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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/xml/stream/XMLStreamWriterImpl.java | |
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Diffstat (limited to 'libjava/classpath/gnu/xml/stream/XMLStreamWriterImpl.java')
-rw-r--r-- | libjava/classpath/gnu/xml/stream/XMLStreamWriterImpl.java | 1016 |
1 files changed, 1016 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/xml/stream/XMLStreamWriterImpl.java b/libjava/classpath/gnu/xml/stream/XMLStreamWriterImpl.java new file mode 100644 index 000000000..83b8f7239 --- /dev/null +++ b/libjava/classpath/gnu/xml/stream/XMLStreamWriterImpl.java @@ -0,0 +1,1016 @@ +/* XMLStreamWriterImpl.java -- + Copyright (C) 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 gnu.xml.stream; + +import java.io.IOException; +import java.io.Writer; +import java.util.Enumeration; +import java.util.HashSet; +import java.util.LinkedList; +import java.util.Set; + +import javax.xml.XMLConstants; +import javax.xml.namespace.NamespaceContext; +import javax.xml.stream.XMLStreamException; +import javax.xml.stream.XMLStreamWriter; + +import org.xml.sax.helpers.NamespaceSupport; + +/** + * Simple XML stream writer. + * + * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> + */ +public class XMLStreamWriterImpl + implements XMLStreamWriter +{ + + /** + * The underlying character stream to write to. + */ + protected final Writer writer; + + /** + * The encoding being used. + * Note that this must match the encoding of the character stream. + */ + protected final String encoding; + + /** + * Whether prefix defaulting is being used. + * If true and a prefix has not been defined for a namespace specified on + * an element or an attribute, a new prefix and namespace declaration will + * be created. + */ + protected final boolean prefixDefaulting; + + /** + * The namespace context used to determine the namespace-prefix mappings + * in scope. + */ + protected NamespaceContext namespaceContext; + + /** + * The stack of elements in scope. + * Used to close the remaining elements. + */ + private LinkedList elements; + + /** + * Whether a start element has been opened but not yet closed. + */ + private boolean inStartElement; + + /** + * Whether we are in an empty element. + */ + private boolean emptyElement; + + private NamespaceSupport namespaces; + private int count = 0; + + private boolean xml11; + private boolean hasXML11RestrictedChars; + + /** + * Constructor. + * @see #writer + * @see #encoding + * @see #prefixDefaulting + */ + protected XMLStreamWriterImpl(Writer writer, String encoding, + boolean prefixDefaulting) + { + this.writer = writer; + this.encoding = encoding; + this.prefixDefaulting = prefixDefaulting; + elements = new LinkedList(); + namespaces = new NamespaceSupport(); + } + + /** + * Write the end of a start-element event. + * This will close the element if it was defined to be an empty element. + */ + private void endStartElement() + throws IOException + { + if (!inStartElement) + return; + if (emptyElement) + { + writer.write('/'); + elements.removeLast(); + namespaces.popContext(); + emptyElement = false; + } + writer.write('>'); + inStartElement = false; + } + + public void writeStartElement(String localName) + throws XMLStreamException + { + try + { + if (!isName(localName)) + throw new IllegalArgumentException("illegal Name: " + localName); + + endStartElement(); + namespaces.pushContext(); + + writer.write('<'); + writer.write(localName); + + elements.addLast(new String[] { null, localName }); + inStartElement = true; + } + catch (IOException e) + { + XMLStreamException e2 = new XMLStreamException(e); + e2.initCause(e); + throw e2; + } + } + + public void writeStartElement(String namespaceURI, String localName) + throws XMLStreamException + { + try + { + if (namespaceURI != null && !isURI(namespaceURI)) + throw new IllegalArgumentException("illegal URI: " + namespaceURI); + if (!isName(localName)) + throw new IllegalArgumentException("illegal Name: " + localName); + + endStartElement(); + namespaces.pushContext(); + + String prefix = getPrefix(namespaceURI); + boolean isDeclared = (prefix != null); + if (!isDeclared) + { + if (prefixDefaulting) + prefix = createPrefix(namespaceURI); + else + throw new XMLStreamException("namespace " + namespaceURI + + " has not been declared"); + } + writer.write('<'); + if (!"".equals(prefix)) + { + writer.write(prefix); + writer.write(':'); + } + writer.write(localName); + inStartElement = true; + if (!isDeclared) + { + writeNamespaceImpl(prefix, namespaceURI); + } + + elements.addLast(new String[] { prefix, localName }); + } + catch (IOException e) + { + XMLStreamException e2 = new XMLStreamException(e); + e2.initCause(e); + throw e2; + } + } + + /** + * Creates a new unique prefix in the document. + * Subclasses may override this method to provide a suitably unique prefix + * for the given namespace. + * @param namespaceURI the namespace URI + */ + protected String createPrefix(String namespaceURI) + { + Set prefixes = new HashSet(); + for (Enumeration e = namespaces.getPrefixes(); e.hasMoreElements(); ) + prefixes.add(e.nextElement()); + String ret; + do + { + ret = "ns" + (count++); + } + while (prefixes.contains(ret)); + return ret; + } + + public void writeStartElement(String prefix, String localName, + String namespaceURI) + throws XMLStreamException + { + try + { + if (namespaceURI != null && !isURI(namespaceURI)) + throw new IllegalArgumentException("illegal URI: " + namespaceURI); + if (prefix != null && !isPrefix(prefix)) + throw new IllegalArgumentException("illegal NCName: " + prefix); + if (!isNCName(localName)) + throw new IllegalArgumentException("illegal NCName: " + localName); + + endStartElement(); + namespaces.pushContext(); + + String currentPrefix = getPrefix(namespaceURI); + boolean isCurrent = prefix.equals(currentPrefix); + writer.write('<'); + if (!"".equals(prefix)) + { + writer.write(prefix); + writer.write(':'); + } + writer.write(localName); + if (prefixDefaulting && !isCurrent) + { + writeNamespaceImpl(prefix, namespaceURI); + } + + elements.addLast(new String[] { prefix, localName }); + inStartElement = true; + } + catch (IOException e) + { + XMLStreamException e2 = new XMLStreamException(e); + e2.initCause(e); + throw e2; + } + } + + public void writeEmptyElement(String namespaceURI, String localName) + throws XMLStreamException + { + writeStartElement(namespaceURI, localName); + emptyElement = true; + } + + public void writeEmptyElement(String prefix, String localName, + String namespaceURI) + throws XMLStreamException + { + writeStartElement(prefix, localName, namespaceURI); + emptyElement = true; + } + + public void writeEmptyElement(String localName) + throws XMLStreamException + { + writeStartElement(localName); + emptyElement = true; + } + + public void writeEndElement() + throws XMLStreamException + { + if (elements.isEmpty()) + throw new IllegalStateException("no matching start element"); + try + { + endStartElement(); + String[] element = (String[]) elements.removeLast(); + namespaces.popContext(); + + writer.write('<'); + writer.write('/'); + if (element[0] != null && !"".equals(element[0])) + { + writer.write(element[0]); + writer.write(':'); + } + writer.write(element[1]); + writer.write('>'); + } + catch (IOException e) + { + XMLStreamException e2 = new XMLStreamException(e); + e2.initCause(e); + throw e2; + } + } + + public void writeEndDocument() + throws XMLStreamException + { + while (!elements.isEmpty()) + writeEndElement(); + } + + public void close() + throws XMLStreamException + { + flush(); + } + + public void flush() + throws XMLStreamException + { + try + { + writer.flush(); + } + catch (IOException e) + { + XMLStreamException e2 = new XMLStreamException(e); + e2.initCause(e); + throw e2; + } + } + + public void writeAttribute(String localName, String value) + throws XMLStreamException + { + if (!inStartElement) + throw new IllegalStateException(); + try + { + if (!isName(localName)) + throw new IllegalArgumentException("illegal Name: " + localName); + if (!isChars(value)) + throw new IllegalArgumentException("illegal character: " + value); + + writer.write(' '); + writer.write(localName); + writer.write('='); + writer.write('"'); + if (hasXML11RestrictedChars) + writeEncodedWithRestrictedChars(value, true); + else + writeEncoded(value, true); + writer.write('"'); + } + catch (IOException e) + { + XMLStreamException e2 = new XMLStreamException(e); + e2.initCause(e); + throw e2; + } + } + + public void writeAttribute(String prefix, String namespaceURI, + String localName, String value) + throws XMLStreamException + { + if (!inStartElement) + throw new IllegalStateException(); + try + { + if (namespaceURI != null && !isURI(namespaceURI)) + throw new IllegalArgumentException("illegal URI: " + namespaceURI); + if (prefix != null && !isPrefix(prefix)) + throw new IllegalArgumentException("illegal NCName: " + prefix); + if (!isNCName(localName)) + throw new IllegalArgumentException("illegal NCName: " + localName); + if (!isChars(value)) + throw new IllegalArgumentException("illegal character: " + value); + + String currentPrefix = getPrefix(namespaceURI); + if (currentPrefix == null) + { + if (prefixDefaulting) + writeNamespaceImpl(prefix, namespaceURI); + else + throw new XMLStreamException("namespace " + namespaceURI + + " is not bound"); + } + else if (!currentPrefix.equals(prefix)) + throw new XMLStreamException("namespace " + namespaceURI + + " is bound to prefix " + + currentPrefix); + writer.write(' '); + if (!"".equals(prefix)) + { + writer.write(prefix); + writer.write(':'); + } + writer.write(localName); + writer.write('='); + writer.write('"'); + if (hasXML11RestrictedChars) + writeEncodedWithRestrictedChars(value, true); + else + writeEncoded(value, true); + writer.write('"'); + } + catch (IOException e) + { + XMLStreamException e2 = new XMLStreamException(e); + e2.initCause(e); + throw e2; + } + } + + public void writeAttribute(String namespaceURI, String localName, + String value) + throws XMLStreamException + { + if (!inStartElement) + throw new IllegalStateException(); + try + { + if (namespaceURI != null && !isURI(namespaceURI)) + throw new IllegalArgumentException("illegal URI: " + namespaceURI); + if (!isName(localName)) + throw new IllegalArgumentException("illegal Name: " + localName); + if (!isChars(value)) + throw new IllegalArgumentException("illegal character: " + value); + + String prefix = getPrefix(namespaceURI); + if (prefix == null) + { + if (prefixDefaulting) + { + prefix = XMLConstants.DEFAULT_NS_PREFIX; + writeNamespaceImpl(prefix, namespaceURI); + } + else + throw new XMLStreamException("namespace " + namespaceURI + + " is not bound"); + } + writer.write(' '); + if (!"".equals(prefix)) + { + writer.write(prefix); + writer.write(':'); + } + writer.write(localName); + writer.write('='); + writer.write('"'); + if (hasXML11RestrictedChars) + writeEncodedWithRestrictedChars(value, true); + else + writeEncoded(value, true); + writer.write('"'); + } + catch (IOException e) + { + XMLStreamException e2 = new XMLStreamException(e); + e2.initCause(e); + throw e2; + } + } + + public void writeNamespace(String prefix, String namespaceURI) + throws XMLStreamException + { + if (prefix == null || "".equals(prefix) || "xmlns".equals(prefix)) + { + writeDefaultNamespace(namespaceURI); + return; + } + if (!inStartElement) + throw new IllegalStateException(); + try + { + if (!isURI(namespaceURI)) + throw new IllegalArgumentException("illegal URI: " + namespaceURI); + if (!isPrefix(prefix)) + throw new IllegalArgumentException("illegal NCName: " + prefix); + } + catch (IOException e) + { + XMLStreamException e2 = new XMLStreamException(e); + e2.initCause(e); + throw e2; + } + writeNamespaceImpl(prefix, namespaceURI); + } + + private void writeNamespaceImpl(String prefix, String namespaceURI) + throws XMLStreamException + { + try + { + if (prefix == null) + prefix = XMLConstants.DEFAULT_NS_PREFIX; + + setPrefix(prefix, namespaceURI); + + writer.write(' '); + writer.write("xmlns"); + if (!XMLConstants.DEFAULT_NS_PREFIX.equals(prefix)) + { + writer.write(':'); + writer.write(prefix); + } + writer.write('='); + writer.write('"'); + writer.write(namespaceURI); + writer.write('"'); + } + catch (IOException e) + { + XMLStreamException e2 = new XMLStreamException(e); + e2.initCause(e); + throw e2; + } + } + + public void writeDefaultNamespace(String namespaceURI) + throws XMLStreamException + { + if (!inStartElement) + throw new IllegalStateException(); + if (!isURI(namespaceURI)) + throw new IllegalArgumentException("illegal URI: " + namespaceURI); + writeNamespaceImpl(XMLConstants.DEFAULT_NS_PREFIX, namespaceURI); + } + + public void writeComment(String data) + throws XMLStreamException + { + if (data == null) + return; + try + { + if (!isChars(data)) + throw new IllegalArgumentException("illegal XML character: " + data); + if (data.indexOf("--") != -1) + throw new IllegalArgumentException("illegal comment: " + data); + + endStartElement(); + + writer.write("<!--"); + if (hasXML11RestrictedChars) + { + int[] seq = UnicodeReader.toCodePointArray(data); + for (int i = 0; i < seq.length; i++) + { + int c = seq[i]; + if (XMLParser.isXML11RestrictedChar(c)) + writer.write("&#x" + Integer.toHexString(c) + ";"); + else + writer.write(Character.toChars(i)); + } + } + else + writer.write(data); + writer.write("-->"); + } + catch (IOException e) + { + XMLStreamException e2 = new XMLStreamException(e); + e2.initCause(e); + throw e2; + } + } + + public void writeProcessingInstruction(String target) + throws XMLStreamException + { + writeProcessingInstruction(target, null); + } + + public void writeProcessingInstruction(String target, String data) + throws XMLStreamException + { + try + { + if (!isName(target) || "xml".equalsIgnoreCase(target)) + throw new IllegalArgumentException("illegal PITarget: " + target); + if (data != null && !isChars(data)) + throw new IllegalArgumentException("illegal XML character: " + data); + + endStartElement(); + + writer.write('<'); + writer.write('?'); + writer.write(target); + if (data != null) + { + writer.write(' '); + if (hasXML11RestrictedChars) + { + int[] seq = UnicodeReader.toCodePointArray(data); + for (int i = 0; i < seq.length; i++) + { + int c = seq[i]; + if (XMLParser.isXML11RestrictedChar(c)) + writer.write("&#x" + Integer.toHexString(c) + ";"); + else + writer.write(Character.toChars(i)); + } + } + else + writer.write(data); + } + writer.write('?'); + writer.write('>'); + } + catch (IOException e) + { + XMLStreamException e2 = new XMLStreamException(e); + e2.initCause(e); + throw e2; + } + } + + public void writeCData(String data) + throws XMLStreamException + { + try + { + if (!isChars(data) || hasXML11RestrictedChars) + throw new IllegalArgumentException("illegal XML character: " + data); + if (data.indexOf("]]") != -1) + throw new IllegalArgumentException("illegal CDATA section: " + data); + + endStartElement(); + + writer.write("<![CDATA["); + writer.write(data); + writer.write("]]>"); + } + catch (IOException e) + { + XMLStreamException e2 = new XMLStreamException(e); + e2.initCause(e); + throw e2; + } + } + + public void writeDTD(String dtd) + throws XMLStreamException + { + try + { + // XXX: Should we parse the doctypedecl at this point to ensure + // wellformedness? + writer.write("<!DOCTYPE "); + writer.write(dtd); + writer.write('>'); + } + catch (IOException e) + { + XMLStreamException e2 = new XMLStreamException(e); + e2.initCause(e); + throw e2; + } + } + + public void writeEntityRef(String name) + throws XMLStreamException + { + try + { + if (!isName(name)) + throw new IllegalArgumentException("illegal Name: " + name); + + endStartElement(); + + writer.write('&'); + writer.write(name); + writer.write(';'); + } + catch (IOException e) + { + XMLStreamException e2 = new XMLStreamException(e); + e2.initCause(e); + throw e2; + } + } + + public void writeStartDocument() + throws XMLStreamException + { + writeStartDocument(null, null); + } + + public void writeStartDocument(String version) + throws XMLStreamException + { + writeStartDocument(null, version); + } + + public void writeStartDocument(String encoding, String version) + throws XMLStreamException + { + if (version == null) + version = "1.0"; + else if ("1.1".equals(version)) + xml11 = true; + encoding = this.encoding; // YES: the parameter must be ignored + if (encoding == null) + encoding = "UTF-8"; + if (!"1.0".equals(version) && !"1.1".equals(version)) + throw new IllegalArgumentException(version); + try + { + writer.write("<?xml version=\""); + writer.write(version); + writer.write("\" encoding=\""); + writer.write(encoding); + writer.write("\"?>"); + writer.write(System.getProperty("line.separator")); + } + catch (IOException e) + { + XMLStreamException e2 = new XMLStreamException(e); + e2.initCause(e); + throw e2; + } + } + + public void writeCharacters(String text) + throws XMLStreamException + { + if (text == null) + return; + try + { + if (!isChars(text)) + throw new IllegalArgumentException("illegal XML character: " + text); + + endStartElement(); + + if (hasXML11RestrictedChars) + writeEncodedWithRestrictedChars(text, false); + else + writeEncoded(text, false); + } + catch (IOException e) + { + XMLStreamException e2 = new XMLStreamException(e); + e2.initCause(e); + throw e2; + } + } + + public void writeCharacters(char[] text, int start, int len) + throws XMLStreamException + { + writeCharacters(new String(text, start, len)); + } + + public String getPrefix(String uri) + throws XMLStreamException + { + String prefix = namespaces.getPrefix(uri); + if (prefix == null && namespaceContext != null) + prefix = namespaceContext.getPrefix(uri); + return prefix; + } + + public void setPrefix(String prefix, String uri) + throws XMLStreamException + { + try + { + if (!isURI(uri)) + throw new IllegalArgumentException("illegal URI: " + uri); + if (!isPrefix(prefix)) + throw new IllegalArgumentException("illegal NCName: " + prefix); + } + catch (IOException e) + { + XMLStreamException e2 = new XMLStreamException(e); + e2.initCause(e); + throw e2; + } + if (!namespaces.declarePrefix(prefix, uri)) + throw new XMLStreamException("illegal prefix " + prefix); + } + + public void setDefaultNamespace(String uri) + throws XMLStreamException + { + if (!isURI(uri)) + throw new IllegalArgumentException("illegal URI: " + uri); + if (!namespaces.declarePrefix(XMLConstants.DEFAULT_NS_PREFIX, uri)) + throw new XMLStreamException("illegal default namespace prefix"); + } + + public void setNamespaceContext(NamespaceContext context) + throws XMLStreamException + { + namespaceContext = context; + } + + public NamespaceContext getNamespaceContext() + { + return namespaceContext; + } + + public Object getProperty(String name) + throws IllegalArgumentException + { + throw new IllegalArgumentException(name); + } + + /** + * Write the specified text, ensuring that the content is suitably encoded + * for XML. + * @param text the text to write + * @param inAttr whether we are in an attribute value + */ + private void writeEncoded(String text, boolean inAttr) + throws IOException + { + char[] chars = text.toCharArray(); + int start = 0; + int end = chars.length; + int len = 0; + for (int i = start; i < end; i++) + { + char c = chars[i]; + if (c == '<' || c == '>' || c == '&') + { + writer.write(chars, start, len); + if (c == '<') + writer.write("<"); + else if (c == '>') + writer.write(">"); + else + writer.write("&"); + start = i + 1; + len = 0; + } + else if (inAttr && (c == '"' || c == '\'')) + { + writer.write(chars, start, len); + if (c == '"') + writer.write("""); + else + writer.write("'"); + start = i + 1; + len = 0; + } + else + len++; + } + if (len > 0) + writer.write(chars, start, len); + } + + /** + * Writes the specified text, in the knowledge that some of the + * characters are XML 1.1 restricted characters. + */ + private void writeEncodedWithRestrictedChars(String text, boolean inAttr) + throws IOException + { + int[] seq = UnicodeReader.toCodePointArray(text); + for (int i = 0; i < seq.length; i++) + { + int c = seq[i]; + switch (c) + { + case 0x3c: // '<' + writer.write("<"); + break; + case 0x3e: // '>' + writer.write(">"); + break; + case 0x26: // '&' + writer.write("&"); + break; + case 0x22: // '"' + if (inAttr) + writer.write("""); + else + writer.write(c); + break; + case 0x27: // '\'' + if (inAttr) + writer.write("'"); + else + writer.write(c); + break; + default: + if (XMLParser.isXML11RestrictedChar(c)) + writer.write("&#x" + Integer.toHexString(c) + ";"); + else + { + char[] chars = Character.toChars(c); + writer.write(chars, 0, chars.length); + } + } + } + } + + private boolean isName(String text) + throws IOException + { + if (text == null) + return false; + int[] seq = UnicodeReader.toCodePointArray(text); + if (seq.length < 1) + return false; + if (!XMLParser.isNameStartCharacter(seq[0], xml11)) + return false; + for (int i = 1; i < seq.length; i++) + { + if (!XMLParser.isNameCharacter(seq[i], xml11)) + return false; + } + return true; + } + + private boolean isPrefix(String text) + throws IOException + { + if (XMLConstants.DEFAULT_NS_PREFIX.equals(text)) { + return true; + } + return isNCName(text); + } + + private boolean isNCName(String text) + throws IOException + { + if (text == null) + return false; + int[] seq = UnicodeReader.toCodePointArray(text); + if (seq.length < 1) + return false; + if (!XMLParser.isNameStartCharacter(seq[0], xml11) || seq[0] == 0x3a) + return false; + for (int i = 1; i < seq.length; i++) + { + if (!XMLParser.isNameCharacter(seq[i], xml11) || seq[i] == 0x3a) + return false; + } + return true; + } + + private boolean isChars(String text) + throws IOException + { + if (text == null) + return false; + int[] seq = UnicodeReader.toCodePointArray(text); + hasXML11RestrictedChars = false; + if (xml11) + { + for (int i = 0; i < seq.length; i++) + { + if (!XMLParser.isXML11Char(seq[i])) + return false; + if (XMLParser.isXML11RestrictedChar(seq[i])) + hasXML11RestrictedChars = true; + } + } + else + { + for (int i = 0; i < seq.length; i++) + { + if (!XMLParser.isChar(seq[i])) + return false; + } + } + return true; + } + + private boolean isURI(String text) + { + if (text == null) + return false; + char[] chars = text.toCharArray(); + if (chars.length < 1) + return false; + for (int i = 0; i < chars.length; i++) + { + if (chars[i] < 0x20 || chars[i] >= 0x7f) + return false; + } + return true; + } + +} |