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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/util/zip/ZipEntry.java
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+/* ZipEntry.java --
+ Copyright (C) 2001, 2002, 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.util.zip;
+
+import java.util.Calendar;
+
+/**
+ * This class represents a member of a zip archive. ZipFile and
+ * ZipInputStream will give you instances of this class as information
+ * about the members in an archive. On the other hand ZipOutputStream
+ * needs an instance of this class to create a new member.
+ *
+ * @author Jochen Hoenicke
+ */
+public class ZipEntry implements ZipConstants, Cloneable
+{
+ private static final byte KNOWN_SIZE = 1;
+ private static final byte KNOWN_CSIZE = 2;
+ private static final byte KNOWN_CRC = 4;
+ private static final byte KNOWN_TIME = 8;
+ private static final byte KNOWN_DOSTIME = 16;
+ private static final byte KNOWN_EXTRA = 32;
+
+ /** Immutable name of the entry */
+ private final String name;
+ /** Uncompressed size */
+ private int size;
+ /** Compressed size */
+ private long compressedSize = -1;
+ /** CRC of uncompressed data */
+ private int crc;
+ /** Comment or null if none */
+ private String comment = null;
+ /** The compression method. Either DEFLATED or STORED, by default -1. */
+ private byte method = -1;
+ /** Flags specifying what we know about this entry */
+ private byte known = 0;
+ /**
+ * The 32bit DOS encoded format for the time of this entry. Only valid if
+ * KNOWN_DOSTIME is set in known.
+ */
+ private int dostime;
+ /**
+ * The 64bit Java encoded millisecond time since the beginning of the epoch.
+ * Only valid if KNOWN_TIME is set in known.
+ */
+ private long time;
+ /** Extra data */
+ private byte[] extra = null;
+
+ int flags; /* used by ZipOutputStream */
+ int offset; /* used by ZipFile and ZipOutputStream */
+
+ /**
+ * Compression method. This method doesn't compress at all.
+ */
+ public static final int STORED = 0;
+ /**
+ * Compression method. This method uses the Deflater.
+ */
+ public static final int DEFLATED = 8;
+
+ /**
+ * Creates a zip entry with the given name.
+ * @param name the name. May include directory components separated
+ * by '/'.
+ *
+ * @exception NullPointerException when name is null.
+ * @exception IllegalArgumentException when name is bigger then 65535 chars.
+ */
+ public ZipEntry(String name)
+ {
+ int length = name.length();
+ if (length > 65535)
+ throw new IllegalArgumentException("name length is " + length);
+ this.name = name;
+ }
+
+ /**
+ * Creates a copy of the given zip entry.
+ * @param e the entry to copy.
+ */
+ public ZipEntry(ZipEntry e)
+ {
+ this(e, e.name);
+ }
+
+ ZipEntry(ZipEntry e, String name)
+ {
+ this.name = name;
+ known = e.known;
+ size = e.size;
+ compressedSize = e.compressedSize;
+ crc = e.crc;
+ dostime = e.dostime;
+ time = e.time;
+ method = e.method;
+ extra = e.extra;
+ comment = e.comment;
+ }
+
+ final void setDOSTime(int dostime)
+ {
+ this.dostime = dostime;
+ known |= KNOWN_DOSTIME;
+ known &= ~KNOWN_TIME;
+ }
+
+ final int getDOSTime()
+ {
+ if ((known & KNOWN_DOSTIME) != 0)
+ return dostime;
+ else if ((known & KNOWN_TIME) != 0)
+ {
+ Calendar cal = Calendar.getInstance();
+ cal.setTimeInMillis(time);
+ dostime = (cal.get(Calendar.YEAR) - 1980 & 0x7f) << 25
+ | (cal.get(Calendar.MONTH) + 1) << 21
+ | (cal.get(Calendar.DAY_OF_MONTH)) << 16
+ | (cal.get(Calendar.HOUR_OF_DAY)) << 11
+ | (cal.get(Calendar.MINUTE)) << 5
+ | (cal.get(Calendar.SECOND)) >> 1;
+ known |= KNOWN_DOSTIME;
+ return dostime;
+ }
+ else
+ return 0;
+ }
+
+ /**
+ * Creates a copy of this zip entry.
+ */
+ public Object clone()
+ {
+ // JCL defines this as being the same as the copy constructor above,
+ // except that value of the "extra" field is also copied. Take care
+ // that in the case of a subclass we use clone() rather than the copy
+ // constructor.
+ ZipEntry clone;
+ if (this.getClass() == ZipEntry.class)
+ clone = new ZipEntry(this);
+ else
+ {
+ try
+ {
+ clone = (ZipEntry) super.clone();
+ }
+ catch (CloneNotSupportedException e)
+ {
+ throw new InternalError();
+ }
+ }
+ if (extra != null)
+ {
+ clone.extra = new byte[extra.length];
+ System.arraycopy(extra, 0, clone.extra, 0, extra.length);
+ }
+ return clone;
+ }
+
+ /**
+ * Returns the entry name. The path components in the entry are
+ * always separated by slashes ('/').
+ */
+ public String getName()
+ {
+ return name;
+ }
+
+ /**
+ * Sets the time of last modification of the entry.
+ * @time the time of last modification of the entry.
+ */
+ public void setTime(long time)
+ {
+ this.time = time;
+ this.known |= KNOWN_TIME;
+ this.known &= ~KNOWN_DOSTIME;
+ }
+
+ /**
+ * Gets the time of last modification of the entry.
+ * @return the time of last modification of the entry, or -1 if unknown.
+ */
+ public long getTime()
+ {
+ // The extra bytes might contain the time (posix/unix extension)
+ parseExtra();
+
+ if ((known & KNOWN_TIME) != 0)
+ return time;
+ else if ((known & KNOWN_DOSTIME) != 0)
+ {
+ int sec = 2 * (dostime & 0x1f);
+ int min = (dostime >> 5) & 0x3f;
+ int hrs = (dostime >> 11) & 0x1f;
+ int day = (dostime >> 16) & 0x1f;
+ int mon = ((dostime >> 21) & 0xf) - 1;
+ int year = ((dostime >> 25) & 0x7f) + 1980; /* since 1900 */
+
+ try
+ {
+ Calendar cal = Calendar.getInstance();
+ cal.set(year, mon, day, hrs, min, sec);
+ time = cal.getTimeInMillis();
+ known |= KNOWN_TIME;
+ return time;
+ }
+ catch (RuntimeException ex)
+ {
+ /* Ignore illegal time stamp */
+ known &= ~KNOWN_TIME;
+ return -1;
+ }
+ }
+ else
+ return -1;
+ }
+
+ /**
+ * Sets the size of the uncompressed data.
+ * @exception IllegalArgumentException if size is not in 0..0xffffffffL
+ */
+ public void setSize(long size)
+ {
+ if ((size & 0xffffffff00000000L) != 0)
+ throw new IllegalArgumentException();
+ this.size = (int) size;
+ this.known |= KNOWN_SIZE;
+ }
+
+ /**
+ * Gets the size of the uncompressed data.
+ * @return the size or -1 if unknown.
+ */
+ public long getSize()
+ {
+ return (known & KNOWN_SIZE) != 0 ? size & 0xffffffffL : -1L;
+ }
+
+ /**
+ * Sets the size of the compressed data.
+ */
+ public void setCompressedSize(long csize)
+ {
+ this.compressedSize = csize;
+ }
+
+ /**
+ * Gets the size of the compressed data.
+ * @return the size or -1 if unknown.
+ */
+ public long getCompressedSize()
+ {
+ return compressedSize;
+ }
+
+ /**
+ * Sets the crc of the uncompressed data.
+ * @exception IllegalArgumentException if crc is not in 0..0xffffffffL
+ */
+ public void setCrc(long crc)
+ {
+ if ((crc & 0xffffffff00000000L) != 0)
+ throw new IllegalArgumentException();
+ this.crc = (int) crc;
+ this.known |= KNOWN_CRC;
+ }
+
+ /**
+ * Gets the crc of the uncompressed data.
+ * @return the crc or -1 if unknown.
+ */
+ public long getCrc()
+ {
+ return (known & KNOWN_CRC) != 0 ? crc & 0xffffffffL : -1L;
+ }
+
+ /**
+ * Sets the compression method. Only DEFLATED and STORED are
+ * supported.
+ * @exception IllegalArgumentException if method is not supported.
+ * @see ZipOutputStream#DEFLATED
+ * @see ZipOutputStream#STORED
+ */
+ public void setMethod(int method)
+ {
+ if (method != ZipOutputStream.STORED
+ && method != ZipOutputStream.DEFLATED)
+ throw new IllegalArgumentException();
+ this.method = (byte) method;
+ }
+
+ /**
+ * Gets the compression method.
+ * @return the compression method or -1 if unknown.
+ */
+ public int getMethod()
+ {
+ return method;
+ }
+
+ /**
+ * Sets the extra data.
+ * @exception IllegalArgumentException if extra is longer than 0xffff bytes.
+ */
+ public void setExtra(byte[] extra)
+ {
+ if (extra == null)
+ {
+ this.extra = null;
+ return;
+ }
+ if (extra.length > 0xffff)
+ throw new IllegalArgumentException();
+ this.extra = extra;
+ }
+
+ private void parseExtra()
+ {
+ // Already parsed?
+ if ((known & KNOWN_EXTRA) != 0)
+ return;
+
+ if (extra == null)
+ {
+ known |= KNOWN_EXTRA;
+ return;
+ }
+
+ try
+ {
+ int pos = 0;
+ while (pos < extra.length)
+ {
+ int sig = (extra[pos++] & 0xff)
+ | (extra[pos++] & 0xff) << 8;
+ int len = (extra[pos++] & 0xff)
+ | (extra[pos++] & 0xff) << 8;
+ if (sig == 0x5455)
+ {
+ /* extended time stamp */
+ int flags = extra[pos];
+ if ((flags & 1) != 0)
+ {
+ long time = ((extra[pos+1] & 0xff)
+ | (extra[pos+2] & 0xff) << 8
+ | (extra[pos+3] & 0xff) << 16
+ | (extra[pos+4] & 0xff) << 24);
+ setTime(time*1000);
+ }
+ }
+ pos += len;
+ }
+ }
+ catch (ArrayIndexOutOfBoundsException ex)
+ {
+ /* be lenient */
+ }
+
+ known |= KNOWN_EXTRA;
+ return;
+ }
+
+ /**
+ * Gets the extra data.
+ * @return the extra data or null if not set.
+ */
+ public byte[] getExtra()
+ {
+ return extra;
+ }
+
+ /**
+ * Sets the entry comment.
+ * @exception IllegalArgumentException if comment is longer than 0xffff.
+ */
+ public void setComment(String comment)
+ {
+ if (comment != null && comment.length() > 0xffff)
+ throw new IllegalArgumentException();
+ this.comment = comment;
+ }
+
+ /**
+ * Gets the comment.
+ * @return the comment or null if not set.
+ */
+ public String getComment()
+ {
+ return comment;
+ }
+
+ /**
+ * Gets true, if the entry is a directory. This is solely
+ * determined by the name, a trailing slash '/' marks a directory.
+ */
+ public boolean isDirectory()
+ {
+ int nlen = name.length();
+ return nlen > 0 && name.charAt(nlen - 1) == '/';
+ }
+
+ /**
+ * Gets the string representation of this ZipEntry. This is just
+ * the name as returned by getName().
+ */
+ public String toString()
+ {
+ return name;
+ }
+
+ /**
+ * Gets the hashCode of this ZipEntry. This is just the hashCode
+ * of the name. Note that the equals method isn't changed, though.
+ */
+ public int hashCode()
+ {
+ return name.hashCode();
+ }
+}