(boolean, boolean) + * @since 1.6 + */ + public boolean setReadable(boolean readable) + { + return setReadable(readable, true); + } + + /** + * This method sets the read permissions for the File represented by + * this object. + * + * If ownerOnly is set to true then only the + * read permission bit for the owner of the file is changed. + * + * If ownerOnly is set to false, the file + * permissions are changed so that the file can be read by everyone. + * + * On unix like systems this sets the user, group + * and other read bits and is equal to call + * chmod a+r on the file. + * + * @param readable true to set read permission, + * false to unset the read permission. + * @param ownerOnly true to set read permission + * for owner only, false for all. + * @return true if the file permissions are changed, + * false otherwise. + * @exception SecurityException If write access of the file is not permitted. + * @see #setReadable(boolean) + * @since 1.6 + */ + public boolean setReadable(boolean readable, boolean ownerOnly) + { + checkWrite(); + return VMFile.setReadable(path, readable, ownerOnly); + } + + /** + * This method sets the owner's write permission for the File represented by + * this object. + * + * It is the same as calling setWritable(readable, true). + * + * @param writable true to set write permission, + * false to unset write permission. + * @return true if the file permissions are changed, + * false otherwise. + * @exception SecurityException If write access of the file is not permitted. + * @see #setWritable(boolean, boolean) + * @since 1.6 + */ + public boolean setWritable(boolean writable) + { + return setWritable(writable, true); + } + + /** + * This method sets the write permissions for the File represented by + * this object. + * + * If ownerOnly is set to true then only the + * write permission bit for the owner of the file is changed. + * + * If ownerOnly is set to false, the file + * permissions are changed so that the file can be written by everyone. + * + * On unix like systems this set the user, group + * and other write bits and is equal to call + * chmod a+w on the file. + * + * @param writable true to set write permission, + * false to unset write permission. + * @param ownerOnly true to set write permission + * for owner only, false for all. + * @return true if the file permissions are changed, + * false otherwise. + * @exception SecurityException If write access of the file is not permitted. + * @see #setWritable(boolean) + * @since 1.6 + */ + public boolean setWritable(boolean writable, boolean ownerOnly) + { + checkWrite(); + return VMFile.setWritable(path, writable, ownerOnly); + } + + /** + * This method sets the owner's execute permission for the File represented + * by this object. + * + * It is the same as calling setExecutable(readable, true). + * + * @param executable true to set execute permission, + * false to unset execute permission. + * @return true if the file permissions are changed, + * false otherwise. + * @exception SecurityException If write access of the file is not permitted. + * @see #setExecutable(boolean, boolean) + * @since 1.6 + */ + public boolean setExecutable(boolean executable) + { + return setExecutable(executable, true); + } + + /** + * This method sets the execute permissions for the File represented by + * this object. + * + * If ownerOnly is set to true then only the + * execute permission bit for the owner of the file is changed. + * + * If ownerOnly is set to false, the file + * permissions are changed so that the file can be executed by everyone. + * + * On unix like systems this set the user, group + * and other write bits and is equal to call + * chmod a+x on the file. + * + * @param executable true to set write permission, + * false to unset write permission. + * @param ownerOnly true to set write permission + * for owner only, false for all. + * @return true if the file permissions are changed, + * false otherwise. + * @exception SecurityException If write access of the file is not permitted. + * @see #setExecutable(boolean) + * @since 1.6 + */ + public boolean setExecutable(boolean executable, boolean ownerOnly) + { + checkWrite(); + return VMFile.setExecutable(path, executable, ownerOnly); + } + + /** + * Get the total space for the partition pointed by this file path, in bytes. + * + * @return the total number of bytes in this partition. + * @since 1.6 + */ + public long getTotalSpace() + { + // check security manager. + SecurityManager s = System.getSecurityManager(); + if (s != null) + s.checkPermission(new RuntimePermission("getFileSystemAttributes")); + checkRead(); + + return VMFile.getTotalSpace(path); + } + + /** + * Get the free space in the partition pointed by this file path, in bytes. + * + * @return the number of free bytes in this partition. + * @since 1.6 + */ + public long getFreeSpace() + { + // check security manager. + SecurityManager s = System.getSecurityManager(); + if (s != null) + s.checkPermission(new RuntimePermission("getFileSystemAttributes")); + checkRead(); + + return VMFile.getFreeSpace(path); + } + + /** + * Get the usable space in the partition pointed by this file path, in bytes. + * This is not necessarily the same as the number returned by + * {@link #getFreeSpace()}. + * + * Implementation note: Unlike the RI, on Linux and UNIX + * like systems this methods take into account the reserved space for the + * "root" user. This means that the returned results will be a little + * different if a normal user or root perform the query. + * + * Also, the bytes returned should be interpreted as an hint, and may be + * different at each call of this method or even right after the method + * returns. + * + * @return the number of usable bytes in this partition. + * @since 1.6 + */ + public long getUsableSpace() + { + // check security manager. + SecurityManager s = System.getSecurityManager(); + if (s != null) + s.checkPermission(new RuntimePermission("getFileSystemAttributes")); + checkRead(); + + // root users can use the reserved extra space + String user = System.getProperty("user.name"); + if (user != null && user.equals("root")) + return VMFile.getFreeSpace(path); + + return VMFile.getUsableSpace(path); + } + + /** + * This method sets the file represented by this object to be read only. + * A read only file or directory cannot be modified. Please note that + * GNU systems allow read only files to be deleted if the directory it + * is contained in is writable. + * + * @return true if the operation succeeded, false + * otherwise. + * + * @exception SecurityException If the SecurityManager does + * not allow this operation. + * + * @since 1.2 + */ + public boolean setReadOnly() + { + // Do a security check before trying to do anything else. + checkWrite(); + + // Test for existence. + if (! VMFile.exists(path)) + return false; + + return VMFile.setReadOnly(path); + } + + /** + * This method returns an array of filesystem roots. Some operating systems + * have volume oriented filesystem. This method provides a mechanism for + * determining which volumes exist. GNU systems use a single hierarchical + * filesystem, so will have only one "/" filesystem root. + * + * @return An array of File objects for each filesystem root + * available. + * + * @since 1.2 + */ + public static File[] listRoots() + { + File[] roots = VMFile.listRoots(); + + SecurityManager s = System.getSecurityManager(); + if (s != null) + { + // Only return roots to which the security manager permits read access. + int count = roots.length; + for (int i = 0; i < roots.length; i++) + { + try + { + s.checkRead (roots[i].path); + } + catch (SecurityException sx) + { + roots[i] = null; + count--; + } + } + if (count != roots.length) + { + File[] newRoots = new File[count]; + int k = 0; + for (int i = 0; i < roots.length; i++) + { + if (roots[i] != null) + newRoots[k++] = roots[i]; + } + roots = newRoots; + } + } + return roots; + } + + /** + * This method creates a temporary file in the system temporary directory. + * The files created are guaranteed not to currently exist and the same file + * name will never be used twice in the same virtual machine instance. The + * system temporary directory is determined by examinging the + * java.io.tmpdir system property. + *

+ * The prefix parameter is a sequence of at least three + * characters that are used as the start of the generated filename. The + * suffix parameter is a sequence of characters that is used + * to terminate the file name. This parameter may be null + * and if it is, the suffix defaults to ".tmp". + *

+ * If a SecurityManager exists, then its checkWrite + * method is used to verify that this operation is permitted. + *

+ * This method is identical to calling + * createTempFile(prefix, suffix, null). + * + * @param prefix The character prefix to use in generating the path name. + * @param suffix The character suffix to use in generating the path name. + * + * @exception IllegalArgumentException If the prefix or suffix are not valid. + * @exception SecurityException If there is no permission to perform + * this operation + * @exception IOException If an error occurs + */ + public static File createTempFile(String prefix, String suffix) + throws IOException + { + return createTempFile(prefix, suffix, null); + } + + /** + * This method compares the specified File to this one + * to test for equality. It does this by comparing the canonical path names + * of the files. + *

+ * The canonical paths of the files are determined by calling the + * getCanonicalPath method on each object. + *

+ * This method returns a 0 if the specified Object is equal + * to this one, a negative value if it is less than this one + * a positive value if it is greater than this one. + * + * @return An integer as described above + * + * @since 1.2 + */ + public int compareTo(File other) + { + if (VMFile.IS_CASE_SENSITIVE) + return path.compareTo (other.path); + else + return path.compareToIgnoreCase (other.path); + } + + /** + * This method renames the file represented by this object to the path + * of the file represented by the argument File. + * + * @param dest The File object representing the target name + * + * @return true if the rename succeeds, false + * otherwise. + * + * @exception SecurityException If write access is not allowed to the + * file by the SecurityMananger. + */ + public synchronized boolean renameTo(File dest) + { + checkWrite(); + dest.checkWrite(); + // Call our native rename method + return VMFile.renameTo(path, dest.path); + } + + /** + * This method sets the modification time on the file to the specified + * value. This is specified as the number of seconds since midnight + * on January 1, 1970 GMT. + * + * @param time The desired modification time. + * + * @return true if the operation succeeded, false + * otherwise. + * + * @exception IllegalArgumentException If the specified time is negative. + * @exception SecurityException If the SecurityManager will + * not allow this operation. + * + * @since 1.2 + */ + public boolean setLastModified(long time) + { + if (time < 0) + throw new IllegalArgumentException("Negative modification time: " + time); + + checkWrite(); + return VMFile.setLastModified(path, time); + } + + private void checkWrite() + { + // Check the SecurityManager + SecurityManager s = System.getSecurityManager(); + + if (s != null) + s.checkWrite(path); + } + + private void checkRead() + { + // Check the SecurityManager + SecurityManager s = System.getSecurityManager(); + + if (s != null) + s.checkRead(path); + } + + private void checkExec() + { + // Check the SecurityManager + SecurityManager s = System.getSecurityManager(); + + if (s != null) + s.checkExec(path); + } + + /** + * Calling this method requests that the file represented by this object + * be deleted when the virtual machine exits. Note that this request cannot + * be cancelled. Also, it will only be carried out if the virtual machine + * exits normally. + * + * @exception SecurityException If deleting of the file is not allowed + * + * @since 1.2 + */ + public void deleteOnExit() + { + // Check the SecurityManager + SecurityManager sm = System.getSecurityManager(); + if (sm != null) + sm.checkDelete(path); + + DeleteFileHelper.add(this); + } + + private void writeObject(ObjectOutputStream oos) throws IOException + { + oos.defaultWriteObject(); + oos.writeChar(separatorChar); + } + + private void readObject(ObjectInputStream ois) + throws ClassNotFoundException, IOException + { + ois.defaultReadObject(); + + // If the file was from an OS with a different dir separator, + // fixup the path to use the separator on this OS. + char oldSeparatorChar = ois.readChar(); + + if (oldSeparatorChar != separatorChar) + path = path.replace(oldSeparatorChar, separatorChar); + } + +} // class File diff --git a/libjava/classpath/java/io/FileDescriptor.java b/libjava/classpath/java/io/FileDescriptor.java new file mode 100644 index 000000000..ce58a9fb0 --- /dev/null +++ b/libjava/classpath/java/io/FileDescriptor.java @@ -0,0 +1,140 @@ +/* FileDescriptor.java -- Opaque file handle class + Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004 + Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +import gnu.java.nio.FileChannelImpl; + +import java.nio.channels.ByteChannel; +import java.nio.channels.FileChannel; + +/** + * This class represents an opaque file handle as a Java class. It should + * be used only to pass to other methods that expect an object of this + * type. No system specific information can be obtained from this object. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + * @date September 24, 1998 + */ +public final class FileDescriptor +{ + /** + * A FileDescriptor representing the system standard input + * stream. This will usually be accessed through the + * System.invariable. + */ + public static final FileDescriptor in + = new FileDescriptor (FileChannelImpl.in); + + /** + * A FileDescriptor representing the system standard output + * stream. This will usually be accessed through the + * System.outvariable. + */ + public static final FileDescriptor out + = new FileDescriptor (FileChannelImpl.out); + + /** + * A FileDescriptor representing the system standard error + * stream. This will usually be accessed through the + * System.errvariable. + */ + public static final FileDescriptor err + = new FileDescriptor (FileChannelImpl.err); + + final ByteChannel channel; + + /** + * This method is used to initialize an invalid FileDescriptor object. + */ + public FileDescriptor() + { + channel = null; + } + + /** + * This method is used to initialize a FileDescriptor object. + */ + FileDescriptor(ByteChannel channel) + { + this.channel = channel; + } + + + /** + * This method forces all data that has not yet been physically written to + * the underlying storage medium associated with this + * FileDescriptor + * to be written out. This method will not return until all data has + * been fully written to the underlying device. If the device does not + * support this functionality or if an error occurs, then an exception + * will be thrown. + */ + public void sync () throws SyncFailedException + { + if (channel instanceof FileChannel) + { + try + { + ((FileChannel) channel).force(true); + } + catch (IOException ex) + { + if (ex instanceof SyncFailedException) + throw (SyncFailedException) ex; + else + throw new SyncFailedException(ex.toString()); + } + } + } + + /** + * This methods tests whether or not this object represents a valid open + * native file handle. + * + * @return true if this object represents a valid + * native file handle, false otherwise + */ + public boolean valid () + { + ByteChannel c = channel; + return (c != null) && (c.isOpen()); + } +} diff --git a/libjava/classpath/java/io/FileFilter.java b/libjava/classpath/java/io/FileFilter.java new file mode 100644 index 000000000..087c5e9f0 --- /dev/null +++ b/libjava/classpath/java/io/FileFilter.java @@ -0,0 +1,65 @@ +/* FileFilter.java -- Filter a list of pathnames + Copyright (C) 1998,2003 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This interface has one method which is used for filtering pathnames + * returned in a pathname listing. It is currently used by the + * File.listFiles(FileFilter) method. + *

+ * The method in this interface determines if a particular pathname should + * or should not be included in the pathname listing. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * + * @see File#listFiles(java.io.FileFilter) + */ +public interface FileFilter +{ + /** + * This method determines whether or not a given pathname should be included + * in a pathname listing. + * + * @param pathname The pathname to test + * + * @return true if the path should be included in the list, + * false otherwise. + */ + boolean accept(File pathname); +} diff --git a/libjava/classpath/java/io/FileInputStream.java b/libjava/classpath/java/io/FileInputStream.java new file mode 100644 index 000000000..0e71caf37 --- /dev/null +++ b/libjava/classpath/java/io/FileInputStream.java @@ -0,0 +1,322 @@ +/* FileInputStream.java -- An input stream that reads from disk files. + Copyright (C) 1998, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +import gnu.java.nio.FileChannelImpl; + +import java.nio.ByteBuffer; +import java.nio.channels.FileChannel; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * plus online API docs for JDK 1.2 beta from http://www.javasoft.com. + * Status: Believed complete and correct. + */ + +/** + * This class is a stream that reads its bytes from a file. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Warren Levy (warrenl@cygnus.com) + */ +public class FileInputStream extends InputStream +{ + /** + * This is the native file handle for the file this stream is reading from + */ + private FileDescriptor fd; + + private FileChannelImpl ch; + + /** + * This method initializes a FileInputStream to read from the + * specified named file. A security check is first made to determine + * whether or not access to this file is allowed. This is done by + * calling the checkRead() method of the + * SecurityManager + * (if one exists) with the name of this file. An exception is thrown + * if reading is not allowed. If the file does not exist, an exception + * is also thrown. + * + * @param name The name of the file this stream should read from + * + * @exception SecurityException If read access to the file is not allowed + * @exception FileNotFoundException If the file does not exist + * or if it is a directory + */ + public FileInputStream(String name) throws FileNotFoundException + { + this(new File(name)); + } + + /** + * This method initializes a FileInputStream to read from the + * specified File object. A security check is first + * made to determine + * whether or not access to this file is allowed. This is done by + * calling the checkRead() method of the + * SecurityManager + * (if one exists) with the name of this file. An exception is thrown + * if reading is not allowed. If the file does not exist, an exception + * is also thrown. + * + * @param file The File object this stream should read from + * + * @exception SecurityException If read access to the file is not allowed + * @exception FileNotFoundException If the file does not exist + * or if it is a directory. + */ + public FileInputStream(File file) throws FileNotFoundException + { + SecurityManager s = System.getSecurityManager(); + if (s != null) + s.checkRead(file.getPath()); + + try + { + ch = FileChannelImpl.create(file, FileChannelImpl.READ); + } + catch (FileNotFoundException fnfe) + { + throw fnfe; + } + catch (IOException ioe) + { + FileNotFoundException fnfe = new FileNotFoundException(file.getPath()); + fnfe.initCause(ioe); + throw fnfe; + } + } + + /** + * This method initializes a FileInputStream to read from the + * specified FileDescriptor object. A security + * check is first made to + * determine whether or not access to this file is allowed. This is done by + * calling the checkRead() method of the + * SecurityManager + * (if one exists) with the specified FileDescriptor + * An exception is + * thrown if reading is not allowed. + * + * @param fdObj The FileDescriptor object this stream + * should read from + * + * @exception SecurityException If read access to the file is not allowed + */ + public FileInputStream(FileDescriptor fdObj) + { + SecurityManager s = System.getSecurityManager(); + if (s != null) + s.checkRead(fdObj); + + fd = fdObj; + ch = (FileChannelImpl) fdObj.channel; + } + + FileInputStream(FileChannelImpl ch) + { + this.ch = ch; + } + + /** + * This method returns the number of bytes that can be read from this + * stream before a read can block. A return of 0 indicates that blocking + * might (or might not) occur on the very next read attempt. + *

+ * This method returns the number of unread bytes remaining in the file if + * the descriptor being read from is an actual file. If this method is + * reading from a ''special'' file such a the standard input, this method + * will return the appropriate value for the stream being read. + *

+ * Be aware that reads on plain files that do not reside locally might + * possibly block even if this method says they should not. For example, + * a remote server might crash, preventing an NFS mounted file from being + * read. + * + * @return The number of bytes that can be read before blocking could occur + * + * @exception IOException If an error occurs + */ + public int available() throws IOException + { + return ch.available(); + } + + /** + * This method closes the stream. Any futher attempts to read from the + * stream will likely generate an IOException since the underlying file + * will be closed. + * + * @exception IOException If an error occurs. + */ + public void close() throws IOException + { + ch.close(); + } + + protected void finalize() throws IOException + { + // We don't actually need this, but we include it because it is + // mentioned in the JCL. + } + + /** + * This method returns a FileDescriptor object representing the + * underlying native file handle of the file this stream is reading + * from + * + * @return A FileDescriptor for this stream + * + * @exception IOException If an error occurs + */ + public final FileDescriptor getFD() throws IOException + { + synchronized (this) + { + if (fd == null) + fd = new FileDescriptor (ch); + return fd; + } + } + + /** + * This method reads an unsigned byte from the input stream and returns it + * as an int in the range of 0-255. This method also will return -1 if + * the end of the stream has been reached. + *

+ * This method will block until the byte can be read. + * + * @return The byte read or -1 if end of stream + * + * @exception IOException If an error occurs + */ + public int read() throws IOException + { + return ch.read(); + } + + /** + * This method reads bytes from a stream and stores them into a caller + * supplied buffer. This method attempts to completely fill the buffer, + * but can return before doing so. The actual number of bytes read is + * returned as an int. A -1 is returned to indicate the end of the stream. + *

+ * This method will block until some data can be read. + *

+ * This method operates by calling an overloaded read method like so: + * read(buf, 0, buf.length) + * + * @param buf The buffer into which the bytes read will be stored. + * + * @return The number of bytes read or -1 if end of stream. + * + * @exception IOException If an error occurs. + */ + public int read(byte[] buf) throws IOException + { + return read(buf, 0, buf.length); + } + + /** + * This method read bytes from a stream and stores them into a caller + * supplied buffer. It starts storing the data at index + * offset into + * the buffer and attempts to read len bytes. This method can + * return before reading the number of bytes requested. The actual number + * of bytes read is returned as an int. A -1 is returned to indicate the + * end of the stream. + *

+ * This method will block until some data can be read. + * + * @param buf The array into which the bytes read should be stored + * @param offset The offset into the array to start storing bytes + * @param len The requested number of bytes to read + * + * @return The actual number of bytes read, or -1 if end of stream. + * + * @exception IOException If an error occurs. + */ + public int read(byte[] buf, int offset, int len) throws IOException + { + if (offset < 0 + || len < 0 + || offset + len > buf.length) + throw new ArrayIndexOutOfBoundsException(); + + return ch.read(ByteBuffer.wrap(buf, offset, len)); + } + + /** + * This method skips the specified number of bytes in the stream. It + * returns the actual number of bytes skipped, which may be less than the + * requested amount. + *

+ * @param numBytes The requested number of bytes to skip + * + * @return The actual number of bytes skipped. + * + * @exception IOException If an error occurs + */ + public synchronized long skip (long numBytes) throws IOException + { + if (numBytes < 0) + throw new IllegalArgumentException ("Can't skip negative bytes: " + + numBytes); + + if (numBytes == 0) + return 0; + + long oldPos = ch.position (); + ch.position(oldPos + numBytes); + return ch.position() - oldPos; + } + + /** + * This method creates a java.nio.channels.FileChannel. + * Nio does not allow one to create a file channel directly. + * A file channel must be created by first creating an instance of + * Input/Output/RandomAccessFile and invoking the getChannel() method on it. + */ + public synchronized FileChannel getChannel () + { + return ch; + } + +} // class FileInputStream diff --git a/libjava/classpath/java/io/FileNotFoundException.java b/libjava/classpath/java/io/FileNotFoundException.java new file mode 100644 index 000000000..3c11e2960 --- /dev/null +++ b/libjava/classpath/java/io/FileNotFoundException.java @@ -0,0 +1,73 @@ +/* FileNotFoundException.java -- the requested file could not be found + Copyright (C) 1998, 1999, 2001, 2002, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This exception is thrown when an attempt is made to access a file that + * does not exist, or is inaccessible for some other reason (such as writing + * a read-only file). + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + * @status updated to 1.4 + */ +public class FileNotFoundException extends IOException +{ + /** + * Compatible with JDK 1.0+. + */ + private static final long serialVersionUID = -897856973823710492L; + + /** + * Create an exception without a descriptive error message. + */ + public FileNotFoundException() + { + } + + /** + * Create an exception with a descriptive error message. + * + * @param message the descriptive error message + */ + public FileNotFoundException(String message) + { + super(message); + } +} // class FileNotFoundException diff --git a/libjava/classpath/java/io/FileOutputStream.java b/libjava/classpath/java/io/FileOutputStream.java new file mode 100644 index 000000000..6915822ea --- /dev/null +++ b/libjava/classpath/java/io/FileOutputStream.java @@ -0,0 +1,309 @@ +/* FileOutputStream.java -- Writes to a file on disk. + Copyright (C) 1998, 2001, 2003, 2004, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +import gnu.java.nio.FileChannelImpl; + +import java.nio.ByteBuffer; +import java.nio.channels.FileChannel; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * Status: Complete to version 1.1. + */ + +/** + * This classes allows a stream of data to be written to a disk file or + * any open FileDescriptor. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + */ +public class FileOutputStream extends OutputStream +{ + private FileDescriptor fd; + + private final FileChannelImpl ch; + + /** + * This method initializes a FileOutputStream object to write + * to the named file. The file is created if it does not exist, and + * the bytes written are written starting at the beginning of the file if + * the append argument is false or at the end + * of the file if the append argument is true. + *

+ * Before opening a file, a security check is performed by calling the + * checkWrite method of the SecurityManager (if + * one exists) with the name of the file to be opened. An exception is + * thrown if writing is not allowed. + * + * @param path The name of the file this stream should write to + * @param append true to append bytes to the end of the file, + * or false to write bytes to the beginning + * + * @exception SecurityException If write access to the file is not allowed + * @exception FileNotFoundException If a non-security error occurs + */ + public FileOutputStream (String path, boolean append) + throws SecurityException, FileNotFoundException + { + this (new File(path), append); + } + + /** + * This method initializes a FileOutputStream object to write + * to the named file. The file is created if it does not exist, and + * the bytes written are written starting at the beginning of the file. + *

+ * Before opening a file, a security check is performed by calling the + * checkWrite method of the SecurityManager (if + * one exists) with the name of the file to be opened. An exception is + * thrown if writing is not allowed. + * + * @param path The name of the file this stream should write to + * + * @exception SecurityException If write access to the file is not allowed + * @exception FileNotFoundException If a non-security error occurs + */ + public FileOutputStream (String path) + throws SecurityException, FileNotFoundException + { + this (path, false); + } + + /** + * This method initializes a FileOutputStream object to write + * to the specified File object. The file is created if it + * does not exist, and the bytes written are written starting at the + * beginning of the file. + *

+ * Before opening a file, a security check is performed by calling the + * checkWrite method of the SecurityManager (if + * one exists) with the name of the file to be opened. An exception is + * thrown if writing is not allowed. + * + * @param file The File object this stream should write to + * + * @exception SecurityException If write access to the file is not allowed + * @exception FileNotFoundException If a non-security error occurs + */ + public FileOutputStream (File file) + throws SecurityException, FileNotFoundException + { + this (file, false); + } + + /** + * This method initializes a FileOutputStream object to write + * to the specified File object. The file is created if it + * does not exist, and the bytes written are written starting at the + * beginning of the file if the append parameter is + * false. Otherwise bytes are written at the end of the + * file. + *

+ * Before opening a file, a security check is performed by calling the + * checkWrite method of the SecurityManager (if + * one exists) with the name of the file to be opened. An exception is + * thrown if writing is not allowed. + * + * @param file The File object this stream should write to + * @param append true to append bytes to the end of the file, + * or false to write bytes to the beginning + * + * @exception SecurityException If write access to the file is not allowed + * @exception FileNotFoundException If a non-security error occurs + */ + public FileOutputStream (File file, boolean append) + throws FileNotFoundException + { + SecurityManager s = System.getSecurityManager(); + if (s != null) + s.checkWrite(file.getPath()); + + try + { + ch = FileChannelImpl.create(file, (append + ? FileChannelImpl.WRITE + | FileChannelImpl.APPEND + : FileChannelImpl.WRITE)); + } + catch (FileNotFoundException fnfe) + { + throw fnfe; + } + catch (IOException ioe) + { + FileNotFoundException fnfe = new FileNotFoundException(file.getPath()); + fnfe.initCause(ioe); + throw fnfe; + } + } + + /** + * This method initializes a FileOutputStream object to write + * to the file represented by the specified FileDescriptor + * object. This method does not create any underlying disk file or + * reposition the file pointer of the given descriptor. It assumes that + * this descriptor is ready for writing as is. + *

+ * Before opening a file, a security check is performed by calling the + * checkWrite method of the SecurityManager (if + * one exists) with the specified FileDescriptor as an argument. + * An exception is thrown if writing is not allowed. + * + * @param fdObj The FileDescriptor this stream should write to + * + * @exception SecurityException If write access to the file is not allowed + */ + public FileOutputStream (FileDescriptor fdObj) + throws SecurityException + { + // Hmm, no other exception but this one to throw, but if the descriptor + // isn't valid, we surely don't have "permission" to write to it. + if (!fdObj.valid()) + throw new SecurityException("Invalid FileDescriptor"); + + SecurityManager s = System.getSecurityManager(); + if (s != null) + s.checkWrite(fdObj); + + fd = fdObj; + ch = (FileChannelImpl) fdObj.channel; + } + + FileOutputStream(FileChannelImpl ch) + { + this.ch = ch; + } + + protected void finalize () throws IOException + { + // We don't actually need this, but we include it because it is + // mentioned in the JCL. + } + + /** + * This method returns a FileDescriptor object representing + * the file that is currently being written to + * + * @return A FileDescriptor object for this stream + * + * @exception IOException If an error occurs + */ + public final FileDescriptor getFD () throws IOException + { + synchronized (this) + { + if (fd == null) + fd = new FileDescriptor (ch); + return fd; + } + } + + /** + * This method writes a single byte of data to the file. + * + * @param b The byte of data to write, passed as an int + * + * @exception IOException If an error occurs + */ + public void write (int b) throws IOException + { + ch.write (b); + } + + /** + * This method writes all the bytes in the specified array to the + * file. + * + * @param buf The array of bytes to write to the file + * + * @exception IOException If an error occurs + */ + public void write (byte[] buf) + throws IOException + { + write (buf, 0, buf.length); + } + + /** + * This method writes len bytes from the byte array + * buf to the file starting at index offset. + * + * @param buf The array of bytes to write to the file + * @param offset The offset into the array to start writing bytes from + * @param len The number of bytes to write to the file + * + * @exception IOException If an error occurs + */ + public void write (byte[] buf, int offset, int len) + throws IOException + { + if (offset < 0 + || len < 0 + || offset + len > buf.length) + throw new ArrayIndexOutOfBoundsException (); + + ch.write(ByteBuffer.wrap(buf, offset, len)); + } + + /** + * This method closes the underlying file. Any further attempts to + * write to this stream will likely generate an exception since the + * file is closed. + * + * @exception IOException If an error occurs + */ + public void close () throws IOException + { + ch.close(); + } + + /** + * This method creates a java.nio.channels.FileChannel. + * Nio does not allow one to create a file channel directly. + * A file channel must be created by first creating an instance of + * Input/Output/RandomAccessFile and invoking the getChannel() method on it. + */ + public synchronized FileChannel getChannel() + { + return ch; + } + +} // class FileOutputStream diff --git a/libjava/classpath/java/io/FilePermission.java b/libjava/classpath/java/io/FilePermission.java new file mode 100644 index 000000000..5aa10b3c0 --- /dev/null +++ b/libjava/classpath/java/io/FilePermission.java @@ -0,0 +1,293 @@ +/* FilePermission.java -- + Copyright (C) 1998, 2000, 2003, 2004, 2005, 2006 + Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +import java.security.Permission; + +public final class FilePermission extends Permission implements Serializable +{ + private static final long serialVersionUID = 7930732926638008763L; + + private static final String ALL_FILES = "<>"; + + private boolean readPerm = false; + private boolean writePerm = false; + private boolean executePerm = false; + private boolean deletePerm = false; + private final String actionsString; + + // Checks and caches the actions + private void checkPerms() throws IllegalArgumentException + { + String action; + int i = actionsString.indexOf(','); + int startI = 0; + while (i != -1) + { + action = actionsString.substring(startI, i).trim().toLowerCase(); + if (action.equals("read")) + readPerm = true; + else if (action.equals("write")) + writePerm = true; + else if (action.equals("execute")) + executePerm = true; + else if (action.equals("delete")) + deletePerm = true; + else + throw new IllegalArgumentException("Unknown action: " + action); + + startI = i + 1; + i = actionsString.indexOf(',', startI); + } + + action = actionsString.substring(startI).trim().toLowerCase(); + if (action.equals("read")) + readPerm = true; + else if (action.equals("write")) + writePerm = true; + else if (action.equals("execute")) + executePerm = true; + else if (action.equals("delete")) + deletePerm = true; + else + throw new IllegalArgumentException("Unknown action: " + action); + } + + /** + * Create a new FilePermission. + * + * @param pathExpression an expression specifying the paths this + * permission represents. + * @param actionsString a comma-separated list of the actions this + * permission represents. The actions must be "read", "write", + * "execute" and/or "delete". + */ + public FilePermission(String pathExpression, String actionsString) + { + // FIXME: what to do when the file string is malformed? + super(pathExpression); + if (pathExpression == null) + throw new NullPointerException("pathExpression"); + if (actionsString == null) + throw new IllegalArgumentException("actionsString"); + this.actionsString = actionsString; + checkPerms(); + } + + /** + * Get the actions this FilePermission supports. + * @return the String representing the actions this FilePermission supports. + */ + public String getActions() + { + return actionsString; + } + + /** + * Get the hash code for this Object.

+ * FilePermission's hash code is calculated as the exclusive or of the + * target + * String's hash code and the action String's hash code. + * @specnote Sun did not specify how to calculate the hash code; + * I made this up. + * @return the hash code for this Object. + */ + public int hashCode() + { + return getName().hashCode() ^ actionsString.hashCode(); + } + + /** + * Check two FilePermissions for semantic equality. + * Two FilePermissions are exactly equivalent if they have identical path + * expressions and have exactly the same access permissions. + * @param o the Object to compare to. + * @return whether the Objects are semantically equivalent. + */ + public boolean equals(Object o) + { + if (! (o instanceof FilePermission)) + return false; + FilePermission p = (FilePermission) o; + + String f1 = getName(); + String f2 = p.getName(); + + // Compare names, taking into account if they refer to a directory + // and one has a separator and the other does not. + if (f1.length() > 0 && f1.charAt(f1.length() - 1) == File.separatorChar) + { + if (f2.length() > 0 + && f2.charAt(f2.length() - 1) == File.separatorChar) + { + if (! f2.equals(f1)) + return false; + } + else + { + if (! f2.equals(f1.substring(0, f1.length() - 1))) + return false; + } + } + else + { + if (f2.length() > 0 + && f2.charAt(f2.length() - 1) == File.separatorChar) + { + if (! f1.equals(f2.substring(0, f2.length() - 1))) + return false; + } + else + { + if (! f1.equals(f2)) + return false; + } + } + return (readPerm == p.readPerm + && writePerm == p.writePerm + && executePerm == p.executePerm + && deletePerm == p.deletePerm); + } + + /** + * Check to see if this permission implies another. + * Permission A implies permission B if these things are all true: + *

    + *
  1. A and B are both FilePermissions.
    2. + *
  2. All possible files in B are included in A + * (possibly more are in A).
    3. + *
  3. All actions B supports, A also supports.
    4. + *
+ * @param p the Permission to compare against. + * @return whether this Permission implies p + */ + public boolean implies(Permission p) + { + if (! (p instanceof FilePermission)) + return false; + + String f1 = getName(); + + if (f1.equals(ALL_FILES)) + return true; + + FilePermission fp = (FilePermission) p; + String f2 = fp.getName(); + + if (f2.equals(ALL_FILES)) + return false; + + try + { + f1 = new File(f1).getCanonicalPath(); + f2 = new File(f2).getCanonicalPath(); + } + catch (IOException ioe) + { + return false; + } + + String sub1; + + switch (f1.charAt(f1.length() - 1)) + { + case '*': + sub1 = f1.substring(0, f1.length() - 1); // chop off "*" + if (f2.length() <= sub1.length()) + { + // If it's smaller, there is no way it could be part of + // this directory. If it's the same (or length - 1), it + // could be the same directory but specifies access to + // the directory rather than the files in it. + return false; + } + else if (f2.charAt(sub1.length() - 1) == File.separatorChar) + { + // Make sure the part before the "/" is the same. + if (! f2.substring(0, sub1.length()).equals(sub1)) + return false; + // Make sure there are no subdirectories specified + // underneath this one. + if (f2.substring(sub1.length() + 1).indexOf(File.separatorChar) + != -1) + return false; + } + else + { + // Obviously not equal: f2 is either not a directory or + // is not the same directory (its name continues further + // than we want). + return false; + } + break; + case '-': + // Chop off "/-". + sub1 = f1.substring(0, f1.length() - 2); + if (f2.length() < sub1.length()) + { + // If it's smaller, there is no way it could be part of + // this directory. + return false; + } + else if (f2.length() > sub1.length() + && f2.charAt(sub1.length()) != File.separatorChar) + return false; + else if (! f2.substring(0, sub1.length()).equals(sub1)) + return false; + break; + + default: + if (!f1.equals(f2)) + return false; + break; + } + + if (fp.readPerm && ! readPerm) + return false; + if (fp.writePerm && ! writePerm) + return false; + if (fp.executePerm && ! executePerm) + return false; + if (fp.deletePerm && ! deletePerm) + return false; + + return true; + } +} diff --git a/libjava/classpath/java/io/FileReader.java b/libjava/classpath/java/io/FileReader.java new file mode 100644 index 000000000..05e14c376 --- /dev/null +++ b/libjava/classpath/java/io/FileReader.java @@ -0,0 +1,91 @@ +/* FileReader.java -- Convenience class for reading characters from a file + Copyright (C) 1998, 2000, 2003 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This class provides a convenient way to set up a Reader + * to read from a file. It opens the specified file for reading and creates + * the InputStreamReader to read from the + * resulting FileInputStream. This class can only be used + * to read from files using the default character encoding. Use + * InputStreamReader directly to use a non-default encoding. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + */ +public class FileReader extends InputStreamReader +{ + /** + * This method initializes a FileReader instance to read from + * the specified File object. + * + * @param file The File object representing the file to read from + * + * @exception FileNotFoundException If the file is not found or some other + * error occurs + */ + public FileReader(File file) throws FileNotFoundException + { + super(new FileInputStream(file)); + } + + /** + * This method initializes a FileReader instance to read from + * this specified FileDescriptor object. + * + * @param fd The FileDescriptor to read from. + */ + public FileReader(FileDescriptor fd) + { + super(new FileInputStream(fd)); + } + + /** + * This method initializes a FileReader instance to read from + * the specified named file. + * + * @param name The name of the file to read from + * + * @exception FileNotFoundException If the file is not found or some other + * error occurs + */ + public FileReader(String name) throws FileNotFoundException + { + super(new FileInputStream(name)); + } +} // class FileReader diff --git a/libjava/classpath/java/io/FileWriter.java b/libjava/classpath/java/io/FileWriter.java new file mode 100644 index 000000000..95d5eea3b --- /dev/null +++ b/libjava/classpath/java/io/FileWriter.java @@ -0,0 +1,137 @@ +/* FileWriter.java -- Convenience class for writing to files. + Copyright (C) 1998, 1999, 2001, 2003, 2004 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * Status: Complete to version 1.1. + */ + +/** + * This is a convenience class for writing to files. It creates an + * FileOutputStream and initializes an + * OutputStreamWriter to write to it. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + */ +public class FileWriter extends OutputStreamWriter +{ + /** + * This method initializes a new FileWriter object to write + * to the specified File object. + * + * @param file The File object to write to. + * + * @throws SecurityException If writing to this file is forbidden by the + * SecurityManager. + * @throws IOException If any other error occurs + */ + public FileWriter(File file) throws SecurityException, IOException + { + super(new FileOutputStream(file)); + } + + /** + * This method initializes a new FileWriter object to write + * to the specified File object. + * + * @param file The File object to write to. + * @param append true to start adding data at the end of the + * file, false otherwise. + * + * @throws SecurityException If writing to this file is forbidden by the + * SecurityManager. + * @throws IOException If any other error occurs + */ + public FileWriter(File file, boolean append) throws IOException + { + super(new FileOutputStream(file, append)); + } + + /** + * This method initializes a new FileWriter object to write + * to the specified FileDescriptor object. + * + * @param fd The FileDescriptor object to write to + * + * @throws SecurityException If writing to this file is forbidden by the + * SecurityManager. + */ + public FileWriter(FileDescriptor fd) throws SecurityException + { + super(new FileOutputStream(fd)); + } + + /** + * This method intializes a new FileWriter object to + * write to the + * specified named file. + * + * @param name The name of the file to write to + * + * @throws SecurityException If writing to this file is forbidden by the + * SecurityManager. + * @throws IOException If any other error occurs + */ + public FileWriter(String name) throws IOException + { + super(new FileOutputStream(name)); + } + + /** + * This method intializes a new FileWriter object to + * write to the + * specified named file. This form of the constructor allows the caller + * to determine whether data should be written starting at the beginning or + * the end of the file. + * + * @param name The name of the file to write to + * @param append true to start adding data at the end of the + * file, false otherwise. + * + * @throws SecurityException If writing to this file is forbidden by the + * SecurityManager. + * @throws IOException If any other error occurs + */ + public FileWriter(String name, boolean append) throws IOException + { + super(new FileOutputStream(name, append)); + } +} diff --git a/libjava/classpath/java/io/FilenameFilter.java b/libjava/classpath/java/io/FilenameFilter.java new file mode 100644 index 000000000..5a9045f52 --- /dev/null +++ b/libjava/classpath/java/io/FilenameFilter.java @@ -0,0 +1,75 @@ +/* FilenameFilter.java -- Filter a list of filenames + Copyright (C) 1998, 1999, 2001, 2003, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * Status: Complete to 1.1. + */ + +/** + * This interface has one method which is used for filtering filenames + * returned in a directory listing. It is currently used by the + * File.list(FilenameFilter) method and by the filename + * dialog in AWT. + *

+ * The method in this interface determines if a particular file should + * or should not be included in the file listing. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + * + * @see File#listFiles(java.io.FilenameFilter) + * @see java.awt.FileDialog#setFilenameFilter(java.io.FilenameFilter) + */ +public interface FilenameFilter +{ + /** + * This method determines whether or not a given file should be included + * in a directory listing. + * + * @param dir The File instance for the directory being read + * @param name The name of the file to test + * + * @return true if the file should be included in the list, + * false otherwise. + */ + boolean accept(File dir, String name); + +} // interface FilenameFilter diff --git a/libjava/classpath/java/io/FilterInputStream.java b/libjava/classpath/java/io/FilterInputStream.java new file mode 100644 index 000000000..c9d50e535 --- /dev/null +++ b/libjava/classpath/java/io/FilterInputStream.java @@ -0,0 +1,203 @@ +/* FilterInputStream.java -- Base class for classes that filter input + Copyright (C) 1998, 1999, 2001, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * plus online API docs for JDK 1.2 beta from http://www.javasoft.com. + * Status: Believed complete and correct. + */ + +/** + * This is the common superclass of all standard classes that filter + * input. It acts as a layer on top of an underlying InputStream + * and simply redirects calls made to it to the subordinate InputStream + * instead. Subclasses of this class perform additional filtering + * functions in addition to simply redirecting the call. + *

+ * This class is not abstract. However, since it only redirects calls + * to a subordinate InputStream without adding any functionality + * on top of it, this class should not be used directly. Instead, various + * subclasses of this class should be used. This is enforced with a + * protected constructor. Do not try to hack around it. + *

+ * When creating a subclass of FilterInputStream, override the + * appropriate methods to implement the desired filtering. However, note + * that the read(byte[]) method does not need to be overridden + * as this class redirects calls to that method to + * read(byte[], int, int) instead of to the subordinate + * InputStream read(byte[]) method. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Warren Levy (warrenl@cygnus.com) + */ +public class FilterInputStream extends InputStream +{ + /** + * This is the subordinate InputStream to which method calls + * are redirected + */ + protected InputStream in; + + /** + * Create a FilterInputStream with the specified subordinate + * InputStream. + * + * @param in The subordinate InputStream + */ + protected FilterInputStream(InputStream in) + { + this.in = in; + } + + /** + * Calls the in.mark(int) method. + * + * @param readlimit The parameter passed to in.mark(int) + */ + public void mark(int readlimit) + { + in.mark(readlimit); + } + + /** + * Calls the in.markSupported() method. + * + * @return true if mark/reset is supported, false + * otherwise + */ + public boolean markSupported() + { + return in.markSupported(); + } + + /** + * Calls the in.reset() method. + * + * @exception IOException If an error occurs + */ + public void reset() throws IOException + { + in.reset(); + } + + /** + * Calls the in.available() method. + * + * @return The value returned from in.available() + * + * @exception IOException If an error occurs + */ + public int available() throws IOException + { + return in.available(); + } + + /** + * Calls the in.skip(long) method + * + * @param numBytes The requested number of bytes to skip. + * + * @return The value returned from in.skip(long) + * + * @exception IOException If an error occurs + */ + public long skip(long numBytes) throws IOException + { + return in.skip(numBytes); + } + + /** + * Calls the in.read() method + * + * @return The value returned from in.read() + * + * @exception IOException If an error occurs + */ + public int read() throws IOException + { + return in.read(); + } + + /** + * Calls the read(byte[], int, int) overloaded method. + * Note that + * this method does not redirect its call directly to a corresponding + * method in in. This allows subclasses to override only the + * three argument version of read. + * + * @param buf The buffer to read bytes into + * + * @return The value retured from in.read(byte[], int, int) + * + * @exception IOException If an error occurs + */ + public int read(byte[] buf) throws IOException + { + return read(buf, 0, buf.length); + } + + /** + * Calls the in.read(byte[], int, int) method. + * + * @param buf The buffer to read bytes into + * @param offset The index into the buffer to start storing bytes + * @param len The maximum number of bytes to read. + * + * @return The value retured from in.read(byte[], int, int) + * + * @exception IOException If an error occurs + */ + public int read(byte[] buf, int offset, int len) throws IOException + { + return in.read(buf, offset, len); + } + + /** + * This method closes the input stream by closing the input stream that + * this object is filtering. Future attempts to access this stream may + * throw an exception. + * + * @exception IOException If an error occurs + */ + public void close() throws IOException + { + in.close(); + } +} diff --git a/libjava/classpath/java/io/FilterOutputStream.java b/libjava/classpath/java/io/FilterOutputStream.java new file mode 100644 index 000000000..401e5478c --- /dev/null +++ b/libjava/classpath/java/io/FilterOutputStream.java @@ -0,0 +1,149 @@ +/* FilterOutputStream.java -- Parent class for output streams that filter + Copyright (C) 1998, 1999, 2001, 2003, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * Status: Complete to version 1.1. + */ + +/** + * This class is the common superclass of output stream classes that + * filter the output they write. These classes typically transform the + * data in some way prior to writing it out to another underlying + * OutputStream. This class simply overrides all the + * methods in OutputStream to redirect them to the + * underlying stream. Subclasses provide actual filtering. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + */ +public class FilterOutputStream extends OutputStream +{ + /** + * This is the subordinate OutputStream that this class + * redirects its method calls to. + */ + protected OutputStream out; + + /** + * This method initializes an instance of FilterOutputStream + * to write to the specified subordinate OutputStream. + * + * @param out The OutputStream to write to + */ + public FilterOutputStream(OutputStream out) + { + this.out = out; + } + + /** + * This method closes the underlying OutputStream. Any + * further attempts to write to this stream may throw an exception. + * + * @exception IOException If an error occurs + */ + public void close() throws IOException + { + flush(); + out.close(); + } + + /** + * This method attempt to flush all buffered output to be written to the + * underlying output sink. + * + * @exception IOException If an error occurs + */ + public void flush() throws IOException + { + out.flush(); + } + + /** + * This method writes a single byte of output to the underlying + * OutputStream. + * + * @param b The byte to write, passed as an int. + * + * @exception IOException If an error occurs + */ + public void write(int b) throws IOException + { + out.write(b); + } + + /** + * This method writes all the bytes in the specified array to the underlying + * OutputStream. It does this by calling the three parameter + * version of this method - write(byte[], int, int) in this + * class instead of writing to the underlying OutputStream + * directly. This allows most subclasses to avoid overriding this method. + * + * @param buf The byte array to write bytes from + * + * @exception IOException If an error occurs + */ + public void write(byte[] buf) throws IOException + { + // Don't do checking here, per Java Lang Spec. + write(buf, 0, buf.length); + } + + /** + * This method calls the write(int) method len + * times for all bytes from the array buf starting at index + * offset. Subclasses should overwrite this method to get a + * more efficient implementation. + * + * @param buf The byte array to write bytes from + * @param offset The index into the array to start writing bytes from + * @param len The number of bytes to write + * + * @exception IOException If an error occurs + */ + public void write(byte[] buf, int offset, int len) throws IOException + { + // Don't do checking here, per Java Lang Spec. + for (int i=0; i < len; i++) + write(buf[offset + i]); + + } + +} // class FilterOutputStream diff --git a/libjava/classpath/java/io/FilterReader.java b/libjava/classpath/java/io/FilterReader.java new file mode 100644 index 000000000..0e57e21c5 --- /dev/null +++ b/libjava/classpath/java/io/FilterReader.java @@ -0,0 +1,184 @@ +/* FilterReader.java -- Base class for char stream classes that filter input + Copyright (C) 1998, 1999, 2001, 2003, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * plus online API docs for JDK 1.2 beta from http://www.javasoft.com. + * Status: Believed complete and correct. + */ + +/** + * This is the common superclass of all standard classes that filter + * input. It acts as a layer on top of an underlying Reader + * and simply redirects calls made to it to the subordinate Reader + * instead. Subclasses of this class perform additional filtering + * functions in addition to simply redirecting the call. + *

+ * When creating a subclass of FilterReader, override the + * appropriate methods to implement the desired filtering. However, note + * that the read(char[]) method does not need to be overridden + * as this class redirects calls to that method to + * read(yte[], int, int) instead of to the subordinate + * Reader} read(yte[]) method. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Warren Levy (warrenl@cygnus.com) + */ +public abstract class FilterReader extends Reader +{ + /** + * This is the subordinate Reader to which method calls + * are redirected + */ + protected Reader in; + + /** + * Create a FilterReader with the specified subordinate + * Reader. + * The lock of the new FilterReader will be set + * to in.lock. + * + * @param in The subordinate Reader + */ + protected FilterReader(Reader in) + { + super(in.lock); + this.in = in; + } + + /** + * Calls the in.mark(int) method. + * + * @param readlimit The parameter passed to in.mark(int) + * + * @exception IOException If an error occurs + */ + public void mark(int readlimit) throws IOException + { + in.mark(readlimit); + } + + /** + * Calls the in.markSupported() method. + * + * @return true if mark/reset is supported, + * false otherwise + */ + public boolean markSupported() + { + return(in.markSupported()); + } + + /** + * Calls the in.reset() method. + * + * @exception IOException If an error occurs + */ + public void reset() throws IOException + { + in.reset(); + } + + /** + * Calls the in.read() method. + * + * @return The value returned from in.available() + * + * @exception IOException If an error occurs + */ + public boolean ready() throws IOException + { + return(in.ready()); + } + + /** + * Calls the in.skip(long) method + * + * @param num_chars The requested number of chars to skip. + * + * @return The value returned from in.skip(long) + * + * @exception IOException If an error occurs + */ + public long skip(long num_chars) throws IOException + { + return(in.skip(num_chars)); + } + + /** + * Calls the in.read() method + * + * @return The value returned from in.read() + * + * @exception IOException If an error occurs + */ + public int read() throws IOException + { + return(in.read()); + } + + /** + * Calls the in.read(char[], int, int) method. + * + * @param buf The buffer to read chars into + * @param offset The index into the buffer to start storing chars + * @param len The maximum number of chars to read. + * + * @return The value retured from in.read(char[], int, int) + * + * @exception IOException If an error occurs + */ + public int read(char[] buf, int offset, int len) throws IOException + { + return(in.read(buf, offset, len)); + } + + /** + * This method closes the stream by calling the close() method + * of the underlying stream. + * + * @exception IOException If an error occurs + */ + public void close() throws IOException + { + in.close(); + } + +} // class FilterReader diff --git a/libjava/classpath/java/io/FilterWriter.java b/libjava/classpath/java/io/FilterWriter.java new file mode 100644 index 000000000..382dec06a --- /dev/null +++ b/libjava/classpath/java/io/FilterWriter.java @@ -0,0 +1,146 @@ +/* FilterWriter.java -- Parent class for output streams that filter + Copyright (C) 1998, 1999, 2001, 2003, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * Status: Complete to version 1.1. + */ + +/** + * This class is the common superclass of output character stream classes + * that filter the output they write. These classes typically transform the + * data in some way prior to writing it out to another underlying + * Writer. This class simply overrides all the + * methods in Writer to redirect them to the + * underlying stream. Subclasses provide actual filtering. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + */ +public abstract class FilterWriter extends Writer +{ + /** + * This is the subordinate Writer that this class + * redirects its method calls to. + */ + protected Writer out; + + /** + * This method initializes an instance of FilterWriter + * to write to the specified subordinate Writer. + * The given Writer will be used as lock for + * the newly created FilterWriter. + * + * @param out The Writer to write to + */ + protected FilterWriter(Writer out) + { + super(out.lock); + this.out = out; + } + + /** + * This method closes the underlying Writer. Any + * further attempts to write to this stream may throw an exception. + * + * @exception IOException If an error occurs + */ + public void close() throws IOException + { + out.close(); + } + + /** + * This method attempt to flush all buffered output to be written to the + * underlying output sink. + * + * @exception IOException If an error occurs + */ + public void flush() throws IOException + { + out.flush(); + } + + /** + * This method writes a single char of output to the underlying + * Writer. + * + * @param b The char to write, passed as an int. + * + * @exception IOException If an error occurs + */ + public void write(int b) throws IOException + { + out.write(b); + } + + /** + * This method writes len chars from the array buf + * starting at index offset to the underlying + * Writer. + * + * @param buf The char array to write chars from + * @param offset The index into the array to start writing chars from + * @param len The number of chars to write + * + * @exception IOException If an error occurs + */ + public void write(char[] buf, int offset, int len) throws IOException + { + out.write(buf, offset, len); + } + + /** + * This method writes len chars from the String + * starting at position offset. + * + * @param str The String that is to be written + * @param offset The character offset into the String + * to start writing from + * @param len The number of chars to write + * + * @exception IOException If an error occurs + */ + public void write(String str, int offset, int len) throws IOException + { + out.write(str, offset, len); + } + +} // class FilterWriter diff --git a/libjava/classpath/java/io/Flushable.java b/libjava/classpath/java/io/Flushable.java new file mode 100644 index 000000000..e9718d60a --- /dev/null +++ b/libjava/classpath/java/io/Flushable.java @@ -0,0 +1,62 @@ +/* Flushable.java -- Flushable object + Copyright (C) 2004, 2005 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package java.io; + +/** + * A Flushable class represents a stream of + * data, for which internally buffered data can be `flushed'. + * Flushing such a stream causes the buffered data to be + * written to the stream. + * + * @author Tom Tromey (tromey@redhat.com) + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + * @since 1.5 + */ +public interface Flushable +{ + + /** + * Flushes the stream represented by this class, + * so that any buffered data is written to the stream. + * + * @throws IOException if an I/O error occurs in flushing. + */ + void flush() + throws IOException; + +} diff --git a/libjava/classpath/java/io/IOException.java b/libjava/classpath/java/io/IOException.java new file mode 100644 index 000000000..cf3ad1946 --- /dev/null +++ b/libjava/classpath/java/io/IOException.java @@ -0,0 +1,74 @@ +/* IOException.java -- Generic input/output exception + Copyright (C) 1998, 1999, 2001, 2002, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This exception is thrown to indicate an I/O problem of some sort + * occurred. Since this is a fairly generic exception, often a subclass + * of IOException will actually be thrown in order to provide a more + * detailed indication of what happened. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + * @status updated to 1.4 + */ +public class IOException extends Exception +{ + /** + * Compatible with JDK 1.0+. + */ + private static final long serialVersionUID = 7818375828146090155L; + + /** + * Create an exception without a descriptive error message. + */ + public IOException() + { + } + + /** + * Create an exception with a descriptive error message. + * + * @param message the descriptive error message + */ + public IOException(String message) + { + super(message); + } +} // class IOException diff --git a/libjava/classpath/java/io/InputStream.java b/libjava/classpath/java/io/InputStream.java new file mode 100644 index 000000000..58b3dbd19 --- /dev/null +++ b/libjava/classpath/java/io/InputStream.java @@ -0,0 +1,270 @@ +/* InputStream.java -- Base class for input + Copyright (C) 1998, 1999, 2001, 2004, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This abstract class forms the base of the hierarchy of classes that read + * input as a stream of bytes. It provides a common set of methods for + * reading bytes from streams. Subclasses implement and extend these + * methods to read bytes from a particular input source such as a file + * or network connection. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Warren Levy (warrenl@cygnus.com) + */ +public abstract class InputStream implements Closeable +{ + /** + * Default, no-arg, public constructor + */ + public InputStream() + { + } + + /** + * This method returns the number of bytes that can be read from this + * stream before a read can block. A return of 0 indicates that blocking + * might (or might not) occur on the very next read attempt. + *

+ * This method always returns 0 in this class + * + * @return The number of bytes that can be read before blocking could occur + * + * @exception IOException If an error occurs + */ + public int available() throws IOException + { + return 0; + } + + /** + * This method closes the stream. Any futher attempts to read from the + * stream may generate an IOException + *

+ * This method does nothing in this class, but subclasses may override + * this method in order to provide additional functionality. + * + * @exception IOException If an error occurs, which can only happen + * in a subclass + */ + public void close() throws IOException + { + // Do nothing + } + + /** + * This method marks a position in the input to which the stream can + * be "reset" by calling the reset() method. The + * parameter @code{readlimit} is the number of bytes that can be read + * from the stream after setting the mark before the mark becomes + * invalid. For example, if mark() is called with a + * read limit of 10, then when 11 bytes of data are read from the + * stream before the reset() method is called, then the + * mark is invalid and the stream object instance is not required to + * remember the mark. + *

+ * This method does nothing in this class, but subclasses may override it + * to provide mark/reset functionality. + * + * @param readLimit The number of bytes that can be read before the + * mark becomes invalid + */ + public void mark(int readLimit) + { + // Do nothing + } + + /** + * This method returns a boolean that indicates whether the mark/reset + * methods are supported in this class. Those methods can be used to + * remember a specific point in the stream and reset the stream to that + * point. + *

+ * This method always returns false in this class, but + * subclasses can override this method to return true + * if they support mark/reset functionality. + * + * @return true if mark/reset functionality is + * supported, false otherwise + */ + public boolean markSupported() + { + return false; + } + + /** + * This method reads an unsigned byte from the input stream and returns it + * as an int in the range of 0-255. This method also will return -1 if + * the end of the stream has been reached. + *

+ * This method will block until the byte can be read. + * + * @return The byte read or -1 if end of stream + * + * @exception IOException If an error occurs + */ + public abstract int read() throws IOException; + + /** + * This method reads bytes from a stream and stores them into a caller + * supplied buffer. This method attempts to completely fill the buffer, + * but can return before doing so. The actual number of bytes read is + * returned as an int. A -1 is returned to indicate the end of the stream. + *

+ * This method will block until some data can be read. + *

+ * This method operates by calling an overloaded read method like so: + * read(b, 0, b.length) + * + * @param b The buffer into which the bytes read will be stored. + * + * @return The number of bytes read or -1 if end of stream. + * + * @exception IOException If an error occurs. + */ + public int read(byte[] b) throws IOException + { + return read(b, 0, b.length); + } + + /** + * This method read bytes from a stream and stores them into a + * caller supplied buffer. It starts storing the data at index + * off into the buffer and attempts to read + * len bytes. This method can return before reading the + * number of bytes requested. The actual number of bytes read is + * returned as an int. A -1 is returned to indicate the end of the + * stream. + *

+ * This method will block until some data can be read. + *

+ * This method operates by calling the single byte read() method + * in a loop until the desired number of bytes are read. The read loop + * stops short if the end of the stream is encountered or if an IOException + * is encountered on any read operation except the first. If the first + * attempt to read a bytes fails, the IOException is allowed to propagate + * upward. And subsequent IOException is caught and treated identically + * to an end of stream condition. Subclasses can (and should if possible) + * override this method to provide a more efficient implementation. + * + * @param b The array into which the bytes read should be stored + * @param off The offset into the array to start storing bytes + * @param len The requested number of bytes to read + * + * @return The actual number of bytes read, or -1 if end of stream. + * + * @exception IOException If an error occurs. + */ + public int read(byte[] b, int off, int len) throws IOException + { + if (off < 0 || len < 0 || b.length - off < len) + throw new IndexOutOfBoundsException(); + + int i, ch; + + for (i = 0; i < len; ++i) + try + { + if ((ch = read()) < 0) + return i == 0 ? -1 : i; // EOF + b[off + i] = (byte) ch; + } + catch (IOException ex) + { + // Only reading the first byte should cause an IOException. + if (i == 0) + throw ex; + return i; + } + + return i; + } + + /** + * This method resets a stream to the point where the + * mark() method was called. Any bytes that were read + * after the mark point was set will be re-read during subsequent + * reads. + *

+ * This method always throws an IOException in this class, but subclasses + * can override this method if they provide mark/reset functionality. + * + * @exception IOException Always thrown for this class + */ + public void reset() throws IOException + { + throw new IOException("mark/reset not supported"); + } + + /** + * This method skips the specified number of bytes in the stream. It + * returns the actual number of bytes skipped, which may be less than the + * requested amount. + *

+ * This method reads and discards bytes into a byte array until the + * specified number of bytes were skipped or until either the end of stream + * is reached or a read attempt returns a short count. Subclasses can + * override this metho to provide a more efficient implementation where + * one exists. + * + * @param n The requested number of bytes to skip + * + * @return The actual number of bytes skipped. + * + * @exception IOException If an error occurs + */ + public long skip(long n) throws IOException + { + // Throw away n bytes by reading them into a temp byte[]. + // Limit the temp array to 2Kb so we don't grab too much memory. + final int buflen = n > 2048 ? 2048 : (int) n; + byte[] tmpbuf = new byte[buflen]; + final long origN = n; + + while (n > 0L) + { + int numread = read(tmpbuf, 0, n > buflen ? buflen : (int) n); + if (numread <= 0) + break; + n -= numread; + } + + return origN - n; + } +} diff --git a/libjava/classpath/java/io/InputStreamReader.java b/libjava/classpath/java/io/InputStreamReader.java new file mode 100644 index 000000000..51925a8c5 --- /dev/null +++ b/libjava/classpath/java/io/InputStreamReader.java @@ -0,0 +1,509 @@ +/* InputStreamReader.java -- Reader than transforms bytes to chars + Copyright (C) 1998, 1999, 2001, 2003, 2004, 2005, 2006 + Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +import gnu.classpath.SystemProperties; +import gnu.java.nio.charset.EncodingHelper; + +import java.nio.ByteBuffer; +import java.nio.CharBuffer; +import java.nio.charset.Charset; +import java.nio.charset.CharsetDecoder; +import java.nio.charset.CoderResult; +import java.nio.charset.CodingErrorAction; + +/** + * This class reads characters from a byte input stream. The characters + * read are converted from bytes in the underlying stream by a + * decoding layer. The decoding layer transforms bytes to chars according + * to an encoding standard. There are many available encodings to choose + * from. The desired encoding can either be specified by name, or if no + * encoding is selected, the system default encoding will be used. The + * system default encoding name is determined from the system property + * file.encoding. The only encodings that are guaranteed to + * be availalbe are "8859_1" (the Latin-1 character set) and "UTF8". + * Unforunately, Java does not provide a mechanism for listing the + * ecodings that are supported in a given implementation. + *

+ * Here is a list of standard encoding names that may be available: + *

+ *

+ *

+ * It is recommended that applications do not use + * InputStreamReader's + * directly. Rather, for efficiency purposes, an object of this class + * should be wrapped by a BufferedReader. + *

+ * Due to a deficiency the Java class library design, there is no standard + * way for an application to install its own byte-character encoding. + * + * @see BufferedReader + * @see InputStream + * + * @author Robert Schuster + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Per Bothner (bothner@cygnus.com) + * @date April 22, 1998. + */ +public class InputStreamReader extends Reader +{ + /** + * The input stream. + */ + private InputStream in; + + /** + * The charset decoder. + */ + private CharsetDecoder decoder; + + /** + * End of stream reached. + */ + private boolean isDone = false; + + /** + * Need this. + */ + private float maxBytesPerChar; + + /** + * Buffer holding surplus loaded bytes (if any) + */ + private ByteBuffer byteBuffer; + + /** + * java.io canonical name of the encoding. + */ + private String encoding; + + /** + * We might decode to a 2-char UTF-16 surrogate, which won't fit in the + * output buffer. In this case we need to save the surrogate char. + */ + private char savedSurrogate; + private boolean hasSavedSurrogate = false; + + /** + * A byte array to be reused in read(byte[], int, int). + */ + private byte[] bytesCache; + + /** + * Locks the bytesCache above in read(byte[], int, int). + */ + private Object cacheLock = new Object(); + + /** + * This method initializes a new instance of InputStreamReader + * to read from the specified stream using the default encoding. + * + * @param in The InputStream to read from + */ + public InputStreamReader(InputStream in) + { + if (in == null) + throw new NullPointerException(); + this.in = in; + try + { + encoding = SystemProperties.getProperty("file.encoding"); + // Don't use NIO if avoidable + if(EncodingHelper.isISOLatin1(encoding)) + { + encoding = "ISO8859_1"; + maxBytesPerChar = 1f; + decoder = null; + return; + } + Charset cs = EncodingHelper.getCharset(encoding); + decoder = cs.newDecoder(); + encoding = EncodingHelper.getOldCanonical(cs.name()); + try { + maxBytesPerChar = cs.newEncoder().maxBytesPerChar(); + } catch(UnsupportedOperationException _){ + maxBytesPerChar = 1f; + } + decoder.onMalformedInput(CodingErrorAction.REPLACE); + decoder.onUnmappableCharacter(CodingErrorAction.REPLACE); + decoder.reset(); + } catch(RuntimeException e) { + encoding = "ISO8859_1"; + maxBytesPerChar = 1f; + decoder = null; + } catch(UnsupportedEncodingException e) { + encoding = "ISO8859_1"; + maxBytesPerChar = 1f; + decoder = null; + } + } + + /** + * This method initializes a new instance of InputStreamReader + * to read from the specified stream using a caller supplied character + * encoding scheme. Note that due to a deficiency in the Java language + * design, there is no way to determine which encodings are supported. + * + * @param in The InputStream to read from + * @param encoding_name The name of the encoding scheme to use + * + * @exception UnsupportedEncodingException If the encoding scheme + * requested is not available. + */ + public InputStreamReader(InputStream in, String encoding_name) + throws UnsupportedEncodingException + { + if (in == null + || encoding_name == null) + throw new NullPointerException(); + + this.in = in; + // Don't use NIO if avoidable + if(EncodingHelper.isISOLatin1(encoding_name)) + { + encoding = "ISO8859_1"; + maxBytesPerChar = 1f; + decoder = null; + return; + } + try { + Charset cs = EncodingHelper.getCharset(encoding_name); + try { + maxBytesPerChar = cs.newEncoder().maxBytesPerChar(); + } catch(UnsupportedOperationException _){ + maxBytesPerChar = 1f; + } + + decoder = cs.newDecoder(); + decoder.onMalformedInput(CodingErrorAction.REPLACE); + decoder.onUnmappableCharacter(CodingErrorAction.REPLACE); + decoder.reset(); + + // The encoding should be the old name, if such exists. + encoding = EncodingHelper.getOldCanonical(cs.name()); + } catch(RuntimeException e) { + encoding = "ISO8859_1"; + maxBytesPerChar = 1f; + decoder = null; + } + } + + /** + * Creates an InputStreamReader that uses a decoder of the given + * charset to decode the bytes in the InputStream into + * characters. + * + * @since 1.4 + */ + public InputStreamReader(InputStream in, Charset charset) { + if (in == null) + throw new NullPointerException(); + this.in = in; + decoder = charset.newDecoder(); + + try { + maxBytesPerChar = charset.newEncoder().maxBytesPerChar(); + } catch(UnsupportedOperationException _){ + maxBytesPerChar = 1f; + } + + decoder.onMalformedInput(CodingErrorAction.REPLACE); + decoder.onUnmappableCharacter(CodingErrorAction.REPLACE); + decoder.reset(); + encoding = EncodingHelper.getOldCanonical(charset.name()); + } + + /** + * Creates an InputStreamReader that uses the given charset decoder + * to decode the bytes in the InputStream into characters. + * + * @since 1.4 + */ + public InputStreamReader(InputStream in, CharsetDecoder decoder) { + if (in == null) + throw new NullPointerException(); + this.in = in; + this.decoder = decoder; + + Charset charset = decoder.charset(); + try { + if (charset == null) + maxBytesPerChar = 1f; + else + maxBytesPerChar = charset.newEncoder().maxBytesPerChar(); + } catch(UnsupportedOperationException _){ + maxBytesPerChar = 1f; + } + + decoder.onMalformedInput(CodingErrorAction.REPLACE); + decoder.onUnmappableCharacter(CodingErrorAction.REPLACE); + decoder.reset(); + if (charset == null) + encoding = "US-ASCII"; + else + encoding = EncodingHelper.getOldCanonical(decoder.charset().name()); + } + + /** + * This method closes this stream, as well as the underlying + * InputStream. + * + * @exception IOException If an error occurs + */ + public void close() throws IOException + { + synchronized (lock) + { + // Makes sure all intermediate data is released by the decoder. + if (decoder != null) + decoder.reset(); + if (in != null) + in.close(); + in = null; + isDone = true; + decoder = null; + } + } + + /** + * This method returns the name of the encoding that is currently in use + * by this object. If the stream has been closed, this method is allowed + * to return null. + * + * @return The current encoding name + */ + public String getEncoding() + { + return in != null ? encoding : null; + } + + /** + * This method checks to see if the stream is ready to be read. It + * will return true if is, or false if it is not. + * If the stream is not ready to be read, it could (although is not required + * to) block on the next read attempt. + * + * @return true if the stream is ready to be read, + * false otherwise + * + * @exception IOException If an error occurs + */ + public boolean ready() throws IOException + { + if (in == null) + throw new IOException("Reader has been closed"); + + return in.available() != 0; + } + + /** + * This method reads up to length characters from the stream into + * the specified array starting at index offset into the + * array. + * + * @param buf The character array to recieve the data read + * @param offset The offset into the array to start storing characters + * @param length The requested number of characters to read. + * + * @return The actual number of characters read, or -1 if end of stream. + * + * @exception IOException If an error occurs + */ + public int read(char[] buf, int offset, int length) throws IOException + { + if (in == null) + throw new IOException("Reader has been closed"); + if (isDone) + return -1; + if(decoder != null) + { + int totalBytes = (int)((double) length * maxBytesPerChar); + if (byteBuffer != null) + totalBytes = Math.max(totalBytes, byteBuffer.remaining()); + byte[] bytes; + // Fetch cached bytes array if available and big enough. + synchronized(cacheLock) + { + bytes = bytesCache; + if (bytes == null || bytes.length < totalBytes) + bytes = new byte[totalBytes]; + else + bytesCache = null; + } + + int remaining = 0; + if(byteBuffer != null) + { + remaining = byteBuffer.remaining(); + byteBuffer.get(bytes, 0, remaining); + } + int read; + if(totalBytes - remaining > 0) + { + read = in.read(bytes, remaining, totalBytes - remaining); + if(read == -1){ + read = remaining; + isDone = true; + } else + read += remaining; + } else + read = remaining; + byteBuffer = ByteBuffer.wrap(bytes, 0, read); + CharBuffer cb = CharBuffer.wrap(buf, offset, length); + int startPos = cb.position(); + + if(hasSavedSurrogate){ + hasSavedSurrogate = false; + cb.put(savedSurrogate); + read++; + } + + CoderResult cr = decoder.decode(byteBuffer, cb, isDone); + decoder.reset(); + // 1 char remains which is the first half of a surrogate pair. + if(cr.isOverflow() && cb.hasRemaining()){ + CharBuffer overflowbuf = CharBuffer.allocate(2); + cr = decoder.decode(byteBuffer, overflowbuf, isDone); + overflowbuf.flip(); + if(overflowbuf.hasRemaining()) + { + cb.put(overflowbuf.get()); + savedSurrogate = overflowbuf.get(); + hasSavedSurrogate = true; + isDone = false; + } + } + + if(byteBuffer.hasRemaining()) { + byteBuffer.compact(); + byteBuffer.flip(); + isDone = false; + } else + byteBuffer = null; + + read = cb.position() - startPos; + + // Put cached bytes array back if we are finished and the cache + // is null or smaller than the used bytes array. + synchronized (cacheLock) + { + if (byteBuffer == null + && (bytesCache == null || bytesCache.length < bytes.length)) + bytesCache = bytes; + } + return (read <= 0) ? -1 : read; + } + else + { + byte[] bytes; + // Fetch cached bytes array if available and big enough. + synchronized (cacheLock) + { + bytes = bytesCache; + if (bytes == null || length < bytes.length) + bytes = new byte[length]; + else + bytesCache = null; + } + + int read = in.read(bytes); + for(int i=0;i + * This method will block until the char can be read. + * + * @return The char read or -1 if end of stream + * + * @exception IOException If an error occurs + */ + public int read() throws IOException + { + char[] buf = new char[1]; + int count = read(buf, 0, 1); + return count > 0 ? buf[0] : -1; + } + + /** + * Skips the specified number of chars in the stream. It + * returns the actual number of chars skipped, which may be less than the + * requested amount. + * + * @param count The requested number of chars to skip + * + * @return The actual number of chars skipped. + * + * @exception IOException If an error occurs + */ + public long skip(long count) throws IOException + { + if (in == null) + throw new IOException("Reader has been closed"); + + return super.skip(count); + } +} diff --git a/libjava/classpath/java/io/InterruptedIOException.java b/libjava/classpath/java/io/InterruptedIOException.java new file mode 100644 index 000000000..96ec83649 --- /dev/null +++ b/libjava/classpath/java/io/InterruptedIOException.java @@ -0,0 +1,94 @@ +/* InterruptedIOException.java -- an I/O operation was interrupted + Copyright (C) 1998, 1999, 2001, 2002, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This exception is thrown when a in process I/O operation is interrupted + * for some reason. The field bytesTransferred will contain the number of + * bytes that were read/written prior to the interruption. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + * @see Thread#interrupt() + * @status updated to 1.4 + */ +public class InterruptedIOException extends IOException +{ + /** + * Compatible with JDK 1.0+. + */ + private static final long serialVersionUID = 4020568460727500567L; + + /** + * The number of bytes read/written prior to the interruption. + * + * @serial count of bytes successfully transferred + */ + public int bytesTransferred; + + /** + * Create an extends without a descriptive error message. + */ + public InterruptedIOException() + { + } + + /** + * Create an exception with a descriptive error message. + * + * @param message the descriptive error message + */ + public InterruptedIOException(String message) + { + super(message); + } + + /** + * Create an exception with a descriptive error message and count of + * bytes transferred. + * + * @param message the descriptive error message + * @param bytesTransferred number of bytes tranferred before interruption + */ + InterruptedIOException(String message, int bytesTransferred) + { + super(message); + this.bytesTransferred = bytesTransferred; + } +} // class InterruptedIOException diff --git a/libjava/classpath/java/io/InvalidClassException.java b/libjava/classpath/java/io/InvalidClassException.java new file mode 100644 index 000000000..e31a44f2d --- /dev/null +++ b/libjava/classpath/java/io/InvalidClassException.java @@ -0,0 +1,110 @@ +/* InvalidClassException.java -- deserializing a class failed + Copyright (C) 1998, 2002 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This exception is thrown when there is some sort of problem with a + * class during a serialization operation. This could be:

. + * + *

The field classname will contain the name of the + * class that caused the problem if known. The getMessage() method + * for this exception will always include the name of that class + * if known. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @since 1.1 + * @status updated to 1.4 + */ +public class InvalidClassException extends ObjectStreamException +{ + /** + * Compatible with JDK 1.1+. + */ + private static final long serialVersionUID = -4333316296251054416L; + + /** + * The name of the class which encountered the error. + * + * @serial the classname causing the error + */ + public String classname; + + /** + * Create an exception with a descriptive error message, but a null + * classname. + * + * @param message the descriptive error message + */ + public InvalidClassException(String message) + { + super(message); + } + + /** + * Create an exception with a descriptive error message, and the name of + * the class that caused the problem. + * + * @param classname the name of the faulty class + * @param message the descriptive error message + */ + public InvalidClassException(String classname, String message) + { + super(message); + this.classname = classname; + } + + /** + * Returns the descriptive error message for this exception. It will + * include the class name that caused the problem if known, in the format: + * [classname][; ][super.getMessage()]. + * + * @return A descriptive error message, may be null + */ + public String getMessage() + { + String msg = super.getMessage(); + if (msg == null) + return classname; + return (classname == null ? "" : classname + "; ") + msg; + } +} diff --git a/libjava/classpath/java/io/InvalidObjectException.java b/libjava/classpath/java/io/InvalidObjectException.java new file mode 100644 index 000000000..deee876db --- /dev/null +++ b/libjava/classpath/java/io/InvalidObjectException.java @@ -0,0 +1,66 @@ +/* InvalidObjectException.java -- deserialization failed verification + Copyright (C) 1998, 2002 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This exception is thrown when an object fails a validation test + * during serialization. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @since 1.1 + * @status updated to 1.4 + */ +public class InvalidObjectException extends ObjectStreamException +{ + /** + * Compatible with JDK 1.1+. + */ + private static final long serialVersionUID = 3233174318281839583L; + + /** + * Create an exception with a descriptive error message String. This should + * be the cause of the verification failure. + * + * @param message the descriptive error message + */ + public InvalidObjectException(String message) + { + super(message); + } +} // class InvalidObjectException diff --git a/libjava/classpath/java/io/LineNumberInputStream.java b/libjava/classpath/java/io/LineNumberInputStream.java new file mode 100644 index 000000000..2d8e36202 --- /dev/null +++ b/libjava/classpath/java/io/LineNumberInputStream.java @@ -0,0 +1,315 @@ +/* LineNumberInputStream.java -- An input stream which counts line numbers + Copyright (C) 1998, 1999, 2002, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This class functions like a standard InputStream + * except that it counts line numbers, and canonicalizes newline + * characters. As data is read, whenever the byte sequences "\r", + * "\n", or "\r\n" are encountered, the running line count is + * incremeted by one. Additionally, the whatever line termination + * sequence was encountered will be converted to a "\n" byte. Note + * that this class numbers lines from 0. When the first line + * terminator is encountered, the line number is incremented to 1, and + * so on. + *

+ * This class counts only line termination characters. If the last line + * read from the stream does not end in a line termination sequence, it + * will not be counted as a line. + *

+ * Note that since this class operates as a filter on an underlying + * stream, it has the same mark/reset functionality as the underlying + * stream. The mark() and reset() methods + * in this class handle line numbers correctly. Calling + * reset() resets the line number to the point at which + * mark() was called if the subordinate stream supports + * that functionality. + *

+ * @deprecated This class is deprecated in favor if + * LineNumberReader because it operates on ASCII bytes + * instead of an encoded character stream. This class is for backward + * compatibility only and should not be used in new applications. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Warren Levy (warrenl@cygnus.com) + */ +public class LineNumberInputStream extends FilterInputStream +{ + /** The current line number. */ + private int lineNumber = 0; + + /** The line number when the stream was marked. */ + private int markLineNumber = 0; + + /** Flag to indicate a '\r' was just read so that an immediately + * subsequent '\n' can be ignored. */ + private boolean justReadReturnChar = false; + + /** + * Create a new LineNumberInputStream that reads from the + * specified subordinate InputStream + * + * @param in The subordinate InputStream to read from + */ + public LineNumberInputStream(InputStream in) + { + super(in); + } + + /** + * This method returns the number of bytes that can be read from the + * stream before the stream can block. This method is tricky + * because the subordinate InputStream might return + * only "\r\n" characters, which are replaced by a single "\n" + * character by the read() method of this class. So + * this method can only guarantee that in.available() / + * 2 bytes can actually be read before blocking. In + * practice, considerably more bytes might be read before blocking + *

+ * Note that the stream may not block if additional bytes beyond the count + * returned by this method are read. + * + * @return The number of bytes that can be read before blocking could occur + * + * @exception IOException If an error occurs + */ + public int available() throws IOException + { + // We can only guarantee half the characters that might be available + // without blocking because "\r\n" is treated as a single character. + return in.available() / 2; + } + + /** + * This method returns the current line number + * + * @return The current line number + */ + public int getLineNumber() + { + return lineNumber; + } + + /** + * This method marks a position in the input to which the stream can + * be "reset" byte calling the reset() method. The + * parameter readlimit is the number of bytes that can + * be read from the stream after setting the mark before the mark + * becomes invalid. For example, if mark() is called + * with a read limit of 10, then when 11 bytes of data are read from + * the stream before the reset() method is called, then + * the mark is invalid and the stream object instance is not + * required to remember the mark. + *

+ * In this class, this method will remember the current line number + * as well as the current position in the stream. When the + * reset() method is called, the line number will be + * restored to the saved line number in addition to the stream + * position. + *

+ * This method only works if the subordinate stream supports mark/reset + * functionality. + * + * @param readlimit The number of bytes that can be read before the + * mark becomes invalid + */ + public void mark(int readlimit) + { + in.mark(readlimit); + markLineNumber = lineNumber; + } + + /** + * This method reads an unsigned byte from the input stream and returns it + * as an int in the range of 0-255. This method will return -1 if the + * end of the stream has been reached. + *

+ * Note that if a line termination sequence is encountered (ie, "\r", + * "\n", or "\r\n") then that line termination sequence is converted to + * a single "\n" value which is returned from this method. This means + * that it is possible this method reads two bytes from the subordinate + * stream instead of just one. + *

+ * Note that this method will block until a byte of data is available + * to be read. + * + * @return The byte read or -1 if end of stream + * + * @exception IOException If an error occurs + */ + public int read() throws IOException + { + // Treat "\r\n" as a single character. A '\r' may have been read by + // a previous call to read so we keep an internal flag to avoid having + // to read ahead. + + int ch = in.read(); + + if (ch == '\n') + if (justReadReturnChar) + { + ch = in.read(); + justReadReturnChar = false; + } + else + lineNumber++; + else if (ch == '\r') + { + ch = '\n'; + justReadReturnChar = true; + lineNumber++; + } + else + justReadReturnChar = false; + + return ch; + } + + /** + * This method reads bytes from a stream and stores them into a caller + * supplied buffer. It starts storing data at index offset into + * the buffer and attemps to read len bytes. This method can + * return before reading the number of bytes requested. The actual number + * of bytes read is returned as an int. A -1 is returned to indicated the + * end of the stream. + *

+ * This method will block until some data can be read. + *

+ * Note that if a line termination sequence is encountered (ie, "\r", + * "\n", or "\r\n") then that line termination sequence is converted to + * a single "\n" value which is stored in the buffer. Only a single + * byte is counted towards the number of bytes read in this case. + * + * @param b The array into which the bytes read should be stored + * @param off The offset into the array to start storing bytes + * @param len The requested number of bytes to read + * + * @return The actual number of bytes read, or -1 if end of stream + * + * @exception IOException If an error occurs. + */ + public int read(byte[] b, int off, int len) throws IOException + { + if (off < 0 || len < 0 || off + len > b.length) + throw new ArrayIndexOutOfBoundsException(); + + // This case always succeeds. + if (len == 0) + return 0; + + // The simplest, though not necessarily the most time efficient thing + // to do is simply call read(void) len times. Since this is a deprecated + // class, that should be ok. + final int origOff = off; + while (len-- > 0) + { + int ch = read(); + if (ch < 0) + break; + + b[off++] = (byte) ch; + } + + // This is safe since we already know that some bytes were + // actually requested. + return off == origOff ? -1 : off - origOff; + } + + /** + * This method resets a stream to the point where the + * mark() method was called. Any bytes that were read + * after the mark point was set will be re-read during subsequent + * reads. + *

+ * In this class, this method will also restore the line number that was + * current when the mark() method was called. + *

+ * This method only works if the subordinate stream supports mark/reset + * functionality. + * + * @exception IOException If an error occurs + */ + public void reset() throws IOException + { + in.reset(); + lineNumber = markLineNumber; + justReadReturnChar = false; + } + + /** + * This method sets the current line number to the specified value. + * + * @param lineNumber The new line number + */ + public void setLineNumber(int lineNumber) + { + this.lineNumber = lineNumber; + } + + /** + * This method skips up to the requested number of bytes in the + * input stream. The actual number of bytes skipped is returned. If the + * desired number of bytes to skip is negative, no bytes are skipped. + * + * @param n requested number of bytes to skip. + * + * @return The actual number of bytes skipped. + * + * @exception IOException If an error occurs. + */ + public long skip(long n) throws IOException + { + if (n <= 0) + return 0L; + + final long origN = n; + + do + { + int ch = read(); + if (ch < 0) + break; + if (ch == '\n' || ch == '\r') + lineNumber++; + } + while (--n > 0); + + return origN - n; + } +} diff --git a/libjava/classpath/java/io/LineNumberReader.java b/libjava/classpath/java/io/LineNumberReader.java new file mode 100644 index 000000000..6ac0b55fe --- /dev/null +++ b/libjava/classpath/java/io/LineNumberReader.java @@ -0,0 +1,416 @@ +/* LineNumberReader.java -- A character input stream which counts line numbers + Copyright (C) 1998, 1999, 2001, 2003, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package java.io; + +/** + * This class functions like a standard Reader except that it + * counts line numbers, and canonicalizes newline characters. As data + * is read, whenever the char sequences "\r", "\n", or "\r\n" are encountered, + * the running line count is incremeted by one. Additionally, the whatever + * line termination sequence was encountered will be converted to a "\n" + * char. Note that this class numbers lines from 0. When the first + * line terminator is encountered, the line number is incremented to 1, and + * so on. Also note that actual "\r" and "\n" characters are looked for. + * The system dependent line separator sequence is ignored. + *

+ * This class counts only line termination characters. If the last line + * read from the stream does not end in a line termination sequence, it + * will not be counted as a line. + * + * @author Per Bothner (bothner@cygnus.com) + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Guilhem Lavaux (guilhem@kaffe.org) + * @date December 28, 2003. + */ +/* Written using "Java Class Libraries", 2nd edition, plus online + * API docs for JDK 1.2 beta from http://www.javasoft.com. + * Status: Believed complete and correct. + * + * This implementation has the feature that if '\r' is read, it + * does not look for a '\n', but immediately returns '\n'. + * On the next read(), if a '\n' is read, it is skipped. + * This has the advantage that we do not read (and hang) unnecessarily. + * + * This implementation is also minimal in the number of fields it uses. + */ +public class LineNumberReader extends BufferedReader +{ + /** The current line number. */ + private int lineNumber; + /** Whether we already found a new line in the former call. */ + private boolean matchedNewLine; + /** The saved line number when calling mark() */ + private int savedLineNumber; + + /** + * Create a new LineNumberReader that reads from the + * specified subordinate Reader. A default 8K char sized + * buffer will be used for reads. + * + * @param in The subordinate Reader to read from + */ + public LineNumberReader(Reader in) + { + super(in, DEFAULT_BUFFER_SIZE); + } + + /** + * This method initializes a new LineNumberReader to read + * from the specified subordinate Reader using the specified + * read buffer size. + * + * @param in The subordinate Reader to read from + * @param size The buffer size to use for reading + */ + public LineNumberReader(Reader in, int size) + { + super(in, size); + } + + /** + * This method returns the current line number + * + * @return The current line number + */ + public int getLineNumber() + { + return lineNumber; + } + + /** + * This method sets the current line number to the specified value. + * + * @param lineNumber The new line number + */ + public void setLineNumber(int lineNumber) + { + this.lineNumber = lineNumber; + } + + /** + * This method marks a position in the input to which the stream can be + * "reset" char calling the reset() method. The parameter + * readlimit is the number of chars that can be read from the + * stream after setting the mark before the mark becomes invalid. For + * example, if mark() is called with a read limit of 10, + * then when + * 11 chars of data are read from the stream before the reset() + * method is called, then the mark is invalid and the stream object + * instance is not required to remember the mark. + *

+ * In this class, this method will remember the current line number as well + * as the current position in the stream. When the reset() + * method + * is called, the line number will be restored to the saved line number in + * addition to the stream position. + * + * @param readLimit The number of chars that can be read before the + * mark becomes invalid + * + * @exception IOException If an error occurs + */ + public void mark(int readLimit) throws IOException + { + if (readLimit < 0) + throw new IllegalArgumentException("Read-ahead limit is negative"); + + synchronized (lock) + { + // This is basically the same as BufferedReader.mark. + // However, if the previous character was a '\r', we need to + // save that 'r', in case the next character is a '\n'. + if (pos + readLimit > limit) + { + int saveCR = matchedNewLine ? 1 : 0; + char[] old_buffer = buffer; + if (readLimit > limit) + buffer = new char[saveCR + readLimit]; + int copy_start = pos - saveCR; + savedLineNumber = lineNumber; + limit -= copy_start; + System.arraycopy(old_buffer, copy_start, buffer, 0, limit); + pos = saveCR; + } + markPos = pos; + } + } + + /** + * This method resets a stream to the point where the mark() + * method + * was called. Any chars that were read after the mark point was set will + * be re-read during subsequent reads. + *

+ * In this class, this method will also restore the line number that was + * current when the mark() method was called. + * + * @exception IOException If an error occurs + */ + public void reset() throws IOException + { + synchronized (lock) + { + if (markPos < 0) + throw new IOException("mark never set or invalidated"); + lineNumber = savedLineNumber; + pos = markPos; + matchedNewLine = (markPos > 0 && buffer[markPos-1] == '\r'); + } + } + + /** + * This private method fills the input buffer whatever pos is. + * Consequently pos should be checked before calling this method. + * + * @return the number of bytes actually read from the input stream or + * -1 if end of stream. + * @exception IOException If an error occurs. + */ + private int fill() throws IOException + { + if (markPos >= 0 && limit == buffer.length) + markPos = -1; + if (markPos < 0) + pos = limit = 0; + int count = in.read(buffer, limit, buffer.length - limit); + if (count <= 0) + return -1; + limit += count; + + return count; + } + + /** + * This method reads an unsigned char from the input stream and returns it + * as an int in the range of 0-65535. This method will return -1 if the + * end of the stream has been reached. + *

+ * Note that if a line termination sequence is encountered (ie, "\r", + * "\n", or "\r\n") then that line termination sequence is converted to + * a single "\n" value which is returned from this method. This means + * that it is possible this method reads two chars from the subordinate + * stream instead of just one. + *

+ * Note that this method will block until a char of data is available + * to be read. + * + * @return The char read or -1 if end of stream + * + * @exception IOException If an error occurs + */ + public int read() throws IOException + { + synchronized (lock) + { + skipRedundantLF(); + if (pos >= limit && fill() < 0) + return -1; + char ch = buffer[pos++]; + + if ((matchedNewLine = (ch == '\r')) || ch == '\n') + { + lineNumber++; + return '\n'; + } + matchedNewLine = false; + return (int) ch; + } + } + + /** + * This method reads chars from a stream and stores them into a caller + * supplied buffer. It starts storing data at index offset into + * the buffer and attemps to read len chars. This method can + * return before reading the number of chars requested. The actual number + * of chars read is returned as an int. A -1 is returned to indicated the + * end of the stream. + *

+ * This method will block until some data can be read. + *

+ * Note that if a line termination sequence is encountered (ie, "\r", + * "\n", or "\r\n") then that line termination sequence is converted to + * a single "\n" value which is stored in the buffer. Only a single + * char is counted towards the number of chars read in this case. + * + * @param buf The array into which the chars read should be stored + * @param offset The offset into the array to start storing chars + * @param count The requested number of chars to read + * + * @return The actual number of chars read, or -1 if end of stream + * + * @exception IOException If an error occurs. + * @exception NullPointerException If buf is null (in any case). + * @exception IndexOutOfBoundsException If buffer parameters (offset and + * count) lies outside of the buffer capacity. + */ + public int read(char[] buf, int offset, int count) throws IOException + { + if (buf == null) + throw new NullPointerException(); + + if (offset + count > buf.length || offset < 0) + throw new IndexOutOfBoundsException(); + + if (count <= 0) + { + if (count < 0) + throw new IndexOutOfBoundsException(); + return 0; + } + + synchronized (lock) + { + if (pos >= limit && fill() < 0) + return -1; + + int start_offset = offset; + boolean matched = matchedNewLine; + + while (count-- > 0 && pos < limit) + { + char ch = buffer[pos++]; + if (ch == '\r') + { + lineNumber++; + matched = true; + } + else if (ch == '\n' && !matched) + lineNumber++; + else + matched = false; + + buf[offset++] = ch; + } + + matchedNewLine = matched; + return offset - start_offset; + } + } + + private void skipRedundantLF() throws IOException + { + if (pos > 0 && matchedNewLine) + { + if (pos < limit) + { // fast case + if (buffer[pos] == '\n') + pos++; + } + else + { // check whether the next buffer begins with '\n'. + // in that case kill the '\n'. + if (fill() <= 0) + return; + if (buffer[pos] == '\n') + pos++; + } + matchedNewLine = true; + } + } + + /** + * This method reads a line of text from the input stream and returns + * it as a String. A line is considered to be terminated + * by a "\r", "\n", or "\r\n" sequence, not by the system dependent line + * separator. + * + * @return The line read as a String or null + * if end of stream. + * + * @exception IOException If an error occurs + */ + public String readLine() throws IOException + { + // BufferedReader.readLine already does this. Shouldn't need to keep + // track of newlines (since the read method deals with this for us). + // But if the buffer is large, we may not call the read method at all + // and super.readLine can't increment lineNumber itself. + // Though it may seem kludgy, the safest thing to do is to save off + // lineNumber and increment it explicitly when we're done (iff we + // ended with a '\n' or '\r' as opposed to EOF). + // + // Also, we need to undo the special casing done by BufferedReader.readLine + // when a '\r' is the last char in the buffer. That situation is marked + // by 'pos > limit'. + int tmpLineNumber = lineNumber; + skipRedundantLF(); + String str = super.readLine(); + if (pos > limit) + --pos; + + // The only case where you mustn't increment the line number is you are + // at the EOS. + if (str != null) + lineNumber = tmpLineNumber + 1; + + return str; + } + + /** + * This method skips over characters in the stream. This method will + * skip the specified number of characters if possible, but is not required + * to skip them all. The actual number of characters skipped is returned. + * This method returns 0 if the specified number of chars is less than 1. + * + * @param count The specified number of chars to skip. + * + * @return The actual number of chars skipped. + * + * @exception IOException If an error occurs + */ + public long skip (long count) throws IOException + { + if (count < 0) + throw new IllegalArgumentException("skip() value is negative"); + if (count == 0) + return 0; + + int skipped; + char[] buf = new char[1]; + + for (skipped = 0; skipped < count; skipped++) + { + int ch = read(buf, 0, 1); + + if (ch < 0) + break; + } + + return skipped; + } +} diff --git a/libjava/classpath/java/io/NotActiveException.java b/libjava/classpath/java/io/NotActiveException.java new file mode 100644 index 000000000..949ba8eca --- /dev/null +++ b/libjava/classpath/java/io/NotActiveException.java @@ -0,0 +1,72 @@ +/* NotActiveException.java -- thrown when serialization is not active + Copyright (C) 1998, 2002 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This exception is thrown when a problem occurs due to the fact that + * serialization is not active. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @since 1.1 + * @status updated to 1.4 + */ +public class NotActiveException extends ObjectStreamException +{ + /** + * Compatible with JDK 1.1+. + */ + private static final long serialVersionUID = -3893467273049808895L; + + /** + * Create an exception without a descriptive error message. + */ + public NotActiveException() + { + } + + /** + * Create an exception with a descriptive error message. + * + * @param message the descriptive error message + */ + public NotActiveException(String message) + { + super(message); + } +} // class NotActiveException diff --git a/libjava/classpath/java/io/NotSerializableException.java b/libjava/classpath/java/io/NotSerializableException.java new file mode 100644 index 000000000..d49c939e3 --- /dev/null +++ b/libjava/classpath/java/io/NotSerializableException.java @@ -0,0 +1,74 @@ +/* NotSerializableException.java -- a Serializable class that isn't + Copyright (C) 1998, 2002 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This exception is thrown when a class implements Serializable because + * of a superclass, but should not be serialized. The descriptive message + * will consist of the name of the class in question. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @since 1.1 + * @status updated to 1.4 + */ +public class NotSerializableException extends ObjectStreamException +{ + /** + * Compatible with JDK 1.1+. + */ + private static final long serialVersionUID = 2906642554793891381L; + + /** + * Create an exception without a descriptive error message. + */ + public NotSerializableException() + { + } + + /** + * Create an exception with a descriptive error message, which should + * be the name of the class. + * + * @param message the descriptive error message + */ + public NotSerializableException(String message) + { + super(message); + } +} // class NotSerializableException diff --git a/libjava/classpath/java/io/ObjectInput.java b/libjava/classpath/java/io/ObjectInput.java new file mode 100644 index 000000000..f8d51e00d --- /dev/null +++ b/libjava/classpath/java/io/ObjectInput.java @@ -0,0 +1,140 @@ +/* ObjectInput.java -- Read object data from a stream + Copyright (C) 1998,2003 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This interface extends the DataInput interface to provide a + * facility to read objects as well as primitive types from a stream. It + * also has methods that allow input to be done in a manner similar to + * InputStream + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * + * @see DataInput + */ +public interface ObjectInput extends DataInput +{ + /** + * This method returns the number of bytes that can be read without + * blocking. + * + * @return The number of bytes available before blocking + * + * @exception IOException If an error occurs + */ + int available() throws IOException; + + /** + * This method reading a byte of data from a stream. It returns that byte + * as an int. This method blocks if no data is available + * to be read. + * + * @return The byte of data read + * + * @exception IOException If an error occurs + */ + int read() throws IOException; + + /** + * This method reads raw bytes and stores them them a byte array buffer. + * Note that this method will block if no data is available. However, + * it will not necessarily block until it fills the entire buffer. That is, + * a "short count" is possible. + * + * @param buf The byte array to receive the data read + * + * @return The actual number of bytes read or -1 if end of stream + * + * @exception IOException If an error occurs + */ + int read(byte[] buf) throws IOException; + + /** + * This method reads raw bytes and stores them in a byte array buffer + * buf starting at position offset into the + * buffer. A + * maximum of len bytes will be read. Note that this method + * blocks if no data is available, but will not necessarily block until + * it can read len bytes of data. That is, a "short count" is + * possible. + * + * @param buf The byte array to receive the data read + * @param offset The offset into buf to start storing data + * @param len The maximum number of bytes to read + * + * @return The actual number of bytes read or -1 if end of stream + * + * @exception IOException If an error occurs + */ + int read(byte[] buf, int offset, int len) throws IOException; + + /** + * Reads an object instance and returns it. If the class for the object + * being read cannot be found, then a ClassNotFoundException + * will be thrown. + * + * @return The object instance that was read + * + * @exception ClassNotFoundException If a class for the object cannot be + * found + * @exception IOException If any other error occurs + */ + Object readObject() + throws ClassNotFoundException, IOException; + + /** + * This method causes the specified number of bytes to be read and + * discarded. It is possible that fewer than the requested number of bytes + * will actually be skipped. + * + * @param numBytes The number of bytes to skip + * + * @return The actual number of bytes skipped + * + * @exception IOException If an error occurs + */ + long skip(long numBytes) throws IOException; + + /** + * This method closes the input source + * + * @exception IOException If an error occurs + */ + void close() throws IOException; +} diff --git a/libjava/classpath/java/io/ObjectInputStream.java b/libjava/classpath/java/io/ObjectInputStream.java new file mode 100644 index 000000000..c37f7665f --- /dev/null +++ b/libjava/classpath/java/io/ObjectInputStream.java @@ -0,0 +1,2142 @@ +/* ObjectInputStream.java -- Class used to read serialized objects + Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2006, 2008 + Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +import gnu.classpath.Pair; +import gnu.classpath.VMStackWalker; + +import java.lang.reflect.Array; +import java.lang.reflect.Constructor; +import java.lang.reflect.Field; +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; +import java.lang.reflect.Modifier; +import java.lang.reflect.Proxy; +import java.security.AccessController; +import java.security.PrivilegedAction; +import java.util.HashMap; +import java.util.Hashtable; +import java.util.Iterator; +import java.util.Map; +import java.util.TreeSet; + +/** + * @author Tom Tromey (tromey@redhat.com) + * @author Jeroen Frijters (jeroen@frijters.net) + * @author Guilhem Lavaux (guilhem@kaffe.org) + * @author Michael Koch (konqueror@gmx.de) + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + */ +public class ObjectInputStream extends InputStream + implements ObjectInput, ObjectStreamConstants +{ + /** + * Creates a new ObjectInputStream that will do all of + * its reading from in. This method also checks + * the stream by reading the header information (stream magic number + * and stream version). + * + * @exception IOException Reading stream header from underlying + * stream cannot be completed. + * + * @exception StreamCorruptedException An invalid stream magic + * number or stream version was read from the stream. + * + * @see #readStreamHeader() + */ + public ObjectInputStream(InputStream in) + throws IOException, StreamCorruptedException + { + if (DEBUG) + { + String val = System.getProperty("gcj.dumpobjects"); + if (dump == false && val != null && !val.equals("")) + { + dump = true; + System.out.println ("Serialization debugging enabled"); + } + else if (dump == true && (val == null || val.equals(""))) + { + dump = false; + System.out.println ("Serialization debugging disabled"); + } + } + + this.resolveEnabled = false; + this.blockDataPosition = 0; + this.blockDataBytes = 0; + this.blockData = new byte[BUFFER_SIZE]; + this.blockDataInput = new DataInputStream(this); + this.realInputStream = new DataInputStream(in); + this.nextOID = baseWireHandle; + handles = new HashMap>(); + this.classLookupTable = new Hashtable(); + setBlockDataMode(true); + readStreamHeader(); + } + + + /** + * Returns the next deserialized object read from the underlying stream. + * + * This method can be overriden by a class by implementing + * private void readObject (ObjectInputStream). + * + * If an exception is thrown from this method, the stream is left in + * an undefined state. This method can also throw Errors and + * RuntimeExceptions if caused by existing readResolve() user code. + * + * @return The object read from the underlying stream. + * + * @exception ClassNotFoundException The class that an object being + * read in belongs to cannot be found. + * + * @exception IOException Exception from underlying + * InputStream. + */ + public final Object readObject() + throws ClassNotFoundException, IOException + { + return readObject(true); + } + + /** + *

+ * Returns the next deserialized object read from the + * underlying stream in an unshared manner. Any object + * returned by this method will not be returned by + * subsequent calls to either this method or {@link #readObject()}. + *

+ *

+ * This behaviour is achieved by: + *

+ * + * + * @return a reference to the deserialized object. + * @throws ClassNotFoundException if the class of the object being + * deserialized can not be found. + * @throws StreamCorruptedException if information in the stream + * is inconsistent. + * @throws ObjectStreamException if the next object has already been + * returned by an earlier call to this + * method or {@link #readObject()}. + * @throws OptionalDataException if primitive data occurs next in the stream. + * @throws IOException if an I/O error occurs from the stream. + * @since 1.4 + * @see #readObject() + */ + public Object readUnshared() + throws IOException, ClassNotFoundException + { + return readObject(false); + } + + /** + * Returns the next deserialized object read from the underlying stream. + * + * This method can be overriden by a class by implementing + * private void readObject (ObjectInputStream). + * + * If an exception is thrown from this method, the stream is left in + * an undefined state. This method can also throw Errors and + * RuntimeExceptions if caused by existing readResolve() user code. + * + * @param shared true if handles created by this call should be shared + * with later calls. + * @return The object read from the underlying stream. + * + * @exception ClassNotFoundException The class that an object being + * read in belongs to cannot be found. + * + * @exception IOException Exception from underlying + * InputStream. + */ + private final Object readObject(boolean shared) + throws ClassNotFoundException, IOException + { + if (this.useSubclassMethod) + return readObjectOverride(); + + Object ret_val; + boolean old_mode = setBlockDataMode(false); + byte marker = this.realInputStream.readByte(); + + if (DEBUG) + depth += 2; + + if(dump) dumpElement("MARKER: 0x" + Integer.toHexString(marker) + " "); + + try + { + ret_val = parseContent(marker, shared); + } + finally + { + setBlockDataMode(old_mode); + if (DEBUG) + depth -= 2; + } + + return ret_val; + } + + /** + * Handles a content block within the stream, which begins with a marker + * byte indicating its type. + * + * @param marker the byte marker. + * @param shared true if handles created by this call should be shared + * with later calls. + * @return an object which represents the parsed content. + * @throws ClassNotFoundException if the class of an object being + * read in cannot be found. + * @throws IOException if invalid data occurs or one is thrown by the + * underlying InputStream. + */ + private Object parseContent(byte marker, boolean shared) + throws ClassNotFoundException, IOException + { + Object ret_val; + boolean is_consumed = false; + + switch (marker) + { + case TC_ENDBLOCKDATA: + { + ret_val = null; + is_consumed = true; + break; + } + + case TC_BLOCKDATA: + case TC_BLOCKDATALONG: + { + if (marker == TC_BLOCKDATALONG) + { if(dump) dumpElementln("BLOCKDATALONG"); } + else + { if(dump) dumpElementln("BLOCKDATA"); } + readNextBlock(marker); + } + + case TC_NULL: + { + if(dump) dumpElementln("NULL"); + ret_val = null; + break; + } + + case TC_REFERENCE: + { + if(dump) dumpElement("REFERENCE "); + int oid = realInputStream.readInt(); + if(dump) dumpElementln(Integer.toHexString(oid)); + ret_val = lookupHandle(oid); + if (!shared) + throw new + InvalidObjectException("References can not be read unshared."); + break; + } + + case TC_CLASS: + { + if(dump) dumpElementln("CLASS"); + ObjectStreamClass osc = (ObjectStreamClass)readObject(); + Class clazz = osc.forClass(); + assignNewHandle(clazz,shared); + ret_val = clazz; + break; + } + + case TC_PROXYCLASSDESC: + { + if(dump) dumpElementln("PROXYCLASS"); + +/* GCJ LOCAL */ + // The grammar at this point is + // TC_PROXYCLASSDESC newHandle proxyClassDescInfo + // i.e. we have to assign the handle immediately after + // reading the marker. + int handle = assignNewHandle("Dummy proxy",shared); +/* END GCJ LOCAL */ + + int n_intf = this.realInputStream.readInt(); + String[] intfs = new String[n_intf]; + for (int i = 0; i < n_intf; i++) + { + intfs[i] = this.realInputStream.readUTF(); + } + + boolean oldmode = setBlockDataMode(true); + Class cl = resolveProxyClass(intfs); + setBlockDataMode(oldmode); + + ObjectStreamClass osc = lookupClass(cl); + if (osc.firstNonSerializableParentConstructor == null) + { + osc.realClassIsSerializable = true; + osc.fields = osc.fieldMapping = new ObjectStreamField[0]; + try + { + osc.firstNonSerializableParentConstructor = + Object.class.getConstructor(new Class[0]); + } + catch (NoSuchMethodException x) + { + throw (InternalError) + new InternalError("Object ctor missing").initCause(x); + } + } +/* GCJ LOCAL */ + rememberHandle(osc,shared,handle); +/* END GCJ LOCAL */ + + if (!is_consumed) + { + byte b = this.realInputStream.readByte(); + if (b != TC_ENDBLOCKDATA) + throw new IOException("Data annotated to class was not consumed." + b); + } + else + is_consumed = false; + ObjectStreamClass superosc = (ObjectStreamClass)readObject(); + osc.setSuperclass(superosc); + ret_val = osc; + break; + } + + case TC_CLASSDESC: + { + ObjectStreamClass osc = readClassDescriptor(); + + if (!is_consumed) + { + byte b = this.realInputStream.readByte(); + if (b != TC_ENDBLOCKDATA) + throw new IOException("Data annotated to class was not consumed." + b); + } + else + is_consumed = false; + + osc.setSuperclass ((ObjectStreamClass)readObject()); + ret_val = osc; + break; + } + + case TC_STRING: + { + if(dump) dumpElement("STRING="); + String s = this.realInputStream.readUTF(); + if(dump) dumpElementln(s); + ret_val = processResolution(null, s, assignNewHandle(s,shared), + shared); + break; + } + + case TC_LONGSTRING: + { + if(dump) dumpElement("STRING="); + String s = this.realInputStream.readUTFLong(); + if(dump) dumpElementln(s); + ret_val = processResolution(null, s, assignNewHandle(s,shared), + shared); + break; + } + + case TC_ARRAY: + { + if(dump) dumpElementln("ARRAY"); + ObjectStreamClass osc = (ObjectStreamClass)readObject(); + Class componentType = osc.forClass().getComponentType(); + if(dump) dumpElement("ARRAY LENGTH="); + int length = this.realInputStream.readInt(); + if(dump) dumpElementln (length + "; COMPONENT TYPE=" + componentType); + Object array = Array.newInstance(componentType, length); + int handle = assignNewHandle(array,shared); + readArrayElements(array, componentType); + if(dump) + for (int i = 0, len = Array.getLength(array); i < len; i++) + dumpElementln(" ELEMENT[" + i + "]=", Array.get(array, i)); + ret_val = processResolution(null, array, handle, shared); + break; + } + + case TC_OBJECT: + { + if(dump) dumpElementln("OBJECT"); + ObjectStreamClass osc = (ObjectStreamClass)readObject(); + Class clazz = osc.forClass(); + + if (!osc.realClassIsSerializable) + throw new NotSerializableException + (clazz + " is not Serializable, and thus cannot be deserialized."); + + if (osc.realClassIsExternalizable) + { + Externalizable obj = osc.newInstance(); + + int handle = assignNewHandle(obj,shared); + + boolean read_from_blocks = ((osc.getFlags() & SC_BLOCK_DATA) != 0); + + boolean oldmode = this.readDataFromBlock; + if (read_from_blocks) + setBlockDataMode(true); + + obj.readExternal(this); + + if (read_from_blocks) + { + setBlockDataMode(oldmode); + if (!oldmode) + if (this.realInputStream.readByte() != TC_ENDBLOCKDATA) + throw new IOException("No end of block data seen for class with readExternal (ObjectInputStream) method."); + } + + ret_val = processResolution(osc, obj, handle,shared); + break; + + } // end if (osc.realClassIsExternalizable) + + Object obj = newObject(clazz, osc.firstNonSerializableParentConstructor); + + int handle = assignNewHandle(obj,shared); + Object prevObject = this.currentObject; + ObjectStreamClass prevObjectStreamClass = this.currentObjectStreamClass; + TreeSet prevObjectValidators = + this.currentObjectValidators; + + this.currentObject = obj; + this.currentObjectValidators = null; + ObjectStreamClass[] hierarchy = hierarchy(clazz); + + for (int i = 0; i < hierarchy.length; i++) + { + this.currentObjectStreamClass = hierarchy[i]; + if(dump) dumpElementln("Reading fields of " + this.currentObjectStreamClass.getName ()); + + // XXX: should initialize fields in classes in the hierarchy + // that aren't in the stream + // should skip over classes in the stream that aren't in the + // real classes hierarchy + + Method readObjectMethod = this.currentObjectStreamClass.readObjectMethod; + if (readObjectMethod != null) + { + fieldsAlreadyRead = false; + boolean oldmode = setBlockDataMode(true); + callReadMethod(readObjectMethod, this.currentObjectStreamClass.forClass(), obj); + setBlockDataMode(oldmode); + } + else + { + readFields(obj, currentObjectStreamClass); + } + + if (this.currentObjectStreamClass.hasWriteMethod()) + { + if(dump) dumpElement("ENDBLOCKDATA? "); + try + { + /* Read blocks until an end marker */ + byte writeMarker = this.realInputStream.readByte(); + while (writeMarker != TC_ENDBLOCKDATA) + { + parseContent(writeMarker, shared); + writeMarker = this.realInputStream.readByte(); + } + if(dump) dumpElementln("yes"); + } + catch (EOFException e) + { + throw (IOException) new IOException + ("No end of block data seen for class with readObject (ObjectInputStream) method.").initCause(e); + } + } + } + + this.currentObject = prevObject; + this.currentObjectStreamClass = prevObjectStreamClass; + ret_val = processResolution(osc, obj, handle, shared); + if (currentObjectValidators != null) + invokeValidators(); + this.currentObjectValidators = prevObjectValidators; + + break; + } + + case TC_RESET: + if(dump) dumpElementln("RESET"); + clearHandles(); + ret_val = readObject(); + break; + + case TC_EXCEPTION: + { + if(dump) dumpElement("EXCEPTION="); + Exception e = (Exception)readObject(); + if(dump) dumpElementln(e.toString()); + clearHandles(); + throw new WriteAbortedException("Exception thrown during writing of stream", e); + } + + case TC_ENUM: + { + /* TC_ENUM classDesc newHandle enumConstantName */ + if (dump) + dumpElementln("ENUM="); + ObjectStreamClass osc = (ObjectStreamClass) readObject(); + String constantName = (String) readObject(); + if (dump) + dumpElementln("CONSTANT NAME = " + constantName); + Class clazz = osc.forClass(); + Enum instance = Enum.valueOf(clazz, constantName); + assignNewHandle(instance,shared); + ret_val = instance; + break; + } + + default: + throw new IOException("Unknown marker on stream: " + marker); + } + return ret_val; + } + + /** + * This method makes a partial check of types for the fields + * contained given in arguments. It checks primitive types of + * fields1 against non primitive types of fields2. This method + * assumes the two lists has already been sorted according to + * the Java specification. + * + * @param name Name of the class owning the given fields. + * @param fields1 First list to check. + * @param fields2 Second list to check. + * @throws InvalidClassException if a field in fields1, which has a primitive type, is a present + * in the non primitive part in fields2. + */ + private void checkTypeConsistency(String name, ObjectStreamField[] fields1, ObjectStreamField[] fields2) + throws InvalidClassException + { + int nonPrimitive = 0; + + for (nonPrimitive = 0; + nonPrimitive < fields1.length + && fields1[nonPrimitive].isPrimitive(); nonPrimitive++) + { + } + + if (nonPrimitive == fields1.length) + return; + + int i = 0; + ObjectStreamField f1; + ObjectStreamField f2; + + while (i < fields2.length + && nonPrimitive < fields1.length) + { + f1 = fields1[nonPrimitive]; + f2 = fields2[i]; + + if (!f2.isPrimitive()) + break; + + int compVal = f1.getName().compareTo (f2.getName()); + + if (compVal < 0) + { + nonPrimitive++; + } + else if (compVal > 0) + { + i++; + } + else + { + throw new InvalidClassException + ("invalid field type for " + f2.getName() + + " in class " + name); + } + } + } + + /** + * This method reads a class descriptor from the real input stream + * and use these data to create a new instance of ObjectStreamClass. + * Fields are sorted and ordered for the real read which occurs for + * each instance of the described class. Be aware that if you call that + * method you must ensure that the stream is synchronized, in the other + * case it may be completely desynchronized. + * + * @return A new instance of ObjectStreamClass containing the freshly + * created descriptor. + * @throws ClassNotFoundException if the required class to build the + * descriptor has not been found in the system. + * @throws IOException An input/output error occured. + * @throws InvalidClassException If there was a compatibility problem + * between the class present in the system and the serialized class. + */ + protected ObjectStreamClass readClassDescriptor() + throws ClassNotFoundException, IOException + { + if(dump) dumpElement("CLASSDESC NAME="); + String name = this.realInputStream.readUTF(); + if(dump) dumpElement(name + "; UID="); + long uid = this.realInputStream.readLong (); + if(dump) dumpElement(Long.toHexString(uid) + "; FLAGS="); + byte flags = this.realInputStream.readByte (); + if(dump) dumpElement(Integer.toHexString(flags) + "; FIELD COUNT="); + short field_count = this.realInputStream.readShort(); + if(dump) dumpElementln(Short.toString(field_count)); + ObjectStreamField[] fields = new ObjectStreamField[field_count]; + ObjectStreamClass osc = new ObjectStreamClass(name, uid, + flags, fields); + assignNewHandle(osc,true); + + for (int i = 0; i < field_count; i++) + { + if(dump) dumpElement(" TYPE CODE="); + char type_code = (char)this.realInputStream.readByte(); + if(dump) dumpElement(type_code + "; FIELD NAME="); + String field_name = this.realInputStream.readUTF(); + if(dump) dumpElementln(field_name); + String class_name; + + // If the type code is an array or an object we must + // decode a String here. In the other case we convert + // the type code and pass it to ObjectStreamField. + // Type codes are decoded by gnu.java.lang.reflect.TypeSignature. + if (type_code == 'L' || type_code == '[') + class_name = (String)readObject(); + else + class_name = String.valueOf(type_code); + + fields[i] = + new ObjectStreamField(field_name, class_name); + } + + /* Now that fields have been read we may resolve the class + * (and read annotation if needed). */ + Class clazz = resolveClass(osc); + ClassLoader loader = clazz.getClassLoader(); + for (int i = 0; i < field_count; i++) + { + fields[i].resolveType(loader); + } + boolean oldmode = setBlockDataMode(true); + osc.setClass(clazz, lookupClass(clazz.getSuperclass())); + classLookupTable.put(clazz, osc); + setBlockDataMode(oldmode); + + // find the first non-serializable class in clazz's inheritance hierarchy + Class first_nonserial = clazz.getSuperclass(); + // Maybe it is a primitive class, those don't have a super class, + // or Object itself. Otherwise we can keep getting the superclass + // till we hit the Object class, or some other non-serializable class. + + if (first_nonserial == null) + first_nonserial = clazz; + else + while (Serializable.class.isAssignableFrom(first_nonserial)) + first_nonserial = first_nonserial.getSuperclass(); + + final Class local_constructor_class = first_nonserial; + + osc.firstNonSerializableParentConstructor = + (Constructor)AccessController.doPrivileged(new PrivilegedAction() + { + public Object run() + { + try + { + Constructor c = local_constructor_class. + getDeclaredConstructor(new Class[0]); + if (Modifier.isPrivate(c.getModifiers())) + return null; + return c; + } + catch (NoSuchMethodException e) + { + // error will be reported later, in newObject() + return null; + } + } + }); + + osc.realClassIsSerializable = Serializable.class.isAssignableFrom(clazz); + osc.realClassIsExternalizable = Externalizable.class.isAssignableFrom(clazz); + + ObjectStreamField[] stream_fields = osc.fields; + ObjectStreamField[] real_fields = ObjectStreamClass.lookupForClassObject(clazz).fields; + ObjectStreamField[] fieldmapping = new ObjectStreamField[2 * Math.max(stream_fields.length, real_fields.length)]; + + int stream_idx = 0; + int real_idx = 0; + int map_idx = 0; + + /* + * Check that there is no type inconsistencies between the lists. + * A special checking must be done for the two groups: primitive types and + * not primitive types. + */ + checkTypeConsistency(name, real_fields, stream_fields); + checkTypeConsistency(name, stream_fields, real_fields); + + + while (stream_idx < stream_fields.length + || real_idx < real_fields.length) + { + ObjectStreamField stream_field = null; + ObjectStreamField real_field = null; + + if (stream_idx == stream_fields.length) + { + real_field = real_fields[real_idx++]; + } + else if (real_idx == real_fields.length) + { + stream_field = stream_fields[stream_idx++]; + } + else + { + int comp_val = + real_fields[real_idx].compareTo (stream_fields[stream_idx]); + + if (comp_val < 0) + { + real_field = real_fields[real_idx++]; + } + else if (comp_val > 0) + { + stream_field = stream_fields[stream_idx++]; + } + else + { + stream_field = stream_fields[stream_idx++]; + real_field = real_fields[real_idx++]; + if (stream_field.getType() != real_field.getType()) + throw new InvalidClassException + ("invalid field type for " + real_field.getName() + + " in class " + name); + } + } + + /* If some of stream_fields does not correspond to any of real_fields, + * or the opposite, then fieldmapping will go short. + */ + if (map_idx == fieldmapping.length) + { + ObjectStreamField[] newfieldmapping = + new ObjectStreamField[fieldmapping.length + 2]; + System.arraycopy(fieldmapping, 0, + newfieldmapping, 0, fieldmapping.length); + fieldmapping = newfieldmapping; + } + fieldmapping[map_idx++] = stream_field; + fieldmapping[map_idx++] = real_field; + } + osc.fieldMapping = fieldmapping; + + return osc; + } + + /** + * Reads the current objects non-transient, non-static fields from + * the current class from the underlying output stream. + * + * This method is intended to be called from within a object's + * private void readObject (ObjectInputStream) + * method. + * + * @exception ClassNotFoundException The class that an object being + * read in belongs to cannot be found. + * + * @exception NotActiveException This method was called from a + * context other than from the current object's and current class's + * private void readObject (ObjectInputStream) + * method. + * + * @exception IOException Exception from underlying + * OutputStream. + */ + public void defaultReadObject() + throws ClassNotFoundException, IOException, NotActiveException + { + if (this.currentObject == null || this.currentObjectStreamClass == null) + throw new NotActiveException("defaultReadObject called by non-active" + + " class and/or object"); + + if (fieldsAlreadyRead) + throw new NotActiveException("defaultReadObject called but fields " + + "already read from stream (by " + + "defaultReadObject or readFields)"); + + boolean oldmode = setBlockDataMode(false); + readFields(this.currentObject, this.currentObjectStreamClass); + setBlockDataMode(oldmode); + + fieldsAlreadyRead = true; + } + + + /** + * Registers a ObjectInputValidation to be carried out + * on the object graph currently being deserialized before it is + * returned to the original caller of readObject (). + * The order of validation for multiple + * ObjectInputValidations can be controled using + * priority. Validators with higher priorities are + * called first. + * + * @see java.io.ObjectInputValidation + * + * @exception InvalidObjectException validator is + * null + * + * @exception NotActiveException an attempt was made to add a + * validator outside of the readObject method of the + * object currently being deserialized + */ + public void registerValidation(ObjectInputValidation validator, + int priority) + throws InvalidObjectException, NotActiveException + { + if (this.currentObject == null || this.currentObjectStreamClass == null) + throw new NotActiveException("registerValidation called by non-active " + + "class and/or object"); + + if (validator == null) + throw new InvalidObjectException("attempt to add a null " + + "ObjectInputValidation object"); + + if (currentObjectValidators == null) + currentObjectValidators = new TreeSet(); + + currentObjectValidators.add(new ValidatorAndPriority(validator, priority)); + } + + + /** + * Called when a class is being deserialized. This is a hook to + * allow subclasses to read in information written by the + * annotateClass (Class) method of an + * ObjectOutputStream. + * + * This implementation looks up the active call stack for a + * ClassLoader; if a ClassLoader is found, + * it is used to load the class associated with osc, + * otherwise, the default system ClassLoader is used. + * + * @exception IOException Exception from underlying + * OutputStream. + * + * @see java.io.ObjectOutputStream#annotateClass (java.lang.Class) + */ + protected Class resolveClass(ObjectStreamClass osc) + throws ClassNotFoundException, IOException + { + String name = osc.getName(); + try + { + return Class.forName(name, true, currentLoader()); + } + catch(ClassNotFoundException x) + { + if (name.equals("void")) + return Void.TYPE; + else if (name.equals("boolean")) + return Boolean.TYPE; + else if (name.equals("byte")) + return Byte.TYPE; + else if (name.equals("char")) + return Character.TYPE; + else if (name.equals("short")) + return Short.TYPE; + else if (name.equals("int")) + return Integer.TYPE; + else if (name.equals("long")) + return Long.TYPE; + else if (name.equals("float")) + return Float.TYPE; + else if (name.equals("double")) + return Double.TYPE; + else + throw x; + } + } + + /** + * Returns the most recent user defined ClassLoader on the execution stack + * or null if none is found. + */ + private ClassLoader currentLoader() + { + return VMStackWalker.firstNonNullClassLoader(); + } + + /** + * Lookup a class stored in the local hashtable. If it is not + * use the global lookup function in ObjectStreamClass to build + * the ObjectStreamClass. This method is requested according to + * the behaviour detected in the JDK by Kaffe's team. + * + * @param clazz Class to lookup in the hash table or for which + * we must build a descriptor. + * @return A valid instance of ObjectStreamClass corresponding + * to the specified class. + */ + private ObjectStreamClass lookupClass(Class clazz) + { + if (clazz == null) + return null; + + ObjectStreamClass oclazz; + oclazz = classLookupTable.get(clazz); + if (oclazz == null) + return ObjectStreamClass.lookup(clazz); + else + return oclazz; + } + + /** + * Reconstruct class hierarchy the same way {@link + * java.io.ObjectStreamClass#hierarchy} does but using lookupClass + * instead of ObjectStreamClass.lookup. + * + * @param clazz This is the class for which we want the hierarchy. + * + * @return An array of valid {@link java.io.ObjectStreamClass} instances which + * represent the class hierarchy for clazz. + */ + private ObjectStreamClass[] hierarchy(Class clazz) + { + ObjectStreamClass osc = lookupClass(clazz); + + return osc == null ? new ObjectStreamClass[0] : osc.hierarchy(); + } + + /** + * Allows subclasses to resolve objects that are read from the + * stream with other objects to be returned in their place. This + * method is called the first time each object is encountered. + * + * This method must be enabled before it will be called in the + * serialization process. + * + * @exception IOException Exception from underlying + * OutputStream. + * + * @see #enableResolveObject(boolean) + */ + protected Object resolveObject(Object obj) throws IOException + { + return obj; + } + + + protected Class resolveProxyClass(String[] intfs) + throws IOException, ClassNotFoundException + { + ClassLoader cl = currentLoader(); + + Class[] clss = new Class[intfs.length]; + if(cl == null) + { + for (int i = 0; i < intfs.length; i++) + clss[i] = Class.forName(intfs[i]); + cl = ClassLoader.getSystemClassLoader(); + } + else + for (int i = 0; i < intfs.length; i++) + clss[i] = Class.forName(intfs[i], false, cl); + try + { + return Proxy.getProxyClass(cl, clss); + } + catch (IllegalArgumentException e) + { + throw new ClassNotFoundException(null, e); + } + } + + /** + * If enable is true and this object is + * trusted, then resolveObject (Object) will be called + * in subsequent calls to readObject (Object). + * Otherwise, resolveObject (Object) will not be called. + * + * @exception SecurityException This class is not trusted. + */ + protected boolean enableResolveObject (boolean enable) + throws SecurityException + { + if (enable) + { + SecurityManager sm = System.getSecurityManager(); + if (sm != null) + sm.checkPermission(new SerializablePermission("enableSubstitution")); + } + + boolean old_val = this.resolveEnabled; + this.resolveEnabled = enable; + return old_val; + } + + /** + * Reads stream magic and stream version information from the + * underlying stream. + * + * @exception IOException Exception from underlying stream. + * + * @exception StreamCorruptedException An invalid stream magic + * number or stream version was read from the stream. + */ + protected void readStreamHeader() + throws IOException, StreamCorruptedException + { + if(dump) dumpElement("STREAM MAGIC "); + if (this.realInputStream.readShort() != STREAM_MAGIC) + throw new StreamCorruptedException("Invalid stream magic number"); + + if(dump) dumpElementln("STREAM VERSION "); + if (this.realInputStream.readShort() != STREAM_VERSION) + throw new StreamCorruptedException("Invalid stream version number"); + } + + public int read() throws IOException + { + if (this.readDataFromBlock) + { + if (this.blockDataPosition >= this.blockDataBytes) + readNextBlock(); + return (this.blockData[this.blockDataPosition++] & 0xff); + } + else + return this.realInputStream.read(); + } + + public int read(byte[] data, int offset, int length) throws IOException + { + if (this.readDataFromBlock) + { + int remain = this.blockDataBytes - this.blockDataPosition; + if (remain == 0) + { + readNextBlock(); + remain = this.blockDataBytes - this.blockDataPosition; + } + length = Math.min(length, remain); + System.arraycopy(this.blockData, this.blockDataPosition, + data, offset, length); + this.blockDataPosition += length; + + return length; + } + else + return this.realInputStream.read(data, offset, length); + } + + public int available() throws IOException + { + if (this.readDataFromBlock) + { + if (this.blockDataPosition >= this.blockDataBytes) + readNextBlock (); + + return this.blockDataBytes - this.blockDataPosition; + } + else + return this.realInputStream.available(); + } + + public void close() throws IOException + { + this.realInputStream.close(); + } + + public boolean readBoolean() throws IOException + { + boolean switchmode = true; + boolean oldmode = this.readDataFromBlock; + if (!oldmode || this.blockDataBytes - this.blockDataPosition >= 1) + switchmode = false; + if (switchmode) + oldmode = setBlockDataMode (true); + boolean value = this.dataInputStream.readBoolean (); + if (switchmode) + setBlockDataMode (oldmode); + return value; + } + + public byte readByte() throws IOException + { + boolean switchmode = true; + boolean oldmode = this.readDataFromBlock; + if (!oldmode || this.blockDataBytes - this.blockDataPosition >= 1) + switchmode = false; + if (switchmode) + oldmode = setBlockDataMode(true); + byte value = this.dataInputStream.readByte(); + if (switchmode) + setBlockDataMode(oldmode); + return value; + } + + public int readUnsignedByte() throws IOException + { + boolean switchmode = true; + boolean oldmode = this.readDataFromBlock; + if (!oldmode || this.blockDataBytes - this.blockDataPosition >= 1) + switchmode = false; + if (switchmode) + oldmode = setBlockDataMode(true); + int value = this.dataInputStream.readUnsignedByte(); + if (switchmode) + setBlockDataMode(oldmode); + return value; + } + + public short readShort() throws IOException + { + boolean switchmode = true; + boolean oldmode = this.readDataFromBlock; + if (!oldmode || this.blockDataBytes - this.blockDataPosition >= 2) + switchmode = false; + if (switchmode) + oldmode = setBlockDataMode(true); + short value = this.dataInputStream.readShort(); + if (switchmode) + setBlockDataMode(oldmode); + return value; + } + + public int readUnsignedShort() throws IOException + { + boolean switchmode = true; + boolean oldmode = this.readDataFromBlock; + if (!oldmode || this.blockDataBytes - this.blockDataPosition >= 2) + switchmode = false; + if (switchmode) + oldmode = setBlockDataMode(true); + int value = this.dataInputStream.readUnsignedShort(); + if (switchmode) + setBlockDataMode(oldmode); + return value; + } + + public char readChar() throws IOException + { + boolean switchmode = true; + boolean oldmode = this.readDataFromBlock; + if (!oldmode || this.blockDataBytes - this.blockDataPosition >= 2) + switchmode = false; + if (switchmode) + oldmode = setBlockDataMode(true); + char value = this.dataInputStream.readChar(); + if (switchmode) + setBlockDataMode(oldmode); + return value; + } + + public int readInt() throws IOException + { + boolean switchmode = true; + boolean oldmode = this.readDataFromBlock; + if (!oldmode || this.blockDataBytes - this.blockDataPosition >= 4) + switchmode = false; + if (switchmode) + oldmode = setBlockDataMode(true); + int value = this.dataInputStream.readInt(); + if (switchmode) + setBlockDataMode(oldmode); + return value; + } + + public long readLong() throws IOException + { + boolean switchmode = true; + boolean oldmode = this.readDataFromBlock; + if (!oldmode || this.blockDataBytes - this.blockDataPosition >= 8) + switchmode = false; + if (switchmode) + oldmode = setBlockDataMode(true); + long value = this.dataInputStream.readLong(); + if (switchmode) + setBlockDataMode(oldmode); + return value; + } + + public float readFloat() throws IOException + { + boolean switchmode = true; + boolean oldmode = this.readDataFromBlock; + if (!oldmode || this.blockDataBytes - this.blockDataPosition >= 4) + switchmode = false; + if (switchmode) + oldmode = setBlockDataMode(true); + float value = this.dataInputStream.readFloat(); + if (switchmode) + setBlockDataMode(oldmode); + return value; + } + + public double readDouble() throws IOException + { + boolean switchmode = true; + boolean oldmode = this.readDataFromBlock; + if (!oldmode || this.blockDataBytes - this.blockDataPosition >= 8) + switchmode = false; + if (switchmode) + oldmode = setBlockDataMode(true); + double value = this.dataInputStream.readDouble(); + if (switchmode) + setBlockDataMode(oldmode); + return value; + } + + public void readFully(byte data[]) throws IOException + { + this.dataInputStream.readFully(data); + } + + public void readFully(byte data[], int offset, int size) + throws IOException + { + this.dataInputStream.readFully(data, offset, size); + } + + public int skipBytes(int len) throws IOException + { + return this.dataInputStream.skipBytes(len); + } + + /** + * @deprecated + * @see java.io.DataInputStream#readLine () + */ + public String readLine() throws IOException + { + return this.dataInputStream.readLine(); + } + + public String readUTF() throws IOException + { + return this.dataInputStream.readUTF(); + } + + /** + * This class allows a class to specify exactly which fields should + * be read, and what values should be read for these fields. + * + * XXX: finish up comments + */ + public abstract static class GetField + { + public abstract ObjectStreamClass getObjectStreamClass(); + + public abstract boolean defaulted(String name) + throws IOException, IllegalArgumentException; + + public abstract boolean get(String name, boolean defvalue) + throws IOException, IllegalArgumentException; + + public abstract char get(String name, char defvalue) + throws IOException, IllegalArgumentException; + + public abstract byte get(String name, byte defvalue) + throws IOException, IllegalArgumentException; + + public abstract short get(String name, short defvalue) + throws IOException, IllegalArgumentException; + + public abstract int get(String name, int defvalue) + throws IOException, IllegalArgumentException; + + public abstract long get(String name, long defvalue) + throws IOException, IllegalArgumentException; + + public abstract float get(String name, float defvalue) + throws IOException, IllegalArgumentException; + + public abstract double get(String name, double defvalue) + throws IOException, IllegalArgumentException; + + public abstract Object get(String name, Object defvalue) + throws IOException, IllegalArgumentException; + } + + /** + * This method should be called by a method called 'readObject' in the + * deserializing class (if present). It cannot (and should not)be called + * outside of it. Its goal is to read all fields in the real input stream + * and keep them accessible through the {@link GetField} class. Calling + * this method will not alter the deserializing object. + * + * @return A valid freshly created 'GetField' instance to get access to + * the deserialized stream. + * @throws IOException An input/output exception occured. + * @throws ClassNotFoundException + * @throws NotActiveException + */ + public GetField readFields() + throws IOException, ClassNotFoundException, NotActiveException + { + if (this.currentObject == null || this.currentObjectStreamClass == null) + throw new NotActiveException("readFields called by non-active class and/or object"); + + if (prereadFields != null) + return prereadFields; + + if (fieldsAlreadyRead) + throw new NotActiveException("readFields called but fields already read from" + + " stream (by defaultReadObject or readFields)"); + + final ObjectStreamClass clazz = this.currentObjectStreamClass; + final byte[] prim_field_data = new byte[clazz.primFieldSize]; + final Object[] objs = new Object[clazz.objectFieldCount]; + + // Apparently Block data is not used with GetField as per + // empirical evidence against JDK 1.2. Also see Mauve test + // java.io.ObjectInputOutput.Test.GetPutField. + boolean oldmode = setBlockDataMode(false); + readFully(prim_field_data); + for (int i = 0; i < objs.length; ++ i) + objs[i] = readObject(); + setBlockDataMode(oldmode); + + prereadFields = new GetField() + { + public ObjectStreamClass getObjectStreamClass() + { + return clazz; + } + + public boolean defaulted(String name) + throws IOException, IllegalArgumentException + { + ObjectStreamField f = clazz.getField(name); + + /* First if we have a serialized field use the descriptor */ + if (f != null) + { + /* It is in serialPersistentFields but setClass tells us + * it should not be set. This value is defaulted. + */ + if (f.isPersistent() && !f.isToSet()) + return true; + + return false; + } + + /* This is not a serialized field. There should be + * a default value only if the field really exists. + */ + try + { + return (clazz.forClass().getDeclaredField (name) != null); + } + catch (NoSuchFieldException e) + { + throw new IllegalArgumentException(e); + } + } + + public boolean get(String name, boolean defvalue) + throws IOException, IllegalArgumentException + { + ObjectStreamField field = getField(name, Boolean.TYPE); + + if (field == null) + return defvalue; + + return prim_field_data[field.getOffset()] == 0 ? false : true; + } + + public char get(String name, char defvalue) + throws IOException, IllegalArgumentException + { + ObjectStreamField field = getField(name, Character.TYPE); + + if (field == null) + return defvalue; + + int off = field.getOffset(); + + return (char)(((prim_field_data[off++] & 0xFF) << 8) + | (prim_field_data[off] & 0xFF)); + } + + public byte get(String name, byte defvalue) + throws IOException, IllegalArgumentException + { + ObjectStreamField field = getField(name, Byte.TYPE); + + if (field == null) + return defvalue; + + return prim_field_data[field.getOffset()]; + } + + public short get(String name, short defvalue) + throws IOException, IllegalArgumentException + { + ObjectStreamField field = getField(name, Short.TYPE); + + if (field == null) + return defvalue; + + int off = field.getOffset(); + + return (short)(((prim_field_data[off++] & 0xFF) << 8) + | (prim_field_data[off] & 0xFF)); + } + + public int get(String name, int defvalue) + throws IOException, IllegalArgumentException + { + ObjectStreamField field = getField(name, Integer.TYPE); + + if (field == null) + return defvalue; + + int off = field.getOffset(); + + return ((prim_field_data[off++] & 0xFF) << 24) + | ((prim_field_data[off++] & 0xFF) << 16) + | ((prim_field_data[off++] & 0xFF) << 8) + | (prim_field_data[off] & 0xFF); + } + + public long get(String name, long defvalue) + throws IOException, IllegalArgumentException + { + ObjectStreamField field = getField(name, Long.TYPE); + + if (field == null) + return defvalue; + + int off = field.getOffset(); + + return (long)(((prim_field_data[off++] & 0xFFL) << 56) + | ((prim_field_data[off++] & 0xFFL) << 48) + | ((prim_field_data[off++] & 0xFFL) << 40) + | ((prim_field_data[off++] & 0xFFL) << 32) + | ((prim_field_data[off++] & 0xFF) << 24) + | ((prim_field_data[off++] & 0xFF) << 16) + | ((prim_field_data[off++] & 0xFF) << 8) + | (prim_field_data[off] & 0xFF)); + } + + public float get(String name, float defvalue) + throws IOException, IllegalArgumentException + { + ObjectStreamField field = getField(name, Float.TYPE); + + if (field == null) + return defvalue; + + int off = field.getOffset(); + + return Float.intBitsToFloat(((prim_field_data[off++] & 0xFF) << 24) + | ((prim_field_data[off++] & 0xFF) << 16) + | ((prim_field_data[off++] & 0xFF) << 8) + | (prim_field_data[off] & 0xFF)); + } + + public double get(String name, double defvalue) + throws IOException, IllegalArgumentException + { + ObjectStreamField field = getField(name, Double.TYPE); + + if (field == null) + return defvalue; + + int off = field.getOffset(); + + return Double.longBitsToDouble + ( (long) (((prim_field_data[off++] & 0xFFL) << 56) + | ((prim_field_data[off++] & 0xFFL) << 48) + | ((prim_field_data[off++] & 0xFFL) << 40) + | ((prim_field_data[off++] & 0xFFL) << 32) + | ((prim_field_data[off++] & 0xFF) << 24) + | ((prim_field_data[off++] & 0xFF) << 16) + | ((prim_field_data[off++] & 0xFF) << 8) + | (prim_field_data[off] & 0xFF))); + } + + public Object get(String name, Object defvalue) + throws IOException, IllegalArgumentException + { + ObjectStreamField field = + getField(name, defvalue == null ? null : defvalue.getClass ()); + + if (field == null) + return defvalue; + + return objs[field.getOffset()]; + } + + private ObjectStreamField getField(String name, Class type) + throws IllegalArgumentException + { + ObjectStreamField field = clazz.getField(name); + boolean illegal = false; + + // XXX This code is horrible and needs to be rewritten! + try + { + try + { + Class field_type = field.getType(); + + if (type == field_type || + (type == null && !field_type.isPrimitive())) + { + /* See defaulted */ + return field; + } + + illegal = true; + throw new IllegalArgumentException + ("Field requested is of type " + + field_type.getName() + + ", but requested type was " + + (type == null ? "Object" : type.getName())); + } + catch (NullPointerException _) + { + /* Here we catch NullPointerException, because it may + only come from the call 'field.getType()'. If field + is null, we have to return null and classpath ethic + say we must try to avoid 'if (xxx == null)'. + */ + } + catch (IllegalArgumentException e) + { + throw e; + } + + return null; + } + finally + { + /* If this is an unassigned field we should return + * the default value. + */ + if (!illegal && field != null && !field.isToSet() && field.isPersistent()) + return null; + + /* We do not want to modify transient fields. They should + * be left to 0. + */ + try + { + Field f = clazz.forClass().getDeclaredField(name); + if (Modifier.isTransient(f.getModifiers())) + throw new IllegalArgumentException + ("no such field (non transient) " + name); + if (field == null && f.getType() != type) + throw new IllegalArgumentException + ("Invalid requested type for field " + name); + } + catch (NoSuchFieldException e) + { + if (field == null) + throw new IllegalArgumentException(e); + } + + } + } + }; + + fieldsAlreadyRead = true; + return prereadFields; + } + + /** + * Protected constructor that allows subclasses to override + * deserialization. This constructor should be called by subclasses + * that wish to override readObject (Object). This + * method does a security check NOTE: currently not + * implemented, then sets a flag that informs + * readObject (Object) to call the subclasses + * readObjectOverride (Object) method. + * + * @see #readObjectOverride() + */ + protected ObjectInputStream() + throws IOException, SecurityException + { + SecurityManager sec_man = System.getSecurityManager(); + if (sec_man != null) + sec_man.checkPermission(SUBCLASS_IMPLEMENTATION_PERMISSION); + this.useSubclassMethod = true; + } + + /** + * This method allows subclasses to override the default + * de serialization mechanism provided by + * ObjectInputStream. To make this method be used for + * writing objects, subclasses must invoke the 0-argument + * constructor on this class from their constructor. + * + * @see #ObjectInputStream() + */ + protected Object readObjectOverride() + throws ClassNotFoundException, IOException, OptionalDataException + { + throw new IOException("Subclass of ObjectInputStream must implement readObjectOverride"); + } + + /** + * Assigns the next available handle to obj. + * + * @param obj The object for which we want a new handle. + * @param shared True if the handle should be shared + * with later calls. + * @return A valid handle for the specified object. + */ + private int assignNewHandle(Object obj, boolean shared) + { + int handle = this.nextOID; + this.nextOID = handle + 1; + rememberHandle(obj,shared,handle); + return handle; + } + + /** + * Remember the object associated with the given handle. + * + * @param obj an object + * @param shared true if the reference should be shared + * with later calls. + * @param handle a handle, must be >= baseWireHandle + * + * @see #lookupHandle + */ + private void rememberHandle(Object obj, boolean shared, + int handle) + { + handles.put(handle, new Pair(shared, obj)); + } + + /** + * Look up the object associated with a given handle. + * + * @param handle a handle, must be >= baseWireHandle + * @return the object remembered for handle or null if none. + * @throws StreamCorruptedException if the handle is invalid. + * @throws InvalidObjectException if the reference is not shared. + * @see #rememberHandle + */ + private Object lookupHandle(int handle) + throws ObjectStreamException + { + Pair result = handles.get(handle); + if (result == null) + throw new StreamCorruptedException("The handle, " + + Integer.toHexString(handle) + + ", is invalid."); + if (!result.getLeft()) + throw new InvalidObjectException("The handle, " + + Integer.toHexString(handle) + + ", is not shared."); + return result.getRight(); + } + + private Object processResolution(ObjectStreamClass osc, Object obj, int handle, + boolean shared) + throws IOException + { + if (osc != null && obj instanceof Serializable) + { + try + { + Method m = osc.readResolveMethod; + if(m != null) + { + obj = m.invoke(obj, new Object[] {}); + } + } + catch (IllegalAccessException ignore) + { + } + catch (InvocationTargetException exception) + { + Throwable cause = exception.getCause(); + if (cause instanceof ObjectStreamException) + throw (ObjectStreamException) cause; + else if (cause instanceof RuntimeException) + throw (RuntimeException) cause; + else if (cause instanceof Error) + throw (Error) cause; + } + } + + if (this.resolveEnabled) + obj = resolveObject(obj); + + rememberHandle(obj, shared, handle); + if (!shared) + { + if (obj instanceof byte[]) + return ((byte[]) obj).clone(); + if (obj instanceof short[]) + return ((short[]) obj).clone(); + if (obj instanceof int[]) + return ((int[]) obj).clone(); + if (obj instanceof long[]) + return ((long[]) obj).clone(); + if (obj instanceof char[]) + return ((char[]) obj).clone(); + if (obj instanceof boolean[]) + return ((boolean[]) obj).clone(); + if (obj instanceof float[]) + return ((float[]) obj).clone(); + if (obj instanceof double[]) + return ((double[]) obj).clone(); + if (obj instanceof Object[]) + return ((Object[]) obj).clone(); + } + return obj; + } + + private void clearHandles() + { + handles.clear(); + this.nextOID = baseWireHandle; + } + + private void readNextBlock() throws IOException + { + byte marker = this.realInputStream.readByte(); + while (marker == TC_RESET) + { + if(dump) dumpElementln("RESET"); + clearHandles(); + marker = this.realInputStream.readByte(); + } + readNextBlock(marker); + } + + private void readNextBlock(byte marker) throws IOException + { + if (marker == TC_BLOCKDATA) + { + if(dump) dumpElement("BLOCK DATA SIZE="); + this.blockDataBytes = this.realInputStream.readUnsignedByte(); + if(dump) dumpElementln (Integer.toString(this.blockDataBytes)); + } + else if (marker == TC_BLOCKDATALONG) + { + if(dump) dumpElement("BLOCK DATA LONG SIZE="); + this.blockDataBytes = this.realInputStream.readInt(); + if(dump) dumpElementln (Integer.toString(this.blockDataBytes)); + } + else + { + throw new EOFException("Attempt to read primitive data, but no data block is active."); + } + + if (this.blockData.length < this.blockDataBytes) + this.blockData = new byte[this.blockDataBytes]; + + this.realInputStream.readFully (this.blockData, 0, this.blockDataBytes); + this.blockDataPosition = 0; + } + + private void readArrayElements (Object array, Class clazz) + throws ClassNotFoundException, IOException + { + if (clazz.isPrimitive()) + { + if (clazz == Boolean.TYPE) + { + boolean[] cast_array = (boolean[])array; + for (int i=0; i < cast_array.length; i++) + cast_array[i] = this.realInputStream.readBoolean(); + return; + } + if (clazz == Byte.TYPE) + { + byte[] cast_array = (byte[])array; + for (int i=0; i < cast_array.length; i++) + cast_array[i] = this.realInputStream.readByte(); + return; + } + if (clazz == Character.TYPE) + { + char[] cast_array = (char[])array; + for (int i=0; i < cast_array.length; i++) + cast_array[i] = this.realInputStream.readChar(); + return; + } + if (clazz == Double.TYPE) + { + double[] cast_array = (double[])array; + for (int i=0; i < cast_array.length; i++) + cast_array[i] = this.realInputStream.readDouble(); + return; + } + if (clazz == Float.TYPE) + { + float[] cast_array = (float[])array; + for (int i=0; i < cast_array.length; i++) + cast_array[i] = this.realInputStream.readFloat(); + return; + } + if (clazz == Integer.TYPE) + { + int[] cast_array = (int[])array; + for (int i=0; i < cast_array.length; i++) + cast_array[i] = this.realInputStream.readInt(); + return; + } + if (clazz == Long.TYPE) + { + long[] cast_array = (long[])array; + for (int i=0; i < cast_array.length; i++) + cast_array[i] = this.realInputStream.readLong(); + return; + } + if (clazz == Short.TYPE) + { + short[] cast_array = (short[])array; + for (int i=0; i < cast_array.length; i++) + cast_array[i] = this.realInputStream.readShort(); + return; + } + } + else + { + Object[] cast_array = (Object[])array; + for (int i=0; i < cast_array.length; i++) + cast_array[i] = readObject(); + } + } + + private void readFields (Object obj, ObjectStreamClass stream_osc) + throws ClassNotFoundException, IOException + { + ObjectStreamField[] fields = stream_osc.fieldMapping; + + for (int i = 0; i < fields.length; i += 2) + { + ObjectStreamField stream_field = fields[i]; + ObjectStreamField real_field = fields[i + 1]; + boolean read_value = (stream_field != null && stream_field.getOffset() >= 0 && stream_field.isToSet()); + boolean set_value = (real_field != null && real_field.isToSet()); + String field_name; + char type; + + if (stream_field != null) + { + field_name = stream_field.getName(); + type = stream_field.getTypeCode(); + } + else + { + field_name = real_field.getName(); + type = real_field.getTypeCode(); + } + + switch(type) + { + case 'Z': + { + boolean value = + read_value ? this.realInputStream.readBoolean() : false; + if (dump && read_value && set_value) + dumpElementln(" " + field_name + ": " + value); + if (set_value) + real_field.setBooleanField(obj, value); + break; + } + case 'B': + { + byte value = + read_value ? this.realInputStream.readByte() : 0; + if (dump && read_value && set_value) + dumpElementln(" " + field_name + ": " + value); + if (set_value) + real_field.setByteField(obj, value); + break; + } + case 'C': + { + char value = + read_value ? this.realInputStream.readChar(): 0; + if (dump && read_value && set_value) + dumpElementln(" " + field_name + ": " + value); + if (set_value) + real_field.setCharField(obj, value); + break; + } + case 'D': + { + double value = + read_value ? this.realInputStream.readDouble() : 0; + if (dump && read_value && set_value) + dumpElementln(" " + field_name + ": " + value); + if (set_value) + real_field.setDoubleField(obj, value); + break; + } + case 'F': + { + float value = + read_value ? this.realInputStream.readFloat() : 0; + if (dump && read_value && set_value) + dumpElementln(" " + field_name + ": " + value); + if (set_value) + real_field.setFloatField(obj, value); + break; + } + case 'I': + { + int value = + read_value ? this.realInputStream.readInt() : 0; + if (dump && read_value && set_value) + dumpElementln(" " + field_name + ": " + value); + if (set_value) + real_field.setIntField(obj, value); + break; + } + case 'J': + { + long value = + read_value ? this.realInputStream.readLong() : 0; + if (dump && read_value && set_value) + dumpElementln(" " + field_name + ": " + value); + if (set_value) + real_field.setLongField(obj, value); + break; + } + case 'S': + { + short value = + read_value ? this.realInputStream.readShort() : 0; + if (dump && read_value && set_value) + dumpElementln(" " + field_name + ": " + value); + if (set_value) + real_field.setShortField(obj, value); + break; + } + case 'L': + case '[': + { + Object value = + read_value ? readObject() : null; + if (set_value) + real_field.setObjectField(obj, value); + break; + } + default: + throw new InternalError("Invalid type code: " + type); + } + } + } + + // Toggles writing primitive data to block-data buffer. + private boolean setBlockDataMode (boolean on) + { + boolean oldmode = this.readDataFromBlock; + this.readDataFromBlock = on; + + if (on) + this.dataInputStream = this.blockDataInput; + else + this.dataInputStream = this.realInputStream; + return oldmode; + } + + // returns a new instance of REAL_CLASS that has been constructed + // only to the level of CONSTRUCTOR_CLASS (a super class of REAL_CLASS) + private Object newObject (Class real_class, Constructor constructor) + throws ClassNotFoundException, IOException + { + if (constructor == null) + throw new InvalidClassException("Missing accessible no-arg base class constructor for " + real_class.getName()); + try + { + return VMObjectInputStream.allocateObject(real_class, constructor.getDeclaringClass(), constructor); + } + catch (InstantiationException e) + { + throw (ClassNotFoundException) new ClassNotFoundException + ("Instance of " + real_class + " could not be created").initCause(e); + } + } + + // runs all registered ObjectInputValidations in prioritized order + // on OBJ + private void invokeValidators() throws InvalidObjectException + { + try + { + Iterator it = currentObjectValidators.iterator(); + while(it.hasNext()) + { + ValidatorAndPriority vap = it.next(); + ObjectInputValidation validator = vap.validator; + validator.validateObject(); + } + } + finally + { + currentObjectValidators = null; + } + } + + private void callReadMethod (Method readObject, Class klass, Object obj) + throws ClassNotFoundException, IOException + { + try + { + readObject.invoke(obj, new Object[] { this }); + } + catch (InvocationTargetException x) + { + /* Rethrow if possible. */ + Throwable exception = x.getTargetException(); + if (exception instanceof RuntimeException) + throw (RuntimeException) exception; + if (exception instanceof IOException) + throw (IOException) exception; + if (exception instanceof ClassNotFoundException) + throw (ClassNotFoundException) exception; + + throw (IOException) new IOException( + "Exception thrown from readObject() on " + klass).initCause(x); + } + catch (Exception x) + { + throw (IOException) new IOException( + "Failure invoking readObject() on " + klass).initCause(x); + } + + // Invalidate fields which has been read through readFields. + prereadFields = null; + } + + private static final int BUFFER_SIZE = 1024; + + private DataInputStream realInputStream; + private DataInputStream dataInputStream; + private DataInputStream blockDataInput; + private int blockDataPosition; + private int blockDataBytes; + private byte[] blockData; + private boolean useSubclassMethod; + private int nextOID; + private boolean resolveEnabled; + private Map> handles; + private Object currentObject; + private ObjectStreamClass currentObjectStreamClass; + private TreeSet currentObjectValidators; + private boolean readDataFromBlock; + private boolean fieldsAlreadyRead; + private Hashtable classLookupTable; + private GetField prereadFields; + + private static boolean dump; + + // The nesting depth for debugging output + private int depth = 0; + + private static final boolean DEBUG = false; + + private void dumpElement (String msg) + { + System.out.print(msg); + } + + private void dumpElementln (String msg) + { + System.out.println(msg); + for (int i = 0; i < depth; i++) + System.out.print (" "); + System.out.print (Thread.currentThread() + ": "); + } + + private void dumpElementln (String msg, Object obj) + { + try + { + System.out.print(msg); + if (java.lang.reflect.Proxy.isProxyClass(obj.getClass())) + System.out.println(obj.getClass()); + else + System.out.println(obj); + } + catch (Exception _) + { + } + for (int i = 0; i < depth; i++) + System.out.print (" "); + System.out.print (Thread.currentThread() + ": "); + } + + // used to keep a prioritized list of object validators + private static final class ValidatorAndPriority implements Comparable + { + int priority; + ObjectInputValidation validator; + + ValidatorAndPriority (ObjectInputValidation validator, int priority) + { + this.priority = priority; + this.validator = validator; + } + + public int compareTo (Object o) + { + ValidatorAndPriority vap = (ValidatorAndPriority)o; + return this.priority - vap.priority; + } + } +} diff --git a/libjava/classpath/java/io/ObjectInputValidation.java b/libjava/classpath/java/io/ObjectInputValidation.java new file mode 100644 index 000000000..fb6de1905 --- /dev/null +++ b/libjava/classpath/java/io/ObjectInputValidation.java @@ -0,0 +1,67 @@ +/* ObjectInputValidation.java -- Validate an object + Copyright (C) 1998, 2003 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This class allows an object to validate that it is valid after + * deserialization has run completely for it and all dependent objects. + * This allows an object to determine if it is invalid even if all + * state data was correctly deserialized from the stream. It can also + * be used to perform re-initialization type activities on an object + * after it has been completely deserialized. + * + * Since this method functions as a type of callback, it must be + * registered through ObjectInputStream.registerValidation + * in order to be invoked. This is typically done in the + * readObject method. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * + * @see ObjectInputStream#registerValidation + */ +public interface ObjectInputValidation +{ + /** + * This method is called to validate an object after serialization + * is complete. If the object is invalid an exception is thrown. + * + * @exception InvalidObjectException If the object is invalid + */ + void validateObject() throws InvalidObjectException; +} diff --git a/libjava/classpath/java/io/ObjectOutput.java b/libjava/classpath/java/io/ObjectOutput.java new file mode 100644 index 000000000..628f8b97b --- /dev/null +++ b/libjava/classpath/java/io/ObjectOutput.java @@ -0,0 +1,110 @@ +/* ObjectOutput.java -- Interface for writing objects to a stream + Copyright (C) 1998, 2003 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This interface extends DataOutput to provide the additional + * facility of writing object instances to a stream. It also adds some + * additional methods to make the interface more + * OutputStream like. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * + * @see DataOutput + */ +public interface ObjectOutput extends DataOutput +{ + /** + * This method writes the specified byte to the output stream. + * + * @param b The byte to write. + * + * @exception IOException If an error occurs. + */ + void write(int b) throws IOException; + + /** + * This method writes all the bytes in the specified byte array to the + * output stream. + * + * @param buf The array of bytes to write. + * + * @exception IOException If an error occurs. + */ + void write(byte[] buf) throws IOException; + + /** + * This method writes len bytes from the specified array + * starting at index offset into that array. + * + * @param buf The byte array to write from. + * @param offset The index into the byte array to start writing from. + * @param len The number of bytes to write. + * + * @exception IOException If an error occurs. + */ + void write(byte[] buf, int offset, int len) + throws IOException; + + /** + * This method writes a object instance to a stream. The format of the + * data written is determined by the actual implementation of this method + * + * @param obj The object to write + * + * @exception IOException If an error occurs + */ + void writeObject(Object obj) throws IOException; + + /** + * This method causes any buffered data to be flushed out to the underlying + * stream + * + * @exception IOException If an error occurs + */ + void flush() throws IOException; + + /** + * This method closes the underlying stream. + * + * @exception IOException If an error occurs + */ + void close() throws IOException; + +} // interface ObjectOutput diff --git a/libjava/classpath/java/io/ObjectOutputStream.java b/libjava/classpath/java/io/ObjectOutputStream.java new file mode 100644 index 000000000..71d2e0b34 --- /dev/null +++ b/libjava/classpath/java/io/ObjectOutputStream.java @@ -0,0 +1,1490 @@ +/* ObjectOutputStream.java -- Class used to write serialized objects + Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2008 + Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +import gnu.java.io.ObjectIdentityMap2Int; +import gnu.java.lang.reflect.TypeSignature; +import gnu.java.security.action.SetAccessibleAction; + +import java.lang.reflect.Array; +import java.lang.reflect.Field; +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; + + +/** + * An ObjectOutputStream can be used to write objects + * as well as primitive data in a platform-independent manner to an + * OutputStream. + * + * The data produced by an ObjectOutputStream can be read + * and reconstituted by an ObjectInputStream. + * + * writeObject (Object) is used to write Objects, the + * write<type> methods are used to write primitive + * data (as in DataOutputStream). Strings can be written + * as objects or as primitive data. + * + * Not all objects can be written out using an + * ObjectOutputStream. Only those objects that are an + * instance of java.io.Serializable can be written. + * + * Using default serialization, information about the class of an + * object is written, all of the non-transient, non-static fields of + * the object are written, if any of these fields are objects, they are + * written out in the same manner. + * + * An object is only written out the first time it is encountered. If + * the object is encountered later, a reference to it is written to + * the underlying stream. Thus writing circular object graphs + * does not present a problem, nor are relationships between objects + * in a graph lost. + * + * Example usage: + * 
+ * Hashtable map = new Hashtable ();
+ * map.put ("one", new Integer (1));
+ * map.put ("two", new Integer (2));
+ *
+ * ObjectOutputStream oos =
+ * new ObjectOutputStream (new FileOutputStream ("numbers"));
+ * oos.writeObject (map);
+ * oos.close ();
+ *
+ * ObjectInputStream ois =
+ * new ObjectInputStream (new FileInputStream ("numbers"));
+ * Hashtable newmap = (Hashtable)ois.readObject ();
+ *
+ * System.out.println (newmap);
+ *
+ * + * The default serialization can be overriden in two ways. + * + * By defining a method private void + * writeObject (ObjectOutputStream), a class can dictate exactly + * how information about itself is written. + * defaultWriteObject () may be called from this method to + * carry out default serialization. This method is not + * responsible for dealing with fields of super-classes or subclasses. + * + * By implementing java.io.Externalizable. This gives + * the class complete control over the way it is written to the + * stream. If this approach is used the burden of writing superclass + * and subclass data is transfered to the class implementing + * java.io.Externalizable. + * + * @see java.io.DataOutputStream + * @see java.io.Externalizable + * @see java.io.ObjectInputStream + * @see java.io.Serializable + * @author Tom Tromey (tromey@redhat.com) + * @author Jeroen Frijters (jeroen@frijters.net) + * @author Guilhem Lavaux (guilhem@kaffe.org) + * @author Michael Koch (konqueror@gmx.de) + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + */ +public class ObjectOutputStream extends OutputStream + implements ObjectOutput, ObjectStreamConstants +{ + /** + * Creates a new ObjectOutputStream that will do all of + * its writing onto out. This method also initializes + * the stream by writing the header information (stream magic number + * and stream version). + * + * @exception IOException Writing stream header to underlying + * stream cannot be completed. + * + * @see #writeStreamHeader() + */ + public ObjectOutputStream (OutputStream out) throws IOException + { + realOutput = new DataOutputStream(out); + blockData = new byte[ BUFFER_SIZE ]; + blockDataCount = 0; + blockDataOutput = new DataOutputStream(this); + setBlockDataMode(true); + replacementEnabled = false; + isSerializing = false; + nextOID = baseWireHandle; + OIDLookupTable = new ObjectIdentityMap2Int(); + protocolVersion = defaultProtocolVersion; + useSubclassMethod = false; + writeStreamHeader(); + + if (DEBUG) + { + String val = System.getProperty("gcj.dumpobjects"); + if (val != null && !val.equals("")) + dump = true; + } + } + + /** + * Writes a representation of obj to the underlying + * output stream by writing out information about its class, then + * writing out each of the objects non-transient, non-static + * fields. If any of these fields are other objects, + * they are written out in the same manner. + * + * This method can be overriden by a class by implementing + * private void writeObject (ObjectOutputStream). + * + * If an exception is thrown from this method, the stream is left in + * an undefined state. + * + * @param obj the object to serialize. + * @exception NotSerializableException An attempt was made to + * serialize an Object that is not serializable. + * + * @exception InvalidClassException Somebody tried to serialize + * an object which is wrongly formatted. + * + * @exception IOException Exception from underlying + * OutputStream. + * @see #writeUnshared(Object) + */ + public final void writeObject(Object obj) throws IOException + { + writeObject(obj, true); + } + + /** + * Writes an object to the stream in the same manner as + * {@link #writeObject(Object)}, but without the use of + * references. As a result, the object is always written + * to the stream in full. Likewise, if an object is written + * by this method and is then later written again by + * {@link #writeObject(Object)}, both calls will write out + * the object in full, as the later call to + * {@link #writeObject(Object)} will know nothing of the + * earlier use of {@link #writeUnshared(Object)}. + * + * @param obj the object to serialize. + * @throws NotSerializableException if the object being + * serialized does not implement + * {@link Serializable}. + * @throws InvalidClassException if a problem occurs with + * the class of the object being + * serialized. + * @throws IOException if an I/O error occurs on the underlying + * OutputStream. + * @since 1.4 + * @see #writeObject(Object) + */ + public void writeUnshared(Object obj) + throws IOException + { + writeObject(obj, false); + } + + /** + * Writes a representation of obj to the underlying + * output stream by writing out information about its class, then + * writing out each of the objects non-transient, non-static + * fields. If any of these fields are other objects, + * they are written out in the same manner. + * + * This method can be overriden by a class by implementing + * private void writeObject (ObjectOutputStream). + * + * If an exception is thrown from this method, the stream is left in + * an undefined state. + * + * @param obj the object to serialize. + * @param shared true if the serialized object should be + * shared with later calls. + * @exception NotSerializableException An attempt was made to + * serialize an Object that is not serializable. + * + * @exception InvalidClassException Somebody tried to serialize + * an object which is wrongly formatted. + * + * @exception IOException Exception from underlying + * OutputStream. + * @see #writeUnshared(Object) + */ + private final void writeObject(Object obj, boolean shared) + throws IOException + { + if (useSubclassMethod) + { + if (dump) + dumpElementln ("WRITE OVERRIDE: " + obj); + + writeObjectOverride(obj); + return; + } + + if (dump) + dumpElementln ("WRITE: ", obj); + + depth += 2; + + boolean was_serializing = isSerializing; + boolean old_mode = setBlockDataMode(false); + try + { + isSerializing = true; + boolean replaceDone = false; + Object replacedObject = null; + + while (true) + { + if (obj == null) + { + realOutput.writeByte(TC_NULL); + break; + } + + int handle = findHandle(obj); + if (handle >= 0 && shared) + { + realOutput.writeByte(TC_REFERENCE); + realOutput.writeInt(handle); + break; + } + + if (obj instanceof Class) + { + Class cl = (Class)obj; + ObjectStreamClass osc = ObjectStreamClass.lookupForClassObject(cl); + realOutput.writeByte(TC_CLASS); + if (!osc.isProxyClass) + { + writeObject (osc); + } + else + {System.err.println("1"); + realOutput.writeByte(TC_PROXYCLASSDESC); + Class[] intfs = cl.getInterfaces(); + realOutput.writeInt(intfs.length); + for (int i = 0; i < intfs.length; i++) + realOutput.writeUTF(intfs[i].getName()); + + boolean oldmode = setBlockDataMode(true); + annotateProxyClass(cl); + setBlockDataMode(oldmode); + realOutput.writeByte(TC_ENDBLOCKDATA); + + writeObject(osc.getSuper()); + } + if (shared) + assignNewHandle(obj); + break; + } + + if (obj instanceof ObjectStreamClass) + { + writeClassDescriptor((ObjectStreamClass) obj); + break; + } + + Class clazz = obj.getClass(); + ObjectStreamClass osc = ObjectStreamClass.lookupForClassObject(clazz); + if (osc == null) + throw new NotSerializableException(clazz.getName()); + + if (osc.isEnum()) + { + /* TC_ENUM classDesc newHandle enumConstantName */ + realOutput.writeByte(TC_ENUM); + writeObject(osc); + if (shared) + assignNewHandle(obj); + writeObject(((Enum) obj).name()); + break; + } + + if ((replacementEnabled || obj instanceof Serializable) + && ! replaceDone) + { + replacedObject = obj; + + if (obj instanceof Serializable) + { + try + { + Method m = osc.writeReplaceMethod; + if (m != null) + obj = m.invoke(obj, new Object[0]); + } + catch (IllegalAccessException ignore) + { + } + catch (InvocationTargetException ignore) + { + } + } + + if (replacementEnabled) + obj = replaceObject(obj); + + replaceDone = true; + continue; + } + + if (obj instanceof String) + { + String s = (String)obj; + long l = realOutput.getUTFlength(s, 0, 0); + if (l <= 65535) + { + realOutput.writeByte(TC_STRING); + if (shared) + assignNewHandle(obj); + realOutput.writeUTFShort(s, (int)l); + } + else + { + realOutput.writeByte(TC_LONGSTRING); + if (shared) + assignNewHandle(obj); + realOutput.writeUTFLong(s, l); + } + break; + } + + if (clazz.isArray ()) + { + realOutput.writeByte(TC_ARRAY); + writeObject(osc); + if (shared) + assignNewHandle(obj); + writeArraySizeAndElements(obj, clazz.getComponentType()); + break; + } + + realOutput.writeByte(TC_OBJECT); + writeObject(osc); + + if (shared) + if (replaceDone) + assignNewHandle(replacedObject); + else + assignNewHandle(obj); + + if (obj instanceof Externalizable) + { + if (protocolVersion == PROTOCOL_VERSION_2) + setBlockDataMode(true); + + ((Externalizable)obj).writeExternal(this); + + if (protocolVersion == PROTOCOL_VERSION_2) + { + setBlockDataMode(false); + realOutput.writeByte(TC_ENDBLOCKDATA); + } + + break; + } + + if (obj instanceof Serializable) + { + Object prevObject = this.currentObject; + ObjectStreamClass prevObjectStreamClass = this.currentObjectStreamClass; + currentObject = obj; + ObjectStreamClass[] hierarchy = osc.hierarchy(); + + for (int i = 0; i < hierarchy.length; i++) + { + currentObjectStreamClass = hierarchy[i]; + + fieldsAlreadyWritten = false; + if (currentObjectStreamClass.hasWriteMethod()) + { + if (dump) + dumpElementln ("WRITE METHOD CALLED FOR: ", obj); + setBlockDataMode(true); + callWriteMethod(obj, currentObjectStreamClass); + setBlockDataMode(false); + realOutput.writeByte(TC_ENDBLOCKDATA); + if (dump) + dumpElementln ("WRITE ENDBLOCKDATA FOR: ", obj); + } + else + { + if (dump) + dumpElementln ("WRITE FIELDS CALLED FOR: ", obj); + writeFields(obj, currentObjectStreamClass); + } + } + + this.currentObject = prevObject; + this.currentObjectStreamClass = prevObjectStreamClass; + currentPutField = null; + break; + } + + throw new NotSerializableException(clazz.getName() + + " in " + + obj.getClass()); + } // end pseudo-loop + } + catch (ObjectStreamException ose) + { + // Rethrow these are fatal. + throw ose; + } + catch (IOException e) + { + realOutput.writeByte(TC_EXCEPTION); + reset(true); + + setBlockDataMode(false); + try + { + if (DEBUG) + { + e.printStackTrace(System.out); + } + writeObject(e); + } + catch (IOException ioe) + { + StreamCorruptedException ex = + new StreamCorruptedException + (ioe + " thrown while exception was being written to stream."); + if (DEBUG) + { + ex.printStackTrace(System.out); + } + throw ex; + } + + reset (true); + + } + finally + { + isSerializing = was_serializing; + setBlockDataMode(old_mode); + depth -= 2; + + if (dump) + dumpElementln ("END: ", obj); + } + } + + protected void writeClassDescriptor(ObjectStreamClass osc) throws IOException + { + if (osc.isProxyClass) + { + realOutput.writeByte(TC_PROXYCLASSDESC); + Class[] intfs = osc.forClass().getInterfaces(); + realOutput.writeInt(intfs.length); + for (int i = 0; i < intfs.length; i++) + realOutput.writeUTF(intfs[i].getName()); + + assignNewHandle(osc); + + boolean oldmode = setBlockDataMode(true); + annotateProxyClass(osc.forClass()); + setBlockDataMode(oldmode); + realOutput.writeByte(TC_ENDBLOCKDATA); + } + else + { + realOutput.writeByte(TC_CLASSDESC); + realOutput.writeUTF(osc.getName()); + if (osc.isEnum()) + realOutput.writeLong(0L); + else + realOutput.writeLong(osc.getSerialVersionUID()); + assignNewHandle(osc); + + int flags = osc.getFlags(); + + if (protocolVersion == PROTOCOL_VERSION_2 + && osc.isExternalizable()) + flags |= SC_BLOCK_DATA; + + realOutput.writeByte(flags); + + ObjectStreamField[] fields = osc.fields; + + if (fields == ObjectStreamClass.INVALID_FIELDS) + throw new InvalidClassException + (osc.getName(), "serialPersistentFields is invalid"); + + realOutput.writeShort(fields.length); + + ObjectStreamField field; + for (int i = 0; i < fields.length; i++) + { + field = fields[i]; + realOutput.writeByte(field.getTypeCode ()); + realOutput.writeUTF(field.getName ()); + + if (! field.isPrimitive()) + writeObject(field.getTypeString()); + } + + boolean oldmode = setBlockDataMode(true); + annotateClass(osc.forClass()); + setBlockDataMode(oldmode); + realOutput.writeByte(TC_ENDBLOCKDATA); + } + + if (osc.isSerializable() || osc.isExternalizable()) + writeObject(osc.getSuper()); + else + writeObject(null); + } + + /** + * Writes the current objects non-transient, non-static fields from + * the current class to the underlying output stream. + * + * This method is intended to be called from within a object's + * private void writeObject (ObjectOutputStream) + * method. + * + * @exception NotActiveException This method was called from a + * context other than from the current object's and current class's + * private void writeObject (ObjectOutputStream) + * method. + * + * @exception IOException Exception from underlying + * OutputStream. + */ + public void defaultWriteObject() + throws IOException, NotActiveException + { + markFieldsWritten(); + writeFields(currentObject, currentObjectStreamClass); + } + + + private void markFieldsWritten() throws IOException + { + if (currentObject == null || currentObjectStreamClass == null) + throw new NotActiveException + ("defaultWriteObject called by non-active class and/or object"); + + if (fieldsAlreadyWritten) + throw new IOException + ("Only one of writeFields and defaultWriteObject may be called, and it may only be called once"); + + fieldsAlreadyWritten = true; + } + + /** + * Resets stream to state equivalent to the state just after it was + * constructed. + * + * Causes all objects previously written to the stream to be + * forgotten. A notification of this reset is also written to the + * underlying stream. + * + * @exception IOException Exception from underlying + * OutputStream or reset called while serialization is + * in progress. + */ + public void reset() throws IOException + { + reset(false); + } + + + private void reset(boolean internal) throws IOException + { + if (!internal) + { + if (isSerializing) + throw new IOException("Reset called while serialization in progress"); + + realOutput.writeByte(TC_RESET); + } + + clearHandles(); + } + + + /** + * Informs this ObjectOutputStream to write data + * according to the specified protocol. There are currently two + * different protocols, specified by PROTOCOL_VERSION_1 + * and PROTOCOL_VERSION_2. This implementation writes + * data using PROTOCOL_VERSION_2 by default, as is done + * since the JDK 1.2. + *

+ * For an explanation of the differences between the two protocols + * see the Java Object Serialization Specification. + *

+ * + * @param version the version to use. + * + * @throws IllegalArgumentException if version is not a valid + * protocol. + * @throws IllegalStateException if called after the first the first object + * was serialized. + * @throws IOException if an I/O error occurs. + * + * @see ObjectStreamConstants#PROTOCOL_VERSION_1 + * @see ObjectStreamConstants#PROTOCOL_VERSION_2 + * + * @since 1.2 + */ + public void useProtocolVersion(int version) throws IOException + { + if (version != PROTOCOL_VERSION_1 && version != PROTOCOL_VERSION_2) + throw new IllegalArgumentException("Invalid protocol version requested."); + + if (nextOID != baseWireHandle) + throw new IllegalStateException("Protocol version cannot be changed " + + "after serialization started."); + + protocolVersion = version; + } + + /** + * An empty hook that allows subclasses to write extra information + * about classes to the stream. This method is called the first + * time each class is seen, and after all of the standard + * information about the class has been written. + * + * @exception IOException Exception from underlying + * OutputStream. + * + * @see ObjectInputStream#resolveClass(java.io.ObjectStreamClass) + */ + protected void annotateClass(Class cl) throws IOException + { + } + + protected void annotateProxyClass(Class cl) throws IOException + { + } + + /** + * Allows subclasses to replace objects that are written to the + * stream with other objects to be written in their place. This + * method is called the first time each object is encountered + * (modulo reseting of the stream). + * + * This method must be enabled before it will be called in the + * serialization process. + * + * @exception IOException Exception from underlying + * OutputStream. + * + * @see #enableReplaceObject(boolean) + */ + protected Object replaceObject(Object obj) throws IOException + { + return obj; + } + + + /** + * If enable is true and this object is + * trusted, then replaceObject (Object) will be called + * in subsequent calls to writeObject (Object). + * Otherwise, replaceObject (Object) will not be called. + * + * @exception SecurityException This class is not trusted. + */ + protected boolean enableReplaceObject(boolean enable) + throws SecurityException + { + if (enable) + { + SecurityManager sm = System.getSecurityManager(); + if (sm != null) + sm.checkPermission(new SerializablePermission("enableSubstitution")); + } + + boolean old_val = replacementEnabled; + replacementEnabled = enable; + return old_val; + } + + + /** + * Writes stream magic and stream version information to the + * underlying stream. + * + * @exception IOException Exception from underlying + * OutputStream. + */ + protected void writeStreamHeader() throws IOException + { + realOutput.writeShort(STREAM_MAGIC); + realOutput.writeShort(STREAM_VERSION); + } + + /** + * Protected constructor that allows subclasses to override + * serialization. This constructor should be called by subclasses + * that wish to override writeObject (Object). This + * method does a security check NOTE: currently not + * implemented, then sets a flag that informs + * writeObject (Object) to call the subclasses + * writeObjectOverride (Object) method. + * + * @see #writeObjectOverride(Object) + */ + protected ObjectOutputStream() throws IOException, SecurityException + { + SecurityManager sec_man = System.getSecurityManager (); + if (sec_man != null) + sec_man.checkPermission(SUBCLASS_IMPLEMENTATION_PERMISSION); + useSubclassMethod = true; + } + + + /** + * This method allows subclasses to override the default + * serialization mechanism provided by + * ObjectOutputStream. To make this method be used for + * writing objects, subclasses must invoke the 0-argument + * constructor on this class from there constructor. + * + * @see #ObjectOutputStream() + * + * @exception NotActiveException Subclass has arranged for this + * method to be called, but did not implement this method. + */ + protected void writeObjectOverride(Object obj) throws NotActiveException, + IOException + { + throw new NotActiveException + ("Subclass of ObjectOutputStream must implement writeObjectOverride"); + } + + + /** + * @see DataOutputStream#write(int) + */ + public void write (int data) throws IOException + { + if (writeDataAsBlocks) + { + if (blockDataCount == BUFFER_SIZE) + drain(); + + blockData[ blockDataCount++ ] = (byte)data; + } + else + realOutput.write(data); + } + + + /** + * @see DataOutputStream#write(byte[]) + */ + public void write(byte[] b) throws IOException + { + write(b, 0, b.length); + } + + + /** + * @see DataOutputStream#write(byte[],int,int) + */ + public void write(byte[] b, int off, int len) throws IOException + { + if (writeDataAsBlocks) + { + if (len < 0) + throw new IndexOutOfBoundsException(); + + if (blockDataCount + len < BUFFER_SIZE) + { + System.arraycopy(b, off, blockData, blockDataCount, len); + blockDataCount += len; + } + else + { + drain(); + writeBlockDataHeader(len); + realOutput.write(b, off, len); + } + } + else + realOutput.write(b, off, len); + } + + + /** + * @see DataOutputStream#flush() + */ + public void flush () throws IOException + { + drain(); + realOutput.flush(); + } + + + /** + * Causes the block-data buffer to be written to the underlying + * stream, but does not flush underlying stream. + * + * @exception IOException Exception from underlying + * OutputStream. + */ + protected void drain() throws IOException + { + if (blockDataCount == 0) + return; + + if (writeDataAsBlocks) + writeBlockDataHeader(blockDataCount); + realOutput.write(blockData, 0, blockDataCount); + blockDataCount = 0; + } + + + /** + * @see java.io.DataOutputStream#close () + */ + public void close() throws IOException + { + flush(); + realOutput.close(); + } + + + /** + * @see java.io.DataOutputStream#writeBoolean (boolean) + */ + public void writeBoolean(boolean data) throws IOException + { + blockDataOutput.writeBoolean(data); + } + + + /** + * @see java.io.DataOutputStream#writeByte (int) + */ + public void writeByte(int data) throws IOException + { + blockDataOutput.writeByte(data); + } + + + /** + * @see java.io.DataOutputStream#writeShort (int) + */ + public void writeShort (int data) throws IOException + { + blockDataOutput.writeShort(data); + } + + + /** + * @see java.io.DataOutputStream#writeChar (int) + */ + public void writeChar(int data) throws IOException + { + blockDataOutput.writeChar(data); + } + + + /** + * @see java.io.DataOutputStream#writeInt (int) + */ + public void writeInt(int data) throws IOException + { + blockDataOutput.writeInt(data); + } + + + /** + * @see java.io.DataOutputStream#writeLong (long) + */ + public void writeLong(long data) throws IOException + { + blockDataOutput.writeLong(data); + } + + + /** + * @see java.io.DataOutputStream#writeFloat (float) + */ + public void writeFloat(float data) throws IOException + { + blockDataOutput.writeFloat(data); + } + + + /** + * @see java.io.DataOutputStream#writeDouble (double) + */ + public void writeDouble(double data) throws IOException + { + blockDataOutput.writeDouble(data); + } + + + /** + * @see java.io.DataOutputStream#writeBytes (java.lang.String) + */ + public void writeBytes(String data) throws IOException + { + blockDataOutput.writeBytes(data); + } + + + /** + * @see java.io.DataOutputStream#writeChars (java.lang.String) + */ + public void writeChars(String data) throws IOException + { + dataOutput.writeChars(data); + } + + + /** + * @see java.io.DataOutputStream#writeUTF (java.lang.String) + */ + public void writeUTF(String data) throws IOException + { + dataOutput.writeUTF(data); + } + + + /** + * This class allows a class to specify exactly which fields should + * be written, and what values should be written for these fields. + * + * XXX: finish up comments + */ + public abstract static class PutField + { + public abstract void put (String name, boolean value); + public abstract void put (String name, byte value); + public abstract void put (String name, char value); + public abstract void put (String name, double value); + public abstract void put (String name, float value); + public abstract void put (String name, int value); + public abstract void put (String name, long value); + public abstract void put (String name, short value); + public abstract void put (String name, Object value); + + /** + * @deprecated + */ + public abstract void write (ObjectOutput out) throws IOException; + } + + public PutField putFields() throws IOException + { + if (currentPutField != null) + return currentPutField; + + currentPutField = new PutField() + { + private byte[] prim_field_data + = new byte[currentObjectStreamClass.primFieldSize]; + private Object[] objs + = new Object[currentObjectStreamClass.objectFieldCount]; + + private ObjectStreamField getField (String name) + { + ObjectStreamField field + = currentObjectStreamClass.getField(name); + + if (field == null) + throw new IllegalArgumentException("no such serializable field " + name); + + return field; + } + + public void put(String name, boolean value) + { + ObjectStreamField field = getField(name); + + checkType(field, 'Z'); + prim_field_data[field.getOffset ()] = (byte)(value ? 1 : 0); + } + + public void put(String name, byte value) + { + ObjectStreamField field = getField(name); + + checkType(field, 'B'); + prim_field_data[field.getOffset()] = value; + } + + public void put(String name, char value) + { + ObjectStreamField field = getField(name); + + checkType(field, 'C'); + int off = field.getOffset(); + prim_field_data[off++] = (byte)(value >>> 8); + prim_field_data[off] = (byte)value; + } + + public void put(String name, double value) + { + ObjectStreamField field = getField (name); + + checkType(field, 'D'); + int off = field.getOffset(); + long l_value = Double.doubleToLongBits (value); + prim_field_data[off++] = (byte)(l_value >>> 52); + prim_field_data[off++] = (byte)(l_value >>> 48); + prim_field_data[off++] = (byte)(l_value >>> 40); + prim_field_data[off++] = (byte)(l_value >>> 32); + prim_field_data[off++] = (byte)(l_value >>> 24); + prim_field_data[off++] = (byte)(l_value >>> 16); + prim_field_data[off++] = (byte)(l_value >>> 8); + prim_field_data[off] = (byte)l_value; + } + + public void put(String name, float value) + { + ObjectStreamField field = getField(name); + + checkType(field, 'F'); + int off = field.getOffset(); + int i_value = Float.floatToIntBits(value); + prim_field_data[off++] = (byte)(i_value >>> 24); + prim_field_data[off++] = (byte)(i_value >>> 16); + prim_field_data[off++] = (byte)(i_value >>> 8); + prim_field_data[off] = (byte)i_value; + } + + public void put(String name, int value) + { + ObjectStreamField field = getField(name); + checkType(field, 'I'); + int off = field.getOffset(); + prim_field_data[off++] = (byte)(value >>> 24); + prim_field_data[off++] = (byte)(value >>> 16); + prim_field_data[off++] = (byte)(value >>> 8); + prim_field_data[off] = (byte)value; + } + + public void put(String name, long value) + { + ObjectStreamField field = getField(name); + checkType(field, 'J'); + int off = field.getOffset(); + prim_field_data[off++] = (byte)(value >>> 52); + prim_field_data[off++] = (byte)(value >>> 48); + prim_field_data[off++] = (byte)(value >>> 40); + prim_field_data[off++] = (byte)(value >>> 32); + prim_field_data[off++] = (byte)(value >>> 24); + prim_field_data[off++] = (byte)(value >>> 16); + prim_field_data[off++] = (byte)(value >>> 8); + prim_field_data[off] = (byte)value; + } + + public void put(String name, short value) + { + ObjectStreamField field = getField(name); + checkType(field, 'S'); + int off = field.getOffset(); + prim_field_data[off++] = (byte)(value >>> 8); + prim_field_data[off] = (byte)value; + } + + public void put(String name, Object value) + { + ObjectStreamField field = getField(name); + + if (value != null && + ! field.getType().isAssignableFrom(value.getClass ())) + throw new IllegalArgumentException("Class " + value.getClass() + + " cannot be cast to " + field.getType()); + objs[field.getOffset()] = value; + } + + public void write(ObjectOutput out) throws IOException + { + // Apparently Block data is not used with PutField as per + // empirical evidence against JDK 1.2. Also see Mauve test + // java.io.ObjectInputOutput.Test.GetPutField. + boolean oldmode = setBlockDataMode(false); + out.write(prim_field_data); + for (int i = 0; i < objs.length; ++ i) + out.writeObject(objs[i]); + setBlockDataMode(oldmode); + } + + private void checkType(ObjectStreamField field, char type) + throws IllegalArgumentException + { + if (TypeSignature.getEncodingOfClass(field.getType()).charAt(0) + != type) + throw new IllegalArgumentException(); + } + }; + // end PutFieldImpl + + return currentPutField; + } + + + public void writeFields() throws IOException + { + if (currentPutField == null) + throw new NotActiveException("writeFields can only be called after putFields has been called"); + + markFieldsWritten(); + currentPutField.write(this); + } + + + // write out the block-data buffer, picking the correct header + // depending on the size of the buffer + private void writeBlockDataHeader(int size) throws IOException + { + if (size < 256) + { + realOutput.writeByte(TC_BLOCKDATA); + realOutput.write(size); + } + else + { + realOutput.writeByte(TC_BLOCKDATALONG); + realOutput.writeInt(size); + } + } + + + // lookup the handle for OBJ, return null if OBJ doesn't have a + // handle yet + private int findHandle(Object obj) + { + return OIDLookupTable.get(obj); + } + + + // assigns the next availible handle to OBJ + private int assignNewHandle(Object obj) + { + OIDLookupTable.put(obj, nextOID); + return nextOID++; + } + + + // resets mapping from objects to handles + private void clearHandles() + { + nextOID = baseWireHandle; + OIDLookupTable.clear(); + } + + + // write out array size followed by each element of the array + private void writeArraySizeAndElements(Object array, Class clazz) + throws IOException + { + int length = Array.getLength(array); + + if (clazz.isPrimitive()) + { + if (clazz == Boolean.TYPE) + { + boolean[] cast_array = (boolean[])array; + realOutput.writeInt (length); + for (int i = 0; i < length; i++) + realOutput.writeBoolean(cast_array[i]); + return; + } + if (clazz == Byte.TYPE) + { + byte[] cast_array = (byte[])array; + realOutput.writeInt(length); + realOutput.write(cast_array, 0, length); + return; + } + if (clazz == Character.TYPE) + { + char[] cast_array = (char[])array; + realOutput.writeInt(length); + for (int i = 0; i < length; i++) + realOutput.writeChar(cast_array[i]); + return; + } + if (clazz == Double.TYPE) + { + double[] cast_array = (double[])array; + realOutput.writeInt(length); + for (int i = 0; i < length; i++) + realOutput.writeDouble(cast_array[i]); + return; + } + if (clazz == Float.TYPE) + { + float[] cast_array = (float[])array; + realOutput.writeInt(length); + for (int i = 0; i < length; i++) + realOutput.writeFloat(cast_array[i]); + return; + } + if (clazz == Integer.TYPE) + { + int[] cast_array = (int[])array; + realOutput.writeInt(length); + for (int i = 0; i < length; i++) + realOutput.writeInt(cast_array[i]); + return; + } + if (clazz == Long.TYPE) + { + long[] cast_array = (long[])array; + realOutput.writeInt (length); + for (int i = 0; i < length; i++) + realOutput.writeLong(cast_array[i]); + return; + } + if (clazz == Short.TYPE) + { + short[] cast_array = (short[])array; + realOutput.writeInt (length); + for (int i = 0; i < length; i++) + realOutput.writeShort(cast_array[i]); + return; + } + } + else + { + Object[] cast_array = (Object[])array; + realOutput.writeInt(length); + for (int i = 0; i < length; i++) + writeObject(cast_array[i]); + } + } + + +/* GCJ LOCAL */ + // writes out FIELDS of OBJECT for the specified ObjectStreamClass. + // FIELDS are already supposed already to be in canonical order, but + // under some circumstances (to do with Proxies) this isn't the + // case, so we call ensureFieldsSet(). + private void writeFields(Object obj, ObjectStreamClass osc) + throws IOException + { + osc.ensureFieldsSet(osc.forClass()); +/* END GCJ LOCAL */ + + ObjectStreamField[] fields = osc.fields; + boolean oldmode = setBlockDataMode(false); + + try + { + writeFields(obj,fields); + } + catch (IllegalArgumentException _) + { + InvalidClassException e = new InvalidClassException + ("writing fields of class " + osc.forClass().getName()); + e.initCause(_); + throw e; + } + catch (IOException e) + { + throw e; + } + catch (Exception _) + { + IOException e = new IOException("Unexpected exception " + _); + e.initCause(_); + throw(e); + } + + setBlockDataMode(oldmode); + } + + + /** + * Helper function for writeFields(Object,ObjectStreamClass): write + * fields from given fields array. Pass exception on. + * + * @param obj the object to be written + * + * @param fields the fields of obj to be written. + */ + private void writeFields(Object obj, ObjectStreamField[] fields) + throws + IllegalArgumentException, IllegalAccessException, IOException + { + for (int i = 0; i < fields.length; i++) + { + ObjectStreamField osf = fields[i]; + Field field = osf.field; + + if (DEBUG && dump) + dumpElementln ("WRITE FIELD: " + osf.getName() + " type=" + osf.getType()); + + switch (osf.getTypeCode()) + { + case 'Z': realOutput.writeBoolean(field.getBoolean(obj)); break; + case 'B': realOutput.writeByte (field.getByte (obj)); break; + case 'S': realOutput.writeShort (field.getShort (obj)); break; + case 'C': realOutput.writeChar (field.getChar (obj)); break; + case 'I': realOutput.writeInt (field.getInt (obj)); break; + case 'F': realOutput.writeFloat (field.getFloat (obj)); break; + case 'J': realOutput.writeLong (field.getLong (obj)); break; + case 'D': realOutput.writeDouble (field.getDouble (obj)); break; + case 'L': + case '[': writeObject (field.get (obj)); break; + default: + throw new IOException("Unexpected type code " + osf.getTypeCode()); + } + } + } + + + // Toggles writing primitive data to block-data buffer. + // Package-private to avoid a trampoline constructor. + boolean setBlockDataMode(boolean on) throws IOException + { + if (on == writeDataAsBlocks) + return on; + + drain(); + boolean oldmode = writeDataAsBlocks; + writeDataAsBlocks = on; + + if (on) + dataOutput = blockDataOutput; + else + dataOutput = realOutput; + + return oldmode; + } + + + private void callWriteMethod(Object obj, ObjectStreamClass osc) + throws IOException + { + currentPutField = null; + try + { + Object args[] = {this}; + osc.writeObjectMethod.invoke(obj, args); + } + catch (InvocationTargetException x) + { + /* Rethrow if possible. */ + Throwable exception = x.getTargetException(); + if (exception instanceof RuntimeException) + throw (RuntimeException) exception; + if (exception instanceof IOException) + throw (IOException) exception; + + IOException ioe + = new IOException("Exception thrown from writeObject() on " + + osc.forClass().getName() + ": " + + exception.getClass().getName()); + ioe.initCause(exception); + throw ioe; + } + catch (Exception x) + { + IOException ioe + = new IOException("Failure invoking writeObject() on " + + osc.forClass().getName() + ": " + + x.getClass().getName()); + ioe.initCause(x); + throw ioe; + } + } + + private void dumpElementln (String msg, Object obj) + { + try + { + for (int i = 0; i < depth; i++) + System.out.print (" "); + System.out.print (Thread.currentThread() + ": "); + System.out.print (msg); + if (java.lang.reflect.Proxy.isProxyClass(obj.getClass())) + System.out.print (obj.getClass()); + else + System.out.print (obj); + } + catch (Exception _) + { + } + finally + { + System.out.println (); + } + } + + private void dumpElementln (String msg) + { + for (int i = 0; i < depth; i++) + System.out.print (" "); + System.out.print (Thread.currentThread() + ": "); + System.out.println(msg); + } + + // this value comes from 1.2 spec, but is used in 1.1 as well + private static final int BUFFER_SIZE = 1024; + + private static int defaultProtocolVersion = PROTOCOL_VERSION_2; + + private DataOutputStream dataOutput; + private boolean writeDataAsBlocks; + private DataOutputStream realOutput; + private DataOutputStream blockDataOutput; + private byte[] blockData; + private int blockDataCount; + private Object currentObject; + // Package-private to avoid a trampoline. + ObjectStreamClass currentObjectStreamClass; + private PutField currentPutField; + private boolean fieldsAlreadyWritten; + private boolean replacementEnabled; + private boolean isSerializing; + private int nextOID; + private ObjectIdentityMap2Int OIDLookupTable; + private int protocolVersion; + private boolean useSubclassMethod; + private SetAccessibleAction setAccessible = new SetAccessibleAction(); + + // The nesting depth for debugging output + private int depth = 0; + + // Set if we're generating debugging dumps + private boolean dump = false; + + private static final boolean DEBUG = false; +} diff --git a/libjava/classpath/java/io/ObjectStreamClass.java b/libjava/classpath/java/io/ObjectStreamClass.java new file mode 100644 index 000000000..b71f54895 --- /dev/null +++ b/libjava/classpath/java/io/ObjectStreamClass.java @@ -0,0 +1,1161 @@ +/* ObjectStreamClass.java -- Class used to write class information + about serialized objects. + Copyright (C) 1998, 1999, 2000, 2001, 2003, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +import gnu.java.io.NullOutputStream; +import gnu.java.lang.reflect.TypeSignature; +import gnu.java.security.action.SetAccessibleAction; +import gnu.java.security.provider.Gnu; + +import java.lang.reflect.Constructor; +import java.lang.reflect.Field; +import java.lang.reflect.Member; +import java.lang.reflect.Method; +import java.lang.reflect.Modifier; +import java.lang.reflect.Proxy; +import java.security.AccessController; +import java.security.DigestOutputStream; +import java.security.MessageDigest; +import java.security.NoSuchAlgorithmException; +import java.security.PrivilegedAction; +import java.security.Security; +import java.util.Arrays; +import java.util.Comparator; +import java.util.Hashtable; + +/** + * @author Tom Tromey (tromey@redhat.com) + * @author Jeroen Frijters (jeroen@frijters.net) + * @author Guilhem Lavaux (guilhem@kaffe.org) + * @author Michael Koch (konqueror@gmx.de) + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + */ +public class ObjectStreamClass implements Serializable +{ + static final ObjectStreamField[] INVALID_FIELDS = new ObjectStreamField[0]; + + /** + * Returns the ObjectStreamClass for cl. + * If cl is null, or is not Serializable, + * null is returned. ObjectStreamClass's are memorized; + * later calls to this method with the same class will return the + * same ObjectStreamClass object and no recalculation + * will be done. + * + * Warning: If this class contains an invalid serialPersistentField arrays + * lookup will not throw anything. However {@link #getFields()} will return + * an empty array and {@link java.io.ObjectOutputStream#writeObject} will throw an + * {@link java.io.InvalidClassException}. + * + * @see java.io.Serializable + */ + public static ObjectStreamClass lookup(Class cl) + { + if (cl == null) + return null; + if (! (Serializable.class).isAssignableFrom(cl)) + return null; + + return lookupForClassObject(cl); + } + + /** + * This lookup for internal use by ObjectOutputStream. Suppose + * we have a java.lang.Class object C for class A, though A is not + * serializable, but it's okay to serialize C. + */ + static ObjectStreamClass lookupForClassObject(Class cl) + { + if (cl == null) + return null; + + ObjectStreamClass osc = classLookupTable.get(cl); + + if (osc != null) + return osc; + else + { + osc = new ObjectStreamClass(cl); + classLookupTable.put(cl, osc); + return osc; + } + } + + /** + * Returns the name of the class that this + * ObjectStreamClass represents. + * + * @return the name of the class. + */ + public String getName() + { + return name; + } + + /** + * Returns the class that this ObjectStreamClass + * represents. Null could be returned if this + * ObjectStreamClass was read from an + * ObjectInputStream and the class it represents cannot + * be found or loaded. + * + * @see java.io.ObjectInputStream + */ + public Class forClass() + { + return clazz; + } + + /** + * Returns the serial version stream-unique identifier for the class + * represented by this ObjectStreamClass. This SUID is + * either defined by the class as static final long + * serialVersionUID or is calculated as specified in + * Javasoft's "Object Serialization Specification" XXX: add reference + * + * @return the serial version UID. + */ + public long getSerialVersionUID() + { + return uid; + } + + /** + * Returns the serializable (non-static and non-transient) Fields + * of the class represented by this ObjectStreamClass. The Fields + * are sorted by name. + * If fields were obtained using serialPersistentFields and this array + * is faulty then the returned array of this method will be empty. + * + * @return the fields. + */ + public ObjectStreamField[] getFields() + { + ObjectStreamField[] copy = new ObjectStreamField[ fields.length ]; + System.arraycopy(fields, 0, copy, 0, fields.length); + return copy; + } + + // XXX doc + // Can't do binary search since fields is sorted by name and + // primitiveness. + public ObjectStreamField getField (String name) + { + for (int i = 0; i < fields.length; i++) + if (fields[i].getName().equals(name)) + return fields[i]; + return null; + } + + /** + * Returns a textual representation of this + * ObjectStreamClass object including the name of the + * class it represents as well as that class's serial version + * stream-unique identifier. + * + * @see #getSerialVersionUID() + * @see #getName() + */ + public String toString() + { + return "java.io.ObjectStreamClass< " + name + ", " + uid + " >"; + } + + // Returns true iff the class that this ObjectStreamClass represents + // has the following method: + // + // private void writeObject (ObjectOutputStream) + // + // This method is used by the class to override default + // serialization behavior. + boolean hasWriteMethod() + { + return (flags & ObjectStreamConstants.SC_WRITE_METHOD) != 0; + } + + // Returns true iff the class that this ObjectStreamClass represents + // implements Serializable but does *not* implement Externalizable. + boolean isSerializable() + { + return (flags & ObjectStreamConstants.SC_SERIALIZABLE) != 0; + } + + + // Returns true iff the class that this ObjectStreamClass represents + // implements Externalizable. + boolean isExternalizable() + { + return (flags & ObjectStreamConstants.SC_EXTERNALIZABLE) != 0; + } + + // Returns true iff the class that this ObjectStreamClass represents + // implements Externalizable. + boolean isEnum() + { + return (flags & ObjectStreamConstants.SC_ENUM) != 0; + } + + // Returns the ObjectStreamClass that represents the + // class that is the superclass of the class this + // ObjectStreamClass represents. If the superclass is + // not Serializable, null is returned. + ObjectStreamClass getSuper() + { + return superClass; + } + + /** + * returns an array of ObjectStreamClasses that represent the super + * classes of the class represented by this and the class + * represented by this itself in order from most super to this. + * ObjectStreamClass[0] is the highest superclass of this that is + * serializable. + * + * The result of consecutive calls this hierarchy() will be the same + * array instance. + * + * @return an array of ObjectStreamClass representing the + * super-class hierarchy of serializable classes. + */ + ObjectStreamClass[] hierarchy() + { + ObjectStreamClass[] result = hierarchy; + if (result == null) + { + int d = 0; + + for(ObjectStreamClass osc = this; osc != null; osc = osc.getSuper()) + d++; + + result = new ObjectStreamClass[d]; + + for (ObjectStreamClass osc = this; osc != null; osc = osc.getSuper()) + { + result[--d] = osc; + } + + hierarchy = result; + } + return result; + } + + /** + * Cache for hierarchy() result. + */ + private ObjectStreamClass[] hierarchy = null; + + // Returns an integer that consists of bit-flags that indicate + // properties of the class represented by this ObjectStreamClass. + // The bit-flags that could be present are those defined in + // ObjectStreamConstants that begin with `SC_' + int getFlags() + { + return flags; + } + + + ObjectStreamClass(String name, long uid, byte flags, + ObjectStreamField[] fields) + { + this.name = name; + this.uid = uid; + this.flags = flags; + this.fields = fields; + } + + /** + * This method builds the internal description corresponding to a Java Class. + * As the constructor only assign a name to the current ObjectStreamClass instance, + * that method sets the serial UID, chose the fields which will be serialized, + * and compute the position of the fields in the serialized stream. + * + * @param cl The Java class which is used as a reference for building the descriptor. + * @param superClass The descriptor of the super class for this class descriptor. + * @throws InvalidClassException if an incompatibility between computed UID and + * already set UID is found. + */ + void setClass(Class cl, ObjectStreamClass superClass) throws InvalidClassException + {hierarchy = null; + this.clazz = cl; + + cacheMethods(); + + long class_uid = getClassUID(cl); + if (uid == 0) + uid = class_uid; + else + { + // Check that the actual UID of the resolved class matches the UID from + // the stream. Mismatches for array classes are ignored. + if (!cl.isArray() && uid != class_uid) + { + String msg = cl + + ": Local class not compatible: stream serialVersionUID=" + + uid + ", local serialVersionUID=" + class_uid; + throw new InvalidClassException (msg); + } + } + + isProxyClass = clazz != null && Proxy.isProxyClass(clazz); + this.superClass = superClass; + calculateOffsets(); + + try + { + ObjectStreamField[] exportedFields = getSerialPersistentFields (clazz); + + if (exportedFields == null) + return; + + ObjectStreamField[] newFieldList = new ObjectStreamField[exportedFields.length + fields.length]; + int i, j, k; + + /* We now check the import fields against the exported fields. + * There should not be contradiction (e.g. int x and String x) + * but extra virtual fields can be added to the class. + */ + + Arrays.sort(exportedFields); + + i = 0; j = 0; k = 0; + while (i < fields.length && j < exportedFields.length) + { + int comp = fields[i].compareTo(exportedFields[j]); + + if (comp < 0) + { + newFieldList[k] = fields[i]; + fields[i].setPersistent(false); + fields[i].setToSet(false); + i++; + } + else if (comp > 0) + { + /* field not found in imported fields. We add it + * in the list of supported fields. + */ + newFieldList[k] = exportedFields[j]; + newFieldList[k].setPersistent(true); + newFieldList[k].setToSet(false); + try + { + newFieldList[k].lookupField(clazz); + newFieldList[k].checkFieldType(); + } + catch (NoSuchFieldException _) + { + } + j++; + } + else + { + try + { + exportedFields[j].lookupField(clazz); + exportedFields[j].checkFieldType(); + } + catch (NoSuchFieldException _) + { + } + + if (!fields[i].getType().equals(exportedFields[j].getType())) + throw new InvalidClassException + ("serialPersistentFields must be compatible with" + + " imported fields (about " + fields[i].getName() + ")"); + newFieldList[k] = fields[i]; + fields[i].setPersistent(true); + i++; + j++; + } + k++; + } + + if (i < fields.length) + for (;i"); + data_out.writeInt(Modifier.STATIC); + data_out.writeUTF("()V"); + } + + Constructor constructor; + Constructor[] constructors = cl.getDeclaredConstructors(); + Arrays.sort (constructors, memberComparator); + for (int i = 0; i < constructors.length; i++) + { + constructor = constructors[i]; + modifiers = constructor.getModifiers(); + if (Modifier.isPrivate(modifiers)) + continue; + + data_out.writeUTF(""); + data_out.writeInt(modifiers); + + // the replacement of '/' with '.' was needed to make computed + // SUID's agree with those computed by JDK + data_out.writeUTF + (TypeSignature.getEncodingOfConstructor(constructor).replace('/','.')); + } + + Method method; + Method[] methods = cl.getDeclaredMethods(); + Arrays.sort(methods, memberComparator); + for (int i = 0; i < methods.length; i++) + { + method = methods[i]; + modifiers = method.getModifiers(); + if (Modifier.isPrivate(modifiers)) + continue; + + data_out.writeUTF(method.getName()); + data_out.writeInt(modifiers); + + // the replacement of '/' with '.' was needed to make computed + // SUID's agree with those computed by JDK + data_out.writeUTF + (TypeSignature.getEncodingOfMethod(method).replace('/', '.')); + } + + data_out.close(); + byte[] sha = md.digest(); + result = 0; + int len = sha.length < 8 ? sha.length : 8; + for (int i = 0; i < len; i++) + result += (long) (sha[i] & 0xFF) << (8 * i); + + return result; + } + + /** + * Returns the value of CLAZZ's private static final field named + * `serialPersistentFields'. It performs some sanity checks before + * returning the real array. Besides, the returned array is a clean + * copy of the original. So it can be modified. + * + * @param clazz Class to retrieve 'serialPersistentFields' from. + * @return The content of 'serialPersistentFields'. + */ + private ObjectStreamField[] getSerialPersistentFields(Class clazz) + throws NoSuchFieldException, IllegalAccessException + { + ObjectStreamField[] fieldsArray = null; + ObjectStreamField[] o; + + // Use getDeclaredField rather than getField for the same reason + // as above in getDefinedSUID. + Field f = clazz.getDeclaredField("serialPersistentFields"); + f.setAccessible(true); + + int modifiers = f.getModifiers(); + if (!(Modifier.isStatic(modifiers) && + Modifier.isFinal(modifiers) && + Modifier.isPrivate(modifiers))) + return null; + + o = (ObjectStreamField[]) f.get(null); + + if (o == null) + return null; + + fieldsArray = new ObjectStreamField[ o.length ]; + System.arraycopy(o, 0, fieldsArray, 0, o.length); + + return fieldsArray; + } + + /** + * Returns a new instance of the Class this ObjectStreamClass corresponds + * to. + * Note that this should only be used for Externalizable classes. + * + * @return A new instance. + */ + Externalizable newInstance() throws InvalidClassException + { + synchronized(this) + { + if (constructor == null) + { + try + { + final Constructor c = clazz.getConstructor(new Class[0]); + + AccessController.doPrivileged(new PrivilegedAction() + { + public Object run() + { + c.setAccessible(true); + return null; + } + }); + + constructor = c; + } + catch(NoSuchMethodException x) + { + throw new InvalidClassException(clazz.getName(), + "No public zero-argument constructor"); + } + } + } + + try + { + return (Externalizable)constructor.newInstance(); + } + catch(Exception x) + { + throw (InvalidClassException) + new InvalidClassException(clazz.getName(), + "Unable to instantiate").initCause(x); + } + } + + public static final ObjectStreamField[] NO_FIELDS = {}; + + private static Hashtable classLookupTable + = new Hashtable(); + private static final NullOutputStream nullOutputStream = new NullOutputStream(); + private static final Comparator interfaceComparator = new InterfaceComparator(); + private static final Comparator memberComparator = new MemberComparator(); + private static final + Class[] writeMethodArgTypes = { java.io.ObjectOutputStream.class }; + + private ObjectStreamClass superClass; + private Class clazz; + private String name; + private long uid; + private byte flags; + + // this field is package protected so that ObjectInputStream and + // ObjectOutputStream can access it directly + ObjectStreamField[] fields; + + // these are accessed by ObjectIn/OutputStream + int primFieldSize = -1; // -1 if not yet calculated + int objectFieldCount; + + Method readObjectMethod; + Method readResolveMethod; + Method writeReplaceMethod; + Method writeObjectMethod; + boolean realClassIsSerializable; + boolean realClassIsExternalizable; + ObjectStreamField[] fieldMapping; + Constructor firstNonSerializableParentConstructor; + private Constructor constructor; // default constructor for Externalizable + + boolean isProxyClass = false; + +/* GCJ LOCAL */ + // True after setFields() has been called + private boolean fieldsSet = false; +/* END GCJ LOCAL */ + + // This is probably not necessary because this class is special cased already + // but it will avoid showing up as a discrepancy when comparing SUIDs. + private static final long serialVersionUID = -6120832682080437368L; + + + // interfaces are compared only by name + private static final class InterfaceComparator implements Comparator + { + public int compare(Object o1, Object o2) + { + return ((Class) o1).getName().compareTo(((Class) o2).getName()); + } + } + + + // Members (Methods and Constructors) are compared first by name, + // conflicts are resolved by comparing type signatures + private static final class MemberComparator implements Comparator + { + public int compare(Object o1, Object o2) + { + Member m1 = (Member) o1; + Member m2 = (Member) o2; + + int comp = m1.getName().compareTo(m2.getName()); + + if (comp == 0) + return TypeSignature.getEncodingOfMember(m1). + compareTo(TypeSignature.getEncodingOfMember(m2)); + else + return comp; + } + } +} diff --git a/libjava/classpath/java/io/ObjectStreamConstants.java b/libjava/classpath/java/io/ObjectStreamConstants.java new file mode 100644 index 000000000..8f70196c9 --- /dev/null +++ b/libjava/classpath/java/io/ObjectStreamConstants.java @@ -0,0 +1,226 @@ +/* ObjectStreamConstants.java -- Interface containing constant values + used in reading and writing serialized objects + Copyright (C) 1998, 1999, 2003, 2006 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This interface contains constants that are used in object + * serialization. This interface is used by ObjectOutputStream, + * ObjectInputStream, and ObjectStreamClass. + * The values for these constants are specified by the Java library + * specification. + * + * @since 1.1 + */ +public interface ObjectStreamConstants +{ + /** + * The serialization stream protocol version 1. This version was + * the default serialization protocol before JDK 1.2. + * + * @see ObjectOutputStream#useProtocolVersion(int) + * @since 1.2 + */ + int PROTOCOL_VERSION_1 = 1; + + /** + * The serialization stream protocol version 2. This version is + * used as the default serialization protocol since JDK 1.2. + * + * @see ObjectOutputStream#useProtocolVersion(int) + * @since 1.2 + */ + int PROTOCOL_VERSION_2 = 2; + + /** + * The magic number that is written as part of the stream header. + */ + short STREAM_MAGIC = (short)0xaced; + + /** + * The stream version number that is written as part of the stream header. + * Note that this is different from the protocol version that specifies + * the data format for the stream. + */ + short STREAM_VERSION = 5; + + /** + * Token value to designate a null reference in the stream. + */ + byte TC_NULL = (byte)112; //0x70 + + /** + * Token value to designate a reference to an already serialized object. + */ + byte TC_REFERENCE = (byte)113; //0x71 + + /** + * Token value to designate a class descriptor is next in the stream. + */ + byte TC_CLASSDESC = (byte)114; //0x72 + + /** + * Token value to designate a new object is next in the stream. + */ + byte TC_OBJECT = (byte)115; //0x73 + + /** + * Token value to designate a new string is next in the stream. + */ + byte TC_STRING = (byte)116; //0x74 + + /** + * Token value to designate a new array is next in the stream. + */ + byte TC_ARRAY = (byte)117; //0x75 + + /** + * Token reference to designate a reference to a class. + */ + byte TC_CLASS = (byte)118; //0x76 + + /** + * Token value to designate a block of primitive data is next in the stream. + * The next byte in the stream holds the size of the block (in bytes). + */ + byte TC_BLOCKDATA = (byte)119; //0x77 + + /** + * Token value to designate the end of a block of primitve data. + */ + byte TC_ENDBLOCKDATA = (byte)120; //0x78 + + /** + * Token value to designate a reset of the stream state. + */ + byte TC_RESET = (byte)121; //0x79 + + /** + * Token value to designate a long block of primitive data is next in the + * stream. The next long in the stream holds the size of the block + * (in bytes). + */ + byte TC_BLOCKDATALONG = (byte)122; //0x7A + + /** + * Token value to designate an exception occured during serialization. + */ + byte TC_EXCEPTION = (byte)123; //0x7B + + /** + * Token value to designate a long string is next in the stream. + */ + byte TC_LONGSTRING = (byte)124; //0x7C + + /** + * Token value to designate a proxy class descriptor is next in the stream. + */ + byte TC_PROXYCLASSDESC = (byte)125; //0x7D + + /** + * Token value to designate an enum constant is next in the stream. + * + * @since 1.5 + */ + byte TC_ENUM = (byte)126; //0x7E + + /** + * The first token value. + */ + byte TC_BASE = TC_NULL; + + /** + * The last token value. + */ + byte TC_MAX = TC_ENUM; + + /** + * The first handle that will be assigned to an object, for later references. + */ + int baseWireHandle = 0x7e0000; + + /** + * Flag used in ObjectStreamClass to designate that the class + * defines the writeObject method. + */ + byte SC_WRITE_METHOD = 0x01; + + /** + * Flag used in ObjectStreamClass to designate that the class + * is serializeable. + */ + byte SC_SERIALIZABLE = 0x02; + + /** + * Flag used in ObjectStreamClass to designate that the class + * is externalizable. + */ + byte SC_EXTERNALIZABLE = 0x04; + + /** + * Flag used in ObjectStreamClass to designate that + * externalizable data is written in block data mode. + * + * @since 1.2 + */ + byte SC_BLOCK_DATA = 0x08; + + /** + * Flag used in ObjectStreamClass to designate that the class + * is an enum constant. + * + * @since 1.5 + */ + byte SC_ENUM = 0x10; + + /** + * Constant for use with a SecurityManager to check if + * substitution of objects is allowed. + */ + SerializablePermission SUBSTITUTION_PERMISSION + = new SerializablePermission("enableSubstitution"); + + /** + * Constant for use with a SecurityManager to check if + * overriding of the writeObject and readObject + * methods is allowed. + */ + SerializablePermission SUBCLASS_IMPLEMENTATION_PERMISSION + = new SerializablePermission("enableSubclassImplementation"); +} diff --git a/libjava/classpath/java/io/ObjectStreamException.java b/libjava/classpath/java/io/ObjectStreamException.java new file mode 100644 index 000000000..61d4dd09e --- /dev/null +++ b/libjava/classpath/java/io/ObjectStreamException.java @@ -0,0 +1,74 @@ +/* ObjectStreamException.java -- Superclass of all serialization exceptions + Copyright (C) 1998, 2000, 2001, 2002, 2003, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This exception is thrown when a problem occurs during serialization. + * There are more specific subclasses that give more fine grained + * indications of the precise failure. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Warren Levy (warrenl@cygnus.com) + * @since 1.1 + * @status updated to 1.4 + */ +public abstract class ObjectStreamException extends IOException +{ + /** + * Compatible with JDK 1.1+. + */ + private static final long serialVersionUID = 7260898174833392607L; + + /** + * Create an exception without a descriptive error message. + */ + protected ObjectStreamException() + { + } + + /** + * Create an exception with a descriptive error message. + * + * @param message the descriptive error message + */ + protected ObjectStreamException(String message) + { + super(message); + } +} // class ObjectStreamException diff --git a/libjava/classpath/java/io/ObjectStreamField.java b/libjava/classpath/java/io/ObjectStreamField.java new file mode 100644 index 000000000..dfb6728a7 --- /dev/null +++ b/libjava/classpath/java/io/ObjectStreamField.java @@ -0,0 +1,401 @@ +/* ObjectStreamField.java -- Class used to store name and class of fields + Copyright (C) 1998, 1999, 2003, 2004, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +import gnu.java.lang.reflect.TypeSignature; + +import java.lang.reflect.Field; +import java.security.AccessController; +import java.security.PrivilegedAction; + +/** + * This class intends to describe the field of a class for the serialization + * subsystem. Serializable fields in a serializable class can be explicitly + * exported using an array of ObjectStreamFields. + * + * @author Tom Tromey (tromey@redhat.com) + * @author Jeroen Frijters (jeroen@frijters.net) + * @author Guilhem Lavaux (guilhem@kaffe.org) + * @author Michael Koch (konqueror@gmx.de) + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + */ +public class ObjectStreamField + implements Comparable +{ + private String name; + private Class type; + private String typename; + private int offset = -1; // XXX make sure this is correct + private boolean unshared; + private boolean persistent = false; + private boolean toset = true; + Field field; + + ObjectStreamField (Field field) + { + this (field.getName(), field.getType()); + this.field = field; + } + + /** + * This constructor creates an ObjectStreamField instance + * which represents a field named name and is + * of the type type. + * + * @param name Name of the field to export. + * @param type Type of the field in the concerned class. + */ + public ObjectStreamField (String name, Class type) + { + this (name, type, false); + } + + /** + * This constructor creates an ObjectStreamField instance + * which represents a field named name and is + * of the type type. + * + * @param name Name of the field to export. + * @param type Type of the field in the concerned class. + * @param unshared true if field will be unshared, false otherwise. + */ + public ObjectStreamField (String name, Class type, boolean unshared) + { + if (name == null) + throw new NullPointerException(); + + this.name = name; + this.type = type; + this.typename = TypeSignature.getEncodingOfClass(type); + this.unshared = unshared; + } + + /** + * There are many cases you can not get java.lang.Class from typename + * if your context class loader cannot load it, then use typename to + * construct the field. + * + * @param name Name of the field to export. + * @param typename The coded name of the type for this field. + */ + ObjectStreamField (String name, String typename) + { + this.name = name; + this.typename = typename; + } + + void resolveType(ClassLoader loader) + { + try + { + type = TypeSignature.getClassForEncoding(typename, true, loader); + } + catch(ClassNotFoundException e) + { + } + } + + /** + * This method returns the name of the field represented by the + * ObjectStreamField instance. + * + * @return A string containing the name of the field. + */ + public String getName () + { + return name; + } + + /** + * This method returns the class representing the type of the + * field which is represented by this instance of ObjectStreamField. + * + * @return A class representing the type of the field. + */ + public Class getType () + { + return type; + } + + /** + * This method returns the char encoded type of the field which + * is represented by this instance of ObjectStreamField. + * + * @return A char representing the type of the field. + */ + public char getTypeCode () + { + return typename.charAt (0); + } + + /** + * This method returns a more explicit type name than + * {@link #getTypeCode()} in the case the type is a real + * class (and not a primitive). + * + * @return The name of the type (class name) if it is not a + * primitive, in the other case null is returned. + */ + public String getTypeString () + { + // use intern() + if (isPrimitive()) + return null; + return typename.intern(); + } + + /** + * This method returns the current offset of the field in + * the serialization stream relatively to the other fields. + * The offset is expressed in bytes. + * + * @return The offset of the field in bytes. + * @see #setOffset(int) + */ + public int getOffset () + { + return offset; + } + + /** + * This method sets the current offset of the field. + * + * @param off The offset of the field in bytes. + * @see #getOffset() + */ + protected void setOffset (int off) + { + offset = off; + } + + /** + * This method returns whether the field represented by this object is + * unshared or not. + * + * @return Tells if this field is unshared or not. + */ + public boolean isUnshared () + { + return unshared; + } + + /** + * This method returns true if the type of the field + * represented by this instance is a primitive. + * + * @return true if the type is a primitive, false + * in the other case. + */ + public boolean isPrimitive () + { + return typename.length() == 1; + } + + /** + * Compares this object to the given object. + * + * @param obj the object to compare to. + * + * @return -1, 0 or 1. + */ + public int compareTo (Object obj) + { + ObjectStreamField f = (ObjectStreamField) obj; + boolean this_is_primitive = isPrimitive (); + boolean f_is_primitive = f.isPrimitive (); + + if (this_is_primitive && !f_is_primitive) + return -1; + + if (!this_is_primitive && f_is_primitive) + return 1; + + return getName ().compareTo (f.getName ()); + } + + /** + * This method is specific to classpath's implementation and so has the default + * access. It changes the state of this field to "persistent". It means that + * the field should not be changed when the stream is read (if it is not + * explicitly specified using serialPersistentFields). + * + * @param persistent True if the field is persistent, false in the + * other cases. + * @see #isPersistent() + */ + void setPersistent(boolean persistent) + { + this.persistent = persistent; + } + + /** + * This method returns true if the field is marked as persistent. + * + * @return True if persistent, false in the other cases. + * @see #setPersistent(boolean) + */ + boolean isPersistent() + { + return persistent; + } + + /** + * This method is specific to classpath's implementation and so + * has the default access. It changes the state of this field as + * to be set by ObjectInputStream. + * + * @param toset True if this field should be set, false in the other + * cases. + * @see #isToSet() + */ + void setToSet(boolean toset) + { + this.toset = toset; + } + + /** + * This method returns true if the field is marked as to be + * set. + * + * @return True if it is to be set, false in the other cases. + * @see #setToSet(boolean) + */ + boolean isToSet() + { + return toset; + } + + /** + * This method searches for its field reference in the specified class + * object. It requests privileges. If an error occurs the internal field + * reference is not modified. + * + * @throws NoSuchFieldException if the field name does not exist in this class. + * @throws SecurityException if there was an error requesting the privileges. + */ + void lookupField(Class clazz) throws NoSuchFieldException, SecurityException + { + final Field f = clazz.getDeclaredField(name); + + AccessController.doPrivileged(new PrivilegedAction() + { + public Object run() + { + f.setAccessible(true); + return null; + } + }); + + this.field = f; + } + + /** + * This method check whether the field described by this + * instance of ObjectStreamField is compatible with the + * actual implementation of this field. + * + * @throws NullPointerException if this field does not exist + * in the real class. + * @throws InvalidClassException if the types are incompatible. + */ + void checkFieldType() throws InvalidClassException + { + Class ftype = field.getType(); + + if (!ftype.isAssignableFrom(type)) + throw new InvalidClassException + ("invalid field type for " + name + + " in class " + field.getDeclaringClass()); + } + + /** + * Returns a string representing this object. + * + * @return the string. + */ + public String toString () + { + return "ObjectStreamField< " + type + " " + name + " >"; + } + + final void setBooleanField(Object obj, boolean val) + { + VMObjectStreamClass.setBooleanNative(field, obj, val); + } + + final void setByteField(Object obj, byte val) + { + VMObjectStreamClass.setByteNative(field, obj, val); + } + + final void setCharField(Object obj, char val) + { + VMObjectStreamClass.setCharNative(field, obj, val); + } + + final void setShortField(Object obj, short val) + { + VMObjectStreamClass.setShortNative(field, obj, val); + } + + final void setIntField(Object obj, int val) + { + VMObjectStreamClass.setIntNative(field, obj, val); + } + + final void setLongField(Object obj, long val) + { + VMObjectStreamClass.setLongNative(field, obj, val); + } + + final void setFloatField(Object obj, float val) + { + VMObjectStreamClass.setFloatNative(field, obj, val); + } + + final void setDoubleField(Object obj, double val) + { + VMObjectStreamClass.setDoubleNative(field, obj, val); + } + + final void setObjectField(Object obj, Object val) + { + VMObjectStreamClass.setObjectNative(field, obj, val); + } +} diff --git a/libjava/classpath/java/io/OptionalDataException.java b/libjava/classpath/java/io/OptionalDataException.java new file mode 100644 index 000000000..8d8b1bda0 --- /dev/null +++ b/libjava/classpath/java/io/OptionalDataException.java @@ -0,0 +1,91 @@ +/* OptionalDataException.java -- indicates unexpected data in serialized stream + Copyright (C) 1998, 2000, 2001, 2002, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This exception is thrown when unexpected data appears in the input + * stream from which a serialized object is being read. There are two + * cases:
    + *
  • The next stream element is primitive data. eof will + * be false, and count is the number of bytes of primitive + * data available.
    • + *
  • The data consumable by readObject or readExternal has been exhausted. + * eof is true, and count is 0.
    • + *
+ * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Warren Levy (warrenl@cygnus.com) + * @since 1.1 + * @status updated to 1.4 + */ +public class OptionalDataException extends ObjectStreamException +{ + /** + * Compatible with JDK 1.1+. + */ + private static final long serialVersionUID = -8011121865681257820L; + + /** + * Whether or not the end of the stream has been reached. + * + * @serial the end of the buffer was reached + */ + public boolean eof; + + /** + * The number of valid bytes that can be read. + * + * @serial the bytes of the buffer remaining + */ + public int length; + + /** + * Create a new OptionalDataException with an eof parameter indicating + * whether or not the end of stream is reached and the number of valid + * bytes that may be read. + * + * @param eof 'true' if end of stream reached, 'false' otherwise + * @param count The number of valid bytes to be read + */ + OptionalDataException(boolean eof, int count) + { + this.eof = eof; + this.length = count; + } +} // class OptionalDataException diff --git a/libjava/classpath/java/io/OutputStream.java b/libjava/classpath/java/io/OutputStream.java new file mode 100644 index 000000000..5ba9478e3 --- /dev/null +++ b/libjava/classpath/java/io/OutputStream.java @@ -0,0 +1,140 @@ +/* OutputStream.java -- Base class for byte output streams + Copyright (C) 1998, 1999, 2001, 2004, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This abstract class forms the base of the hierarchy of classes that + * write output as a stream of bytes. It provides a common set of methods + * for writing bytes to stream. Subclasses implement and/or extend these + * methods to write bytes in a particular manner or to a particular + * destination such as a file on disk or network connection. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + */ +public abstract class OutputStream implements Closeable, Flushable +{ + /** + * This is the default no-argument constructor for this class. This method + * does nothing in this class. + */ + public OutputStream () + { + } + + /** + * This method writes a single byte to the output stream. The byte written + * is the low eight bits of the int passed and a argument. + *

+ * Subclasses must provide an implementation of this abstract method + * + * @param b The byte to be written to the output stream, passed as + * the low eight bits of an int + * + * @exception IOException If an error occurs + */ + public abstract void write (int b) throws IOException; + + /** + * This method all the writes bytes from the passed array to the + * output stream. This method is equivalent to write(b, 0, + * buf.length) which is exactly how it is implemented in this + * class. + * + * @param b The array of bytes to write + * + * @exception IOException If an error occurs + */ + public void write (byte[] b) throws IOException, NullPointerException + { + write (b, 0, b.length); + } + + /** + * This method writes len bytes from the specified array + * b starting at index off into the array. + *

+ * This method in this class calls the single byte write() + * method in a loop until all bytes have been written. Subclasses should + * override this method if possible in order to provide a more efficent + * implementation. + * + * @param b The array of bytes to write from + * @param off The index into the array to start writing from + * @param len The number of bytes to write + * + * @exception IOException If an error occurs + */ + public void write (byte[] b, int off, int len) + throws IOException, NullPointerException, IndexOutOfBoundsException + { + if (off < 0 || len < 0 || off + len > b.length) + throw new ArrayIndexOutOfBoundsException (); + for (int i = 0; i < len; ++i) + write (b[off + i]); + } + + /** + * This method forces any data that may have been buffered to be written + * to the underlying output device. Please note that the host environment + * might perform its own buffering unbeknowst to Java. In that case, a + * write made (for example, to a disk drive) might be cached in OS + * buffers instead of actually being written to disk. + *

+ * This method in this class does nothing. + * + * @exception IOException If an error occurs + */ + public void flush () throws IOException + { + } + + /** + * This method closes the stream. Any internal or native resources + * associated with this stream are freed. Any subsequent attempt to + * access the stream might throw an exception. + *

+ * This method in this class does nothing. + * + * @exception IOException If an error occurs + */ + public void close () throws IOException + { + } +} diff --git a/libjava/classpath/java/io/OutputStreamWriter.java b/libjava/classpath/java/io/OutputStreamWriter.java new file mode 100644 index 000000000..27067fdb9 --- /dev/null +++ b/libjava/classpath/java/io/OutputStreamWriter.java @@ -0,0 +1,429 @@ +/* OutputStreamWriter.java -- Writer that converts chars to bytes + Copyright (C) 1998, 1999, 2000, 2001, 2003, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +import gnu.java.nio.charset.EncodingHelper; + +import java.nio.ByteBuffer; +import java.nio.CharBuffer; +import java.nio.charset.CharacterCodingException; +import java.nio.charset.Charset; +import java.nio.charset.CharsetEncoder; +import java.nio.charset.CodingErrorAction; +import java.nio.charset.MalformedInputException; + +/** + * This class writes characters to an output stream that is byte oriented + * It converts the chars that are written to bytes using an encoding layer, + * which is specific to a particular encoding standard. The desired + * encoding can either be specified by name, or if no encoding is specified, + * the system default encoding will be used. The system default encoding + * name is determined from the system property file.encoding. + * The only encodings that are guaranteed to be available are "8859_1" + * (the Latin-1 character set) and "UTF8". Unfortunately, Java does not + * provide a mechanism for listing the encodings that are supported in + * a given implementation. + *

+ * Here is a list of standard encoding names that may be available: + *

+ *

    + *
  • 8859_1 (ISO-8859-1/Latin-1) + *
  • 8859_2 (ISO-8859-2/Latin-2) + *
  • 8859_3 (ISO-8859-3/Latin-3) + *
  • 8859_4 (ISO-8859-4/Latin-4) + *
  • 8859_5 (ISO-8859-5/Latin-5) + *
  • 8859_6 (ISO-8859-6/Latin-6) + *
  • 8859_7 (ISO-8859-7/Latin-7) + *
  • 8859_8 (ISO-8859-8/Latin-8) + *
  • 8859_9 (ISO-8859-9/Latin-9) + *
  • ASCII (7-bit ASCII) + *
  • UTF8 (UCS Transformation Format-8) + *
  • More Later + *
+ * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Per Bothner (bothner@cygnus.com) + * @date April 17, 1998. + */ +public class OutputStreamWriter extends Writer +{ + /** + * The output stream. + */ + private OutputStream out; + + /** + * The charset encoder. + */ + private final CharsetEncoder encoder; + + /** + * java.io canonical name of the encoding. + */ + private final String encodingName; + + /** + * Buffer output before character conversion as it has costly overhead. + */ + private final CharBuffer outputBuffer; + private final static int BUFFER_SIZE = 1024; + + /** + * This method initializes a new instance of OutputStreamWriter + * to write to the specified stream using a caller supplied character + * encoding scheme. Note that due to a deficiency in the Java language + * design, there is no way to determine which encodings are supported. + * + * @param out The OutputStream to write to + * @param encoding_scheme The name of the encoding scheme to use for + * character to byte translation + * + * @exception UnsupportedEncodingException If the named encoding is + * not available. + */ + public OutputStreamWriter (OutputStream out, String encoding_scheme) + throws UnsupportedEncodingException + { + CharsetEncoder encoder; + String encodingName; + this.out = out; + outputBuffer = CharBuffer.allocate(BUFFER_SIZE); + + try + { + // Don't use NIO if avoidable + if(EncodingHelper.isISOLatin1(encoding_scheme)) + { + encodingName = "ISO8859_1"; + encoder = null; + } + else + { + /* + * Workaround for encodings with a byte-order-mark. + * We only want to write it once per stream. + */ + try + { + if(encoding_scheme.equalsIgnoreCase("UnicodeBig") || + encoding_scheme.equalsIgnoreCase("UTF-16") || + encoding_scheme.equalsIgnoreCase("UTF16")) + { + encoding_scheme = "UTF-16BE"; + out.write((byte)0xFE); + out.write((byte)0xFF); + } + else if(encoding_scheme.equalsIgnoreCase("UnicodeLittle")) + { + encoding_scheme = "UTF-16LE"; + out.write((byte)0xFF); + out.write((byte)0xFE); + } + } + catch(IOException ioe) + { + } + + Charset cs = EncodingHelper.getCharset(encoding_scheme); + if(cs == null) + throw new UnsupportedEncodingException("Encoding "+encoding_scheme+ + " unknown"); + encoder = cs.newEncoder(); + encodingName = EncodingHelper.getOldCanonical(cs.name()); + + encoder.onMalformedInput(CodingErrorAction.REPLACE); + encoder.onUnmappableCharacter(CodingErrorAction.REPLACE); + } + } + catch(RuntimeException e) + { + // Default to ISO Latin-1, will happen if this is called, for instance, + // before the NIO provider is loadable. + encoder = null; + encodingName = "ISO8859_1"; + } + this.encoder = encoder; + this.encodingName = encodingName; + } + + /** + * This method initializes a new instance of OutputStreamWriter + * to write to the specified stream using the default encoding. + * + * @param out The OutputStream to write to + */ + public OutputStreamWriter (OutputStream out) + { + CharsetEncoder encoder; + String encodingName; + this.out = out; + outputBuffer = CharBuffer.allocate(BUFFER_SIZE); + try + { + String encoding = System.getProperty("file.encoding"); + Charset cs = Charset.forName(encoding); + encoder = cs.newEncoder(); + encodingName = EncodingHelper.getOldCanonical(cs.name()); + } + catch(RuntimeException e) + { + encoder = null; + encodingName = "ISO8859_1"; + } + + if(encoder != null) + { + encoder.onMalformedInput(CodingErrorAction.REPLACE); + encoder.onUnmappableCharacter(CodingErrorAction.REPLACE); + } + this.encoder = encoder; + this.encodingName = encodingName; + } + + /** + * This method initializes a new instance of OutputStreamWriter + * to write to the specified stream using a given Charset. + * + * @param out The OutputStream to write to + * @param cs The Charset of the encoding to use + * + * @since 1.5 + */ + public OutputStreamWriter(OutputStream out, Charset cs) + { + this.out = out; + encoder = cs.newEncoder(); + encoder.onMalformedInput(CodingErrorAction.REPLACE); + encoder.onUnmappableCharacter(CodingErrorAction.REPLACE); + outputBuffer = CharBuffer.allocate(BUFFER_SIZE); + encodingName = EncodingHelper.getOldCanonical(cs.name()); + } + + /** + * This method initializes a new instance of OutputStreamWriter + * to write to the specified stream using a given + * CharsetEncoder. + * + * @param out The OutputStream to write to + * @param enc The CharsetEncoder to encode the output with + * + * @since 1.5 + */ + public OutputStreamWriter(OutputStream out, CharsetEncoder enc) + { + this.out = out; + encoder = enc; + outputBuffer = CharBuffer.allocate(BUFFER_SIZE); + Charset cs = enc.charset(); + if (cs == null) + encodingName = "US-ASCII"; + else + encodingName = EncodingHelper.getOldCanonical(cs.name()); + } + + /** + * This method closes this stream, and the underlying + * OutputStream + * + * @exception IOException If an error occurs + */ + public void close () throws IOException + { + if(out == null) + return; + flush(); + out.close (); + out = null; + } + + /** + * This method returns the name of the character encoding scheme currently + * in use by this stream. If the stream has been closed, then this method + * may return null. + * + * @return The encoding scheme name + */ + public String getEncoding () + { + return out != null ? encodingName : null; + } + + /** + * This method flushes any buffered bytes to the underlying output sink. + * + * @exception IOException If an error occurs + */ + public void flush () throws IOException + { + if(out != null){ + if(outputBuffer != null){ + char[] buf = new char[outputBuffer.position()]; + if(buf.length > 0){ + outputBuffer.flip(); + outputBuffer.get(buf); + writeConvert(buf, 0, buf.length); + outputBuffer.clear(); + } + } + out.flush (); + } + } + + /** + * This method writes count characters from the specified + * array to the output stream starting at position offset + * into the array. + * + * @param buf The array of character to write from + * @param offset The offset into the array to start writing chars from + * @param count The number of chars to write. + * + * @exception IOException If an error occurs + */ + public void write (char[] buf, int offset, int count) throws IOException + { + if(out == null) + throw new IOException("Stream is closed."); + if(buf == null) + throw new IOException("Buffer is null."); + + if(outputBuffer != null) + { + if(count >= outputBuffer.remaining()) + { + int r = outputBuffer.remaining(); + outputBuffer.put(buf, offset, r); + writeConvert(outputBuffer.array(), 0, BUFFER_SIZE); + outputBuffer.clear(); + offset += r; + count -= r; + // if the remaining bytes is larger than the whole buffer, + // just don't buffer. + if(count >= outputBuffer.remaining()){ + writeConvert(buf, offset, count); + return; + } + } + outputBuffer.put(buf, offset, count); + } else writeConvert(buf, offset, count); + } + + /** + * Converts and writes characters. + */ + private void writeConvert (char[] buf, int offset, int count) + throws IOException + { + if(encoder == null) + { + byte[] b = new byte[count]; + for(int i=0;icount bytes from the specified + * String starting at position offset into the + * String. + * + * @param str The String to write chars from + * @param offset The position in the String to start + * writing chars from + * @param count The number of chars to write + * + * @exception IOException If an error occurs + */ + public void write (String str, int offset, int count) throws IOException + { + if(str == null) + throw new IOException("String is null."); + + write(str.toCharArray(), offset, count); + } + + /** + * This method writes a single character to the output stream. + * + * @param ch The char to write, passed as an int. + * + * @exception IOException If an error occurs + */ + public void write (int ch) throws IOException + { + // No buffering, no encoding ... just pass through + if (encoder == null && outputBuffer == null) { + out.write(nullConversion((char)ch)); + } else { + if (outputBuffer != null) { + if (outputBuffer.remaining() == 0) { + writeConvert(outputBuffer.array(), 0, BUFFER_SIZE); + outputBuffer.clear(); + } + outputBuffer.put((char)ch); + } else { + writeConvert(new char[]{ (char)ch }, 0, 1); + } + } + } +} // class OutputStreamWriter diff --git a/libjava/classpath/java/io/PipedInputStream.java b/libjava/classpath/java/io/PipedInputStream.java new file mode 100644 index 000000000..0171a1b6f --- /dev/null +++ b/libjava/classpath/java/io/PipedInputStream.java @@ -0,0 +1,413 @@ +/* PipedInputStream.java -- Read portion of piped streams. + Copyright (C) 1998, 1999, 2000, 2001, 2003, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package java.io; + +// NOTE: This implementation is very similar to that of PipedReader. If you +// fix a bug in here, chances are you should make a similar change to the +// PipedReader code. + +/** + * An input stream that reads its bytes from an output stream + * to which it is connected. + *

+ * Data is read and written to an internal buffer. It is highly recommended + * that the PipedInputStream and connected + * PipedOutputStream + * be part of different threads. If they are not, the read and write + * operations could deadlock their thread. + * + * @specnote The JDK implementation appears to have some undocumented + * functionality where it keeps track of what thread is writing + * to pipe and throws an IOException if that thread susequently + * dies. This behaviour seems dubious and unreliable - we don't + * implement it. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + */ +public class PipedInputStream extends InputStream +{ + /** PipedOutputStream to which this is connected. Null only if this + * InputStream hasn't been connected yet. */ + PipedOutputStream source; + + /** Set to true if close() has been called on this InputStream. */ + boolean closed; + + + /** + * The size of the internal buffer used for input/output. + */ + /* The "Constant Field Values" Javadoc of the Sun J2SE 1.4 + * specifies 1024. + */ + protected static final int PIPE_SIZE = 1024; + + + /** + * This is the internal circular buffer used for storing bytes written + * to the pipe and from which bytes are read by this stream + */ + protected byte[] buffer = null; + + /** + * The index into buffer where the next byte from the connected + * PipedOutputStream will be written. If this variable is + * equal to out, then the buffer is full. If set to < 0, + * the buffer is empty. + */ + protected int in = -1; + + /** + * This index into the buffer where bytes will be read from. + */ + protected int out = 0; + + /** Buffer used to implement single-argument read/receive */ + private byte[] read_buf = new byte[1]; + + /** + * Creates a new PipedInputStream that is not connected to a + * PipedOutputStream. It must be connected before bytes can + * be read from this stream. + */ + public PipedInputStream() + { + this(PIPE_SIZE); + } + + /** + * Creates a new PipedInputStream of the given size that is not + * connected to a PipedOutputStream. + * It must be connected before bytes can be read from this stream. + * + * @since 1.6 + * @since IllegalArgumentException If pipeSize <= 0. + */ + public PipedInputStream(int pipeSize) throws IllegalArgumentException + { + if (pipeSize <= 0) + throw new IllegalArgumentException("pipeSize must be > 0"); + + this.buffer = new byte[pipeSize]; + } + + /** + * This constructor creates a new PipedInputStream and connects + * it to the passed in PipedOutputStream. The stream is then + * ready for reading. + * + * @param source The PipedOutputStream to connect this + * stream to + * + * @exception IOException If source is already connected. + */ + public PipedInputStream(PipedOutputStream source) throws IOException + { + this(); + connect(source); + } + + /** + * This constructor creates a new PipedInputStream of the given + * size and connects it to the passed in PipedOutputStream. + * The stream is then ready for reading. + * + * @param source The PipedOutputStream to connect this + * stream to + * + * @since 1.6 + * @exception IOException If source is already connected. + */ + public PipedInputStream(PipedOutputStream source, int pipeSize) + throws IOException + { + this(pipeSize); + connect(source); + } + + /** + * This method connects this stream to the passed in + * PipedOutputStream. + * This stream is then ready for reading. If this stream is already + * connected or has been previously closed, then an exception is thrown + * + * @param source The PipedOutputStream to connect this stream to + * + * @exception IOException If this PipedInputStream or source + * has been connected already. + */ + public void connect(PipedOutputStream source) throws IOException + { + // The JDK (1.3) does not appear to check for a previously closed + // connection here. + + if (this.source != null || source.sink != null) + throw new IOException ("Already connected"); + + source.sink = this; + this.source = source; + } + + /** + * This method receives a byte of input from the source PipedOutputStream. + * If the internal circular buffer is full, this method blocks. + * + * @param val The byte to write to this stream + * + * @exception IOException if error occurs + * @specnote Weird. This method must be some sort of accident. + */ + protected synchronized void receive(int val) throws IOException + { + read_buf[0] = (byte) (val & 0xff); + receive (read_buf, 0, 1); + } + + /** + * This method is used by the connected PipedOutputStream to + * write bytes into the buffer. + * + * @param buf The array containing bytes to write to this stream + * @param offset The offset into the array to start writing from + * @param len The number of bytes to write. + * + * @exception IOException If an error occurs + * @specnote This code should be in PipedOutputStream.write, but we + * put it here in order to support that bizarre recieve(int) + * method. + */ + synchronized void receive(byte[] buf, int offset, int len) + throws IOException + { + if (closed) + throw new IOException ("Pipe closed"); + + int bufpos = offset; + int copylen; + + while (len > 0) + { + try + { + while (in == out) + { + // The pipe is full. Wake up any readers and wait for them. + notifyAll(); + wait(); + // The pipe could have been closed while we were waiting. + if (closed) + throw new IOException ("Pipe closed"); + } + } + catch (InterruptedException ix) + { + throw new InterruptedIOException (); + } + + if (in < 0) // The pipe is empty. + in = 0; + + // Figure out how many bytes from buf can be copied without + // overrunning out or going past the length of the buffer. + if (in < out) + copylen = Math.min (len, out - in); + else + copylen = Math.min (len, buffer.length - in); + + // Copy bytes until the pipe is filled, wrapping if necessary. + System.arraycopy(buf, bufpos, buffer, in, copylen); + len -= copylen; + bufpos += copylen; + in += copylen; + if (in == buffer.length) + in = 0; + } + // Notify readers that new data is in the pipe. + notifyAll(); + } + + /** + * This method reads one byte from the stream. + * -1 is returned to indicated that no bytes can be read + * because the end of the stream was reached. If the stream is already + * closed, a -1 will again be returned to indicate the end of the stream. + * + *

This method will block if no byte is available to be read.

+ * + * @return the value of the read byte value, or -1 of the end of the stream + * was reached + * + * @throws IOException if an error occured + */ + public int read() throws IOException + { + // Method operates by calling the multibyte overloaded read method + // Note that read_buf is an internal instance variable. I allocate it + // there to avoid constant reallocation overhead for applications that + // call this method in a loop at the cost of some unneeded overhead + // if this method is never called. + + int r = read(read_buf, 0, 1); + return r != -1 ? (read_buf[0] & 0xff) : -1; + } + + /** + * This method reads bytes from the stream into a caller supplied buffer. + * It starts storing bytes at position offset into the + * buffer and + * reads a maximum of len bytes. Note that this method + * can actually + * read fewer than len bytes. The actual number of bytes + * read is + * returned. A -1 is returned to indicated that no bytes can be read + * because the end of the stream was reached - ie close() was called on the + * connected PipedOutputStream. + *

+ * This method will block if no bytes are available to be read. + * + * @param buf The buffer into which bytes will be stored + * @param offset The index into the buffer at which to start writing. + * @param len The maximum number of bytes to read. + * + * @exception IOException If close() was called on this Piped + * InputStream. + */ + public synchronized int read(byte[] buf, int offset, int len) + throws IOException + { + if (source == null) + throw new IOException ("Not connected"); + if (closed) + throw new IOException ("Pipe closed"); + + // Don't block if nothing was requested. + if (len == 0) + return 0; + + // If the buffer is empty, wait until there is something in the pipe + // to read. + try + { + while (in < 0) + { + if (source.closed) + return -1; + wait(); + } + } + catch (InterruptedException ix) + { + throw new InterruptedIOException(); + } + + int total = 0; + int copylen; + + while (true) + { + // Figure out how many bytes from the pipe can be copied without + // overrunning in or going past the length of buf. + if (out < in) + copylen = Math.min (len, in - out); + else + copylen = Math.min (len, buffer.length - out); + + System.arraycopy (buffer, out, buf, offset, copylen); + offset += copylen; + len -= copylen; + out += copylen; + total += copylen; + + if (out == buffer.length) + out = 0; + + if (out == in) + { + // Pipe is now empty. + in = -1; + out = 0; + } + + // If output buffer is filled or the pipe is empty, we're done. + if (len == 0 || in == -1) + { + // Notify any waiting outputstream that there is now space + // to write. + notifyAll(); + return total; + } + } + } + + /** + * This method returns the number of bytes that can be read from this stream + * before blocking could occur. This is the number of bytes that are + * currently unread in the internal circular buffer. Note that once this + * many additional bytes are read, the stream may block on a subsequent + * read, but it not guaranteed to block. + * + * @return The number of bytes that can be read before blocking might occur + * + * @exception IOException If an error occurs + */ + public synchronized int available() throws IOException + { + // The JDK 1.3 implementation does not appear to check for the closed or + // unconnected stream conditions here. + + if (in < 0) + return 0; + else if (out < in) + return in - out; + else + return (buffer.length - out) + in; + } + + /** + * This methods closes the stream so that no more data can be read + * from it. + * + * @exception IOException If an error occurs + */ + public synchronized void close() throws IOException + { + closed = true; + // Wake any thread which may be in receive() waiting to write data. + notifyAll(); + } +} diff --git a/libjava/classpath/java/io/PipedOutputStream.java b/libjava/classpath/java/io/PipedOutputStream.java new file mode 100644 index 000000000..839cb1e22 --- /dev/null +++ b/libjava/classpath/java/io/PipedOutputStream.java @@ -0,0 +1,181 @@ +/* PipedOutputStream.java -- Write portion of piped streams. + Copyright (C) 1998, 2000, 2001, 2003 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +// NOTE: This implementation is very similar to that of PipedWriter. If you +// fix a bug in here, chances are you should make a similar change to the +// PipedWriter code. + +/** + * This class writes its bytes to a PipedInputStream to + * which it is connected. + *

+ * It is highly recommended that a PipedOutputStream and its + * connected PipedInputStream be in different threads. If + * they are in the same thread, read and write operations could deadlock + * the thread. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + */ +public class PipedOutputStream extends OutputStream +{ + /** Target PipedInputStream to which this is connected. Null only if this + * OutputStream hasn't been connected yet. */ + PipedInputStream sink; + + /** Set to true if close() has been called on this OutputStream. */ + boolean closed; + + /** + * Create an unconnected PipedOutputStream. It must be connected + * to a PipedInputStream using the connect + * method prior to writing any data or an exception will be thrown. + */ + public PipedOutputStream() + { + } + + /** + * Create a new PipedOutputStream instance + * to write to the specified PipedInputStream. This stream + * is then ready for writing. + * + * @param sink The PipedInputStream to connect this stream to. + * + * @exception IOException If sink has already been connected + * to a different PipedOutputStream. + */ + public PipedOutputStream(PipedInputStream sink) throws IOException + { + sink.connect(this); + } + + /** + * Connects this object to the specified PipedInputStream + * object. This stream will then be ready for writing. + * + * @param sink The PipedInputStream to connect this stream to + * + * @exception IOException If the stream has not been connected or has + * been closed. + */ + public void connect(PipedInputStream sink) throws IOException + { + if (this.sink != null || sink.source != null) + throw new IOException ("Already connected"); + sink.connect(this); + } + + /** + * Write a single byte of date to the stream. Note that this method will + * block if the PipedInputStream to which this object is + * connected has a full buffer. + * + * @param b The byte of data to be written, passed as an int. + * + * @exception IOException If the stream has not been connected or has + * been closed. + */ + public void write(int b) throws IOException + { + if (sink == null) + throw new IOException ("Not connected"); + if (closed) + throw new IOException ("Pipe closed"); + + sink.receive (b); + } + + /** + * This method writes len bytes of data from the byte array + * buf starting at index offset in the array + * to the stream. Note that this method will block if the + * PipedInputStream to which this object is connected has + * a buffer that cannot hold all of the bytes to be written. + * + * @param buffer The array containing bytes to write to the stream. + * @param offset The index into the array to start writing bytes from. + * @param len The number of bytes to write. + * + * @exception IOException If the stream has not been connected or has + * been closed. + */ + public void write(byte[] buffer, int offset, int len) throws IOException + { + if (sink == null) + throw new IOException ("Not connected"); + if (closed) + throw new IOException ("Pipe closed"); + + sink.receive(buffer, offset, len); + } + + /** + * This method does nothing. + * + * @exception IOException If the stream is closed. + * @specnote You'd think that this method would block until the sink + * had read all available data. Thats not the case - this method + * appears to be a no-op? + */ + public void flush() throws IOException + { + } + + /** + * This method closes this stream so that no more data can be written + * to it. Any further attempts to write to this stream may throw an + * exception + * + * @exception IOException If an error occurs + */ + public void close() throws IOException + { + // A close call on an unconnected PipedOutputStream has no effect. + if (sink != null) + { + closed = true; + // Notify any waiting readers that the stream is now closed. + synchronized (sink) + { + sink.notifyAll(); + } + } + } +} diff --git a/libjava/classpath/java/io/PipedReader.java b/libjava/classpath/java/io/PipedReader.java new file mode 100644 index 000000000..4f449ffce --- /dev/null +++ b/libjava/classpath/java/io/PipedReader.java @@ -0,0 +1,364 @@ +/* PipedReader.java -- Read portion of piped character streams. + Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package java.io; + +// NOTE: This implementation is very similar to that of PipedInputStream. +// If you fix a bug in here, chances are you should make a similar change to +// the PipedInputStream code. + +/** + * An input stream that reads characters from a piped writer to which it is + * connected. + *

+ * Data is read and written to an internal buffer. It is highly recommended + * that the PipedReader and connected PipedWriter + * be part of different threads. If they are not, there is a possibility + * that the read and write operations could deadlock their thread. + * + * @specnote The JDK implementation appears to have some undocumented + * functionality where it keeps track of what thread is writing + * to pipe and throws an IOException if that thread susequently + * dies. This behaviour seems dubious and unreliable - we don't + * implement it. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + */ +public class PipedReader extends Reader +{ + /** PipedWriter to which this is connected. Null only if this + * Reader hasn't been connected yet. */ + PipedWriter source; + + /** Set to true if close() has been called on this Reader. */ + boolean closed; + + /** + * The size of the internal buffer used for input/output. + */ + static final int PIPE_SIZE = 2048; + + /** + * This is the internal circular buffer used for storing chars written + * to the pipe and from which chars are read by this stream + */ + char[] buffer = new char[PIPE_SIZE]; + + /** + * The index into buffer where the next char from the connected + * PipedWriter will be written. If this variable is + * equal to out, then the buffer is full. If set to < 0, + * the buffer is empty. + */ + int in = -1; + + /** + * This index into the buffer where chars will be read from. + */ + int out = 0; + + /** Buffer used to implement single-argument read/receive */ + char[] read_buf = new char[1]; + + /** + * Creates a new PipedReader that is not connected to a + * PipedWriter. It must be connected before chars can + * be read from this stream. + */ + public PipedReader() + { + } + + /** + * This constructor creates a new PipedReader and connects + * it to the passed in PipedWriter. The stream is then + * ready for reading. + * + * @param source The PipedWriter to connect this stream to + * + * @exception IOException If source is already connected. + */ + public PipedReader(PipedWriter source) throws IOException + { + connect(source); + } + + /** + * This method connects this stream to the passed in + * PipedWriter. + * This stream is then ready for reading. If this stream is already + * connected or has been previously closed, then an exception is thrown + * + * @param source The PipedWriter to connect this stream to + * + * @exception IOException If this PipedReader or source + * has been connected already. + */ + public void connect(PipedWriter source) throws IOException + { + // The JDK (1.3) does not appear to check for a previously closed + // connection here. + + if (this.source != null || source.sink != null) + throw new IOException ("Already connected"); + + source.sink = this; + this.source = source; + } + + /** + * This method is used by the connected PipedWriter to + * write chars into the buffer. + * + * @param buf The array containing chars to write to this stream + * @param offset The offset into the array to start writing from + * @param len The number of chars to write. + * + * @exception IOException If an error occurs + * @specnote This code should be in PipedWriter.write, but we + * put it here in order to support that bizarre recieve(int) + * method. + */ + void receive(char[] buf, int offset, int len) + throws IOException + { + synchronized (lock) + { + if (closed) + throw new IOException ("Pipe closed"); + + int bufpos = offset; + int copylen; + + while (len > 0) + { + try + { + while (in == out) + { + // The pipe is full. Wake up any readers and wait for them. + lock.notifyAll(); + lock.wait(); + // The pipe could have been closed while we were waiting. + if (closed) + throw new IOException ("Pipe closed"); + } + } + catch (InterruptedException ix) + { + throw new InterruptedIOException (); + } + + if (in < 0) // The pipe is empty. + in = 0; + + // Figure out how many chars from buf can be copied without + // overrunning out or going past the length of the buffer. + if (in < out) + copylen = Math.min (len, out - in); + else + copylen = Math.min (len, buffer.length - in); + + // Copy chars until the pipe is filled, wrapping if necessary. + System.arraycopy(buf, bufpos, buffer, in, copylen); + len -= copylen; + bufpos += copylen; + in += copylen; + if (in == buffer.length) + in = 0; + } + // Notify readers that new data is in the pipe. + lock.notifyAll(); + } + } + + /** + * This method reads chars from the stream into a caller supplied buffer. + * It starts storing chars at position offset into the + * buffer and + * reads a maximum of len chars. Note that this method + * can actually + * read fewer than len chars. The actual number of chars + * read is + * returned. A -1 is returned to indicated that no chars can be read + * because the end of the stream was reached. If the stream is already + * closed, a -1 will again be returned to indicate the end of the stream. + *

+ * This method will block if no char is available to be read. + */ + public int read() throws IOException + { + // Method operates by calling the multichar overloaded read method + // Note that read_buf is an internal instance variable. I allocate it + // there to avoid constant reallocation overhead for applications that + // call this method in a loop at the cost of some unneeded overhead + // if this method is never called. + + int r = read(read_buf, 0, 1); + return r != -1 ? read_buf[0] : -1; + } + + /** + * This method reads characters from the stream into a caller supplied + * buffer. It starts storing chars at position offset into + * the buffer and reads a maximum of len chars. Note that + * this method can actually read fewer than len chars. + * The actual number of chars read is + * returned. A -1 is returned to indicated that no chars can be read + * because the end of the stream was reached - ie close() was called on the + * connected PipedWriter. + *

+ * This method will block if no chars are available to be read. + * + * @param buf The buffer into which chars will be stored + * @param offset The index into the buffer at which to start writing. + * @param len The maximum number of chars to read. + * + * @exception IOException If close() was called on this Piped + * Reader. + */ + public int read(char[] buf, int offset, int len) + throws IOException + { + synchronized (lock) + { + if (source == null) + throw new IOException ("Not connected"); + if (closed) + throw new IOException ("Pipe closed"); + + // Don't block if nothing was requested. + if (len == 0) + return 0; + + // If the buffer is empty, wait until there is something in the pipe + // to read. + try + { + while (in < 0) + { + if (source.closed) + return -1; + lock.wait(); + } + } + catch (InterruptedException ix) + { + throw new InterruptedIOException(); + } + + int total = 0; + int copylen; + + while (true) + { + // Figure out how many chars from the pipe can be copied without + // overrunning in or going past the length of buf. + if (out < in) + copylen = Math.min (len, in - out); + else + copylen = Math.min (len, buffer.length - out); + + System.arraycopy (buffer, out, buf, offset, copylen); + offset += copylen; + len -= copylen; + out += copylen; + total += copylen; + + if (out == buffer.length) + out = 0; + + if (out == in) + { + // Pipe is now empty. + in = -1; + out = 0; + } + + // If output buffer is filled or the pipe is empty, we're done. + if (len == 0 || in == -1) + { + // Notify any waiting Writer that there is now space + // to write. + lock.notifyAll(); + return total; + } + } + } + } + + public boolean ready() throws IOException + { + // The JDK 1.3 implementation does not appear to check for the closed or + // unconnected stream conditions here. However, checking for a + // closed stream is explicitly required by the JDK 1.2 and 1.3 + // documentation (for Reader.close()), so we do it. + + synchronized (lock) + { + if (closed) + throw new IOException("Pipe closed"); + + if (in < 0) + return false; + + int count; + if (out < in) + count = in - out; + else + count = (buffer.length - out) - in; + + return (count > 0); + } + } + + /** + * This methods closes the stream so that no more data can be read + * from it. + * + * @exception IOException If an error occurs + */ + public void close() throws IOException + { + synchronized (lock) + { + closed = true; + // Wake any thread which may be in receive() waiting to write data. + lock.notifyAll(); + } + } +} diff --git a/libjava/classpath/java/io/PipedWriter.java b/libjava/classpath/java/io/PipedWriter.java new file mode 100644 index 000000000..0d48ab0e4 --- /dev/null +++ b/libjava/classpath/java/io/PipedWriter.java @@ -0,0 +1,182 @@ +/* PipedWriter.java -- Write portion of piped character streams. + Copyright (C) 1998, 2000, 2001, 2003 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +// NOTE: This implementation is very similar to that of PipedOutputStream. +// If you fix a bug in here, chances are you should make a similar change to +// the PipedOutputStream code. + +/** + * This class writes its chars to a PipedReader to + * which it is connected. + *

+ * It is highly recommended that a PipedWriter and its + * connected PipedReader be in different threads. If + * they are in the same thread, read and write operations could deadlock + * the thread. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + */ +public class PipedWriter extends Writer +{ + /** Target PipedReader to which this is connected. Null only if this + * Writer hasn't been connected yet. */ + PipedReader sink; + + /** Set to true if close() has been called on this Writer. */ + boolean closed; + + /** Buffer used to implement single-argument write */ + char[] read_buf = new char[1]; + + /** + * Create an unconnected PipedWriter. It must be connected + * to a PipedReader using the connect + * method prior to writing any data or an exception will be thrown. + */ + public PipedWriter() + { + } + + /** + * Create a new PipedWriter instance + * to write to the specified PipedReader. This stream + * is then ready for writing. + * + * @param sink The PipedReader to connect this stream to. + * + * @exception IOException If sink has already been connected + * to a different PipedWriter. + */ + public PipedWriter(PipedReader sink) throws IOException + { + sink.connect(this); + } + + /** + * Connects this object to the specified PipedReader + * object. This stream will then be ready for writing. + * + * @param sink The PipedReader to connect this stream to + * + * @exception IOException If the stream has not been connected or has + * been closed. + */ + public void connect(PipedReader sink) throws IOException + { + if (this.sink != null || sink.source != null) + throw new IOException ("Already connected"); + sink.connect(this); + } + + /** + * Write a single char of date to the stream. Note that this method will + * block if the PipedReader to which this object is + * connected has a full buffer. + * + * @param b The char of data to be written, passed as an int. + * + * @exception IOException If the stream has not been connected or has + * been closed. + */ + public void write(int b) throws IOException + { + read_buf[0] = (char) (b & 0xffff); + sink.receive (read_buf, 0, 1); + } + + /** + * This method writes len chars of data from the char array + * buf starting at index offset in the array + * to the stream. Note that this method will block if the + * PipedReader to which this object is connected has + * a buffer that cannot hold all of the chars to be written. + * + * @param buffer The array containing chars to write to the stream. + * @param offset The index into the array to start writing chars from. + * @param len The number of chars to write. + * + * @exception IOException If the stream has not been connected or has + * been closed. + */ + public void write(char[] buffer, int offset, int len) throws IOException + { + if (sink == null) + throw new IOException ("Not connected"); + if (closed) + throw new IOException ("Pipe closed"); + + sink.receive(buffer, offset, len); + } + + /** + * This method does nothing. + * + * @exception IOException If the stream is closed. + * @specnote You'd think that this method would block until the sink + * had read all available data. Thats not the case - this method + * appears to be a no-op? + */ + public void flush() throws IOException + { + if (closed) + throw new IOException ("Pipe closed"); + } + + /** + * This method closes this stream so that no more data can be written + * to it. Any further attempts to write to this stream may throw an + * exception + * + * @exception IOException If an error occurs + */ + public void close() throws IOException + { + // A close call on an unconnected PipedWriter has no effect. + if (sink != null) + { + closed = true; + // Notify any waiting readers that the stream is now closed. + synchronized (sink) + { + sink.notifyAll(); + } + } + } +} diff --git a/libjava/classpath/java/io/PrintStream.java b/libjava/classpath/java/io/PrintStream.java new file mode 100644 index 000000000..eaab7c3d4 --- /dev/null +++ b/libjava/classpath/java/io/PrintStream.java @@ -0,0 +1,675 @@ +/* PrintStream.java -- OutputStream for printing output + Copyright (C) 1998, 1999, 2001, 2003, 2004, 2005, 2006 + Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +import java.util.Locale; +import java.util.Formatter; + +import gnu.classpath.SystemProperties; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * Status: Believed complete and correct to 1.3 + */ + +/** + * This class prints Java primitive values and object to a stream as + * text. None of the methods in this class throw an exception. However, + * errors can be detected by calling the checkError() method. + * Additionally, this stream can be designated as "autoflush" when + * created so that any writes are automatically flushed to the underlying + * output sink when the current line is terminated. + *

+ * This class converts char's into byte's using the system default encoding. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + */ +public class PrintStream extends FilterOutputStream implements Appendable +{ + /* Notice the implementation is quite similar to OutputStreamWriter. + * This leads to some minor duplication, because neither inherits + * from the other, and we want to maximize performance. */ + + // Line separator string. + private static final char[] line_separator + = SystemProperties.getProperty("line.separator", "\n").toCharArray(); + + /** + * Encoding name + */ + private final String encoding; + + /** + * This boolean indicates whether or not an error has ever occurred + * on this stream. + */ + private boolean error_occurred = false; + + /** + * This is true if auto-flush is enabled, + * false otherwise + */ + private final boolean auto_flush; + + /** + * This method initializes a new PrintStream object to write + * to the specified output File. Doesn't autoflush. + * + * @param file The File to write to. + * @throws FileNotFoundException if an error occurs while opening the file. + * + * @since 1.5 + */ + public PrintStream (File file) + throws FileNotFoundException + { + this (new FileOutputStream(file), false); + } + + /** + * This method initializes a new PrintStream object to write + * to the specified output File. Doesn't autoflush. + * + * @param file The File to write to. + * @param encoding The name of the character encoding to use for this + * object. + * @throws FileNotFoundException If an error occurs while opening the file. + * @throws UnsupportedEncodingException If the charset specified by + * encoding is invalid. + * + * @since 1.5 + */ + public PrintStream (File file, String encoding) + throws FileNotFoundException,UnsupportedEncodingException + { + this (new FileOutputStream(file), false, encoding); + } + + /** + * This method initializes a new PrintStream object to write + * to the specified output File. Doesn't autoflush. + * + * @param fileName The name of the File to write to. + * @throws FileNotFoundException if an error occurs while opening the file, + * + * @since 1.5 + */ + public PrintStream (String fileName) + throws FileNotFoundException + { + this (new FileOutputStream(new File(fileName)), false); + } + + /** + * This method initializes a new PrintStream object to write + * to the specified output File. Doesn't autoflush. + * + * @param fileName The name of the File to write to. + * @param encoding The name of the character encoding to use for this + * object. + * @throws FileNotFoundException if an error occurs while opening the file. + * @throws UnsupportedEncodingException If the charset specified by + * encoding is invalid. + * + * @since 1.5 + */ + public PrintStream (String fileName, String encoding) + throws FileNotFoundException,UnsupportedEncodingException + { + this (new FileOutputStream(new File(fileName)), false, encoding); + } + + /** + * This method initializes a new PrintStream object to write + * to the specified output sink. Doesn't autoflush. + * + * @param out The OutputStream to write to. + */ + public PrintStream (OutputStream out) + { + this (out, false); + } + + /** + * This method initializes a new PrintStream object to write + * to the specified output sink. This constructor also allows "auto-flush" + * functionality to be specified where the stream will be flushed after + * every print or println call, when the + * write methods with array arguments are called, or when a + * single new-line character is written. + *

+ * + * @param out The OutputStream to write to. + * @param auto_flush true to flush the stream after every + * line, false otherwise + */ + public PrintStream (OutputStream out, boolean auto_flush) + { + super (out); + String encoding; + try { + encoding = SystemProperties.getProperty("file.encoding"); + } catch (SecurityException e){ + encoding = "ISO8859_1"; + } catch (IllegalArgumentException e){ + encoding = "ISO8859_1"; + } catch (NullPointerException e){ + encoding = "ISO8859_1"; + } + this.encoding = encoding; + this.auto_flush = auto_flush; + } + + /** + * This method initializes a new PrintStream object to write + * to the specified output sink. This constructor also allows "auto-flush" + * functionality to be specified where the stream will be flushed after + * every print or println call, when the + * write methods with array arguments are called, or when a + * single new-line character is written. + *

+ * + * @param out The OutputStream to write to. + * @param auto_flush true to flush the stream after every + * line, false otherwise + * @param encoding The name of the character encoding to use for this + * object. + */ + public PrintStream (OutputStream out, boolean auto_flush, String encoding) + throws UnsupportedEncodingException + { + super (out); + + new String(new byte[]{0}, encoding); // check if encoding is supported + this.encoding = encoding; + this.auto_flush = auto_flush; + } + + /** + * This method checks to see if an error has occurred on this stream. Note + * that once an error has occurred, this method will continue to report + * true forever for this stream. Before checking for an + * error condition, this method flushes the stream. + * + * @return true if an error has occurred, + * false otherwise + */ + public boolean checkError () + { + flush (); + return error_occurred; + } + + /** + * This method can be called by subclasses to indicate that an error + * has occurred and should be reported by checkError. + */ + protected void setError () + { + error_occurred = true; + } + + /** + * This method closes this stream and all underlying streams. + */ + public void close () + { + try + { + flush(); + out.close(); + } + catch (InterruptedIOException iioe) + { + Thread.currentThread().interrupt(); + } + catch (IOException e) + { + setError (); + } + } + + /** + * This method flushes any buffered bytes to the underlying stream and + * then flushes that stream as well. + */ + public void flush () + { + try + { + out.flush(); + } + catch (InterruptedIOException iioe) + { + Thread.currentThread().interrupt(); + } + catch (IOException e) + { + setError (); + } + } + + private synchronized void print (String str, boolean println) + { + try + { + writeChars(str, 0, str.length()); + if (println) + writeChars(line_separator, 0, line_separator.length); + if (auto_flush) + flush(); + } + catch (InterruptedIOException iioe) + { + Thread.currentThread().interrupt(); + } + catch (IOException e) + { + setError (); + } + } + + private synchronized void print (char[] chars, int pos, int len, + boolean println) + { + try + { + writeChars(chars, pos, len); + if (println) + writeChars(line_separator, 0, line_separator.length); + if (auto_flush) + flush(); + } + catch (InterruptedIOException iioe) + { + Thread.currentThread().interrupt(); + } + catch (IOException e) + { + setError (); + } + } + + private void writeChars(char[] buf, int offset, int count) + throws IOException + { + byte[] bytes = (new String(buf, offset, count)).getBytes(encoding); + out.write(bytes, 0, bytes.length); + } + + private void writeChars(String str, int offset, int count) + throws IOException + { + byte[] bytes = str.substring(offset, offset+count).getBytes(encoding); + out.write(bytes, 0, bytes.length); + } + + /** + * This methods prints a boolean value to the stream. true + * values are printed as "true" and false values are printed + * as "false". + * + * @param bool The boolean value to print + */ + public void print (boolean bool) + { + print(String.valueOf(bool), false); + } + + /** + * This method prints an integer to the stream. The value printed is + * determined using the String.valueOf() method. + * + * @param inum The int value to be printed + */ + public void print (int inum) + { + print(String.valueOf(inum), false); + } + + /** + * This method prints a long to the stream. The value printed is + * determined using the String.valueOf() method. + * + * @param lnum The long value to be printed + */ + public void print (long lnum) + { + print(String.valueOf(lnum), false); + } + + /** + * This method prints a float to the stream. The value printed is + * determined using the String.valueOf() method. + * + * @param fnum The float value to be printed + */ + public void print (float fnum) + { + print(String.valueOf(fnum), false); + } + + /** + * This method prints a double to the stream. The value printed is + * determined using the String.valueOf() method. + * + * @param dnum The double value to be printed + */ + public void print (double dnum) + { + print(String.valueOf(dnum), false); + } + + /** + * This method prints an Object to the stream. The actual + * value printed is determined by calling the String.valueOf() + * method. + * + * @param obj The Object to print. + */ + public void print (Object obj) + { + print(obj == null ? "null" : obj.toString(), false); + } + + /** + * This method prints a String to the stream. The actual + * value printed depends on the system default encoding. + * + * @param str The String to print. + */ + public void print (String str) + { + print(str == null ? "null" : str, false); + } + + /** + * This method prints a char to the stream. The actual value printed is + * determined by the character encoding in use. + * + * @param ch The char value to be printed + */ + public synchronized void print (char ch) + { + print(new char[]{ch}, 0, 1, false); + } + + /** + * This method prints an array of characters to the stream. The actual + * value printed depends on the system default encoding. + * + * @param charArray The array of characters to print. + */ + public void print (char[] charArray) + { + print(charArray, 0, charArray.length, false); + } + + /** + * This method prints a line separator sequence to the stream. The value + * printed is determined by the system property

line.separator + * and is not necessarily the Unix '\n' newline character. + */ + public void println () + { + print(line_separator, 0, line_separator.length, false); + } + + /** + * This methods prints a boolean value to the stream. true + * values are printed as "true" and false values are printed + * as "false". + *

+ * This method prints a line termination sequence after printing the value. + * + * @param bool The boolean value to print + */ + public void println (boolean bool) + { + print(String.valueOf(bool), true); + } + + /** + * This method prints an integer to the stream. The value printed is + * determined using the String.valueOf() method. + *

+ * This method prints a line termination sequence after printing the value. + * + * @param inum The int value to be printed + */ + public void println (int inum) + { + print(String.valueOf(inum), true); + } + + /** + * This method prints a long to the stream. The value printed is + * determined using the String.valueOf() method. + *

+ * This method prints a line termination sequence after printing the value. + * + * @param lnum The long value to be printed + */ + public void println (long lnum) + { + print(String.valueOf(lnum), true); + } + + /** + * This method prints a float to the stream. The value printed is + * determined using the String.valueOf() method. + *

+ * This method prints a line termination sequence after printing the value. + * + * @param fnum The float value to be printed + */ + public void println (float fnum) + { + print(String.valueOf(fnum), true); + } + + /** + * This method prints a double to the stream. The value printed is + * determined using the String.valueOf() method. + *

+ * This method prints a line termination sequence after printing the value. + * + * @param dnum The double value to be printed + */ + public void println (double dnum) + { + print(String.valueOf(dnum), true); + } + + /** + * This method prints an Object to the stream. The actual + * value printed is determined by calling the String.valueOf() + * method. + *

+ * This method prints a line termination sequence after printing the value. + * + * @param obj The Object to print. + */ + public void println (Object obj) + { + print(obj == null ? "null" : obj.toString(), true); + } + + /** + * This method prints a String to the stream. The actual + * value printed depends on the system default encoding. + *

+ * This method prints a line termination sequence after printing the value. + * + * @param str The String to print. + */ + public void println (String str) + { + print (str == null ? "null" : str, true); + } + + /** + * This method prints a char to the stream. The actual value printed is + * determined by the character encoding in use. + *

+ * This method prints a line termination sequence after printing the value. + * + * @param ch The char value to be printed + */ + public synchronized void println (char ch) + { + print(new char[]{ch}, 0, 1, true); + } + + /** + * This method prints an array of characters to the stream. The actual + * value printed depends on the system default encoding. + *

+ * This method prints a line termination sequence after printing the value. + * + * @param charArray The array of characters to print. + */ + public void println (char[] charArray) + { + print(charArray, 0, charArray.length, true); + } + + /** + * This method writes a byte of data to the stream. If auto-flush is + * enabled, printing a newline character will cause the stream to be + * flushed after the character is written. + * + * @param oneByte The byte to be written + */ + public void write (int oneByte) + { + try + { + out.write (oneByte & 0xff); + + if (auto_flush && (oneByte == '\n')) + flush (); + } + catch (InterruptedIOException iioe) + { + Thread.currentThread ().interrupt (); + } + catch (IOException e) + { + setError (); + } + } + + /** + * This method writes len bytes from the specified array + * starting at index offset into the array. + * + * @param buffer The array of bytes to write + * @param offset The index into the array to start writing from + * @param len The number of bytes to write + */ + public void write (byte[] buffer, int offset, int len) + { + try + { + out.write (buffer, offset, len); + + if (auto_flush) + flush (); + } + catch (InterruptedIOException iioe) + { + Thread.currentThread ().interrupt (); + } + catch (IOException e) + { + setError (); + } + } + + /** @since 1.5 */ + public PrintStream append(char c) + { + print(c); + return this; + } + + /** @since 1.5 */ + public PrintStream append(CharSequence cs) + { + print(cs == null ? "null" : cs.toString()); + return this; + } + + /** @since 1.5 */ + public PrintStream append(CharSequence cs, int start, int end) + { + print(cs == null ? "null" : cs.subSequence(start, end).toString()); + return this; + } + + /** @since 1.5 */ + public PrintStream printf(String format, Object... args) + { + return format(format, args); + } + + /** @since 1.5 */ + public PrintStream printf(Locale locale, String format, Object... args) + { + return format(locale, format, args); + } + + /** @since 1.5 */ + public PrintStream format(String format, Object... args) + { + return format(Locale.getDefault(), format, args); + } + + /** @since 1.5 */ + public PrintStream format(Locale locale, String format, Object... args) + { + Formatter f = new Formatter(this, locale); + f.format(format, args); + return this; + } +} // class PrintStream diff --git a/libjava/classpath/java/io/PrintWriter.java b/libjava/classpath/java/io/PrintWriter.java new file mode 100644 index 000000000..a67a7f8aa --- /dev/null +++ b/libjava/classpath/java/io/PrintWriter.java @@ -0,0 +1,689 @@ +/* PrintWriter.java -- prints primitive values and objects to a stream as text + Copyright (C) 1998, 1999, 2000, 2001, 2005 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package java.io; + +import java.util.Locale; +import java.util.Formatter; + +/* Written using "Java Class Libraries", 2nd edition, plus online + * API docs for JDK 1.2 beta from http://www.javasoft.com. + * Status: Believed complete and correct. + * However, should use native methods for conversion. + */ + +/** + * This class prints Java primitive values and objects to a stream as + * text. None of the methods in this class throw an exception. However, + * errors can be detected by calling the checkError() method. + * Additionally, this stream can be designated as "autoflush" when + * created so that any writes are automatically flushed to the underlying + * output sink whenever one of the println methods is + * called. (Note that this differs from the PrintStream + * class which also auto-flushes when it encounters a newline character + * in the chars written). + * + * @author Per Bothner (bothner@cygnus.com) + * @author Aaron M. Renn (arenn@urbanophile.com) + * @date April 17, 1998. + */ +public class PrintWriter extends Writer +{ + /** + * true if auto-flush is enabled, false otherwise + */ + private boolean autoflush; + + /** + * This boolean indicates whether or not an error has ever occurred + * on this stream. + */ + private boolean error; + + /** + * Indicates whether or not the stream has been closed. + */ + private boolean closed; + + /** + * This is the underlying Writer we are sending output + * to + */ + protected Writer out; + + /** + * This method intializes a new PrintWriter object to write + * to the specified output sink. The form of the constructor does not + * enable auto-flush functionality. + * + * @param wr The Writer to write to. + */ + public PrintWriter(Writer wr) + { + super(wr.lock); + this.out = wr; + } + + /** + * This method intializes a new PrintWriter object to write + * to the specified output sink. This constructor also allows "auto-flush" + * functionality to be specified where the stream will be flushed after + * every line is terminated or newline character is written. + * + * @param wr The Writer to write to. + * @param autoflush true to flush the stream after every + * line, false otherwise + */ + public PrintWriter(Writer wr, boolean autoflush) + { + super(wr.lock); + this.out = wr; + this.autoflush = autoflush; + } + + /** + * This method initializes a new PrintWriter object to write + * to the specified OutputStream. Characters will be converted + * to chars using the system default encoding. Auto-flush functionality + * will not be enabled. + * + * @param out The OutputStream to write to + */ + public PrintWriter(OutputStream out) + { + super(); + this.out = new OutputStreamWriter(out); + this.lock = this.out; + } + + /** + * This method initializes a new PrintWriter object to write + * to the specified OutputStream. Characters will be converted + * to chars using the system default encoding. This form of the + * constructor allows auto-flush functionality to be enabled if desired + * + * @param out The OutputStream to write to + * @param autoflush true to flush the stream after every + * println call, false otherwise. + */ + public PrintWriter(OutputStream out, boolean autoflush) + { + this(out); + this.autoflush = autoflush; + } + + /** + * This initializes a new PrintWriter object to write to the specified + * file. It creates a FileOutputStream object and wraps it in an + * OutputStreamWriter using the default encoding. + * @param file name of the file to write to + * @throws FileNotFoundException if the file cannot be written or created + * + * @since 1.5 + */ + public PrintWriter(String file) throws FileNotFoundException + { + this(new FileOutputStream(file)); + } + + /** + * This initializes a new PrintWriter object to write to the specified + * file. It creates a FileOutputStream object and wraps it in an + * OutputStreamWriter using the specified encoding. + * @param file name of the file to write to + * @param enc the encoding to use + * @throws FileNotFoundException if the file cannot be written or created + * @throws UnsupportedEncodingException if the encoding is not supported + * + * @since 1.5 + */ + public PrintWriter(String file, String enc) + throws FileNotFoundException, UnsupportedEncodingException + { + this(new OutputStreamWriter(new FileOutputStream(file), enc)); + } + + /** + * This initializes a new PrintWriter object to write to the specified + * file. It creates a FileOutputStream object and wraps it in an + * OutputStreamWriter using the default encoding. + * @param file the file to write to + * @throws FileNotFoundException if the file cannot be written or created + * + * @since 1.5 + */ + public PrintWriter(File file) throws FileNotFoundException + { + this(new FileOutputStream(file)); + } + + /** + * This initializes a new PrintWriter object to write to the specified + * file. It creates a FileOutputStream object and wraps it in an + * OutputStreamWriter using the specified encoding. + * @param file the file to write to + * @param enc the encoding to use + * @throws FileNotFoundException if the file cannot be written or created + * @throws UnsupportedEncodingException if the encoding is not supported + * + * @since 1.5 + */ + public PrintWriter(File file, String enc) + throws FileNotFoundException, UnsupportedEncodingException + { + this(new OutputStreamWriter(new FileOutputStream(file), enc)); + } + + /** + * This method can be called by subclasses to indicate that an error + * has occurred and should be reported by checkError. + */ + protected void setError() + { + error = true; + } + + /** + * This method checks to see if an error has occurred on this stream. Note + * that once an error has occurred, this method will continue to report + * true forever for this stream. Before checking for an + * error condition, this method flushes the stream. + * + * @return true if an error has occurred, + * false otherwise + */ + public boolean checkError() + { + if (! closed) + flush(); + return error; + } + + /** + * This method flushes any buffered chars to the underlying stream and + * then flushes that stream as well. + */ + public void flush() + { + try + { + out.flush(); + } + catch (IOException ex) + { + error = true; + } + } + + /** + * This method closes this stream and all underlying streams. + */ + public void close() + { + try + { + out.close(); + closed = true; + } + catch (IOException ex) + { + error = true; + } + } + + /** + * This method prints a String to the stream. The actual + * value printed depends on the system default encoding. + * + * @param str The String to print. + */ + public void print(String str) + { + write(str == null ? "null" : str); + } + + /** + * This method prints a char to the stream. The actual value printed is + * determined by the character encoding in use. + * + * @param ch The char value to be printed + */ + public void print(char ch) + { + write((int) ch); + } + + /** + * This method prints an array of characters to the stream. The actual + * value printed depends on the system default encoding. + * + * @param charArray The array of characters to print. + */ + public void print(char[] charArray) + { + write(charArray, 0, charArray.length); + } + + /** + * This methods prints a boolean value to the stream. true + * values are printed as "true" and false values are printed + * as "false". + * + * @param bool The boolean value to print + */ + public void print(boolean bool) + { + // We purposely call write() and not print() here. This preserves + // compatibility with JDK 1.2. + write (bool ? "true" : "false"); + } + + /** + * This method prints an integer to the stream. The value printed is + * determined using the String.valueOf() method. + * + * @param inum The int value to be printed + */ + public void print(int inum) + { + // We purposely call write() and not print() here. This preserves + // compatibility with JDK 1.2. + write(Integer.toString(inum)); + } + + /** + * This method prints a long to the stream. The value printed is + * determined using the String.valueOf() method. + * + * @param lnum The long value to be printed + */ + public void print(long lnum) + { + // We purposely call write() and not print() here. This preserves + // compatibility with JDK 1.2. + write(Long.toString(lnum)); + } + + /** + * This method prints a float to the stream. The value printed is + * determined using the String.valueOf() method. + * + * @param fnum The float value to be printed + */ + public void print(float fnum) + { + // We purposely call write() and not print() here. This preserves + // compatibility with JDK 1.2. + write(Float.toString(fnum)); + } + + /** + * This method prints a double to the stream. The value printed is + * determined using the String.valueOf() method. + * + * @param dnum The double value to be printed + */ + public void print(double dnum) + { + // We purposely call write() and not print() here. This preserves + // compatibility with JDK 1.2. + write(Double.toString(dnum)); + } + + /** + * This method prints an Object to the stream. The actual + * value printed is determined by calling the String.valueOf() + * method. + * + * @param obj The Object to print. + */ + public void print(Object obj) + { + // We purposely call write() and not print() here. This preserves + // compatibility with JDK 1.2. + write(obj == null ? "null" : obj.toString()); + } + + /** + * This is the system dependent line separator + */ + private static final char[] line_separator + = System.getProperty("line.separator", "\n").toCharArray(); + + /** + * This method prints a line separator sequence to the stream. The value + * printed is determined by the system property

line.separator + * and is not necessarily the Unix '\n' newline character. + */ + public void println() + { + synchronized (lock) + { + try + { + write(line_separator, 0, line_separator.length); + if (autoflush) + out.flush(); + } + catch (IOException ex) + { + error = true; + } + } + } + + /** + * This methods prints a boolean value to the stream. true + * values are printed as "true" and false values are printed + * as "false". + * + * This method prints a line termination sequence after printing the value. + * + * @param bool The boolean value to print + */ + public void println(boolean bool) + { + synchronized (lock) + { + print(bool); + println(); + } + } + + /** + * This method prints an integer to the stream. The value printed is + * determined using the String.valueOf() method. + * + * This method prints a line termination sequence after printing the value. + * + * @param inum The int value to be printed + */ + public void println(int inum) + { + synchronized (lock) + { + print(inum); + println(); + } + } + + /** + * This method prints a long to the stream. The value printed is + * determined using the String.valueOf() method. + * + * This method prints a line termination sequence after printing the value. + * + * @param lnum The long value to be printed + */ + public void println(long lnum) + { + synchronized (lock) + { + print(lnum); + println(); + } + } + + /** + * This method prints a float to the stream. The value printed is + * determined using the String.valueOf() method. + * + * This method prints a line termination sequence after printing the value. + * + * @param fnum The float value to be printed + */ + public void println(float fnum) + { + synchronized (lock) + { + print(fnum); + println(); + } + } + + /** + * This method prints a double to the stream. The value printed is + * determined using the String.valueOf() method. + * + * This method prints a line termination sequence after printing the value. + * + * @param dnum The double value to be printed + */ + public void println(double dnum) + { + synchronized (lock) + { + print(dnum); + println(); + } + } + + /** + * This method prints an Object to the stream. The actual + * value printed is determined by calling the String.valueOf() + * method. + * + * This method prints a line termination sequence after printing the value. + * + * @param obj The Object to print. + */ + public void println(Object obj) + { + synchronized (lock) + { + print(obj); + println(); + } + } + + /** + * This method prints a String to the stream. The actual + * value printed depends on the system default encoding. + * + * This method prints a line termination sequence after printing the value. + * + * @param str The String to print. + */ + public void println(String str) + { + synchronized (lock) + { + print(str); + println(); + } + } + + /** + * This method prints a char to the stream. The actual value printed is + * determined by the character encoding in use. + * + * This method prints a line termination sequence after printing the value. + * + * @param ch The char value to be printed + */ + public void println(char ch) + { + synchronized (lock) + { + print(ch); + println(); + } + } + + /** + * This method prints an array of characters to the stream. The actual + * value printed depends on the system default encoding. + * + * This method prints a line termination sequence after printing the value. + * + * @param charArray The array of characters to print. + */ + public void println(char[] charArray) + { + synchronized (lock) + { + print(charArray); + println(); + } + } + + /** + * This method writes a single char to the stream. + * + * @param ch The char to be written, passed as a int + */ + public void write(int ch) + { + try + { + out.write(ch); + } + catch (IOException ex) + { + error = true; + } + } + + /** + * This method writes count chars from the specified array + * starting at index offset into the array. + * + * @param charArray The array of chars to write + * @param offset The index into the array to start writing from + * @param count The number of chars to write + */ + public void write(char[] charArray, int offset, int count) + { + try + { + out.write(charArray, offset, count); + } + catch (IOException ex) + { + error = true; + } + } + + /** + * This method writes count chars from the specified + * String to the output starting at character position + * offset into the String + * + * @param str The String to write chars from + * @param offset The offset into the String to start writing from + * @param count The number of chars to write. + */ + public void write(String str, int offset, int count) + { + try + { + out.write(str, offset, count); + } + catch (IOException ex) + { + error = true; + } + } + + /** + * This method write all the chars in the specified array to the output. + * + * @param charArray The array of characters to write + */ + public void write(char[] charArray) + { + write(charArray, 0, charArray.length); + } + + /** + * This method writes the contents of the specified String + * to the underlying stream. + * + * @param str The String to write + */ + public void write(String str) + { + write(str, 0, str.length()); + } + + /** @since 1.5 */ + public PrintWriter append(char c) + { + write(c); + return this; + } + + /** @since 1.5 */ + public PrintWriter append(CharSequence cs) + { + write(cs == null ? "null" : cs.toString()); + return this; + } + + /** @since 1.5 */ + public PrintWriter append(CharSequence cs, int start, int end) + { + write(cs == null ? "null" : cs.subSequence(start, end).toString()); + return this; + } + + /** @since 1.5 */ + public PrintWriter printf(String format, Object... args) + { + return format(format, args); + } + + /** @since 1.5 */ + public PrintWriter printf(Locale locale, String format, Object... args) + { + return format(locale, format, args); + } + + /** @since 1.5 */ + public PrintWriter format(String format, Object... args) + { + return format(Locale.getDefault(), format, args); + } + + /** @since 1.5 */ + public PrintWriter format(Locale locale, String format, Object... args) + { + Formatter f = new Formatter(this, locale); + f.format(format, args); + return this; + } +} diff --git a/libjava/classpath/java/io/PushbackInputStream.java b/libjava/classpath/java/io/PushbackInputStream.java new file mode 100644 index 000000000..62737870c --- /dev/null +++ b/libjava/classpath/java/io/PushbackInputStream.java @@ -0,0 +1,335 @@ +/* PushbackInputStream.java -- An input stream that can unread bytes + Copyright (C) 1998, 1999, 2001, 2002, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package java.io; + +/** + * This subclass of FilterInputStream provides the ability to + * unread data from a stream. It maintains an internal buffer of unread + * data that is supplied to the next read operation. This is conceptually + * similar to mark/reset functionality, except that in this case the + * position to reset the stream to does not need to be known in advance. + *

+ * The default pushback buffer size one byte, but this can be overridden + * by the creator of the stream. + *

+ * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Warren Levy (warrenl@cygnus.com) + */ +public class PushbackInputStream extends FilterInputStream +{ + /** + * This is the default buffer size + */ + private static final int DEFAULT_BUFFER_SIZE = 1; + + /** + * This is the buffer that is used to store the pushed back data + */ + protected byte[] buf; + + /** + * This is the position in the buffer from which the next byte will be + * read. Bytes are stored in reverse order in the buffer, starting from + * buf[buf.length - 1] to buf[0]. Thus when + * pos is 0 the buffer is full and buf.length when + * it is empty + */ + protected int pos; + + /** + * This method initializes a PushbackInputStream to + * read from the specified subordinate InputStream + * with a default pushback buffer size of 1. + * + * @param in The subordinate stream to read from + */ + public PushbackInputStream(InputStream in) + { + this(in, DEFAULT_BUFFER_SIZE); + } + + /** + * This method initializes a PushbackInputStream to + * read from the specified subordinate InputStream with + * the specified buffer size + * + * @param in The subordinate InputStream to read from + * @param size The pushback buffer size to use + */ + public PushbackInputStream(InputStream in, int size) + { + super(in); + if (size < 0) + throw new IllegalArgumentException(); + buf = new byte[size]; + pos = buf.length; + } + + /** + * This method returns the number of bytes that can be read from this + * stream before a read can block. A return of 0 indicates that blocking + * might (or might not) occur on the very next read attempt. + *

+ * This method will return the number of bytes available from the + * pushback buffer plus the number of bytes available from the + * underlying stream. + * + * @return The number of bytes that can be read before blocking could occur + * + * @exception IOException If an error occurs + */ + public int available() throws IOException + { + try + { + return (buf.length - pos) + super.available(); + } + catch (NullPointerException npe) + { + throw new IOException ("Stream closed"); + } + } + + /** + * This method closes the stream and releases any associated resources. + * + * @exception IOException If an error occurs. + */ + public synchronized void close() throws IOException + { + buf = null; + super.close(); + } + + /** + * This method returns false to indicate that it does + * not support mark/reset functionality. + * + * @return This method returns false to indicate that + * this class does not support mark/reset functionality + */ + public boolean markSupported() + { + return false; + } + + /** + * This method always throws an IOException in this class because + * mark/reset functionality is not supported. + * + * @exception IOException Always thrown for this class + */ + public void reset() throws IOException + { + throw new IOException("Mark not supported in this class"); + } + + /** + * This method reads an unsigned byte from the input stream and returns it + * as an int in the range of 0-255. This method also will return -1 if + * the end of the stream has been reached. The byte returned will be read + * from the pushback buffer, unless the buffer is empty, in which case + * the byte will be read from the underlying stream. + *

+ * This method will block until the byte can be read. + * + * @return The byte read or -1 if end of stream + * + * @exception IOException If an error occurs + */ + public synchronized int read() throws IOException + { + if (pos < buf.length) + return ((int) buf[pos++]) & 0xFF; + + return super.read(); + } + + /** + * This method read bytes from a stream and stores them into a + * caller supplied buffer. It starts storing the data at index + * offset into the buffer and attempts to read + * len bytes. This method can return before reading the + * number of bytes requested. The actual number of bytes read is + * returned as an int. A -1 is returned to indicate the end of the + * stream. + *

+ * This method will block until some data can be read. + *

+ * This method first reads bytes from the pushback buffer in order to + * satisfy the read request. If the pushback buffer cannot provide all + * of the bytes requested, the remaining bytes are read from the + * underlying stream. + * + * @param b The array into which the bytes read should be stored + * @param off The offset into the array to start storing bytes + * @param len The requested number of bytes to read + * + * @return The actual number of bytes read, or -1 if end of stream. + * + * @exception IOException If an error occurs. + */ + public synchronized int read(byte[] b, int off, int len) throws IOException + { + int numBytes = Math.min(buf.length - pos, len); + + if (numBytes > 0) + { + System.arraycopy (buf, pos, b, off, numBytes); + pos += numBytes; + len -= numBytes; + off += numBytes; + } + + if (len > 0) + { + len = super.read(b, off, len); + if (len == -1) //EOF + return numBytes > 0 ? numBytes : -1; + numBytes += len; + } + return numBytes; + } + + /** + * This method pushes a single byte of data into the pushback buffer. + * The byte pushed back is the one that will be returned as the first byte + * of the next read. + *

+ * If the pushback buffer is full, this method throws an exception. + *

+ * The argument to this method is an int. Only the low + * eight bits of this value are pushed back. + * + * @param b The byte to be pushed back, passed as an int + * + * @exception IOException If the pushback buffer is full. + */ + public synchronized void unread(int b) throws IOException + { + if (pos <= 0) + throw new IOException("Insufficient space in pushback buffer"); + + buf[--pos] = (byte) b; + } + + /** + * This method pushes all of the bytes in the passed byte array into + * the pushback bfer. These bytes are pushed in reverse order so that + * the next byte read from the stream after this operation will be + * b[0] followed by b[1], etc. + *

+ * If the pushback buffer cannot hold all of the requested bytes, an + * exception is thrown. + * + * @param b The byte array to be pushed back + * + * @exception IOException If the pushback buffer is full + */ + public synchronized void unread(byte[] b) throws IOException + { + unread(b, 0, b.length); + } + + /** + * This method pushed back bytes from the passed in array into the + * pushback buffer. The bytes from b[offset] to + * b[offset + len] are pushed in reverse order so that + * the next byte read from the stream after this operation will be + * b[offset] followed by b[offset + 1], + * etc. + *

+ * If the pushback buffer cannot hold all of the requested bytes, an + * exception is thrown. + * + * @param b The byte array to be pushed back + * @param off The index into the array where the bytes to be push start + * @param len The number of bytes to be pushed. + * + * @exception IOException If the pushback buffer is full + */ + public synchronized void unread(byte[] b, int off, int len) + throws IOException + { + if (pos < len) + throw new IOException("Insufficient space in pushback buffer"); + + // Note the order that these bytes are being added is the opposite + // of what would be done if they were added to the buffer one at a time. + // See the Java Class Libraries book p. 1390. + System.arraycopy(b, off, buf, pos - len, len); + + // Don't put this into the arraycopy above, an exception might be thrown + // and in that case we don't want to modify pos. + pos -= len; + } + + /** + * This method skips the specified number of bytes in the stream. It + * returns the actual number of bytes skipped, which may be less than the + * requested amount. + *

+ * This method first discards bytes from the buffer, then calls the + * skip method on the underlying InputStream to + * skip additional bytes if necessary. + * + * @param n The requested number of bytes to skip + * + * @return The actual number of bytes skipped. + * + * @exception IOException If an error occurs + * + * @since 1.2 + */ + public synchronized long skip(long n) throws IOException + { + final long origN = n; + + if (n > 0L) + { + int numread = (int) Math.min((long) (buf.length - pos), n); + pos += numread; + n -= numread; + if (n > 0) + n -= super.skip(n); + } + + return origN - n; + } +} diff --git a/libjava/classpath/java/io/PushbackReader.java b/libjava/classpath/java/io/PushbackReader.java new file mode 100644 index 000000000..43bf826a8 --- /dev/null +++ b/libjava/classpath/java/io/PushbackReader.java @@ -0,0 +1,383 @@ +/* PushbackReader.java -- An character stream that can unread chars + Copyright (C) 1998, 2000, 2001, 2003, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This subclass of FilterReader provides the ability to + * unread data from a stream. It maintains an internal buffer of unread + * data that is supplied to the next read operation. This is conceptually + * similar to mark/reset functionality, except that in this case the + * position to reset the stream to does not need to be known in advance. + *

+ * The default pushback buffer size one char, but this can be overridden + * by the creator of the stream. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Warren Levy (warrenl@cygnus.com) + */ +public class PushbackReader extends FilterReader +{ + /** + * This is the default buffer size + */ + private static final int DEFAULT_BUFFER_SIZE = 1; + + /** + * This is the buffer that is used to store the pushed back data + */ + private char[] buf; + + /** + * This is the position in the buffer from which the next char will be + * read. Bytes are stored in reverse order in the buffer, starting from + * buf[buf.length - 1] to buf[0]. Thus when + * pos is 0 the buffer is full and buf.length when + * it is empty + */ + private int pos; + + /** + * This method initializes a PushbackReader to read from the + * specified subordinate Reader with a default pushback buffer + * size of 1. + * + * @param in The subordinate stream to read from + */ + public PushbackReader(Reader in) + { + this(in, DEFAULT_BUFFER_SIZE); + } + + /** + * This method initializes a PushbackReader to read from the + * specified subordinate Reader with the specified buffer + * size + * + * @param in The subordinate Reader to read from + * @param bufsize The pushback buffer size to use + */ + public PushbackReader(Reader in, int bufsize) + { + super(in); + + if (bufsize < 0) + throw new IllegalArgumentException("buffer size must be positive"); + + buf = new char[bufsize]; + pos = bufsize; + } + + /** + * This method closes the stream and frees any associated resources. + * + * @exception IOException If an error occurs. + */ + public void close() throws IOException + { + synchronized (lock) + { + buf = null; + super.close(); + } + } + + /** + * This method throws an exception when called since this class does + * not support mark/reset. + * + * @param read_limit Not used. + * + * @exception IOException Always thrown to indicate mark/reset not supported. + */ + public void mark(int read_limit) throws IOException + { + throw new IOException("mark not supported in this class"); + } + + /** + * This method returns false to indicate that it does not support + * mark/reset functionality. + * + * @return This method returns false to indicate that this + * class does not support mark/reset functionality + * + */ + public boolean markSupported() + { + return(false); + } + + /** + * This method always throws an IOException in this class because + * mark/reset functionality is not supported. + * + * @exception IOException Always thrown for this class + */ + public void reset() throws IOException + { + throw new IOException("reset not supported in this class"); + } + + /** + * This method determines whether or not this stream is ready to be read. + * If it returns false to indicate that the stream is not + * ready, any attempt to read from the stream could (but is not + * guaranteed to) block. + *

+ * This stream is ready to read if there are either chars waiting to be + * read in the pushback buffer or if the underlying stream is ready to + * be read. + * + * @return true if this stream is ready to be read, + * false otherwise + * + * @exception IOException If an error occurs + */ + public boolean ready() throws IOException + { + synchronized (lock) + { + if (buf == null) + throw new IOException ("stream closed"); + + if (((buf.length - pos) > 0) || super.ready()) + return(true); + else + return(false); + } + } + + // Don't delete this method just because the spec says it shouldn't be there! + // See the CVS log for details. + /** + * This method skips the specified number of chars in the stream. It + * returns the actual number of chars skipped, which may be less than the + * requested amount. + *

+ * This method first discards chars from the buffer, then calls the + * skip method on the underlying Reader to + * skip additional chars if necessary. + * + * @param num_chars The requested number of chars to skip + * + * @return The actual number of chars skipped. + * + * @exception IOException If an error occurs + */ + public long skip(long num_chars) throws IOException + { + synchronized (lock) + { + if (num_chars <= 0) + return(0); + + if ((buf.length - pos) >= num_chars) + { + pos += num_chars; + return(num_chars); + } + + int chars_discarded = buf.length - pos; + pos = buf.length; + + long chars_skipped = in.skip(num_chars - chars_discarded); + + return(chars_discarded + chars_skipped); + } + } + + /** + * This method reads an unsigned char from the input stream and returns it + * as an int in the range of 0-65535. This method also will return -1 if + * the end of the stream has been reached. The char returned will be read + * from the pushback buffer, unless the buffer is empty, in which case + * the char will be read from the underlying stream. + *

+ * This method will block until the char can be read. + * + * @return The char read or -1 if end of stream + * + * @exception IOException If an error occurs + */ + public int read() throws IOException + { + synchronized (lock) + { + if (buf == null) + throw new IOException("stream closed"); + + if (pos == buf.length) + return(super.read()); + + ++pos; + return((buf[pos - 1] & 0xFFFF)); + } + } + + /** + * This method read chars from a stream and stores them into a caller + * supplied buffer. It starts storing the data at index offset + * into + * the buffer and attempts to read len chars. This method can + * return before reading the number of chars requested. The actual number + * of chars read is returned as an int. A -1 is returned to indicate the + * end of the stream. + *

+ * This method will block until some data can be read. + *

+ * This method first reads chars from the pushback buffer in order to + * satisfy the read request. If the pushback buffer cannot provide all + * of the chars requested, the remaining chars are read from the + * underlying stream. + * + * @param buffer The array into which the chars read should be stored + * @param offset The offset into the array to start storing chars + * @param length The requested number of chars to read + * + * @return The actual number of chars read, or -1 if end of stream. + * + * @exception IOException If an error occurs. + */ + public synchronized int read(char[] buffer, int offset, int length) + throws IOException + { + synchronized (lock) + { + if (buf == null) + throw new IOException("stream closed"); + + if (offset < 0 || length < 0 || offset + length > buffer.length) + throw new ArrayIndexOutOfBoundsException(); + + int numBytes = Math.min(buf.length - pos, length); + if (numBytes > 0) + { + System.arraycopy (buf, pos, buffer, offset, numBytes); + pos += numBytes; + return numBytes; + } + + return super.read(buffer, offset, length); + } + } + + /** + * This method pushes a single char of data into the pushback buffer. + * The char pushed back is the one that will be returned as the first char + * of the next read. + *

+ * If the pushback buffer is full, this method throws an exception. + *

+ * The argument to this method is an int. Only the low eight + * bits of this value are pushed back. + * + * @param b The char to be pushed back, passed as an int + * + * @exception IOException If the pushback buffer is full. + */ + public void unread(int b) throws IOException + { + synchronized (lock) + { + if (buf == null) + throw new IOException("stream closed"); + if (pos == 0) + throw new IOException("Pushback buffer is full"); + + --pos; + buf[pos] = (char)(b & 0xFFFF); + } + } + + /** + * This method pushes all of the chars in the passed char array into + * the pushback buffer. These chars are pushed in reverse order so that + * the next char read from the stream after this operation will be + * buf[0] followed by buf[1], etc. + *

+ * If the pushback buffer cannot hold all of the requested chars, an + * exception is thrown. + * + * @param buf The char array to be pushed back + * + * @exception IOException If the pushback buffer is full + */ + public synchronized void unread(char[] buf) throws IOException + { + unread(buf, 0, buf.length); + } + + /** + * This method pushed back chars from the passed in array into the pushback + * buffer. The chars from buf[offset] to + * buf[offset + len] + * are pushed in reverse order so that the next char read from the stream + * after this operation will be buf[offset] followed by + * buf[offset + 1], etc. + *

+ * If the pushback buffer cannot hold all of the requested chars, an + * exception is thrown. + * + * @param buffer The char array to be pushed back + * @param offset The index into the array where the chars to be push start + * @param length The number of chars to be pushed. + * + * @exception IOException If the pushback buffer is full + */ + public synchronized void unread(char[] buffer, int offset, int length) + throws IOException + { + synchronized (lock) + { + if (buf == null) + throw new IOException("stream closed"); + if (pos < length) + throw new IOException("Pushback buffer is full"); + + // Note the order that these chars are being added is the opposite + // of what would be done if they were added to the buffer one at a time. + // See the Java Class Libraries book p. 1397. + System.arraycopy(buffer, offset, buf, pos - length, length); + + // Don't put this into the arraycopy above, an exception might be thrown + // and in that case we don't want to modify pos. + pos -= length; + } + } +} diff --git a/libjava/classpath/java/io/RandomAccessFile.java b/libjava/classpath/java/io/RandomAccessFile.java new file mode 100644 index 000000000..da0c81272 --- /dev/null +++ b/libjava/classpath/java/io/RandomAccessFile.java @@ -0,0 +1,1049 @@ +/* RandomAccessFile.java -- Class supporting random file I/O + Copyright (C) 1998, 1999, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +import gnu.java.nio.FileChannelImpl; + +import java.nio.channels.FileChannel; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * Status: Believe complete and correct to 1.1. + */ + +/** + * This class allows reading and writing of files at random locations. + * Most Java I/O classes are either pure sequential input or output. This + * class fulfills the need to be able to read the bytes of a file in an + * arbitrary order. In addition, this class implements the + * DataInput and DataOutput interfaces to allow + * the reading and writing of Java primitives. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + */ +public class RandomAccessFile implements DataOutput, DataInput, Closeable +{ + + // The underlying file. + private FileChannelImpl ch; + private FileDescriptor fd; + // The corresponding input and output streams. + private DataOutputStream out; + private DataInputStream in; + + + /** + * This method initializes a new instance of RandomAccessFile + * to read from the specified File object with the specified + * access mode. The access mode is either "r" for read only access or "rw" + * for read-write access. + *

+ * Note that a SecurityManager check is made prior to + * opening the file to determine whether or not this file is allowed to + * be read or written. + * + * @param file The File object to read and/or write. + * @param mode "r" for read only or "rw" for read-write access to the file + * + * @exception IllegalArgumentException If mode has an + * illegal value + * @exception SecurityException If the requested access to the file + * is not allowed + * @exception FileNotFoundException If the file is a directory, or + * any other error occurs + */ + public RandomAccessFile (File file, String mode) + throws FileNotFoundException + { + int fdmode; + if (mode.equals("r")) + fdmode = FileChannelImpl.READ; + else if (mode.equals("rw")) + fdmode = FileChannelImpl.READ | FileChannelImpl.WRITE; + else if (mode.equals("rws")) + { + fdmode = (FileChannelImpl.READ | FileChannelImpl.WRITE + | FileChannelImpl.SYNC); + } + else if (mode.equals("rwd")) + { + fdmode = (FileChannelImpl.READ | FileChannelImpl.WRITE + | FileChannelImpl.DSYNC); + } + else + throw new IllegalArgumentException ("invalid mode: " + mode); + + final String fileName = file.getPath(); + + // The obligatory SecurityManager stuff + SecurityManager s = System.getSecurityManager(); + if (s != null) + { + s.checkRead(fileName); + + if ((fdmode & FileChannelImpl.WRITE) != 0) + s.checkWrite(fileName); + } + + try + { + ch = FileChannelImpl.create(file, fdmode); + } + catch (FileNotFoundException fnfe) + { + throw fnfe; + } + catch (IOException ioe) + { + FileNotFoundException fnfe = new FileNotFoundException(file.getPath()); + fnfe.initCause(ioe); + throw fnfe; + } + fd = new FileDescriptor(ch); + if ((fdmode & FileChannelImpl.WRITE) != 0) + out = new DataOutputStream (new FileOutputStream (fd)); + else + out = null; + in = new DataInputStream (new FileInputStream (fd)); + } + + /** + * This method initializes a new instance of RandomAccessFile + * to read from the specified file name with the specified access mode. + * The access mode is either "r" for read only access, "rw" for read + * write access, "rws" for synchronized read/write access of both + * content and metadata, or "rwd" for read/write access + * where only content is required to be synchronous. + *

+ * Note that a SecurityManager check is made prior to + * opening the file to determine whether or not this file is allowed to + * be read or written. + * + * @param fileName The name of the file to read and/or write + * @param mode "r", "rw", "rws", or "rwd" + * + * @exception IllegalArgumentException If mode has an + * illegal value + * @exception SecurityException If the requested access to the file + * is not allowed + * @exception FileNotFoundException If the file is a directory or + * any other error occurs + */ + public RandomAccessFile (String fileName, String mode) + throws FileNotFoundException + { + this (new File(fileName), mode); + } + + /** + * This method closes the file and frees up all file related system + * resources. Since most operating systems put a limit on how many files + * may be opened at any given time, it is a good idea to close all files + * when no longer needed to avoid hitting this limit + */ + public void close () throws IOException + { + ch.close(); + } + + /** + * This method returns a FileDescriptor object that + * represents the native file handle for this file. + * + * @return The FileDescriptor object for this file + * + * @exception IOException If an error occurs + */ + public final FileDescriptor getFD () throws IOException + { + synchronized (this) + { + if (fd == null) + fd = new FileDescriptor (ch); + return fd; + } + } + + /** + * This method returns the current offset in the file at which the next + * read or write will occur + * + * @return The current file position + * + * @exception IOException If an error occurs + */ + public long getFilePointer () throws IOException + { + return ch.position(); + } + + /** + * This method sets the length of the file to the specified length. + * If the currently length of the file is longer than the specified + * length, then the file is truncated to the specified length (the + * file position is set to the end of file in this case). If the + * current length of the file is shorter than the specified length, + * the file is extended with bytes of an undefined value (the file + * position is unchanged in this case). + *

+ * The file must be open for write access for this operation to succeed. + * + * @param newLen The new length of the file + * + * @exception IOException If an error occurs + */ + public void setLength (long newLen) throws IOException + { + // FIXME: Extending a file should probably be done by one method call. + + // FileChannel.truncate() can only shrink a file. + // To expand it we need to seek forward and write at least one byte. + if (newLen < length()) + ch.truncate (newLen); + else if (newLen > length()) + { + long pos = getFilePointer(); + seek(newLen - 1); + write(0); + seek(pos); + } + } + + /** + * This method returns the length of the file in bytes + * + * @return The length of the file + * + * @exception IOException If an error occurs + */ + public long length () throws IOException + { + return ch.size(); + } + + /** + * This method reads a single byte of data from the file and returns it + * as an integer. + * + * @return The byte read as an int, or -1 if the end of the file was reached. + * + * @exception IOException If an error occurs + */ + public int read () throws IOException + { + return in.read(); + } + + /** + * This method reads bytes from the file into the specified array. The + * bytes are stored starting at the beginning of the array and up to + * buf.length bytes can be read. + * + * @param buffer The buffer to read bytes from the file into + * + * @return The actual number of bytes read or -1 if end of file + * + * @exception IOException If an error occurs + */ + public int read (byte[] buffer) throws IOException + { + return in.read (buffer); + } + + /** + * This methods reads up to len bytes from the file into the + * specified array starting at position offset into the array. + * + * @param buffer The array to read the bytes into + * @param offset The index into the array to start storing bytes + * @param len The requested number of bytes to read + * + * @return The actual number of bytes read, or -1 if end of file + * + * @exception IOException If an error occurs + */ + public int read (byte[] buffer, int offset, int len) throws IOException + { + return in.read (buffer, offset, len); + } + + /** + * This method reads a Java boolean value from an input stream. It does + * so by reading a single byte of data. If that byte is zero, then the + * value returned is false If the byte is non-zero, then + * the value returned is true + *

+ * This method can read a boolean written by an object + * implementing the + * writeBoolean() method in the DataOutput + * interface. + * + * @return The boolean value read + * + * @exception EOFException If end of file is reached before reading the + * boolean + * @exception IOException If any other error occurs + */ + public final boolean readBoolean () throws IOException + { + return in.readBoolean (); + } + + /** + * This method reads a Java byte value from an input stream. The value + * is in the range of -128 to 127. + *

+ * This method can read a byte written by an object + * implementing the + * writeByte() method in the DataOutput interface. + * + * @return The byte value read + * + * @exception EOFException If end of file is reached before reading the byte + * @exception IOException If any other error occurs + * + * @see DataOutput + */ + public final byte readByte () throws IOException + { + return in.readByte (); + } + + /** + * This method reads a Java char value from an input stream. + * It operates by reading two bytes from the stream and converting them to + * a single 16-bit Java char The two bytes are stored most + * significant byte first (i.e., "big endian") regardless of the native + * host byte ordering. + *

+ * As an example, if byte1 and byte2 represent + * the first + * and second byte read from the stream respectively, they will be + * transformed to a char in the following manner: + *

+ * (char)(((byte1 & 0xFF) << 8) | (byte2 & 0xFF) + *

+ * This method can read a char written by an object + * implementing the + * writeChar() method in the DataOutput interface. + * + * @return The char value read + * + * @exception EOFException If end of file is reached before reading the char + * @exception IOException If any other error occurs + * + * @see DataOutput + */ + public final char readChar () throws IOException + { + return in.readChar(); + } + + /** + * This method reads a Java double value from an input stream. It operates + * by first reading a logn value from the stream by calling the + * readLong() method in this interface, then + * converts that long + * to a double using the longBitsToDouble + * method in the class java.lang.Double + *

+ * This method can read a double written by an object + * implementing the + * writeDouble() method in the DataOutput + * interface. + * + * @return The double value read + * + * @exception EOFException If end of file is reached before reading + * the double + * @exception IOException If any other error occurs + * + * @see java.lang.Double + * @see DataOutput + */ + public final double readDouble () throws IOException + { + return in.readDouble (); + } + + /** + * This method reads a Java float value from an input stream. It operates + * by first reading an int value from the stream by calling the + * readInt() method in this interface, then converts + * that int + * to a float using the intBitsToFloat method in + * the class java.lang.Float + *

+ * This method can read a float written by an object + * implementing the + * writeFloat() method in the DataOutput interface. + * + * @return The float value read + * + * @exception EOFException If end of file is reached before reading the float + * @exception IOException If any other error occurs + * + * @see java.lang.Float + * @see DataOutput + */ + public final float readFloat () throws IOException + { + return in.readFloat(); + } + + /** + * This method reads raw bytes into the passed array until the array is + * full. Note that this method blocks until the data is available and + * throws an exception if there is not enough data left in the stream to + * fill the buffer + * + * @param buffer The buffer into which to read the data + * + * @exception EOFException If end of file is reached before filling the + * buffer + * @exception IOException If any other error occurs + */ + public final void readFully (byte[] buffer) throws IOException + { + in.readFully(buffer); + } + + /** + * This method reads raw bytes into the passed array buf + * starting + * offset bytes into the buffer. The number of bytes read + * will be + * exactly len Note that this method blocks until the data is + * available and throws an exception if there is not enough data left in + * the stream to read len bytes. + * + * @param buffer The buffer into which to read the data + * @param offset The offset into the buffer to start storing data + * @param count The number of bytes to read into the buffer + * + * @exception EOFException If end of file is reached before filling + * the buffer + * @exception IOException If any other error occurs + */ + public final void readFully (byte[] buffer, int offset, int count) + throws IOException + { + in.readFully (buffer, offset, count); + } + + /** + * This method reads a Java int value from an input stream + * It operates by reading four bytes from the stream and converting them to + * a single Java int The bytes are stored most + * significant byte first (i.e., "big endian") regardless of the native + * host byte ordering. + *

+ * As an example, if byte1 through byte4 + * represent the first + * four bytes read from the stream, they will be + * transformed to an int in the following manner: + *

+ * (int)(((byte1 & 0xFF) << 24) + ((byte2 & 0xFF) << 16) + + * ((byte3 & 0xFF) << 8) + (byte4 & 0xFF))) + *

+ * The value returned is in the range of 0 to 65535. + *

+ * This method can read an int written by an object + * implementing the + * writeInt() method in the DataOutput interface. + * + * @return The int value read + * + * @exception EOFException If end of file is reached before reading the int + * @exception IOException If any other error occurs + * + * @see DataOutput + */ + public final int readInt () throws IOException + { + return in.readInt(); + } + + /** + * This method reads the next line of text data from an input stream. + * It operates by reading bytes and converting those bytes to + * char + * values by treating the byte read as the low eight bits of the + * char + * and using 0 as the high eight bits. Because of this, it does + * not support the full 16-bit Unicode character set. + *

+ * The reading of bytes ends when either the end of file or a line terminator + * is encountered. The bytes read are then returned as a String + * A line terminator is a byte sequence consisting of either + * \r \n or \r\n These + * termination charaters are + * discarded and are not returned as part of the string. + *

+ * This method can read data that was written by an object implementing the + * writeLine() method in DataOutput + * + * @return The line read as a String + * + * @exception IOException If an error occurs + * + * @see DataOutput + */ + public final String readLine () throws IOException + { + return in.readLine (); + } + + /** + * This method reads a Java long value from an input stream + * It operates by reading eight bytes from the stream and converting them to + * a single Java long The bytes are stored most + * significant byte first (i.e., "big endian") regardless of the native + * host byte ordering. + *

+ * As an example, if byte1 through byte8 + * represent the first + * eight bytes read from the stream, they will be + * transformed to an long in the following manner: + *

+ * + * (long)((((long)byte1 & 0xFF) << 56) + (((long)byte2 & 0xFF) << 48) + + * (((long)byte3 & 0xFF) << 40) + (((long)byte4 & 0xFF) << 32) + + * (((long)byte5 & 0xFF) << 24) + (((long)byte6 & 0xFF) << 16) + + * (((long)byte7 & 0xFF) << 8) + ((long)byte9 & 0xFF))) + *

+ * The value returned is in the range of 0 to 65535. + *

+ * This method can read an long written by an object + * implementing the + * writeLong() method in the DataOutput interface. + * + * @return The long value read + * + * @exception EOFException If end of file is reached before reading the long + * @exception IOException If any other error occurs + * + * @see DataOutput + */ + public final long readLong () throws IOException + { + return in.readLong(); + } + + /** + * This method reads a signed 16-bit value into a Java in from the stream. + * It operates by reading two bytes from the stream and converting them to + * a single 16-bit Java short The two bytes are stored most + * significant byte first (i.e., "big endian") regardless of the native + * host byte ordering. + *

+ * As an example, if byte1 and byte2 + * represent the first + * and second byte read from the stream respectively, they will be + * transformed to a short in the following manner: + *

+ * (short)(((byte1 & 0xFF) << 8) | (byte2 & 0xFF) + *

+ * The value returned is in the range of -32768 to 32767. + *

+ * This method can read a short written by an object + * implementing the + * writeShort() method in the DataOutput interface. + * + * @return The short value read + * + * @exception EOFException If end of file is reached before reading the value + * @exception IOException If any other error occurs + * + * @see DataOutput + */ + public final short readShort () throws IOException + { + return in.readShort(); + } + + /** + * This method reads 8 unsigned bits into a Java int value + * from the + * stream. The value returned is in the range of 0 to 255. + *

+ * This method can read an unsigned byte written by an object implementing + * the writeUnsignedByte() method in the + * DataOutput interface. + * + * @return The unsigned bytes value read as a Java int + * + * @exception EOFException If end of file is reached before reading the value + * @exception IOException If any other error occurs + * + * @see DataOutput + */ + public final int readUnsignedByte () throws IOException + { + return in.readUnsignedByte(); + } + + /** + * This method reads 16 unsigned bits into a Java int value from the stream. + * It operates by reading two bytes from the stream and converting them to + * a single Java int The two bytes are stored most + * significant byte first (i.e., "big endian") regardless of the native + * host byte ordering. + *

+ * As an example, if byte1 and byte2 + * represent the first + * and second byte read from the stream respectively, they will be + * transformed to an int in the following manner: + *

+ * (int)(((byte1 & 0xFF) << 8) + (byte2 & 0xFF)) + *

+ * The value returned is in the range of 0 to 65535. + *

+ * This method can read an unsigned short written by an object implementing + * the writeUnsignedShort() method in the + * DataOutput interface. + * + * @return The unsigned short value read as a Java int + * + * @exception EOFException If end of file is reached before reading the value + * @exception IOException If any other error occurs + */ + public final int readUnsignedShort () throws IOException + { + return in.readUnsignedShort(); + } + + /** + * This method reads a String from an input stream that + * is encoded in + * a modified UTF-8 format. This format has a leading two byte sequence + * that contains the remaining number of bytes to read. This two byte + * sequence is read using the readUnsignedShort() method of this + * interface. + *

+ * After the number of remaining bytes have been determined, these bytes + * are read an transformed into char values. + * These char values + * are encoded in the stream using either a one, two, or three byte format. + * The particular format in use can be determined by examining the first + * byte read. + *

+ * If the first byte has a high order bit of 0 then + * that character consists on only one byte. This character value consists + * of seven bits that are at positions 0 through 6 of the byte. As an + * example, if byte1 is the byte read from the stream, it would + * be converted to a char like so: + *

+ * (char)byte1 + *

+ * If the first byte has 110 as its high order bits, then the + * character consists of two bytes. The bits that make up the character + * value are in positions 0 through 4 of the first byte and bit positions + * 0 through 5 of the second byte. (The second byte should have + * 10 as its high order bits). These values are in most significant + * byte first (i.e., "big endian") order. + *

+ * As an example, if byte1 and byte2 + * are the first two bytes + * read respectively, and the high order bits of them match the patterns + * which indicate a two byte character encoding, then they would be + * converted to a Java char like so: + *

+ * (char)(((byte1 & 0x1F) << 6) | (byte2 & 0x3F)) + *

+ * If the first byte has a 1110 as its high order bits, then the + * character consists of three bytes. The bits that make up the character + * value are in positions 0 through 3 of the first byte and bit positions + * 0 through 5 of the other two bytes. (The second and third bytes should + * have 10 as their high order bits). These values are in most + * significant byte first (i.e., "big endian") order. + *

+ * As an example, if byte1 byte2 + * and byte3 are the + * three bytes read, and the high order bits of them match the patterns + * which indicate a three byte character encoding, then they would be + * converted to a Java char like so: + *

+ * (char)(((byte1 & 0x0F) << 12) | ((byte2 & 0x3F) << 6) | + * (byte3 & 0x3F)) + *

+ * Note that all characters are encoded in the method that requires the + * fewest number of bytes with the exception of the character with the + * value of \u0000 which is encoded as two bytes. This is + * a modification of the UTF standard used to prevent C language style + * NUL values from appearing in the byte stream. + *

+ * This method can read data that was written by an object implementing the + * writeUTF() method in DataOutput + * + * @return The String read + * + * @exception EOFException If end of file is reached before reading the + * String + * @exception UTFDataFormatException If the data is not in UTF-8 format + * @exception IOException If any other error occurs + * + * @see DataOutput + */ + public final String readUTF () throws IOException + { + return in.readUTF(); + } + + /** + * This method sets the current file position to the specified offset + * from the beginning of the file. Note that some operating systems will + * allow the file pointer to be set past the current end of the file. + * + * @param pos The offset from the beginning of the file at which to set + * the file pointer + * + * @exception IOException If an error occurs + */ + public void seek (long pos) throws IOException + { + ch.position(pos); + } + + /** + * This method attempts to skip and discard the specified number of bytes + * in the input stream. It may actually skip fewer bytes than requested. + * The actual number of bytes skipped is returned. This method will not + * skip any bytes if passed a negative number of bytes to skip. + * + * @param numBytes The requested number of bytes to skip. + * + * @return The number of bytes actually skipped. + * + * @exception IOException If an error occurs. + */ + public int skipBytes (int numBytes) throws IOException + { + if (numBytes < 0) + throw new IllegalArgumentException ("Can't skip negative bytes: " + + numBytes); + + if (numBytes == 0) + return 0; + + long oldPos = ch.position(); + long newPos = oldPos + numBytes; + long size = ch.size(); + if (newPos > size) + newPos = size; + ch.position(newPos); + return (int) (ch.position() - oldPos); + } + + /** + * This method writes a single byte of data to the file. The file must + * be open for read-write in order for this operation to succeed. + * + * @param oneByte The byte of data to write, passed as an int. + * + * @exception IOException If an error occurs + */ + public void write (int oneByte) throws IOException + { + if (out == null) + throw new IOException("Bad file descriptor"); + + out.write(oneByte); + } + + /** + * This method writes all the bytes in the specified array to the file. + * The file must be open read-write in order for this operation to succeed. + * + * @param buffer The array of bytes to write to the file + */ + public void write (byte[] buffer) throws IOException + { + if (out == null) + throw new IOException("Bad file descriptor"); + + out.write(buffer); + } + + /** + * This method writes len bytes to the file from the specified + * array starting at index offset into the array. + * + * @param buffer The array of bytes to write to the file + * @param offset The index into the array to start writing file + * @param len The number of bytes to write + * + * @exception IOException If an error occurs + */ + public void write (byte[] buffer, int offset, int len) throws IOException + { + if (out == null) + throw new IOException("Bad file descriptor"); + + out.write (buffer, offset, len); + } + + /** + * This method writes a Java boolean to the underlying output + * stream. For a value of true, 1 is written to the stream. + * For a value of false, 0 is written. + * + * @param val The boolean value to write to the stream + * + * @exception IOException If an error occurs + */ + public final void writeBoolean (boolean val) throws IOException + { + if (out == null) + throw new IOException("Bad file descriptor"); + + out.writeBoolean(val); + } + + /** + * This method writes a Java byte value to the underlying + * output stream. + * + * @param val The byte to write to the stream, passed + * as an int. + * + * @exception IOException If an error occurs + */ + public final void writeByte (int val) throws IOException + { + if (out == null) + throw new IOException("Bad file descriptor"); + + out.writeByte(val); + } + + /** + * This method writes a Java short to the stream, high byte + * first. This method requires two bytes to encode the value. + * + * @param val The short value to write to the stream, + * passed as an int. + * + * @exception IOException If an error occurs + */ + public final void writeShort (int val) throws IOException + { + if (out == null) + throw new IOException("Bad file descriptor"); + + out.writeShort(val); + } + + /** + * This method writes a single char value to the stream, + * high byte first. + * + * @param val The char value to write, passed as + * an int. + * + * @exception IOException If an error occurs + */ + public final void writeChar (int val) throws IOException + { + if (out == null) + throw new IOException("Bad file descriptor"); + + out.writeChar(val); + } + + /** + * This method writes a Java int to the stream, high bytes + * first. This method requires four bytes to encode the value. + * + * @param val The int value to write to the stream. + * + * @exception IOException If an error occurs + */ + public final void writeInt (int val) throws IOException + { + if (out == null) + throw new IOException("Bad file descriptor"); + + out.writeInt(val); + } + + /** + * This method writes a Java long to the stream, high bytes + * first. This method requires eight bytes to encode the value. + * + * @param val The long value to write to the stream. + * + * @exception IOException If an error occurs + */ + public final void writeLong (long val) throws IOException + { + if (out == null) + throw new IOException("Bad file descriptor"); + + out.writeLong(val); + } + + /** + * This method writes a Java float value to the stream. This + * value is written by first calling the method + * Float.floatToIntBits + * to retrieve an int representing the floating point number, + * then writing this int value to the stream exactly the same + * as the writeInt() method does. + * + * @param val The floating point number to write to the stream. + * + * @exception IOException If an error occurs + * + * @see #writeInt(int) + */ + public final void writeFloat (float val) throws IOException + { + if (out == null) + throw new IOException("Bad file descriptor"); + + out.writeFloat(val); + } + + /** + * This method writes a Java double value to the stream. This + * value is written by first calling the method + * Double.doubleToLongBits + * to retrieve an long representing the floating point number, + * then writing this long value to the stream exactly the same + * as the writeLong() method does. + * + * @param val The double precision floating point number to write to the + * stream. + * + * @exception IOException If an error occurs + * + * @see #writeLong(long) + */ + public final void writeDouble (double val) throws IOException + { + if (out == null) + throw new IOException("Bad file descriptor"); + + out.writeDouble(val); + } + + /** + * This method writes all the bytes in a String out to the + * stream. One byte is written for each character in the String. + * The high eight bits of each character are discarded. + * + * @param val The String to write to the stream + * + * @exception IOException If an error occurs + */ + public final void writeBytes (String val) throws IOException + { + if (out == null) + throw new IOException("Bad file descriptor"); + + out.writeBytes(val); + } + + /** + * This method writes all the characters in a String to the + * stream. There will be two bytes for each character value. The high + * byte of the character will be written first. + * + * @param val The String to write to the stream. + * + * @exception IOException If an error occurs + */ + public final void writeChars (String val) throws IOException + { + if (out == null) + throw new IOException("Bad file descriptor"); + + out.writeChars(val); + } + + /** + * This method writes a Java String to the stream in a modified + * UTF-8 format. First, two bytes are written to the stream indicating the + * number of bytes to follow. Note that this is the number of bytes in the + * encoded String not the String length. Next + * come the encoded characters. Each character in the String + * is encoded as either one, two or three bytes. For characters in the + * range of \u0001 to \u007F, + * one byte is used. The character + * value goes into bits 0-7 and bit eight is 0. For characters in the range + * of \u0080 to \u007FF, two + * bytes are used. Bits + * 6-10 of the character value are encoded bits 0-4 of the first byte, with + * the high bytes having a value of "110". Bits 0-5 of the character value + * are stored in bits 0-5 of the second byte, with the high bits set to + * "10". This type of encoding is also done for the null character + * \u0000. This eliminates any C style NUL character values + * in the output. All remaining characters are stored as three bytes. + * Bits 12-15 of the character value are stored in bits 0-3 of the first + * byte. The high bits of the first bytes are set to "1110". Bits 6-11 + * of the character value are stored in bits 0-5 of the second byte. The + * high bits of the second byte are set to "10". And bits 0-5 of the + * character value are stored in bits 0-5 of byte three, with the high bits + * of that byte set to "10". + * + * @param val The String to write to the output in UTF format + * + * @exception IOException If an error occurs + */ + public final void writeUTF (String val) throws IOException + { + if (out == null) + throw new IOException("Bad file descriptor"); + + out.writeUTF(val); + } + + /** + * This method creates a java.nio.channels.FileChannel. + * Nio does not allow one to create a file channel directly. + * A file channel must be created by first creating an instance of + * Input/Output/RandomAccessFile and invoking the getChannel() method on it. + */ + public final synchronized FileChannel getChannel () + { + return ch; + } +} diff --git a/libjava/classpath/java/io/Reader.java b/libjava/classpath/java/io/Reader.java new file mode 100644 index 000000000..11a12f812 --- /dev/null +++ b/libjava/classpath/java/io/Reader.java @@ -0,0 +1,286 @@ +/* Reader.java -- base class of classes that read input as a stream of chars + Copyright (C) 1998, 1999, 2000, 2003, 2004, 2005 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package java.io; + +import java.nio.CharBuffer; + +/* Written using "Java Class Libraries", 2nd edition, plus online + * API docs for JDK 1.2 beta from http://www.javasoft.com. + * Status: Believed complete and correct. + */ + +/** + * This abstract class forms the base of the hierarchy of classes that read + * input as a stream of characters. It provides a common set of methods for + * reading characters from streams. Subclasses implement and extend these + * methods to read characters from a particular input source such as a file + * or network connection. + * + * @author Per Bothner (bothner@cygnus.com) + * @date April 21, 1998. + * @author Aaron M. Renn (arenn@urbanophile.com) + */ +public abstract class Reader implements Closeable, Readable +{ + /** + * This is the Object used for synchronizing critical code + * sections. Subclasses should use this variable instead of a + * synchronized method or an explicit synchronization on this + */ + protected Object lock; + + /** + * Unitializes a Reader that will use the object + * itself for synchronization of critical code sections. + */ + protected Reader() + { + this.lock = this; + } + + /** + * Initializes a Reader that will use the specified + * Object for synchronization of critical code sections. + * + * @param lock The Object to use for synchronization + */ + protected Reader(Object lock) + { + this.lock = lock; + } + + /** + * Read chars from a stream and stores them into a caller + * supplied buffer. It starts storing the data at index offset + * into the buffer and attempts to read len chars. This method + * can return before reading the number of chars requested. The actual + * number of chars read is returned as an int. A -1 is returned to indicate + * the end of the stream. + *

+ * This method will block until some data can be read. + *

+ * This method operates by calling the single char read() method + * in a loop until the desired number of chars are read. The read loop + * stops short if the end of the stream is encountered or if an IOException + * is encountered on any read operation except the first. If the first + * attempt to read a chars fails, the IOException is allowed to propagate + * upward. And subsequent IOException is caught and treated identically + * to an end of stream condition. Subclasses can (and should if possible) + * override this method to provide a more efficient implementation. + * + * @param buf The array into which the chars read should be stored + * @param offset The offset into the array to start storing chars + * @param count The requested number of chars to read + * + * @return The actual number of chars read, or -1 if end of stream. + * + * @exception IOException If an error occurs. + */ + public abstract int read(char buf[], int offset, int count) + throws IOException; + + /** + * Reads chars from a stream and stores them into a caller + * supplied buffer. This method attempts to completely fill the buffer, + * but can return before doing so. The actual number of chars read is + * returned as an int. A -1 is returned to indicate the end of the stream. + *

+ * This method will block until some data can be read. + *

+ * This method operates by calling an overloaded read method like so: + * read(buf, 0, buf.length) + * + * @param buf The buffer into which the chars read will be stored. + * + * @return The number of chars read or -1 if end of stream. + * + * @exception IOException If an error occurs. + */ + public int read(char buf[]) throws IOException + { + return read(buf, 0, buf.length); + } + + /** + * Reads an char from the input stream and returns it + * as an int in the range of 0-65535. This method also will return -1 if + * the end of the stream has been reached. + *

+ * This method will block until the char can be read. + * + * @return The char read or -1 if end of stream + * + * @exception IOException If an error occurs + */ + public int read() throws IOException + { + char[] buf = new char[1]; + int count = read(buf, 0, 1); + return count > 0 ? buf[0] : -1; + } + + /** @since 1.5 */ + public int read(CharBuffer buffer) throws IOException + { + // We want to call put(), so we don't manipulate the CharBuffer + // directly. + int rem = buffer.remaining(); + char[] buf = new char[rem]; + int result = read(buf, 0, rem); + if (result != -1) + buffer.put(buf, 0, result); + return result; + } + + /** + * Closes the stream. Any futher attempts to read from the + * stream may generate an IOException. + * + * @exception IOException If an error occurs + */ + public abstract void close() throws IOException; + + /** + * Returns a boolean that indicates whether the mark/reset + * methods are supported in this class. Those methods can be used to + * remember a specific point in the stream and reset the stream to that + * point. + *

+ * This method always returns false in this class, but + * subclasses can override this method to return true if they + * support mark/reset functionality. + * + * @return true if mark/reset functionality is supported, + * false otherwise + * + */ + public boolean markSupported() + { + return false; + } + + /** + * Marks a position in the input to which the stream can be + * "reset" by calling the reset() method. The parameter + * readlimit is the number of chars that can be read from the + * stream after setting the mark before the mark becomes invalid. For + * example, if mark() is called with a read limit of 10, then + * when 11 chars of data are read from the stream before the + * reset() method is called, then the mark is invalid and the + * stream object instance is not required to remember the mark. + * + * @param readLimit The number of chars that can be read before the mark + * becomes invalid + * + * @exception IOException If an error occurs such as mark not being + * supported for this class + */ + public void mark(int readLimit) throws IOException + { + throw new IOException("mark not supported"); + } + + /** + * Resets a stream to the point where the mark() + * method was called. Any chars that were read after the mark point was + * set will be re-read during subsequent reads. + *

+ * This method always throws an IOException in this class, but subclasses + * can override this method if they provide mark/reset functionality. + * + * @exception IOException Always thrown for this class + */ + public void reset() throws IOException + { + throw new IOException("reset not supported"); + } + + /** + * Determines whether or not this stream is ready to be + * read. If it returns false the stream may block if a + * read is attempted, but it is not guaranteed to do so. + *

+ * This method always returns false in this class + * + * @return true if the stream is ready to be read, + * false otherwise. + * + * @exception IOException If an error occurs + */ + public boolean ready() throws IOException + { + return false; + } + + /** + * Skips the specified number of chars in the stream. It + * returns the actual number of chars skipped, which may be less than the + * requested amount. + *

+ * This method reads and discards chars into a 256 char array until the + * specified number of chars were skipped or until either the end of stream + * is reached or a read attempt returns a short count. Subclasses can + * override this method to provide a more efficient implementation where + * one exists. + * + * @param count The requested number of chars to skip + * + * @return The actual number of chars skipped. + * + * @exception IOException If an error occurs + */ + public long skip(long count) throws IOException + { + if (count <= 0) + return 0; + int bsize = count > 1024 ? 1024 : (int) count; + char[] buffer = new char[bsize]; + long todo = count; + synchronized (lock) + { + while (todo > 0) + { + int skipped = read(buffer, 0, bsize > todo ? (int) todo : bsize); + if (skipped <= 0) + break; + todo -= skipped; + } + } + return count - todo; + } +} diff --git a/libjava/classpath/java/io/SequenceInputStream.java b/libjava/classpath/java/io/SequenceInputStream.java new file mode 100644 index 000000000..92f032ccf --- /dev/null +++ b/libjava/classpath/java/io/SequenceInputStream.java @@ -0,0 +1,223 @@ +/* SequenceInputStream.java -- Reads multiple input streams in sequence + Copyright (C) 1998, 1999, 2001, 2004, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +import java.util.Enumeration; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * plus online API docs for JDK 1.2 beta from http://www.javasoft.com. + * Status: Believed complete and correct. + */ + +/** + * This class merges a sequence of multiple InputStream's in + * order to form a single logical stream that can be read by applications + * that expect only one stream. + *

+ * The streams passed to the constructor method are read in order until + * they return -1 to indicate they are at end of stream. When a stream + * reports end of stream, it is closed, then the next stream is read. + * When the last stream is closed, the next attempt to read from this + * stream will return a -1 to indicate it is at end of stream. + *

+ * If this stream is closed prior to all subordinate streams being read + * to completion, all subordinate streams are closed. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Warren Levy (warrenl@cygnus.com) + */ +public class SequenceInputStream extends InputStream +{ + /** The handle for the current input stream. */ + private InputStream in; + + /** Secondary input stream; not used if constructed w/ enumeration. */ + private InputStream in2; + + /** + * The enumeration handle; not used if constructed w/ 2 explicit + * input streams. + */ + private Enumeration e; + + /** + * This method creates a new SequenceInputStream that obtains + * its list of subordinate InputStreams from the specified + * Enumeration + * + * @param e An Enumeration that will return a list of + * InputStreams to read in sequence + */ + public SequenceInputStream(Enumeration e) + { + this.e = e; + in = e.nextElement(); + in2 = null; + } + + /** + * This method creates a new SequenceInputStream that will read + * the two specified subordinate InputStreams in sequence. + * + * @param s1 The first InputStream to read + * @param s2 The second InputStream to read + */ + public SequenceInputStream(InputStream s1, InputStream s2) + { + in = s1; + in2 = s2; + } + + /** + * This method returns the number of bytes than can be read from the + * currently being read subordinate stream before that stream could + * block. Note that it is possible more bytes than this can actually + * be read without the stream blocking. If a 0 is returned, then the + * stream could block on the very next read. + * + * @return The number of bytes that can be read before blocking could occur + * + * @exception IOException If an error occurs + */ + public int available() throws IOException + { + if (in == null) + return 0; + + return in.available(); + } + + /** + * Closes this stream. This will cause any remaining unclosed subordinate + * InputStream's to be closed as well. Subsequent attempts to + * read from this stream may cause an exception. + * + * @exception IOException If an error occurs + */ + public void close() throws IOException + { + while (in != null) + { + in.close(); + in = getNextStream (); + } + } + + /** + * This method reads an unsigned byte from the input stream and returns it + * as an int in the range of 0-255. This method also will return -1 if + * the end of the stream has been reached. This will only happen when + * all of the subordinate streams have been read. + *

+ * This method will block until the byte can be read. + * + * @return The byte read, or -1 if end of stream + * + * @exception IOException If an error occurs + */ + public int read() throws IOException + { + int ch = -1; + + while (in != null && (ch = in.read()) < 0) + { + in.close(); + in = getNextStream(); + } + + return ch; + } + + /** + * This method reads bytes from a stream and stores them into a caller + * supplied buffer. It starts storing the data at index offset + * into the buffer and attempts to read len bytes. This method + * can return before reading the number of bytes requested. The actual number + * of bytes read is returned as an int. A -1 is returend to indicate the + * end of the stream. This will only happen when all of the subordinate + * streams have been read. + *

+ * This method will block until at least one byte can be read. + * + * @param b The array into which bytes read should be stored + * @param off The offset into the array to start storing bytes + * @param len The requested number of bytes to read + * + * @return The actual number of bytes read, or -1 if end of stream + * + * @exception IOException If an error occurs + */ + public int read(byte[] b, int off, int len) throws IOException + { + int ch = -1; + + // The validity of the parameters will be checked by in.read so + // don't bother doing it here. + while (in != null && (ch = in.read(b, off, len)) < 0) + { + in.close(); + in = getNextStream(); + } + + return ch; + } + + /** + * This private method is used to get the next InputStream to + * read from. Returns null when no more streams are available. + */ + private InputStream getNextStream() + { + InputStream nextIn = null; + + if (e != null) + { + if (e.hasMoreElements()) + nextIn = e.nextElement(); + } + else if (in2 != null) + { + nextIn = in2; + in2 = null; + } + + return nextIn; + } +} diff --git a/libjava/classpath/java/io/Serializable.java b/libjava/classpath/java/io/Serializable.java new file mode 100644 index 000000000..869fa6de8 --- /dev/null +++ b/libjava/classpath/java/io/Serializable.java @@ -0,0 +1,54 @@ +/* Serializable.java -- Interface to indicate a class may be serialized + Copyright (C) 1998, 1999, 2001, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * Status: Believed complete + */ + +/** + * This interface has no methods. It simply serves to indicate that + * the implementing class may be serialized. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Warren Levy (warrenl@cygnus.com) + */ +public interface Serializable +{ +} // interface Serializable diff --git a/libjava/classpath/java/io/SerializablePermission.java b/libjava/classpath/java/io/SerializablePermission.java new file mode 100644 index 000000000..88846cc35 --- /dev/null +++ b/libjava/classpath/java/io/SerializablePermission.java @@ -0,0 +1,112 @@ +/* SerializablePermission.java -- Basic permissions related to serialization. + Copyright (C) 1998, 2000, 2003 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +import java.security.BasicPermission; + +/** + * This class models permissions related to serialization. As a subclass + * of BasicPermission, this class has permissions that have + * a name only. There is no associated action list. + *

+ * There are currently two allowable permission names for this class: + *

    + *
  • enableSubclassImplementation - Allows a subclass to + * override the default serialization behavior of objects.
    • + *
  • enableSubstitution - Allows substitution of one object + * for another during serialization or deserialization.
    • + *
+ * + * @see java.security.BasicPermission + * + * @author Aaron M. Renn (arenn@urbanophile.com) + */ +public final class SerializablePermission extends BasicPermission +{ + static final long serialVersionUID = 8537212141160296410L; + + /* + * Class Variables + */ + + private static final String[] legal_names = { "enableSubclassImplementation", + "enableSubstitution" }; + /* + * Constructors + */ + + /** + * This method initializes a new instance of + * SerializablePermission + * that has the specified name. + * + * @param name The name of the permission. + * + * @exception IllegalArgumentException If the name is not valid for + * this class. + */ + public SerializablePermission(String name) + { + this(name, null); + } + + /** + * This method initializes a new instance of + * SerializablePermission + * that has the specified name and action list. Note that the action list + * is unused in this class. + * + * @param name The name of the permission. + * @param actions The action list (unused). + * + * @exception IllegalArgumentException If the name is not valid for + * this class. + */ + public SerializablePermission(String name, String actions) + { + super(name, actions); + + for (int i = 0; i < legal_names.length; i++) + if (legal_names[i].equals(name)) + return; + + throw new IllegalArgumentException("Bad permission name: " + name); + } + +} // class SerializablePermission diff --git a/libjava/classpath/java/io/StreamCorruptedException.java b/libjava/classpath/java/io/StreamCorruptedException.java new file mode 100644 index 000000000..d24d12150 --- /dev/null +++ b/libjava/classpath/java/io/StreamCorruptedException.java @@ -0,0 +1,73 @@ +/* StreamCorruptedException.java -- Error in stream during serialization + Copyright (C) 1998, 2000, 2001, 2002, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This exception is thrown when there is an error in the data that is + * read from a stream during de-serialization. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Warren Levy (warrenl@cygnus.com) + * @since 1.1 + * @status updated to 1.4 + */ +public class StreamCorruptedException extends ObjectStreamException +{ + /** + * Compatible with JDK 1.1+. + */ + private static final long serialVersionUID = 8983558202217591746L; + + /** + * Create an exception without a descriptive error message. + */ + public StreamCorruptedException() + { + } + + /** + * Create an exception with a descriptive error message. + * + * @param message the descriptive error message + */ + public StreamCorruptedException(String message) + { + super(message); + } +} // class StreamCorruptedException diff --git a/libjava/classpath/java/io/StreamTokenizer.java b/libjava/classpath/java/io/StreamTokenizer.java new file mode 100644 index 000000000..0245fbf51 --- /dev/null +++ b/libjava/classpath/java/io/StreamTokenizer.java @@ -0,0 +1,718 @@ +/* StreamTokenizer.java -- parses streams of characters into tokens + Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package java.io; + +import gnu.java.lang.CPStringBuilder; + +/** + * This class parses streams of characters into tokens. There are a + * million-zillion flags that can be set to control the parsing, as + * described under the various method headings. + * + * @author Warren Levy (warrenl@cygnus.com) + * @date October 25, 1998. + */ +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * plus online API docs for JDK 1.2 beta from http://www.javasoft.com. + * Status: Believed complete and correct. + */ + +public class StreamTokenizer +{ + /** A constant indicating that the end of the stream has been read. */ + public static final int TT_EOF = -1; + + /** A constant indicating that the end of the line has been read. */ + public static final int TT_EOL = '\n'; + + /** A constant indicating that a number token has been read. */ + public static final int TT_NUMBER = -2; + + /** A constant indicating that a word token has been read. */ + public static final int TT_WORD = -3; + + /** A constant indicating that no tokens have been read yet. */ + private static final int TT_NONE = -4; + + /** + * Contains the type of the token read resulting from a call to nextToken + * The rules are as follows: + *
    + *
  • For a token consisting of a single ordinary character, this is the + * value of that character.
    • + *
  • For a quoted string, this is the value of the quote character
    • + *
  • For a word, this is TT_WORD
    • + *
  • For a number, this is TT_NUMBER
    • + *
  • For the end of the line, this is TT_EOL
    • + *
  • For the end of the stream, this is TT_EOF
    • + *
+ */ + public int ttype = TT_NONE; + + /** The String associated with word and string tokens. */ + public String sval; + + /** The numeric value associated with number tokens. */ + public double nval; + + /* Indicates whether end-of-line is recognized as a token. */ + private boolean eolSignificant = false; + + /* Indicates whether word tokens are automatically made lower case. */ + private boolean lowerCase = false; + + /* Indicates whether C++ style comments are recognized and skipped. */ + private boolean slashSlash = false; + + /* Indicates whether C style comments are recognized and skipped. */ + private boolean slashStar = false; + + /* Attribute tables of each byte from 0x00 to 0xFF. */ + private boolean[] whitespace = new boolean[256]; + private boolean[] alphabetic = new boolean[256]; + private boolean[] numeric = new boolean[256]; + private boolean[] quote = new boolean[256]; + private boolean[] comment = new boolean[256]; + + /* The Reader associated with this class. */ + private PushbackReader in; + + /* Indicates if a token has been pushed back. */ + private boolean pushedBack = false; + + /* Contains the current line number of the reader. */ + private int lineNumber = 1; + + /** + * This method reads bytes from an InputStream and tokenizes + * them. For details on how this method operates by default, see + * StreamTokenizer(Reader). + * + * @param is The InputStream to read from + * + * @deprecated Since JDK 1.1. + */ + public StreamTokenizer(InputStream is) + { + this(new InputStreamReader(is)); + } + + /** + * This method initializes a new StreamTokenizer to read + * characters from a Reader and parse them. The char values + * have their hight bits masked so that the value is treated a character + * in the range of 0x0000 to 0x00FF. + *

+ * This constructor sets up the parsing table to parse the stream in the + * following manner: + *

    + *
  • The values 'A' through 'Z', 'a' through 'z' and 0xA0 through 0xFF + * are initialized as alphabetic
    • + *
  • The values 0x00 through 0x20 are initialized as whitespace
    • + *
  • The values '\'' and '"' are initialized as quote characters
    • + *
  • '/' is a comment character
    • + *
  • Numbers will be parsed
    • + *
  • EOL is not treated as significant
    • + *
  • C and C++ (//) comments are not recognized
    • + *
+ * + * @param r The Reader to read chars from + */ + public StreamTokenizer(Reader r) + { + in = new PushbackReader(r); + + whitespaceChars(0x00, 0x20); + wordChars('A', 'Z'); + wordChars('a', 'z'); + wordChars(0xA0, 0xFF); + commentChar('/'); + quoteChar('\''); + quoteChar('"'); + parseNumbers(); + } + + /** + * This method sets the comment attribute on the specified + * character. Other attributes for the character are cleared. + * + * @param ch The character to set the comment attribute for, passed as an int + */ + public void commentChar(int ch) + { + if (ch >= 0 && ch <= 255) + { + comment[ch] = true; + whitespace[ch] = false; + alphabetic[ch] = false; + numeric[ch] = false; + quote[ch] = false; + } + } + + /** + * This method sets a flag that indicates whether or not the end of line + * sequence terminates and is a token. The defaults to false + * + * @param flag true if EOF is significant, false + * otherwise + */ + public void eolIsSignificant(boolean flag) + { + eolSignificant = flag; + } + + /** + * This method returns the current line number. Note that if the + * pushBack() method is called, it has no effect on the + * line number returned by this method. + * + * @return The current line number + */ + public int lineno() + { + return lineNumber; + } + + /** + * This method sets a flag that indicates whether or not alphabetic + * tokens that are returned should be converted to lower case. + * + * @param flag true to convert to lower case, + * false otherwise + */ + public void lowerCaseMode(boolean flag) + { + lowerCase = flag; + } + + private boolean isWhitespace(int ch) + { + return (ch >= 0 && ch <= 255 && whitespace[ch]); + } + + private boolean isAlphabetic(int ch) + { + return ((ch > 255) || (ch >= 0 && alphabetic[ch])); + } + + private boolean isNumeric(int ch) + { + return (ch >= 0 && ch <= 255 && numeric[ch]); + } + + private boolean isQuote(int ch) + { + return (ch >= 0 && ch <= 255 && quote[ch]); + } + + private boolean isComment(int ch) + { + return (ch >= 0 && ch <= 255 && comment[ch]); + } + + /** + * This method reads the next token from the stream. It sets the + * ttype variable to the appropriate token type and + * returns it. It also can set sval or nval + * as described below. The parsing strategy is as follows: + *
    + *
  • Skip any whitespace characters.
    • + *
  • If a numeric character is encountered, attempt to parse a numeric + * value. Leading '-' characters indicate a numeric only if followed by + * another non-'-' numeric. The value of the numeric token is terminated + * by either the first non-numeric encountered, or the second occurrence of + * '-' or '.'. The token type returned is TT_NUMBER and nval + * is set to the value parsed.
    • + *
  • If an alphabetic character is parsed, all subsequent characters + * are read until the first non-alphabetic or non-numeric character is + * encountered. The token type returned is TT_WORD and the value parsed + * is stored in sval. If lower case mode is set, the token + * stored in sval is converted to lower case. The end of line + * sequence terminates a word only if EOL signficance has been turned on. + * The start of a comment also terminates a word. Any character with a + * non-alphabetic and non-numeric attribute (such as white space, a quote, + * or a commet) are treated as non-alphabetic and terminate the word.
    • + *
  • If a comment character is parsed, then all remaining characters on + * the current line are skipped and another token is parsed. Any EOL or + * EOF's encountered are not discarded, but rather terminate the comment.
    • + *
  • If a quote character is parsed, then all characters up to the + * second occurrence of the same quote character are parsed into a + * String. This String is stored as + * sval, but is not converted to lower case, even if lower case + * mode is enabled. The token type returned is the value of the quote + * character encountered. Any escape sequences + * (\b (backspace), \t (HTAB), \n (linefeed), \f (form feed), \r + * (carriage return), \" (double quote), \' (single quote), \\ + * (backslash), \XXX (octal esacpe)) are converted to the appropriate + * char values. Invalid esacape sequences are left in untranslated. + * Unicode characters like ('\ u0000') are not recognized.
    • + *
  • If the C++ comment sequence "//" is encountered, and the parser + * is configured to handle that sequence, then the remainder of the line + * is skipped and another token is read exactly as if a character with + * the comment attribute was encountered.
    • + *
  • If the C comment sequence "/*" is encountered, and the parser + * is configured to handle that sequence, then all characters up to and + * including the comment terminator sequence are discarded and another + * token is parsed.
    • + *
  • If all cases above are not met, then the character is an ordinary + * character that is parsed as a token by itself. The char encountered + * is returned as the token type.
    • + *
+ * + * @return The token type + * @exception IOException If an I/O error occurs + */ + public int nextToken() throws IOException + { + if (pushedBack) + { + pushedBack = false; + if (ttype != TT_NONE) + return ttype; + } + + sval = null; + int ch; + + // Skip whitespace. Deal with EOL along the way. + while (isWhitespace(ch = in.read())) + if (ch == '\n' || ch == '\r') + { + lineNumber++; + + // Throw away \n if in combination with \r. + if (ch == '\r' && (ch = in.read()) != '\n') + { + if (ch != TT_EOF) + in.unread(ch); + } + if (eolSignificant) + return (ttype = TT_EOL); + } + + if (ch == '/') + if ((ch = in.read()) == '/' && slashSlash) + { + while ((ch = in.read()) != '\n' && ch != '\r' && ch != TT_EOF) + ; + + if (ch != TT_EOF) + in.unread(ch); + return nextToken(); // Recursive, but not too deep in normal cases + } + else if (ch == '*' && slashStar) + { + while (true) + { + ch = in.read(); + if (ch == '*') + { + if ((ch = in.read()) == '/') + break; + else if (ch != TT_EOF) + in.unread(ch); + } + else if (ch == '\n' || ch == '\r') + { + lineNumber++; + if (ch == '\r' && (ch = in.read()) != '\n') + { + if (ch != TT_EOF) + in.unread(ch); + } + } + else if (ch == TT_EOF) + { + break; + } + } + return nextToken(); // Recursive, but not too deep in normal cases + } + else + { + if (ch != TT_EOF) + in.unread(ch); + ch = '/'; + } + + if (ch == TT_EOF) + ttype = TT_EOF; + else if (isNumeric(ch)) + { + boolean isNegative = false; + if (ch == '-') + { + // Read ahead to see if this is an ordinary '-' rather than numeric. + ch = in.read(); + if (isNumeric(ch) && ch != '-') + { + isNegative = true; + } + else + { + if (ch != TT_EOF) + in.unread(ch); + return (ttype = '-'); + } + } + + CPStringBuilder tokbuf = new CPStringBuilder(); + tokbuf.append((char) ch); + + int decCount = 0; + while (isNumeric(ch = in.read()) && ch != '-') + if (ch == '.' && decCount++ > 0) + break; + else + tokbuf.append((char) ch); + + if (ch != TT_EOF) + in.unread(ch); + ttype = TT_NUMBER; + try + { + nval = Double.valueOf(tokbuf.toString()).doubleValue(); + } + catch (NumberFormatException _) + { + nval = 0.0; + } + if (isNegative) + nval = -nval; + } + else if (isAlphabetic(ch)) + { + CPStringBuilder tokbuf = new CPStringBuilder(); + tokbuf.append((char) ch); + while (isAlphabetic(ch = in.read()) || isNumeric(ch)) + tokbuf.append((char) ch); + if (ch != TT_EOF) + in.unread(ch); + ttype = TT_WORD; + sval = tokbuf.toString(); + if (lowerCase) + sval = sval.toLowerCase(); + } + else if (isComment(ch)) + { + while ((ch = in.read()) != '\n' && ch != '\r' && ch != TT_EOF) + ; + + if (ch != TT_EOF) + in.unread(ch); + return nextToken(); // Recursive, but not too deep in normal cases. + } + else if (isQuote(ch)) + { + ttype = ch; + CPStringBuilder tokbuf = new CPStringBuilder(); + while ((ch = in.read()) != ttype && ch != '\n' && ch != '\r' && + ch != TT_EOF) + { + if (ch == '\\') + switch (ch = in.read()) + { + case 'a': ch = 0x7; + break; + case 'b': ch = '\b'; + break; + case 'f': ch = 0xC; + break; + case 'n': ch = '\n'; + break; + case 'r': ch = '\r'; + break; + case 't': ch = '\t'; + break; + case 'v': ch = 0xB; + break; + case '\n': ch = '\n'; + break; + case '\r': ch = '\r'; + break; + case '\"': + case '\'': + case '\\': + break; + default: + int ch1, nextch; + if ((nextch = ch1 = ch) >= '0' && ch <= '7') + { + ch -= '0'; + if ((nextch = in.read()) >= '0' && nextch <= '7') + { + ch = ch * 8 + nextch - '0'; + if ((nextch = in.read()) >= '0' && nextch <= '7' && + ch1 >= '0' && ch1 <= '3') + { + ch = ch * 8 + nextch - '0'; + nextch = in.read(); + } + } + } + + if (nextch != TT_EOF) + in.unread(nextch); + } + + tokbuf.append((char) ch); + } + + // Throw away matching quote char. + if (ch != ttype && ch != TT_EOF) + in.unread(ch); + + sval = tokbuf.toString(); + } + else + { + ttype = ch; + } + + return ttype; + } + + private void resetChar(int ch) + { + whitespace[ch] = alphabetic[ch] = numeric[ch] = quote[ch] = comment[ch] = + false; + } + + /** + * This method makes the specified character an ordinary character. This + * means that none of the attributes (whitespace, alphabetic, numeric, + * quote, or comment) will be set on this character. This character will + * parse as its own token. + * + * @param ch The character to make ordinary, passed as an int + */ + public void ordinaryChar(int ch) + { + if (ch >= 0 && ch <= 255) + resetChar(ch); + } + + /** + * This method makes all the characters in the specified range, range + * terminators included, ordinary. This means the none of the attributes + * (whitespace, alphabetic, numeric, quote, or comment) will be set on + * any of the characters in the range. This makes each character in this + * range parse as its own token. + * + * @param low The low end of the range of values to set the whitespace + * attribute for + * @param hi The high end of the range of values to set the whitespace + * attribute for + */ + public void ordinaryChars(int low, int hi) + { + if (low < 0) + low = 0; + if (hi > 255) + hi = 255; + for (int i = low; i <= hi; i++) + resetChar(i); + } + + /** + * This method sets the numeric attribute on the characters '0' - '9' and + * the characters '.' and '-'. + * When this method is used, the result of giving other attributes + * (whitespace, quote, or comment) to the numeric characters may + * vary depending on the implementation. For example, if + * parseNumbers() and then whitespaceChars('1', '1') are called, + * this implementation reads "121" as 2, while some other implementation + * will read it as 21. + */ + public void parseNumbers() + { + for (int i = 0; i <= 9; i++) + numeric['0' + i] = true; + + numeric['.'] = true; + numeric['-'] = true; + } + + /** + * Puts the current token back into the StreamTokenizer so + * nextToken will return the same value on the next call. + * May cause the lineno method to return an incorrect value + * if lineno is called before the next call to nextToken. + */ + public void pushBack() + { + pushedBack = true; + } + + /** + * This method sets the quote attribute on the specified character. + * Other attributes for the character are cleared. + * + * @param ch The character to set the quote attribute for, passed as an int. + */ + public void quoteChar(int ch) + { + if (ch >= 0 && ch <= 255) + { + quote[ch] = true; + comment[ch] = false; + whitespace[ch] = false; + alphabetic[ch] = false; + numeric[ch] = false; + } + } + + /** + * This method removes all attributes (whitespace, alphabetic, numeric, + * quote, and comment) from all characters. It is equivalent to calling + * ordinaryChars(0x00, 0xFF). + * + * @see #ordinaryChars(int, int) + */ + public void resetSyntax() + { + ordinaryChars(0x00, 0xFF); + } + + /** + * This method sets a flag that indicates whether or not "C++" language style + * comments ("//" comments through EOL ) are handled by the parser. + * If this is true commented out sequences are skipped and + * ignored by the parser. This defaults to false. + * + * @param flag true to recognized and handle "C++" style + * comments, false otherwise + */ + public void slashSlashComments(boolean flag) + { + slashSlash = flag; + } + + /** + * This method sets a flag that indicates whether or not "C" language style + * comments (with nesting not allowed) are handled by the parser. + * If this is true commented out sequences are skipped and + * ignored by the parser. This defaults to false. + * + * @param flag true to recognized and handle "C" style comments, + * false otherwise + */ + public void slashStarComments(boolean flag) + { + slashStar = flag; + } + + /** + * This method returns the current token value as a String in + * the form "Token[x], line n", where 'n' is the current line numbers and + * 'x' is determined as follows. + *

+ *

    + *
  • If no token has been read, then 'x' is "NOTHING" and 'n' is 0
    • + *
  • If ttype is TT_EOF, then 'x' is "EOF"
    • + *
  • If ttype is TT_EOL, then 'x' is "EOL"
    • + *
  • If ttype is TT_WORD, then 'x' is sval
    • + *
  • If ttype is TT_NUMBER, then 'x' is "n=strnval" where + * 'strnval' is String.valueOf(nval).
    • + *
  • If ttype is a quote character, then 'x' is + * sval
    • + *
  • For all other cases, 'x' is ttype
    • + *
+ */ + public String toString() + { + String tempstr; + if (ttype == TT_EOF) + tempstr = "EOF"; + else if (ttype == TT_EOL) + tempstr = "EOL"; + else if (ttype == TT_WORD) + tempstr = sval; + else if (ttype == TT_NUMBER) + tempstr = "n=" + nval; + else if (ttype == TT_NONE) + tempstr = "NOTHING"; + else // must be an ordinary char. + tempstr = "\'" + (char) ttype + "\'"; + + return "Token[" + tempstr + "], line " + lineno(); + } + + /** + * This method sets the whitespace attribute for all characters in the + * specified range, range terminators included. + * + * @param low The low end of the range of values to set the whitespace + * attribute for + * @param hi The high end of the range of values to set the whitespace + * attribute for + */ + public void whitespaceChars(int low, int hi) + { + if (low < 0) + low = 0; + if (hi > 255) + hi = 255; + for (int i = low; i <= hi; i++) + { + resetChar(i); + whitespace[i] = true; + } + } + + /** + * This method sets the alphabetic attribute for all characters in the + * specified range, range terminators included. + * + * @param low The low end of the range of values to set the alphabetic + * attribute for + * @param hi The high end of the range of values to set the alphabetic + * attribute for + */ + public void wordChars(int low, int hi) + { + if (low < 0) + low = 0; + if (hi > 255) + hi = 255; + for (int i = low; i <= hi; i++) + alphabetic[i] = true; + } +} diff --git a/libjava/classpath/java/io/StringBufferInputStream.java b/libjava/classpath/java/io/StringBufferInputStream.java new file mode 100644 index 000000000..28405d938 --- /dev/null +++ b/libjava/classpath/java/io/StringBufferInputStream.java @@ -0,0 +1,187 @@ +/* StringBufferInputStream.java -- Read an String as a stream + Copyright (C) 1998, 1999, 2001, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * plus online API docs for JDK 1.2 beta from http://www.javasoft.com. + * Status: Believed complete and correct. Deprecated in JDK 1.1. + */ + +/** + * This class permits a String to be read as an input stream. + * The low eight bits of each character in the String are the + * bytes that are returned. The high eight bits of each character are + * discarded. + *

+ * The mark/reset functionality in this class behaves differently than + * normal. The mark() method is always ignored and the + * reset() method always resets in stream to start reading from + * position 0 in the String. Note that since this method does not override + * markSupported() in InputStream, calling that + * method will return false. + *

+ * Note that this class is deprecated because it does not properly handle + * 16-bit Java characters. It is provided for backwards compatibility only + * and should not be used for new development. The StringReader + * class should be used instead. + * + * @deprecated + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Warren Levy (warrenl@cygnus.com) + */ +public class StringBufferInputStream extends InputStream +{ + /** The String which is the input to this stream. */ + protected String buffer; + + /** Position of the next byte in buffer to be read. */ + protected int pos = 0; + + /** The length of the String buffer. */ + protected int count; + + /** + * Create a new StringBufferInputStream that will read bytes + * from the passed in String. This stream will read from the + * beginning to the end of the String. + * + * @param s The String this stream will read from. + */ + public StringBufferInputStream(String s) + { + buffer = s; + count = s.length(); + } + + /** + * This method returns the number of bytes available to be read from this + * stream. The value returned will be equal to count - pos. + * + * @return The number of bytes that can be read from this stream before + * blocking, which is all of them + */ + public int available() + { + return count - pos; + } + + /** + * This method reads one byte from the stream. The pos counter + * is advanced to the next byte to be read. The byte read is returned as + * an int in the range of 0-255. If the stream position is already at the + * end of the buffer, no byte is read and a -1 is returned in order to + * indicate the end of the stream. + * + * @return The byte read, or -1 if end of stream + */ + public int read() + { + if (pos >= count) + return -1; // EOF + + return ((int) buffer.charAt(pos++)) & 0xFF; + } + +/** + * This method reads bytes from the stream and stores them into a caller + * supplied buffer. It starts storing the data at index offset + * into the buffer and attempts to read len bytes. This method + * can return before reading the number of bytes requested if the end of the + * stream is encountered first. The actual number of bytes read is + * returned. If no bytes can be read because the stream is already at + * the end of stream position, a -1 is returned. + *

+ * This method does not block. + * + * @param b The array into which the bytes read should be stored. + * @param off The offset into the array to start storing bytes + * @param len The requested number of bytes to read + * + * @return The actual number of bytes read, or -1 if end of stream. + */ + public int read(byte[] b, int off, int len) + { + if (off < 0 || len < 0 || off + len > b.length) + throw new ArrayIndexOutOfBoundsException(); + + if (pos >= count) + return -1; // EOF + + int numRead = Math.min(len, count - pos); + if (numRead < 0) + return 0; + + buffer.getBytes(pos, pos + numRead, b, off); + pos += numRead; + return numRead; + } + + /** + * This method sets the read position in the stream to the beginning + * setting the pos variable equal to 0. Note that this differs + * from the common implementation of the reset() method. + */ + public void reset() + { + pos = 0; + } + + /** + * This method attempts to skip the requested number of bytes in the + * input stream. It does this by advancing the pos value by the + * specified number of bytes. It this would exceed the length of the + * buffer, then only enough bytes are skipped to position the stream at + * the end of the buffer. The actual number of bytes skipped is returned. + * + * @param n The requested number of bytes to skip + * + * @return The actual number of bytes skipped. + */ + public long skip(long n) + { + if (n < 0) + return 0L; + + long actualSkip = Math.min(n, count - pos); + pos += actualSkip; + return actualSkip; + } +} diff --git a/libjava/classpath/java/io/StringReader.java b/libjava/classpath/java/io/StringReader.java new file mode 100644 index 000000000..c4021a8fb --- /dev/null +++ b/libjava/classpath/java/io/StringReader.java @@ -0,0 +1,208 @@ +/* StringReader.java -- permits a String to be read as a character input stream + Copyright (C) 1998, 1999, 2000, 2003 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package java.io; + +/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 + * "The Java Language Specification", ISBN 0-201-63451-1 + * plus online API docs for JDK 1.2 beta from http://www.javasoft.com. + * Status: Believed complete and correct + */ + +/** + * This class permits a String to be read as a character + * input stream. + *

+ * The mark/reset functionality in this class behaves differently than + * normal. If no mark has been set, then calling the reset() + * method rewinds the read pointer to the beginning of the String. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Warren Levy (warrenl@cygnus.com) + * @date October 19, 1998. + */ +public class StringReader extends Reader +{ + /* A String provided by the creator of the stream. */ + private String buf; + + /* Position of the next char in buf to be read. */ + private int pos; + + /* The currently marked position in the stream. */ + private int markedPos; + + /* The index in buf one greater than the last valid character. */ + private int count; + + /** + * Create a new StringReader that will read chars from the + * passed in String. This stream will read from the beginning + * to the end of the String. + * + * @param buffer The String this stream will read from. + */ + public StringReader(String buffer) + { + super(); + buf = buffer; + + count = buffer.length(); + markedPos = pos = 0; + } + + public void close() + { + synchronized (lock) + { + buf = null; + } + } + + public void mark(int readAheadLimit) throws IOException + { + synchronized (lock) + { + if (buf == null) + throw new IOException("Stream closed"); + + // readAheadLimit is ignored per Java Class Lib. book, p. 1692. + markedPos = pos; + } + } + + public boolean markSupported() + { + return true; + } + + public int read() throws IOException + { + synchronized (lock) + { + if (buf == null) + throw new IOException("Stream closed"); + + if (pos < count) + return ((int) buf.charAt(pos++)) & 0xFFFF; + return -1; + } + } + + public int read(char[] b, int off, int len) throws IOException + { + synchronized (lock) + { + if (buf == null) + throw new IOException("Stream closed"); + + /* Don't need to check pos value, arraycopy will check it. */ + if (off < 0 || len < 0 || off + len > b.length) + throw new ArrayIndexOutOfBoundsException(); + + if (pos >= count) + return -1; + + int lastChar = Math.min(count, pos + len); + buf.getChars(pos, lastChar, b, off); + int numChars = lastChar - pos; + pos = lastChar; + return numChars; + } + } + + /** + * This method determines if the stream is ready to be read. This class + * is always ready to read and so always returns true, unless + * close() has previously been called in which case an IOException is + * thrown. + * + * @return true to indicate that this object is ready to be read. + * @exception IOException If the stream is closed. + */ + public boolean ready() throws IOException + { + if (buf == null) + throw new IOException("Stream closed"); + + return true; + } + + /** + * Sets the read position in the stream to the previously + * marked position or to 0 (i.e., the beginning of the stream) if the mark + * has not already been set. + */ + public void reset() throws IOException + { + synchronized (lock) + { + if (buf == null) + throw new IOException("Stream closed"); + + pos = markedPos; + } + } + + /** + * This method attempts to skip the requested number of chars in the + * input stream. It does this by advancing the pos value by + * the specified number of chars. It this would exceed the length of the + * buffer, then only enough chars are skipped to position the stream at + * the end of the buffer. The actual number of chars skipped is returned. + * + * @param n The requested number of chars to skip + * + * @return The actual number of chars skipped. + */ + public long skip(long n) throws IOException + { + synchronized (lock) + { + if (buf == null) + throw new IOException("Stream closed"); + + // Even though the var numChars is a long, in reality it can never + // be larger than an int since the result of subtracting 2 positive + // ints will always fit in an int. Since we have to return a long + // anyway, numChars might as well just be a long. + long numChars = Math.min((long) (count - pos), n < 0 ? 0L : n); + pos += numChars; + return numChars; + } + } +} diff --git a/libjava/classpath/java/io/StringWriter.java b/libjava/classpath/java/io/StringWriter.java new file mode 100644 index 000000000..85500b5cb --- /dev/null +++ b/libjava/classpath/java/io/StringWriter.java @@ -0,0 +1,212 @@ +/* StringWriter.java -- Writes bytes to a StringBuffer + Copyright (C) 1998, 1999, 2000, 2001, 2003, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +// Wow is this a dumb class. CharArrayWriter can do all this and +// more. I would redirect all calls to one in fact, but the javadocs say +// use a StringBuffer so I will comply. + +/** + * This class writes chars to an internal StringBuffer that + * can then be used to retrieve a String. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + */ +public class StringWriter extends Writer +{ + /** + * This is the default size of the buffer if the user doesn't specify it. + * @specnote The JCL Volume 1 says that 16 is the default size. + */ + private static final int DEFAULT_BUFFER_SIZE = 16; + + /** + * This method closes the stream. The contents of the internal buffer + * can still be retrieved, but future writes are not guaranteed to work. + * + * @exception IOException If an error orrurs. + */ + public void close () throws IOException + { + // JCL says this does nothing. This seems to violate the Writer + // contract, in that other methods should still throw an + // IOException after a close. Still, we just follow JCL. + } + + /** + * This method flushes any buffered characters to the underlying output. + * It does nothing in this class. + */ + public void flush () + { + } + + /** + * This method returns the StringBuffer object that this + * object is writing to. Note that this is the actual internal buffer, so + * any operations performed on it will affect this stream object. + * + * @return The StringBuffer object being written to + */ + public StringBuffer getBuffer () + { + return buffer; + } + + /** + * This method initializes a new StringWriter to write to a + * StringBuffer initially sized to a default size of 16 + * chars. + */ + public StringWriter () + { + this (DEFAULT_BUFFER_SIZE); + } + + /** + * This method initializes a new StringWriter to write to a + * StringBuffer with the specified initial size. + * + * @param size The initial size to make the StringBuffer + */ + public StringWriter (int size) + { + super (); + buffer = new StringBuffer (size); + lock = buffer; + } + + /** + * This method returns the contents of the internal StringBuffer + * as a String. + * + * @return A String representing the chars written to + * this stream. + */ + public String toString () + { + return buffer.toString(); + } + + /** + * This method writes a single character to the output, storing it in + * the internal buffer. + * + * @param oneChar The char to write, passed as an int. + */ + public void write (int oneChar) + { + buffer.append((char) (oneChar & 0xFFFF)); + } + + /** + * This method writes len chars from the specified + * array starting at index offset in that array to this + * stream by appending the chars to the end of the internal buffer. + * + * @param chars The array of chars to write + * @param offset The index into the array to start writing from + * @param len The number of chars to write + */ + public void write (char[] chars, int offset, int len) + { + buffer.append(chars, offset, len); + } + + /** + * This method writes the characters in the specified String + * to the stream by appending them to the end of the internal buffer. + * + * @param str The String to write to the stream. + */ + public void write (String str) + { + buffer.append(str); + } + + /** + * This method writes out len characters of the specified + * String to the stream starting at character position + * offset into the stream. This is done by appending the + * characters to the internal buffer. + * + * @param str The String to write characters from + * @param offset The character position to start writing from + * @param len The number of characters to write. + */ + public void write (String str, int offset, int len) + { +// char[] tmpbuf = new char[len]; +// str.getChars(offset, offset+len, tmpbuf, 0); +// buf.append(tmpbuf, 0, tmpbuf.length); + // This implementation assumes that String.substring is more + // efficient than using String.getChars and copying the data + // twice. For libgcj, this is true. For Classpath, it is not. + // FIXME. + buffer.append(str.substring(offset, offset + len)); + } + + /** @since 1.5 */ + public StringWriter append(char c) + { + write(c); + return this; + } + + /** @since 1.5 */ + public StringWriter append(CharSequence cs) + { + write(cs == null ? "null" : cs.toString()); + return this; + } + + /** @since 1.5 */ + public StringWriter append(CharSequence cs, int start, int end) + { + write(cs == null ? "null" : cs.subSequence(start, end).toString()); + return this; + } + + /** + * This is the StringBuffer that we use to store bytes that + * are written. + */ + private StringBuffer buffer; +} diff --git a/libjava/classpath/java/io/SyncFailedException.java b/libjava/classpath/java/io/SyncFailedException.java new file mode 100644 index 000000000..c514c44f2 --- /dev/null +++ b/libjava/classpath/java/io/SyncFailedException.java @@ -0,0 +1,66 @@ +/* SyncFailedException.java -- a file sync failed + Copyright (C) 1998, 1999, 2001, 2002, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * Thrown when a file synchronization fails. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + * @see FileDescriptor#sync() + * @since 1.1 + * @status updated to 1.4 + */ +public class SyncFailedException extends IOException +{ + /** + * Compatible with JDK 1.1+. + */ + private static final long serialVersionUID = -2353342684412443330L; + + /** + * Create an exception with a descriptive error message. + * + * @param message the descriptive error message + */ + public SyncFailedException(String message) + { + super(message); + } +} // class SyncFailedException diff --git a/libjava/classpath/java/io/UTFDataFormatException.java b/libjava/classpath/java/io/UTFDataFormatException.java new file mode 100644 index 000000000..6bb76aebd --- /dev/null +++ b/libjava/classpath/java/io/UTFDataFormatException.java @@ -0,0 +1,74 @@ +/* UTFDataFormatException.java -- thrown on bad format in UTF data + Copyright (C) 1998, 1999, 2001, 2002, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * When reading a UTF string from an input stream, this exception is thrown + * to indicate that the data read is invalid. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Tom Tromey (tromey@cygnus.com) + * @see DataInput + * @see DataInputStream#readUTF(DataInput) + * @status updated to 1.4 + */ +public class UTFDataFormatException extends IOException +{ + /** + * Compatible with JDK 1.0+. + */ + private static final long serialVersionUID = 420743449228280612L; + + /** + * Create a new UTFDataFormatException without a descriptive error message. + */ + public UTFDataFormatException() + { + } + + /** + * Create a new UTFDataFormatException with a descriptive error message. + * + * @param message the descriptive error message + */ + public UTFDataFormatException(String message) + { + super(message); + } +} // class UTFDataFormatException diff --git a/libjava/classpath/java/io/UnsupportedEncodingException.java b/libjava/classpath/java/io/UnsupportedEncodingException.java new file mode 100644 index 000000000..597597563 --- /dev/null +++ b/libjava/classpath/java/io/UnsupportedEncodingException.java @@ -0,0 +1,73 @@ +/* UnsupportedEncodingException.java -- the requested encoding isn't supported + Copyright (C) 1998, 1999, 2001, 2002, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This exception is thrown when the requested character encoding is + * not supported. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Per Bothner (bothner@cygnus.com) + * @since 1.1 + * @status updated to 1.4 + */ +public class UnsupportedEncodingException extends IOException +{ + /** + * Compatible with JDK 1.1+. + */ + private static final long serialVersionUID = -4274276298326136670L; + + /** + * Create an exception without a descriptive error message. + */ + public UnsupportedEncodingException() + { + } + + /** + * Create an exception with a descriptive error message. + * + * @param message the descriptive error message + */ + public UnsupportedEncodingException(String message) + { + super(message); + } +} // class UnsupportedEncodingException diff --git a/libjava/classpath/java/io/WriteAbortedException.java b/libjava/classpath/java/io/WriteAbortedException.java new file mode 100644 index 000000000..f051dc975 --- /dev/null +++ b/libjava/classpath/java/io/WriteAbortedException.java @@ -0,0 +1,109 @@ +/* WriteAbortedException.java -- wraps an exception thrown while writing + Copyright (C) 1998, 2000, 2002, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/** + * This exception is thrown when another ObjectStreamException occurs during + * a serialization read or write. The stream is reset, and deserialized + * objects are discarded. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Eric Blake (ebb9@email.byu.edu) + * @since 1.1 + * @status updated to 1.4 + */ +public class WriteAbortedException extends ObjectStreamException +{ + /** + * Compatible with JDK 1.1+. + */ + private static final long serialVersionUID = -3326426625597282442L; + + /** + * The cause of this exception. This pre-dates the exception chaining + * of Throwable; and although you can change this field, you are wiser + * to leave it alone. + * + * @serial the exception cause + */ + public Exception detail; + + /** + * Create a new WriteAbortedException with a specified message and + * cause. + * + * @param msg the message + * @param detail the cause + */ + public WriteAbortedException(String msg, Exception detail) + { + super(msg); + initCause(detail); + this.detail = detail; + } + + /** + * This method returns a message indicating what went wrong, in this + * format: + * super.getMessage() + (detail == null ? "" : "; " + detail). + * + * @return the chained message + */ + public String getMessage() + { + if (detail == this || detail == null) + return super.getMessage(); + return super.getMessage() + "; " + detail; + } + + /** + * Returns the cause of this exception. Note that this may not be the + * original cause, thanks to the detail field being public + * and non-final (yuck). However, to avoid violating the contract of + * Throwable.getCause(), this returns null if detail == this, + * as no exception can be its own cause. + * + * @return the cause + * @since 1.4 + */ + public Throwable getCause() + { + return detail == this ? null : detail; + } +} // class WriteAbortedException diff --git a/libjava/classpath/java/io/Writer.java b/libjava/classpath/java/io/Writer.java new file mode 100644 index 000000000..5b3e7073a --- /dev/null +++ b/libjava/classpath/java/io/Writer.java @@ -0,0 +1,211 @@ +/* Writer.java -- Base class for character output streams + Copyright (C) 1998, 1999, 2001, 2003, 2004, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +/* Written using "Java Class Libraries", 2nd edition, plus online + * API docs for JDK 1.2 beta from http://www.javasoft.com. + * Status: Believed complete and correct. + */ + +/** + * This abstract class forms the base of the hierarchy of classes that + * write output as a stream of chars. It provides a common set of methods + * for writing chars to stream. Subclasses implement and/or extend these + * methods to write chars in a particular manner or to a particular + * destination such as a file on disk or network connection. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Per Bothner (bothner@cygnus.com) + */ +public abstract class Writer implements Appendable, Closeable, Flushable +{ + /** + * This is the object used to synchronize criticial code sections for + * thread safety. Subclasses should use this field instead of using + * synchronized methods or explicity synchronizations on this + */ + protected Object lock; + + /** + * This is the default no-argument constructor for this class. This method + * will set up the class to synchronize criticial sections on itself. + */ + protected Writer() + { + lock = this; + } + + /** + * This method initializes a Writer that will synchronize + * on the specified Object. + * + * @param lock The Object to use for synchronizing critical + * sections. Must not be null. + */ + protected Writer(Object lock) + { + if (lock == null) + throw new NullPointerException(); + + this.lock = lock; + } + + /** + * This method forces any data that may have been buffered to be written + * to the underlying output device. Please note that the host environment + * might perform its own buffering unbeknowst to Java. In that case, a + * write made (for example, to a disk drive) might be cached in OS + * buffers instead of actually being written to disk. + * + * @exception IOException If an error occurs + */ + public abstract void flush() throws IOException; + + /** + * This method closes the stream. Any internal or native resources + * associated + * with this stream are freed. Any subsequent attempt to access the stream + * might throw an exception. + *

+ * This method in this class does nothing. + * + * @exception IOException If an error occurs + */ + public abstract void close() throws IOException; + + /** + * This method writes a single char to the output stream. + * + * @param b The char to be written to the output stream, passed as an int + * + * @exception IOException If an error occurs + */ + public void write(int b) throws IOException + { + char[] buf = new char[1]; + + buf[0] = (char)b; + write(buf, 0, buf.length); + } + + /** + * This method all the writes char from the passed array to the output + * stream. This method is equivalent to + * write(buf, 0, buf.length) which + * is exactly how it is implemented in this class. + * + * @param buf The array of char to write + * + * @exception IOException If an error occurs + */ + public void write(char[] buf) throws IOException + { + write(buf, 0, buf.length); + } + + /** + * This method writes len char from the specified array + * buf starting at index offset into the array. + *

+ * Subclasses must provide an implementation of this abstract method. + * + * @param buf The array of char to write from + * @param offset The index into the array to start writing from + * @param len The number of char to write + * + * @exception IOException If an error occurs + */ + public abstract void write(char[] buf, int offset, int len) + throws IOException; + + /** + * This method writes all the characters in a String to the + * output. + * + * @param str The String whose chars are to be written. + * + * @exception IOException If an error occurs + */ + public void write(String str) throws IOException + { + write(str, 0, str.length()); + } + + /** + * This method writes len chars from the String + * starting at position offset. + * + * @param str The String that is to be written + * @param offset The character offset into the String to start + * writing from + * @param len The number of chars to write + * + * @exception IOException If an error occurs + */ + public void write(String str, int offset, int len) throws IOException + { + // FIXME - for libgcj re-write using native code to not require + // copied buffer. + char[] buf = new char[len]; + + str.getChars(offset, offset + len, buf, 0); + write(buf, 0, len); + } + + /** @since 1.5 */ + public Writer append(char c) throws IOException + { + write(c); + return this; + } + + /** @since 1.5 */ + public Writer append(CharSequence cs) throws IOException + { + write(cs == null ? "null" : cs.toString()); + return this; + } + + /** @since 1.5 */ + public Writer append(CharSequence cs, int start, int end) throws IOException + { + write(cs == null ? "null" : cs.subSequence(start, end).toString()); + return this; + } +} diff --git a/libjava/classpath/java/io/package.html b/libjava/classpath/java/io/package.html new file mode 100644 index 000000000..02e1c5bc3 --- /dev/null +++ b/libjava/classpath/java/io/package.html @@ -0,0 +1,46 @@ + + + + +GNU Classpath - java.io + + +

Classes for manipulating character and byte streams and files.

+ + + -- cgit v1.2.3