Java example source code file (XML11Serializer.java)
The XML11Serializer.java Java example source code
/*
* reserved comment block
* DO NOT REMOVE OR ALTER!
*/
/*
* Copyright 1999-2002,2004,2005 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// Sep 14, 2000:
// Fixed problem with namespace handling. Contributed by
// David Blondeau <blondeau@intalio.com>
// Sep 14, 2000:
// Fixed serializer to report IO exception directly, instead at
// the end of document processing.
// Reported by Patrick Higgins <phiggins@transzap.com>
// Aug 21, 2000:
// Fixed bug in startDocument not calling prepare.
// Reported by Mikael Staldal <d96-mst-ingen-reklam@d.kth.se>
// Aug 21, 2000:
// Added ability to omit DOCTYPE declaration.
package com.sun.org.apache.xml.internal.serialize;
import java.io.IOException;
import java.io.OutputStream;
import java.io.Writer;
import com.sun.org.apache.xerces.internal.dom.DOMMessageFormatter;
import com.sun.org.apache.xerces.internal.impl.Constants;
import com.sun.org.apache.xerces.internal.util.NamespaceSupport;
import com.sun.org.apache.xerces.internal.util.SymbolTable;
import com.sun.org.apache.xerces.internal.util.XML11Char;
import com.sun.org.apache.xerces.internal.util.XMLChar;
import org.xml.sax.SAXException;
import org.w3c.dom.DOMError;
/**
* Implements an XML serializer supporting both DOM and SAX pretty
* serializing. For usage instructions see {@link Serializer}.
* <p>
* If an output stream is used, the encoding is taken from the
* output format (defaults to <tt>UTF-8). If a writer is
* used, make sure the writer uses the same encoding (if applies)
* as specified in the output format.
* <p>
* The serializer supports both DOM and SAX. SAX serializing is done by firing
* SAX events and using the serializer as a document handler. DOM serializing is done
* by calling {@link #serialize(Document)} or by using DOM Level 3
* {@link org.w3c.dom.ls.DOMSerializer} and
* serializing with {@link org.w3c.dom.ls.DOMSerializer#write},
* {@link org.w3c.dom.ls.DOMSerializer#writeToString}.
* <p>
* If an I/O exception occurs while serializing, the serializer
* will not throw an exception directly, but only throw it
* at the end of serializing (either DOM or SAX's {@link
* org.xml.sax.DocumentHandler#endDocument}.
* <p>
* For elements that are not specified as whitespace preserving,
* the serializer will potentially break long text lines at space
* boundaries, indent lines, and serialize elements on separate
* lines. Line terminators will be regarded as spaces, and
* spaces at beginning of line will be stripped.
* @author <a href="mailto:arkin@intalio.com">Assaf Arkin
* @author <a href="mailto:rahul.srivastava@sun.com">Rahul Srivastava
* @author Elena Litani IBM
* @see Serializer
*/
public class XML11Serializer
extends XMLSerializer {
//
// constants
//
protected static final boolean DEBUG = false;
//
// data
//
//
// DOM Level 3 implementation: variables intialized in DOMSerializerImpl
//
/** stores namespaces in scope */
protected NamespaceSupport fNSBinder;
/** stores all namespace bindings on the current element */
protected NamespaceSupport fLocalNSBinder;
/** symbol table for serialization */
protected SymbolTable fSymbolTable;
// is node dom level 1 node?
protected boolean fDOML1 = false;
// counter for new prefix names
protected int fNamespaceCounter = 1;
protected final static String PREFIX = "NS";
/**
* Controls whether namespace fixup should be performed during
* the serialization.
* NOTE: if this field is set to true the following
* fields need to be initialized: fNSBinder, fLocalNSBinder, fSymbolTable,
* XMLSymbols.EMPTY_STRING, fXmlSymbol, fXmlnsSymbol, fNamespaceCounter.
*/
protected boolean fNamespaces = false;
private boolean fPreserveSpace;
/**
* Constructs a new serializer. The serializer cannot be used without
* calling {@link #setOutputCharStream} or {@link #setOutputByteStream}
* first.
*/
public XML11Serializer() {
super( );
_format.setVersion("1.1");
}
/**
* Constructs a new serializer. The serializer cannot be used without
* calling {@link #setOutputCharStream} or {@link #setOutputByteStream}
* first.
*/
public XML11Serializer( OutputFormat format ) {
super( format );
_format.setVersion("1.1");
}
/**
* Constructs a new serializer that writes to the specified writer
* using the specified output format. If <tt>format is null,
* will use a default output format.
*
* @param writer The writer to use
* @param format The output format to use, null for the default
*/
public XML11Serializer( Writer writer, OutputFormat format ) {
super( writer, format );
_format.setVersion("1.1");
}
/**
* Constructs a new serializer that writes to the specified output
* stream using the specified output format. If <tt>format
* is null, will use a default output format.
*
* @param output The output stream to use
* @param format The output format to use, null for the default
*/
public XML11Serializer( OutputStream output, OutputFormat format ) {
super( output, format != null ? format : new OutputFormat( Method.XML, null, false ) );
_format.setVersion("1.1");
}
//-----------------------------------------//
// SAX content handler serializing methods //
//-----------------------------------------//
public void characters( char[] chars, int start, int length )
throws SAXException
{
ElementState state;
try {
state = content();
// Check if text should be print as CDATA section or unescaped
// based on elements listed in the output format (the element
// state) or whether we are inside a CDATA section or entity.
if ( state.inCData || state.doCData ) {
int saveIndent;
// Print a CDATA section. The text is not escaped, but ']]>'
// appearing in the code must be identified and dealt with.
// The contents of a text node is considered space preserving.
if ( ! state.inCData ) {
_printer.printText( "<![CDATA[" );
state.inCData = true;
}
saveIndent = _printer.getNextIndent();
_printer.setNextIndent( 0 );
char ch;
final int end = start + length;
for ( int index = start; index < end; ++index ) {
ch = chars[index];
if ( ch == ']' && index + 2 < end &&
chars[ index + 1 ] == ']' && chars[ index + 2 ] == '>' ) {
_printer.printText("]]]]><![CDATA[>");
index +=2;
continue;
}
if (!XML11Char.isXML11Valid(ch)) {
// check if it is surrogate
if (++index < end) {
surrogates(ch, chars[index]);
}
else {
fatalError("The character '"+(char)ch+"' is an invalid XML character");
}
continue;
} else {
if ( _encodingInfo.isPrintable((char)ch) && XML11Char.isXML11ValidLiteral(ch)) {
_printer.printText((char)ch);
} else {
// The character is not printable -- split CDATA section
_printer.printText("]]>&#x");
_printer.printText(Integer.toHexString(ch));
_printer.printText(";<![CDATA[");
}
}
}
_printer.setNextIndent( saveIndent );
} else {
int saveIndent;
if ( state.preserveSpace ) {
// If preserving space then hold of indentation so no
// excessive spaces are printed at line breaks, escape
// the text content without replacing spaces and print
// the text breaking only at line breaks.
saveIndent = _printer.getNextIndent();
_printer.setNextIndent( 0 );
printText( chars, start, length, true, state.unescaped );
_printer.setNextIndent( saveIndent );
} else {
printText( chars, start, length, false, state.unescaped );
}
}
} catch ( IOException except ) {
throw new SAXException( except );
}
}
//
// overwrite printing functions to make sure serializer prints out valid XML
//
protected void printEscaped( String source ) throws IOException {
int length = source.length();
for ( int i = 0 ; i < length ; ++i ) {
int ch = source.charAt(i);
if (!XML11Char.isXML11Valid(ch)) {
if (++i <length) {
surrogates(ch, source.charAt(i));
} else {
fatalError("The character '"+(char)ch+"' is an invalid XML character");
}
continue;
}
if (ch == '\n' || ch == '\r' || ch == '\t' || ch == 0x0085 || ch == 0x2028){
printHex(ch);
} else if (ch == '<') {
_printer.printText("<");
} else if (ch == '&') {
_printer.printText("&");
} else if (ch == '"') {
_printer.printText(""");
} else if ((ch >= ' ' && _encodingInfo.isPrintable((char) ch))) {
_printer.printText((char) ch);
} else {
printHex(ch);
}
}
}
protected final void printCDATAText(String text) throws IOException {
int length = text.length();
char ch;
for (int index = 0; index < length; ++index) {
ch = text.charAt(index);
if (ch == ']'
&& index + 2 < length
&& text.charAt(index + 1) == ']'
&& text.charAt(index + 2) == '>') { // check for ']]>'
if (fDOMErrorHandler != null){
// REVISIT: this means that if DOM Error handler is not registered we don't report any
// fatal errors and might serialize not wellformed document
if ((features & DOMSerializerImpl.SPLITCDATA) == 0
&& (features & DOMSerializerImpl.WELLFORMED) == 0) {
// issue fatal error
String msg =
DOMMessageFormatter.formatMessage(
DOMMessageFormatter.SERIALIZER_DOMAIN,
"EndingCDATA",
null);
modifyDOMError(
msg,
DOMError.SEVERITY_FATAL_ERROR,
null, fCurrentNode);
boolean continueProcess =
fDOMErrorHandler.handleError(fDOMError);
if (!continueProcess) {
throw new IOException();
}
} else {
// issue warning
String msg =
DOMMessageFormatter.formatMessage(
DOMMessageFormatter.SERIALIZER_DOMAIN,
"SplittingCDATA",
null);
modifyDOMError(
msg,
DOMError.SEVERITY_WARNING,
null, fCurrentNode);
fDOMErrorHandler.handleError(fDOMError);
}
}
// split CDATA section
_printer.printText("]]]]><![CDATA[>");
index += 2;
continue;
}
if (!XML11Char.isXML11Valid(ch)) {
// check if it is surrogate
if (++index < length) {
surrogates(ch, text.charAt(index));
} else {
fatalError(
"The character '"
+ (char) ch
+ "' is an invalid XML character");
}
continue;
} else {
if (_encodingInfo.isPrintable((char) ch)
&& XML11Char.isXML11ValidLiteral(ch)) {
_printer.printText((char) ch);
} else {
// The character is not printable -- split CDATA section
_printer.printText("]]>&#x");
_printer.printText(Integer.toHexString(ch));
_printer.printText(";<![CDATA[");
}
}
}
}
// note that this "int" should, in all cases, be a char.
// REVISIT: make it a char...
protected final void printXMLChar( int ch ) throws IOException {
if (ch == '\r' || ch == 0x0085 || ch == 0x2028) {
printHex(ch);
} else if ( ch == '<') {
_printer.printText("<");
} else if (ch == '&') {
_printer.printText("&");
} else if (ch == '>'){
// character sequence "]]>" can't appear in content, therefore
// we should escape '>'
_printer.printText(">");
} else if ( _encodingInfo.isPrintable((char)ch) && XML11Char.isXML11ValidLiteral(ch)) {
_printer.printText((char)ch);
} else {
printHex(ch);
}
}
protected final void surrogates(int high, int low) throws IOException{
if (XMLChar.isHighSurrogate(high)) {
if (!XMLChar.isLowSurrogate(low)) {
//Invalid XML
fatalError("The character '"+(char)low+"' is an invalid XML character");
}
else {
int supplemental = XMLChar.supplemental((char)high, (char)low);
if (!XML11Char.isXML11Valid(supplemental)) {
//Invalid XML
fatalError("The character '"+(char)supplemental+"' is an invalid XML character");
}
else {
if (content().inCData ) {
_printer.printText("]]>&#x");
_printer.printText(Integer.toHexString(supplemental));
_printer.printText(";<![CDATA[");
}
else {
printHex(supplemental);
}
}
}
} else {
fatalError("The character '"+(char)high+"' is an invalid XML character");
}
}
protected void printText( String text, boolean preserveSpace, boolean unescaped )
throws IOException {
int index;
char ch;
int length = text.length();
if ( preserveSpace ) {
// Preserving spaces: the text must print exactly as it is,
// without breaking when spaces appear in the text and without
// consolidating spaces. If a line terminator is used, a line
// break will occur.
for ( index = 0 ; index < length ; ++index ) {
ch = text.charAt( index );
if (!XML11Char.isXML11Valid(ch)) {
// check if it is surrogate
if (++index <length) {
surrogates(ch, text.charAt(index));
} else {
fatalError("The character '"+(char)ch+"' is an invalid XML character");
}
continue;
}
if ( unescaped && XML11Char.isXML11ValidLiteral(ch)) {
_printer.printText( ch );
} else
printXMLChar( ch );
}
} else {
// Not preserving spaces: print one part at a time, and
// use spaces between parts to break them into different
// lines. Spaces at beginning of line will be stripped
// by printing mechanism. Line terminator is treated
// no different than other text part.
for ( index = 0 ; index < length ; ++index ) {
ch = text.charAt( index );
if (!XML11Char.isXML11Valid(ch)) {
// check if it is surrogate
if (++index <length) {
surrogates(ch, text.charAt(index));
} else {
fatalError("The character '"+(char)ch+"' is an invalid XML character");
}
continue;
}
if ( unescaped && XML11Char.isXML11ValidLiteral(ch) )
_printer.printText( ch );
else
printXMLChar( ch);
}
}
}
protected void printText( char[] chars, int start, int length,
boolean preserveSpace, boolean unescaped ) throws IOException {
int index;
char ch;
if ( preserveSpace ) {
// Preserving spaces: the text must print exactly as it is,
// without breaking when spaces appear in the text and without
// consolidating spaces. If a line terminator is used, a line
// break will occur.
while ( length-- > 0 ) {
ch = chars[start++];
if (!XML11Char.isXML11Valid(ch)) {
// check if it is surrogate
if ( length-- > 0) {
surrogates(ch, chars[start++]);
} else {
fatalError("The character '"+(char)ch+"' is an invalid XML character");
}
continue;
}
if ( unescaped && XML11Char.isXML11ValidLiteral(ch))
_printer.printText( ch );
else
printXMLChar( ch );
}
} else {
// Not preserving spaces: print one part at a time, and
// use spaces between parts to break them into different
// lines. Spaces at beginning of line will be stripped
// by printing mechanism. Line terminator is treated
// no different than other text part.
while ( length-- > 0 ) {
ch = chars[start++];
if (!XML11Char.isXML11Valid(ch)) {
// check if it is surrogate
if ( length-- > 0) {
surrogates(ch, chars[start++]);
} else {
fatalError("The character '"+(char)ch+"' is an invalid XML character");
}
continue;
}
if ( unescaped && XML11Char.isXML11ValidLiteral(ch))
_printer.printText( ch );
else
printXMLChar( ch );
}
}
}
public boolean reset() {
super.reset();
return true;
}
}
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