jdk8u.jaxp.xml.external.stream.writers.XMLStreamWriterImpl Maven / Gradle / Ivy
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/*
* Copyright (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package jdk8u.jaxp.xml.external.stream.writers;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetEncoder;
import java.util.AbstractMap;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Random;
import java.util.Vector;
import java.util.Set;
import java.util.Iterator;
import javax.xml.XMLConstants;
import javax.xml.namespace.NamespaceContext;
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.transform.stream.StreamResult;
import jdk8u.jaxp.org.apache.xerces.external.impl.Constants;
import jdk8u.jaxp.org.apache.xerces.external.impl.PropertyManager;
import jdk8u.jaxp.org.apache.xerces.external.util.NamespaceSupport;
import jdk8u.jaxp.org.apache.xerces.external.util.SymbolTable;
import jdk8u.jaxp.org.apache.xerces.external.utils.SecuritySupport;
import jdk8u.jaxp.org.apache.xerces.external.xni.QName;
import jdk8u.jaxp.xml.external.stream.util.ReadOnlyIterator;
/**
* This class implements a StAX XMLStreamWriter. It extends
* AbstractMap in order to support a getter for
* implementation-specific properties. For example, you can get
* the underlying OutputStream by casting an instance
* of this class to Map and calling
* getProperty(OUTPUTSTREAM_PROPERTY).
*
* @author Neeraj Bajaj
* @author K.Venugopal
* @author [email protected]
* @author [email protected]
*/
public final class XMLStreamWriterImpl extends AbstractMap implements XMLStreamWriter {
public static final String START_COMMENT = "";
public static final String DEFAULT_ENCODING = " encoding=\"utf-8\"";
public static final String DEFAULT_XMLDECL = "";
public static final String DEFAULT_XML_VERSION = "1.0";
public static final char CLOSE_START_TAG = '>';
public static final char OPEN_START_TAG = '<';
public static final String OPEN_END_TAG = "';
public static final String START_CDATA = "";
public static final String CLOSE_EMPTY_ELEMENT = "/>";
public static final String SPACE = " ";
public static final String UTF_8 = "UTF-8";
public static final String OUTPUTSTREAM_PROPERTY = "sjsxp-outputstream";
/**
* This flag can be used to turn escaping off for content. It does
* not apply to attribute content.
*/
boolean fEscapeCharacters = true;
/**
* Flag for the value of repairNamespace property
*/
private boolean fIsRepairingNamespace = false;
/**
* Underlying Writer to which characters are written.
*/
private Writer fWriter;
/**
* Underlying OutputStream to which fWriter
* writes to. May be null if unknown.
*/
private OutputStream fOutputStream = null;
/**
* Collects attributes when the writer is in reparing mode.
*/
private ArrayList fAttributeCache;
/**
* Collects namespace declarations when the writer is in reparing mode.
*/
private ArrayList fNamespaceDecls;
/**
* Namespace context encapsulating user specified context
* and context built by the writer
*/
private NamespaceContextImpl fNamespaceContext = null;
private NamespaceSupport fInternalNamespaceContext = null;
private Random fPrefixGen = null;
/**
* Reference to PropertyManager
*/
private PropertyManager fPropertyManager = null;
/**
* Flag to track if start tag is opened
*/
private boolean fStartTagOpened = false;
/**
* Boolean flag to indicate, if instance can be reused
*/
private boolean fReuse;
private SymbolTable fSymbolTable = new SymbolTable();
private ElementStack fElementStack = new ElementStack(); //Change this .-Venu
final private String DEFAULT_PREFIX = fSymbolTable.addSymbol("");
private final ReadOnlyIterator fReadOnlyIterator = new ReadOnlyIterator();
/**
* In some cases, this charset encoder is used to determine if a char is
* encodable by underlying writer. For example, an 8-bit char from the
* extended ASCII set is not encodable by 7-bit ASCII encoder. Unencodable
* chars are escaped using XML numeric entities.
*/
private CharsetEncoder fEncoder = null;
/**
* This is used to hold the namespace for attributes which happen to have
* the same uri as the default namespace; It's added to avoid changing the
* current impl. which has many redundant code for the repair mode
*/
HashMap fAttrNamespace = null;
/**
* Creates a new instance of XMLStreamWriterImpl. Uses platform's default
* encoding.
*
* @param outputStream Underlying stream to write the bytes to
* @param props Properties used by this writer
*/
public XMLStreamWriterImpl(OutputStream outputStream, PropertyManager props)
throws IOException {
// cannot call this(outputStream, null, props); for constructor,
// OutputStreamWriter charsetName cannot be null
// use default encoding
this(new OutputStreamWriter(outputStream), props);
}
/**
* Creates a new instance of XMLStreamWriterImpl.
*
* @param outputStream Underlying stream to write the bytes
* @param encoding Encoding used to convert chars into bytes
* @param props Properties used by this writer
*/
public XMLStreamWriterImpl(OutputStream outputStream, String encoding,
PropertyManager props) throws java.io.IOException {
this(new StreamResult(outputStream), encoding, props);
}
/**
* Creates a new instance of XMLStreamWriterImpl using a Writer.
*
* @param writer Underlying writer to which chars are written
* @param props Properties used by this writer
*/
public XMLStreamWriterImpl(Writer writer, PropertyManager props)
throws java.io.IOException {
this(new StreamResult(writer), null, props);
}
/**
* Creates a new instance of XMLStreamWriterImpl using a StreamResult.
* A StreamResult encasupates an OutputStream, a Writer or a SystemId.
*
* @param writer Underlying writer to which chars are written
* @param props Properties used by this writer
*/
public XMLStreamWriterImpl(StreamResult sr, String encoding,
PropertyManager props) throws java.io.IOException {
setOutput(sr, encoding);
fPropertyManager = props;
init();
}
/**
* Initialize an instance of this XMLStreamWriter. Allocate new instances
* for all the data structures. Set internal flags based on property values.
*/
private void init() {
fReuse = false;
fNamespaceDecls = new ArrayList();
fPrefixGen = new Random();
fAttributeCache = new ArrayList();
fInternalNamespaceContext = new NamespaceSupport();
fInternalNamespaceContext.reset();
fNamespaceContext = new NamespaceContextImpl();
fNamespaceContext.internalContext = fInternalNamespaceContext;
// Set internal state based on property values
Boolean ob = (Boolean) fPropertyManager.getProperty(XMLOutputFactory.IS_REPAIRING_NAMESPACES);
fIsRepairingNamespace = ob.booleanValue();
ob = (Boolean) fPropertyManager.getProperty(Constants.ESCAPE_CHARACTERS);
setEscapeCharacters(ob.booleanValue());
}
/**
* Reset this instance so that it can be re-used. Do not read properties
* again. The method setOutput(StreamResult, encoding) must
* be called after this one.
*/
public void reset() {
reset(false);
}
/**
* Reset this instance so that it can be re-used. Clears but does not
* re-allocate internal data structures.
*
* @param resetProperties Indicates if properties should be read again
*/
void reset(boolean resetProperties) {
if (!fReuse) {
throw new java.lang.IllegalStateException(
"close() Must be called before calling reset()");
}
fReuse = false;
fNamespaceDecls.clear();
fAttributeCache.clear();
// reset Element/NamespaceContext stacks
fElementStack.clear();
fInternalNamespaceContext.reset();
fStartTagOpened = false;
fNamespaceContext.userContext = null;
if (resetProperties) {
Boolean ob = (Boolean) fPropertyManager.getProperty(XMLOutputFactory.IS_REPAIRING_NAMESPACES);
fIsRepairingNamespace = ob.booleanValue();
ob = (Boolean) fPropertyManager.getProperty(Constants.ESCAPE_CHARACTERS);
setEscapeCharacters(ob.booleanValue());
}
}
/**
* Use a StreamResult to initialize the output for this XMLStreamWriter. Check
* for OutputStream, Writer and then systemId, in that order.
*
* @param sr StreamResult encapsulating output information
* @param encoding Encoding to be used except when a Writer is available
*/
public void setOutput(StreamResult sr, String encoding)
throws IOException {
if (sr.getOutputStream() != null) {
setOutputUsingStream(sr.getOutputStream(), encoding);
}
else if (sr.getWriter() != null) {
setOutputUsingWriter(sr.getWriter());
}
else if (sr.getSystemId() != null) {
setOutputUsingStream(new FileOutputStream(sr.getSystemId()),
encoding);
}
}
private void setOutputUsingWriter(Writer writer)
throws IOException
{
fWriter = writer;
if (writer instanceof OutputStreamWriter) {
String charset = ((OutputStreamWriter) writer).getEncoding();
if (charset != null && !charset.equalsIgnoreCase("utf-8")) {
fEncoder = Charset.forName(charset).newEncoder();
}
}
}
/**
* Utility method to create a writer when passed an OutputStream. Make
* sure to wrap an OutputStreamWriter using an
* XMLWriter for performance reasons.
*
* @param os Underlying OutputStream
* @param encoding Encoding used to convert chars into bytes
*/
private void setOutputUsingStream(OutputStream os, String encoding)
throws IOException {
fOutputStream = os;
if (encoding != null) {
if (encoding.equalsIgnoreCase("utf-8")) {
fWriter = new UTF8OutputStreamWriter(os);
}
else {
fWriter = new XMLWriter(new OutputStreamWriter(os, encoding));
fEncoder = Charset.forName(encoding).newEncoder();
}
} else {
encoding = SecuritySupport.getSystemProperty("file.encoding");
if (encoding != null && encoding.equalsIgnoreCase("utf-8")) {
fWriter = new UTF8OutputStreamWriter(os);
} else {
fWriter = new XMLWriter(new OutputStreamWriter(os));
}
}
}
/** Can this instance be reused
*
* @return boolean boolean value to indicate if this instance can be reused or not
*/
public boolean canReuse() {
return fReuse;
}
public void setEscapeCharacters(boolean escape) {
fEscapeCharacters = escape;
}
public boolean getEscapeCharacters() {
return fEscapeCharacters;
}
/**
* Close this XMLStreamWriter by closing underlying writer.
*/
public void close() throws XMLStreamException {
if (fWriter != null) {
try {
//fWriter.close();
fWriter.flush();
} catch (IOException e) {
throw new XMLStreamException(e);
}
}
fWriter = null;
fOutputStream = null;
fNamespaceDecls.clear();
fAttributeCache.clear();
fElementStack.clear();
fInternalNamespaceContext.reset();
fReuse = true;
fStartTagOpened = false;
fNamespaceContext.userContext = null;
}
/**
* Flush this XMLStreamWriter by flushin underlying writer.
*/
public void flush() throws XMLStreamException {
try {
fWriter.flush();
} catch (IOException e) {
throw new XMLStreamException(e);
}
}
/**
* Return NamespaceContext being used by the writer.
*
* @return NamespaceContext
*/
public NamespaceContext getNamespaceContext() {
return fNamespaceContext;
}
/**
* Return a prefix associated with specified uri, or null if the
* uri is unknown.
*
* @param uri The namespace uri
* @throws XMLStreamException if uri specified is "" or null
*/
public String getPrefix(String uri) throws XMLStreamException {
return fNamespaceContext.getPrefix(uri);
}
/**
* Returns value associated with the specified property name.
*
* @param str Property name
* @throws IllegalArgumentException if the specified property is not supported
* @return value associated with the specified property.
*/
public Object getProperty(String str)
throws IllegalArgumentException {
if (str == null) {
throw new NullPointerException();
}
if (!fPropertyManager.containsProperty(str)) {
throw new IllegalArgumentException("Property '" + str +
"' is not supported");
}
return fPropertyManager.getProperty(str);
}
/**
* Set the specified URI as default namespace in the current namespace context.
*
* @param uri Namespace URI
*/
public void setDefaultNamespace(String uri) throws XMLStreamException {
if (uri != null) {
uri = fSymbolTable.addSymbol(uri);
}
if (fIsRepairingNamespace) {
if (isDefaultNamespace(uri)) {
return;
}
QName qname = new QName();
qname.setValues(DEFAULT_PREFIX, "xmlns", null, uri);
fNamespaceDecls.add(qname);
} else {
fInternalNamespaceContext.declarePrefix(DEFAULT_PREFIX, uri);
}
}
/**
* Sets the current NamespaceContext for prefix and uri bindings.
* This context becomes the root namespace context for writing and
* will replace the current root namespace context. Subsequent calls
* to setPrefix and setDefaultNamespace will bind namespaces using
* the context passed to the method as the root context for resolving
* namespaces. This method may only be called once at the start of the
* document. It does not cause the namespaces to be declared. If a
* namespace URI to prefix mapping is found in the namespace context
* it is treated as declared and the prefix may be used by the
* XMLStreamWriter.
*
* @param namespaceContext the namespace context to use for this writer, may not be null
* @throws XMLStreamException
*/
public void setNamespaceContext(NamespaceContext namespaceContext)
throws XMLStreamException {
fNamespaceContext.userContext = namespaceContext;
}
/**
* Sets the prefix the uri is bound to. This prefix is bound in the scope of
* the current START_ELEMENT / END_ELEMENT pair. If this method is called before
* a START_ELEMENT has been written the prefix is bound in the root scope.
*
* @param prefix
* @param uri
* @throws XMLStreamException
*/
public void setPrefix(String prefix, String uri) throws XMLStreamException {
if (prefix == null) {
throw new XMLStreamException("Prefix cannot be null");
}
if (uri == null) {
throw new XMLStreamException("URI cannot be null");
}
prefix = fSymbolTable.addSymbol(prefix);
uri = fSymbolTable.addSymbol(uri);
if (fIsRepairingNamespace) {
String tmpURI = fInternalNamespaceContext.getURI(prefix);
if ((tmpURI != null) && (tmpURI == uri)) {
return;
}
if(checkUserNamespaceContext(prefix,uri))
return;
QName qname = new QName();
qname.setValues(prefix,XMLConstants.XMLNS_ATTRIBUTE, null,uri);
fNamespaceDecls.add(qname);
return;
}
fInternalNamespaceContext.declarePrefix(prefix, uri);
}
public void writeAttribute(String localName, String value)
throws XMLStreamException {
try {
if (!fStartTagOpened) {
throw new XMLStreamException(
"Attribute not associated with any element");
}
if (fIsRepairingNamespace) {
Attribute attr = new Attribute(value); // Revisit:Dont create new one's. Reuse.-Venu
attr.setValues(null, localName, null, null);
fAttributeCache.add(attr);
return;
}
fWriter.write(" ");
fWriter.write(localName);
fWriter.write("=\"");
writeXMLContent(
value,
true, // true = escapeChars
true); // true = escapeDoubleQuotes
fWriter.write("\"");
} catch (IOException e) {
throw new XMLStreamException(e);
}
}
public void writeAttribute(String namespaceURI, String localName,
String value) throws XMLStreamException {
try {
if (!fStartTagOpened) {
throw new XMLStreamException(
"Attribute not associated with any element");
}
if (namespaceURI == null) {
throw new XMLStreamException("NamespaceURI cannot be null");
}
namespaceURI = fSymbolTable.addSymbol(namespaceURI);
String prefix = fInternalNamespaceContext.getPrefix(namespaceURI);
if (!fIsRepairingNamespace) {
if (prefix == null) {
throw new XMLStreamException("Prefix cannot be null");
}
writeAttributeWithPrefix(prefix, localName, value);
} else {
Attribute attr = new Attribute(value);
attr.setValues(null, localName, null, namespaceURI);
fAttributeCache.add(attr);
}
} catch (IOException e) {
throw new XMLStreamException(e);
}
}
private void writeAttributeWithPrefix(String prefix, String localName,
String value) throws IOException {
fWriter.write(SPACE);
if ((prefix != null) && (prefix != XMLConstants.DEFAULT_NS_PREFIX)) {
fWriter.write(prefix);
fWriter.write(":");
}
fWriter.write(localName);
fWriter.write("=\"");
writeXMLContent(value,
true, // true = escapeChars
true); // true = escapeDoubleQuotes
fWriter.write("\"");
}
public void writeAttribute(String prefix, String namespaceURI,
String localName, String value) throws XMLStreamException {
try {
if (!fStartTagOpened) {
throw new XMLStreamException(
"Attribute not associated with any element");
}
if (namespaceURI == null) {
throw new XMLStreamException("NamespaceURI cannot be null");
}
if (localName == null) {
throw new XMLStreamException("Local name cannot be null");
}
if (!fIsRepairingNamespace) {
if (prefix == null || prefix.equals("")){
if (!namespaceURI.equals("")) {
throw new XMLStreamException("prefix cannot be null or empty");
} else {
writeAttributeWithPrefix(null, localName, value);
return;
}
}
if (!prefix.equals(XMLConstants.XML_NS_PREFIX) || !namespaceURI.equals(XMLConstants.XML_NS_URI)) {
prefix = fSymbolTable.addSymbol(prefix);
namespaceURI = fSymbolTable.addSymbol(namespaceURI);
if (fInternalNamespaceContext.containsPrefixInCurrentContext(prefix)){
String tmpURI = fInternalNamespaceContext.getURI(prefix);
if (tmpURI != null && tmpURI != namespaceURI){
throw new XMLStreamException("Prefix "+prefix+" is " +
"already bound to "+tmpURI+
". Trying to rebind it to "+namespaceURI+" is an error.");
}
}
fInternalNamespaceContext.declarePrefix(prefix, namespaceURI);
}
writeAttributeWithPrefix(prefix, localName, value);
} else {
if (prefix != null) {
prefix = fSymbolTable.addSymbol(prefix);
}
namespaceURI = fSymbolTable.addSymbol(namespaceURI);
Attribute attr = new Attribute(value);
attr.setValues(prefix, localName, null, namespaceURI);
fAttributeCache.add(attr);
}
} catch (IOException e) {
throw new XMLStreamException(e);
}
}
public void writeCData(String cdata) throws XMLStreamException {
try {
if (cdata == null) {
throw new XMLStreamException("cdata cannot be null");
}
if (fStartTagOpened) {
closeStartTag();
}
fWriter.write(START_CDATA);
fWriter.write(cdata);
fWriter.write(END_CDATA);
} catch (IOException e) {
throw new XMLStreamException(e);
}
}
public void writeCharacters(String data) throws XMLStreamException {
try {
if (fStartTagOpened) {
closeStartTag();
}
writeXMLContent(data);
} catch (IOException e) {
throw new XMLStreamException(e);
}
}
public void writeCharacters(char[] data, int start, int len)
throws XMLStreamException {
try {
if (fStartTagOpened) {
closeStartTag();
}
writeXMLContent(data, start, len, fEscapeCharacters);
} catch (IOException e) {
throw new XMLStreamException(e);
}
}
public void writeComment(String comment) throws XMLStreamException {
try {
if (fStartTagOpened) {
closeStartTag();
}
fWriter.write(START_COMMENT);
if (comment != null) {
fWriter.write(comment);
}
fWriter.write(END_COMMENT);
} catch (IOException e) {
throw new XMLStreamException(e);
}
}
public void writeDTD(String dtd) throws XMLStreamException {
try {
if (fStartTagOpened) {
closeStartTag();
}
fWriter.write(dtd);
} catch (IOException e) {
throw new XMLStreamException(e);
}
}
/*
* Write default Namespace.
*
* If namespaceURI == null,
* then it is assumed to be equivilent to {@link XMLConstants.NULL_NS_URI},
* i.e. there is no Namespace.
*
* @param namespaceURI NamespaceURI to declare.
*
* @throws XMLStreamException
*
* @see
* Namespaces in XML, 5.2 Namespace Defaulting
*/
public void writeDefaultNamespace(String namespaceURI)
throws XMLStreamException {
// normalize namespaceURI
String namespaceURINormalized = null;
if (namespaceURI == null) {
namespaceURINormalized = ""; // XMLConstants.NULL_NS_URI
} else {
namespaceURINormalized = namespaceURI;
}
try {
if (!fStartTagOpened) {
throw new IllegalStateException(
"Namespace Attribute not associated with any element");
}
if (fIsRepairingNamespace) {
QName qname = new QName();
qname.setValues(XMLConstants.DEFAULT_NS_PREFIX,
XMLConstants.XMLNS_ATTRIBUTE, null, namespaceURINormalized);
fNamespaceDecls.add(qname);
return;
}
namespaceURINormalized = fSymbolTable.addSymbol(namespaceURINormalized);
if (fInternalNamespaceContext.containsPrefixInCurrentContext("")){
String tmp = fInternalNamespaceContext.getURI("");
if (tmp != null && tmp != namespaceURINormalized) {
throw new XMLStreamException(
"xmlns has been already bound to " +tmp +
". Rebinding it to "+ namespaceURINormalized +
" is an error");
}
}
fInternalNamespaceContext.declarePrefix("", namespaceURINormalized);
// use common namespace code with a prefix == null for xmlns="..."
writenamespace(null, namespaceURINormalized);
} catch (IOException e) {
throw new XMLStreamException(e);
}
}
public void writeEmptyElement(String localName) throws XMLStreamException {
try {
if (fStartTagOpened) {
closeStartTag();
}
openStartTag();
fElementStack.push(null, localName, null, null, true);
fInternalNamespaceContext.pushContext();
if (!fIsRepairingNamespace) {
fWriter.write(localName);
}
} catch (IOException e) {
throw new XMLStreamException(e);
}
}
public void writeEmptyElement(String namespaceURI, String localName)
throws XMLStreamException {
if (namespaceURI == null) {
throw new XMLStreamException("NamespaceURI cannot be null");
}
namespaceURI = fSymbolTable.addSymbol(namespaceURI);
String prefix = fNamespaceContext.getPrefix(namespaceURI);
writeEmptyElement(prefix, localName, namespaceURI);
}
public void writeEmptyElement(String prefix, String localName,
String namespaceURI) throws XMLStreamException {
try {
if (localName == null) {
throw new XMLStreamException("Local Name cannot be null");
}
if (namespaceURI == null) {
throw new XMLStreamException("NamespaceURI cannot be null");
}
if (prefix != null) {
prefix = fSymbolTable.addSymbol(prefix);
}
namespaceURI = fSymbolTable.addSymbol(namespaceURI);
if (fStartTagOpened) {
closeStartTag();
}
openStartTag();
fElementStack.push(prefix, localName, null, namespaceURI, true);
fInternalNamespaceContext.pushContext();
if (!fIsRepairingNamespace) {
if (prefix == null) {
throw new XMLStreamException("NamespaceURI " +
namespaceURI + " has not been bound to any prefix");
}
} else {
return;
}
if ((prefix != null) && (prefix != XMLConstants.DEFAULT_NS_PREFIX)) {
fWriter.write(prefix);
fWriter.write(":");
}
fWriter.write(localName);
} catch (IOException e) {
throw new XMLStreamException(e);
}
}
public void writeEndDocument() throws XMLStreamException {
try {
if (fStartTagOpened) {
closeStartTag();
}
ElementState elem = null;
while (!fElementStack.empty()) {
elem = (ElementState) fElementStack.pop();
fInternalNamespaceContext.popContext();
if (elem.isEmpty) {
//fWriter.write(CLOSE_EMPTY_ELEMENT);
} else {
fWriter.write(OPEN_END_TAG);
if ((elem.prefix != null) && !(elem.prefix).equals("")) {
fWriter.write(elem.prefix);
fWriter.write(":");
}
fWriter.write(elem.localpart);
fWriter.write(CLOSE_END_TAG);
}
}
} catch (IOException e) {
throw new XMLStreamException(e);
} catch (ArrayIndexOutOfBoundsException e) {
throw new XMLStreamException("No more elements to write");
}
}
public void writeEndElement() throws XMLStreamException {
try {
if (fStartTagOpened) {
closeStartTag();
}
ElementState currentElement = (ElementState) fElementStack.pop();
if (currentElement == null) {
throw new XMLStreamException("No element was found to write");
}
if (currentElement.isEmpty) {
//fWriter.write(CLOSE_EMPTY_ELEMENT);
return;
}
fWriter.write(OPEN_END_TAG);
if ((currentElement.prefix != null) &&
!(currentElement.prefix).equals("")) {
fWriter.write(currentElement.prefix);
fWriter.write(":");
}
fWriter.write(currentElement.localpart);
fWriter.write(CLOSE_END_TAG);
fInternalNamespaceContext.popContext();
} catch (IOException e) {
throw new XMLStreamException(e);
} catch (ArrayIndexOutOfBoundsException e) {
throw new XMLStreamException(
"No element was found to write: "
+ e.toString(), e);
}
}
public void writeEntityRef(String refName) throws XMLStreamException {
try {
if (fStartTagOpened) {
closeStartTag();
}
fWriter.write('&');
fWriter.write(refName);
fWriter.write(';');
} catch (IOException e) {
throw new XMLStreamException(e);
}
}
/**
* Write a Namespace declaration.
*
* If namespaceURI == null,
* then it is assumed to be equivilent to {@link XMLConstants.NULL_NS_URI},
* i.e. there is no Namespace.
*
* @param prefix Prefix to bind.
* @param namespaceURI NamespaceURI to declare.
*
* @throws XMLStreamException
*
* @see
* Namespaces in XML, 5.2 Namespace Defaulting
*/
public void writeNamespace(String prefix, String namespaceURI)
throws XMLStreamException {
// normalize namespaceURI
String namespaceURINormalized = null;
if (namespaceURI == null) {
namespaceURINormalized = ""; // XMLConstants.NULL_NS_URI
} else {
namespaceURINormalized = namespaceURI;
}
try {
QName qname = null;
if (!fStartTagOpened) {
throw new IllegalStateException(
"Invalid state: start tag is not opened at writeNamespace("
+ prefix
+ ", "
+ namespaceURINormalized
+ ")");
}
// is this the default Namespace?
if (prefix == null
|| prefix.equals(XMLConstants.DEFAULT_NS_PREFIX)
|| prefix.equals(XMLConstants.XMLNS_ATTRIBUTE)) {
writeDefaultNamespace(namespaceURINormalized);
return;
}
if (prefix.equals(XMLConstants.XML_NS_PREFIX) && namespaceURINormalized.equals(XMLConstants.XML_NS_URI))
return;
prefix = fSymbolTable.addSymbol(prefix);
namespaceURINormalized = fSymbolTable.addSymbol(namespaceURINormalized);
if (fIsRepairingNamespace) {
String tmpURI = fInternalNamespaceContext.getURI(prefix);
if ((tmpURI != null) && (tmpURI == namespaceURINormalized)) {
return;
}
qname = new QName();
qname.setValues(prefix, XMLConstants.XMLNS_ATTRIBUTE, null,
namespaceURINormalized);
fNamespaceDecls.add(qname);
return;
}
if (fInternalNamespaceContext.containsPrefixInCurrentContext(prefix)){
String tmp = fInternalNamespaceContext.getURI(prefix);
if (tmp != null && tmp != namespaceURINormalized) {
throw new XMLStreamException("prefix "+prefix+
" has been already bound to " +tmp +
". Rebinding it to "+ namespaceURINormalized+
" is an error");
}
}
fInternalNamespaceContext.declarePrefix(prefix, namespaceURINormalized);
writenamespace(prefix, namespaceURINormalized);
} catch (IOException e) {
throw new XMLStreamException(e);
}
}
private void writenamespace(String prefix, String namespaceURI)
throws IOException {
fWriter.write(" xmlns");
if ((prefix != null) && (prefix != XMLConstants.DEFAULT_NS_PREFIX)) {
fWriter.write(":");
fWriter.write(prefix);
}
fWriter.write("=\"");
writeXMLContent(
namespaceURI,
true, // true = escapeChars
true); // true = escapeDoubleQuotes
fWriter.write("\"");
}
public void writeProcessingInstruction(String target)
throws XMLStreamException {
try {
if (fStartTagOpened) {
closeStartTag();
}
if (target != null) {
fWriter.write("");
return;
}
} catch (IOException e) {
throw new XMLStreamException(e);
}
throw new XMLStreamException("PI target cannot be null");
}
/**
* @param target
* @param data
* @throws XMLStreamException
*/
public void writeProcessingInstruction(String target, String data)
throws XMLStreamException {
try {
if (fStartTagOpened) {
closeStartTag();
}
if ((target == null) || (data == null)) {
throw new XMLStreamException("PI target cannot be null");
}
fWriter.write("");
} catch (IOException e) {
throw new XMLStreamException(e);
}
}
/**
* @throws XMLStreamException
*/
public void writeStartDocument() throws XMLStreamException {
try {
fWriter.write(DEFAULT_XMLDECL);
} catch (IOException ex) {
throw new XMLStreamException(ex);
}
}
/**
* @param version
* @throws XMLStreamException
*/
public void writeStartDocument(String version) throws XMLStreamException {
try {
if ((version == null) || version.equals("")) {
writeStartDocument();
return;
}
fWriter.write("");
} catch (IOException ex) {
throw new XMLStreamException(ex);
}
}
/**
* @param encoding
* @param version
* @throws XMLStreamException
*/
public void writeStartDocument(String encoding, String version)
throws XMLStreamException {
//Revisit : What about standalone ?
try {
if ((encoding == null) && (version == null)) {
writeStartDocument();
return;
}
if (encoding == null) {
writeStartDocument(version);
return;
}
String streamEncoding = null;
if (fWriter instanceof OutputStreamWriter) {
streamEncoding = ((OutputStreamWriter) fWriter).getEncoding();
}
else if (fWriter instanceof UTF8OutputStreamWriter) {
streamEncoding = ((UTF8OutputStreamWriter) fWriter).getEncoding();
}
else if (fWriter instanceof XMLWriter) {
streamEncoding = ((OutputStreamWriter) ((XMLWriter)fWriter).getWriter()).getEncoding();
}
if (streamEncoding != null && !streamEncoding.equalsIgnoreCase(encoding)) {
// If the equality check failed, check for charset encoding aliases
boolean foundAlias = false;
Set aliases = Charset.forName(encoding).aliases();
for (Iterator it = aliases.iterator(); !foundAlias && it.hasNext(); ) {
if (streamEncoding.equalsIgnoreCase((String) it.next())) {
foundAlias = true;
}
}
// If no alias matches the encoding name, then report error
if (!foundAlias) {
throw new XMLStreamException("Underlying stream encoding '"
+ streamEncoding
+ "' and input paramter for writeStartDocument() method '"
+ encoding + "' do not match.");
}
}
fWriter.write("");
} catch (IOException ex) {
throw new XMLStreamException(ex);
}
}
/**
* @param localName
* @throws XMLStreamException
*/
public void writeStartElement(String localName) throws XMLStreamException {
try {
if (localName == null) {
throw new XMLStreamException("Local Name cannot be null");
}
if (fStartTagOpened) {
closeStartTag();
}
openStartTag();
fElementStack.push(null, localName, null, null, false);
fInternalNamespaceContext.pushContext();
if (fIsRepairingNamespace) {
return;
}
fWriter.write(localName);
} catch (IOException ex) {
throw new XMLStreamException(ex);
}
}
/**
* @param namespaceURI
* @param localName
* @throws XMLStreamException
*/
public void writeStartElement(String namespaceURI, String localName)
throws XMLStreamException {
if (localName == null) {
throw new XMLStreamException("Local Name cannot be null");
}
if (namespaceURI == null) {
throw new XMLStreamException("NamespaceURI cannot be null");
}
namespaceURI = fSymbolTable.addSymbol(namespaceURI);
String prefix = null;
if (!fIsRepairingNamespace) {
prefix = fNamespaceContext.getPrefix(namespaceURI);
if (prefix != null) {
prefix = fSymbolTable.addSymbol(prefix);
}
}
writeStartElement(prefix, localName, namespaceURI);
}
/**
* @param prefix
* @param localName
* @param namespaceURI
* @throws XMLStreamException
*/
public void writeStartElement(String prefix, String localName,
String namespaceURI) throws XMLStreamException {
try {
if (localName == null) {
throw new XMLStreamException("Local Name cannot be null");
}
if (namespaceURI == null) {
throw new XMLStreamException("NamespaceURI cannot be null");
}
if (!fIsRepairingNamespace) {
if (prefix == null) {
throw new XMLStreamException("Prefix cannot be null");
}
}
if (fStartTagOpened) {
closeStartTag();
}
openStartTag();
namespaceURI = fSymbolTable.addSymbol(namespaceURI);
if (prefix != null) {
prefix = fSymbolTable.addSymbol(prefix);
}
fElementStack.push(prefix, localName, null, namespaceURI, false);
fInternalNamespaceContext.pushContext();
String tmpPrefix = fNamespaceContext.getPrefix(namespaceURI);
if ((prefix != null) &&
((tmpPrefix == null) || !prefix.equals(tmpPrefix))) {
fInternalNamespaceContext.declarePrefix(prefix, namespaceURI);
}
if (fIsRepairingNamespace) {
if ((prefix == null) ||
((tmpPrefix != null) && prefix.equals(tmpPrefix))) {
return;
}
QName qname = new QName();
qname.setValues(prefix, XMLConstants.XMLNS_ATTRIBUTE, null,
namespaceURI);
fNamespaceDecls.add(qname);
return;
}
if ((prefix != null) && (prefix != XMLConstants.DEFAULT_NS_PREFIX)) {
fWriter.write(prefix);
fWriter.write(":");
}
fWriter.write(localName);
} catch (IOException ex) {
throw new XMLStreamException(ex);
}
}
/**
* Writes character reference in hex format.
*/
private void writeCharRef(int codePoint) throws IOException {
fWriter.write( "&#x" );
fWriter.write( Integer.toHexString(codePoint) );
fWriter.write( ';' );
}
/**
* Writes XML content to underlying writer. Escapes characters unless
* escaping character feature is turned off.
*/
private void writeXMLContent(char[] content, int start, int length,
boolean escapeChars) throws IOException {
if (!escapeChars) {
fWriter.write(content, start, length);
return;
}
// Index of the next char to be written
int startWritePos = start;
final int end = start + length;
for (int index = start; index < end; index++) {
char ch = content[index];
if (fEncoder != null && !fEncoder.canEncode(ch)){
fWriter.write(content, startWritePos, index - startWritePos );
// Check if current and next characters forms a surrogate pair
// and escape it to avoid generation of invalid xml content
if ( index != end - 1 && Character.isSurrogatePair(ch, content[index+1])) {
writeCharRef(Character.toCodePoint(ch, content[index+1]));
index++;
} else {
writeCharRef(ch);
}
startWritePos = index + 1;
continue;
}
switch (ch) {
case '<':
fWriter.write(content, startWritePos, index - startWritePos);
fWriter.write("<");
startWritePos = index + 1;
break;
case '&':
fWriter.write(content, startWritePos, index - startWritePos);
fWriter.write("&");
startWritePos = index + 1;
break;
case '>':
fWriter.write(content, startWritePos, index - startWritePos);
fWriter.write(">");
startWritePos = index + 1;
break;
}
}
// Write any pending data
fWriter.write(content, startWritePos, end - startWritePos);
}
private void writeXMLContent(String content) throws IOException {
if ((content != null) && (content.length() > 0)) {
writeXMLContent(content,
fEscapeCharacters, // boolean = escapeChars
false); // false = escapeDoubleQuotes
}
}
/**
* Writes XML content to underlying writer. Escapes characters unless
* escaping character feature is turned off.
*/
private void writeXMLContent(
String content,
boolean escapeChars,
boolean escapeDoubleQuotes)
throws IOException {
if (!escapeChars) {
fWriter.write(content);
return;
}
// Index of the next char to be written
int startWritePos = 0;
final int end = content.length();
for (int index = 0; index < end; index++) {
char ch = content.charAt(index);
if (fEncoder != null && !fEncoder.canEncode(ch)){
fWriter.write(content, startWritePos, index - startWritePos );
// Check if current and next characters forms a surrogate pair
// and escape it to avoid generation of invalid xml content
if ( index != end - 1 && Character.isSurrogatePair(ch, content.charAt(index+1))) {
writeCharRef(Character.toCodePoint(ch, content.charAt(index+1)));
index++;
} else {
writeCharRef(ch);
}
startWritePos = index + 1;
continue;
}
switch (ch) {
case '<':
fWriter.write(content, startWritePos, index - startWritePos);
fWriter.write("<");
startWritePos = index + 1;
break;
case '&':
fWriter.write(content, startWritePos, index - startWritePos);
fWriter.write("&");
startWritePos = index + 1;
break;
case '>':
fWriter.write(content, startWritePos, index - startWritePos);
fWriter.write(">");
startWritePos = index + 1;
break;
case '"':
fWriter.write(content, startWritePos, index - startWritePos);
if (escapeDoubleQuotes) {
fWriter.write(""");
} else {
fWriter.write('"');
}
startWritePos = index + 1;
break;
}
}
// Write any pending data
fWriter.write(content, startWritePos, end - startWritePos);
}
/**
* marks close of start tag and writes the same into the writer.
*/
private void closeStartTag() throws XMLStreamException {
try {
ElementState currentElement = fElementStack.peek();
if (fIsRepairingNamespace) {
repair();
correctPrefix(currentElement, XMLStreamConstants.START_ELEMENT);
if ((currentElement.prefix != null) &&
(currentElement.prefix != XMLConstants.DEFAULT_NS_PREFIX)) {
fWriter.write(currentElement.prefix);
fWriter.write(":");
}
fWriter.write(currentElement.localpart);
int len = fNamespaceDecls.size();
QName qname = null;
for (int i = 0; i < len; i++) {
qname = (QName) fNamespaceDecls.get(i);
if (qname != null) {
if (fInternalNamespaceContext.declarePrefix(qname.prefix,
qname.uri)) {
writenamespace(qname.prefix, qname.uri);
}
}
}
fNamespaceDecls.clear();
Attribute attr = null;
for (int j = 0; j < fAttributeCache.size(); j++) {
attr = (Attribute) fAttributeCache.get(j);
if ((attr.prefix != null) && (attr.uri != null)) {
if (!attr.prefix.equals("") && !attr.uri.equals("") ) {
String tmp = fInternalNamespaceContext.getPrefix(attr.uri);
if ((tmp == null) || (tmp != attr.prefix)) {
tmp = getAttrPrefix(attr.uri);
if (tmp == null) {
if (fInternalNamespaceContext.declarePrefix(attr.prefix,
attr.uri)) {
writenamespace(attr.prefix, attr.uri);
}
} else {
writenamespace(attr.prefix, attr.uri);
}
}
}
}
writeAttributeWithPrefix(attr.prefix, attr.localpart,
attr.value);
}
fAttrNamespace = null;
fAttributeCache.clear();
}
if (currentElement.isEmpty) {
fElementStack.pop();
fInternalNamespaceContext.popContext();
fWriter.write(CLOSE_EMPTY_ELEMENT);
} else {
fWriter.write(CLOSE_START_TAG);
}
fStartTagOpened = false;
} catch (IOException ex) {
fStartTagOpened = false;
throw new XMLStreamException(ex);
}
}
/**
* marks open of start tag and writes the same into the writer.
*/
private void openStartTag() throws IOException {
fStartTagOpened = true;
fWriter.write(OPEN_START_TAG);
}
/**
*
* @param uri
* @return
*/
private void correctPrefix(QName attr, int type) {
String tmpPrefix = null;
String prefix;
String uri;
prefix = attr.prefix;
uri = attr.uri;
boolean isSpecialCaseURI = false;
if (prefix == null || prefix.equals("")) {
if (uri == null) {
return;
}
if (prefix == XMLConstants.DEFAULT_NS_PREFIX && uri == XMLConstants.DEFAULT_NS_PREFIX)
return;
uri = fSymbolTable.addSymbol(uri);
QName decl = null;
for (int i = 0; i < fNamespaceDecls.size(); i++) {
decl = (QName) fNamespaceDecls.get(i);
if ((decl != null) && (decl.uri == attr.uri)) {
attr.prefix = decl.prefix;
return;
}
}
tmpPrefix = fNamespaceContext.getPrefix(uri);
if (tmpPrefix == XMLConstants.DEFAULT_NS_PREFIX) {
if (type == XMLStreamConstants.START_ELEMENT) {
return;
}
else if (type == XMLStreamConstants.ATTRIBUTE) {
//the uri happens to be the same as that of the default namespace
tmpPrefix = getAttrPrefix(uri);
isSpecialCaseURI = true;
}
}
if (tmpPrefix == null) {
StringBuffer genPrefix = new StringBuffer("zdef");
for (int i = 0; i < 1; i++) {
genPrefix.append(fPrefixGen.nextInt());
}
prefix = genPrefix.toString();
prefix = fSymbolTable.addSymbol(prefix);
} else {
prefix = fSymbolTable.addSymbol(tmpPrefix);
}
if (tmpPrefix == null) {
if (isSpecialCaseURI) {
addAttrNamespace(prefix, uri);
} else {
QName qname = new QName();
qname.setValues(prefix, XMLConstants.XMLNS_ATTRIBUTE, null, uri);
fNamespaceDecls.add(qname);
fInternalNamespaceContext.declarePrefix(fSymbolTable.addSymbol(
prefix), uri);
}
}
}
attr.prefix = prefix;
}
/**
* return the prefix if the attribute has an uri the same as that of the default namespace
*/
private String getAttrPrefix(String uri) {
if (fAttrNamespace != null) {
return (String)fAttrNamespace.get(uri);
}
return null;
}
private void addAttrNamespace(String prefix, String uri) {
if (fAttrNamespace == null) {
fAttrNamespace = new HashMap();
}
fAttrNamespace.put(prefix, uri);
}
/**
* @param uri
* @return
*/
private boolean isDefaultNamespace(String uri) {
String defaultNamespace = fInternalNamespaceContext.getURI(DEFAULT_PREFIX);
if (uri == defaultNamespace) {
return true;
}
return false;
}
/**
* @param prefix
* @param uri
* @return
*/
private boolean checkUserNamespaceContext(String prefix, String uri) {
if (fNamespaceContext.userContext != null) {
String tmpURI = fNamespaceContext.userContext.getNamespaceURI(prefix);
if ((tmpURI != null) && tmpURI.equals(uri)) {
return true;
}
}
return false;
}
/**
* Correct's namespaces as per requirements of isReparisingNamespace property.
*/
protected void repair() {
Attribute attr = null;
Attribute attr2 = null;
ElementState currentElement = fElementStack.peek();
removeDuplicateDecls();
for(int i=0 ; i< fAttributeCache.size();i++){
attr = (Attribute)fAttributeCache.get(i);
if((attr.prefix != null && !attr.prefix.equals("")) || (attr.uri != null && !attr.uri.equals(""))) {
correctPrefix(currentElement,attr);
}
}
if (!isDeclared(currentElement)) {
if ((currentElement.prefix != null) &&
(currentElement.uri != null)) {
if ((!currentElement.prefix.equals("")) && (!currentElement.uri.equals(""))) {
fNamespaceDecls.add(currentElement);
}
}
}
for(int i=0 ; i< fAttributeCache.size();i++){
attr = (Attribute)fAttributeCache.get(i);
for(int j=i+1;j
* Note: The QName values are copied into the
* stack. In other words, the caller does not orphan
* the element to the stack. Also, the QName object returned
* is not orphaned to the caller. It should be
* considered read-only.
*
* @param element The element to push onto the stack.
*
* @return Returns the actual QName object that stores the
*/
public ElementState push(ElementState element) {
if (fDepth == fElements.length) {
ElementState[] array = new ElementState[fElements.length * 2];
System.arraycopy(fElements, 0, array, 0, fDepth);
fElements = array;
for (int i = fDepth; i < fElements.length; i++) {
fElements[i] = new ElementState();
}
}
fElements[fDepth].setValues(element);
return fElements[fDepth++];
}
/**
*
* @param prefix
* @param localpart
* @param rawname
* @param uri
* @param isEmpty
* @return
*/
public ElementState push(String prefix, String localpart,
String rawname, String uri, boolean isEmpty) {
if (fDepth == fElements.length) {
ElementState[] array = new ElementState[fElements.length * 2];
System.arraycopy(fElements, 0, array, 0, fDepth);
fElements = array;
for (int i = fDepth; i < fElements.length; i++) {
fElements[i] = new ElementState();
}
}
fElements[fDepth].setValues(prefix, localpart, rawname, uri, isEmpty);
return fElements[fDepth++];
}
/**
* Pops an element off of the stack by setting the values of
* the specified QName.
*
* Note: The object returned is not
* orphaned to the caller. Therefore, the caller should consider
* the object to be read-only.
*/
public ElementState pop() {
return fElements[--fDepth];
}
/** Clears the stack without throwing away existing QName objects. */
public void clear() {
fDepth = 0;
}
/**
* This function is as a result of optimization done for endElement --
* we dont need to set the value for every end element we encouter.
* For Well formedness checks we can have the same QName object that was pushed.
* the values will be set only if application need to know about the endElement
* -- [email protected]
*/
public ElementState peek() {
return fElements[fDepth - 1];
}
/**
*
* @return
*/
public boolean empty() {
return (fDepth > 0) ? false : true;
}
}
/**
* Maintains element state . localName for now.
*/
class ElementState extends QName {
public boolean isEmpty = false;
public ElementState() {}
public ElementState(String prefix, String localpart, String rawname,
String uri) {
super(prefix, localpart, rawname, uri);
}
public void setValues(String prefix, String localpart, String rawname,
String uri, boolean isEmpty) {
super.setValues(prefix, localpart, rawname, uri);
this.isEmpty = isEmpty;
}
}
/**
* Attributes
*/
class Attribute extends QName {
String value;
Attribute(String value) {
super();
this.value = value;
}
}
/**
* Implementation of NamespaceContext .
*
*/
class NamespaceContextImpl implements NamespaceContext {
//root namespace context set by user.
NamespaceContext userContext = null;
//context built by the writer.
NamespaceSupport internalContext = null;
public String getNamespaceURI(String prefix) {
String uri = null;
if (prefix != null) {
prefix = fSymbolTable.addSymbol(prefix);
}
if (internalContext != null) {
uri = internalContext.getURI(prefix);
if (uri != null) {
return uri;
}
}
if (userContext != null) {
uri = userContext.getNamespaceURI(prefix);
return uri;
}
return null;
}
public String getPrefix(String uri) {
String prefix = null;
if (uri != null) {
uri = fSymbolTable.addSymbol(uri);
}
if (internalContext != null) {
prefix = internalContext.getPrefix(uri);
if (prefix != null) {
return prefix;
}
}
if (userContext != null) {
return userContext.getPrefix(uri);
}
return null;
}
public java.util.Iterator getPrefixes(String uri) {
Vector prefixes = null;
Iterator itr = null;
if (uri != null) {
uri = fSymbolTable.addSymbol(uri);
}
if (userContext != null) {
itr = userContext.getPrefixes(uri);
}
if (internalContext != null) {
prefixes = internalContext.getPrefixes(uri);
}
if ((prefixes == null) && (itr != null)) {
return itr;
} else if ((prefixes != null) && (itr == null)) {
return new ReadOnlyIterator(prefixes.iterator());
} else if ((prefixes != null) && (itr != null)) {
String ob = null;
while (itr.hasNext()) {
ob = (String) itr.next();
if (ob != null) {
ob = fSymbolTable.addSymbol(ob);
}
if (!prefixes.contains(ob)) {
prefixes.add(ob);
}
}
return new ReadOnlyIterator(prefixes.iterator());
}
return fReadOnlyIterator;
}
}
// -- Map Interface --------------------------------------------------
public int size() {
return 1;
}
public boolean isEmpty() {
return false;
}
public boolean containsKey(Object key) {
return key.equals(OUTPUTSTREAM_PROPERTY);
}
/**
* Returns the value associated to an implementation-specific
* property.
*/
public Object get(Object key) {
if (key.equals(OUTPUTSTREAM_PROPERTY)) {
return fOutputStream;
}
return null;
}
public java.util.Set entrySet() {
throw new UnsupportedOperationException();
}
/**
* Overrides the method defined in AbstractMap which is
* not completely implemented. Calling toString() in
* AbstractMap would cause an unsupported exection to
* be thrown.
*/
public String toString() {
return getClass().getName() + "@" + Integer.toHexString(hashCode());
}
/**
* Overrides the method defined in AbstractMap
* This is required by the toString() method
*/
public int hashCode() {
return fElementStack.hashCode();
}
/**
* Overrides the method defined in AbstractMap
* This is required to satisfy the contract for hashCode.
*/
public boolean equals(Object obj) {
return (this == obj);
}
}
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