/*
 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
 */
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

package com.sun.org.apache.xalan.internal.xsltc.dom;

import com.sun.org.apache.xalan.internal.xsltc.DOM;
import com.sun.org.apache.xalan.internal.xsltc.StripFilter;
import com.sun.org.apache.xalan.internal.xsltc.TransletException;
import com.sun.org.apache.xml.internal.dtm.Axis;
import com.sun.org.apache.xml.internal.dtm.DTM;
import com.sun.org.apache.xml.internal.dtm.DTMAxisIterator;
import com.sun.org.apache.xml.internal.dtm.DTMAxisTraverser;
import com.sun.org.apache.xml.internal.dtm.DTMManager;
import com.sun.org.apache.xml.internal.dtm.ref.DTMAxisIteratorBase;
import com.sun.org.apache.xml.internal.dtm.ref.DTMManagerDefault;
import com.sun.org.apache.xml.internal.serializer.EmptySerializer;
import com.sun.org.apache.xml.internal.serializer.SerializationHandler;
import com.sun.org.apache.xml.internal.utils.XMLString;
import com.sun.org.apache.xml.internal.utils.XMLStringDefault;
import java.util.Map;
import javax.xml.transform.SourceLocator;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

This class represents a light-weight DOM model for simple result tree fragment(RTF).
A simple RTF is an RTF that has only one Text node. The Text node can be produced by a
combination of Text, xsl:value-of and xsl:number instructions. It can also be produced
by a control structure (xsl:if or xsl:choose) whose body is pure Text.

A SimpleResultTreeImpl has only two nodes, i.e. the ROOT node and its Text child. All DOM
interfaces are overridden with this in mind. For example, the getStringValue() interface
returns the value of the Text node. This class receives the character data from the
characters() interface.

This class implements DOM and SerializationHandler. It also implements the DTM interface
for support in MultiDOM. The nested iterators (SimpleIterator and SingletonIterator) are
used to support the nodeset() extension function.
/**
 * This class represents a light-weight DOM model for simple result tree fragment(RTF).
 * A simple RTF is an RTF that has only one Text node. The Text node can be produced by a
 * combination of Text, xsl:value-of and xsl:number instructions. It can also be produced
 * by a control structure (xsl:if or xsl:choose) whose body is pure Text.
 * <p>
 * A SimpleResultTreeImpl has only two nodes, i.e. the ROOT node and its Text child. All DOM
 * interfaces are overridden with this in mind. For example, the getStringValue() interface
 * returns the value of the Text node. This class receives the character data from the
 * characters() interface.
 * <p>
 * This class implements DOM and SerializationHandler. It also implements the DTM interface
 * for support in MultiDOM. The nested iterators (SimpleIterator and SingletonIterator) are
 * used to support the nodeset() extension function.
 */
public class SimpleResultTreeImpl extends EmptySerializer implements DOM, DTM
{

    
The SimpleIterator is designed to support the nodeset() extension function. It has
a traversal direction parameter. The DOWN direction is used for child and descendant
axes, while the UP direction is used for parent and ancestor axes.
This iterator only handles two nodes (RTF_ROOT and RTF_TEXT). If the type is set,
it will also match the node type with the given type.
/**
     * The SimpleIterator is designed to support the nodeset() extension function. It has
     * a traversal direction parameter. The DOWN direction is used for child and descendant
     * axes, while the UP direction is used for parent and ancestor axes.
     *
     * This iterator only handles two nodes (RTF_ROOT and RTF_TEXT). If the type is set,
     * it will also match the node type with the given type.
     */
    public final class SimpleIterator extends DTMAxisIteratorBase
    {
        static final int DIRECTION_UP = 0;
        static final int DIRECTION_DOWN = 1;
        static final int NO_TYPE = -1;

        // The direction of traversal (default to DOWN).
        // DOWN is for child and descendant. UP is for parent and ancestor.
        int _direction = DIRECTION_DOWN;

        int _type = NO_TYPE;
        int _currentNode;

        public SimpleIterator()
        {
        }

        public SimpleIterator(int direction)
        {
            _direction = direction;
        }

        public SimpleIterator(int direction, int type)
        {
             _direction = direction;
             _type = type;
        }

        public int next()
        {
            // Increase the node ID for down traversal. Also match the node type
            // if the type is given.
            if (_direction == DIRECTION_DOWN) {
                while (_currentNode < NUMBER_OF_NODES) {
                    if (_type != NO_TYPE) {
                        if ((_currentNode == RTF_ROOT && _type == DTM.ROOT_NODE)
                            || (_currentNode == RTF_TEXT && _type == DTM.TEXT_NODE))
                            return returnNode(getNodeHandle(_currentNode++));
                        else
                            _currentNode++;
                    }
                    else
                        return returnNode(getNodeHandle(_currentNode++));
                }

                return END;
            }
            // Decrease the node ID for up traversal.
            else {
                while (_currentNode >= 0) {
                    if (_type != NO_TYPE) {
                        if ((_currentNode == RTF_ROOT && _type == DTM.ROOT_NODE)
                            || (_currentNode == RTF_TEXT && _type == DTM.TEXT_NODE))
                            return returnNode(getNodeHandle(_currentNode--));
                        else
                            _currentNode--;
                    }
                    else
                        return returnNode(getNodeHandle(_currentNode--));
                }

                return END;
            }
        }

        public DTMAxisIterator setStartNode(int nodeHandle)
        {
            int nodeID = getNodeIdent(nodeHandle);
            _startNode = nodeID;

            // Increase the node ID by 1 if self is not included.
            if (!_includeSelf && nodeID != DTM.NULL) {
                if (_direction == DIRECTION_DOWN)
                    nodeID++;
                else if (_direction == DIRECTION_UP)
                    nodeID--;
            }

            _currentNode = nodeID;
            return this;
        }

        public void setMark()
        {
            _markedNode = _currentNode;
        }

        public void gotoMark()
        {
            _currentNode = _markedNode;
        }

    } // END of SimpleIterator

    
The SingletonIterator is used for the self axis.
/**
     * The SingletonIterator is used for the self axis.
     */
    public final class SingletonIterator extends DTMAxisIteratorBase
    {
        static final int NO_TYPE = -1;
        int _type = NO_TYPE;
        int _currentNode;

        public SingletonIterator()
        {
        }

        public SingletonIterator(int type)
        {
            _type = type;
        }

        public void setMark()
        {
            _markedNode = _currentNode;
        }

        public void gotoMark()
        {
            _currentNode = _markedNode;
        }

        public DTMAxisIterator setStartNode(int nodeHandle)
        {
            _currentNode = _startNode = getNodeIdent(nodeHandle);
            return this;
        }

        public int next()
        {
            if (_currentNode == END)
                return END;

            _currentNode = END;

            if (_type != NO_TYPE) {
                if ((_currentNode == RTF_ROOT && _type == DTM.ROOT_NODE)
                    || (_currentNode == RTF_TEXT && _type == DTM.TEXT_NODE))
                    return getNodeHandle(_currentNode);
            }
            else
                return getNodeHandle(_currentNode);

            return END;
        }

    }  // END of SingletonIterator

    // empty iterator to be returned when there are no children
    private final static DTMAxisIterator EMPTY_ITERATOR =
        new DTMAxisIteratorBase() {
            public DTMAxisIterator reset() { return this; }
            public DTMAxisIterator setStartNode(int node) { return this; }
            public int next() { return DTM.NULL; }
            public void setMark() {}
            public void gotoMark() {}
            public int getLast() { return 0; }
            public int getPosition() { return 0; }
            public DTMAxisIterator cloneIterator() { return this; }
            public void setRestartable(boolean isRestartable) { }
        };


    // The root node id of the simple RTF
    public static final int RTF_ROOT = 0;

    // The Text node id of the simple RTF (simple RTF has only one Text node).
    public static final int RTF_TEXT = 1;

    // The number of nodes.
    public static final int NUMBER_OF_NODES = 2;

    // Document URI index, which increases by 1 at each getDocumentURI() call.
    private static int _documentURIIndex = 0;

    // Constant for empty String
    private static final String EMPTY_STR = "";

    // The String value of the Text node.
    // This is set at the endDocument() call.
    private String _text;

    // The array of Text items, which is built by the characters() call.
    // The characters() interface can be called multiple times. Each character item
    // can have different escape settings.
    protected String[] _textArray;

    // The DTMManager
    protected XSLTCDTMManager _dtmManager;

    // Number of character items
    protected int _size = 0;

    // The document ID
    private int _documentID;

    // A BitArray, each bit holding the escape setting for a character item.
    private BitArray _dontEscape = null;

    // The current escape setting
    private boolean _escaping = true;

    // Create a SimpleResultTreeImpl from a DTMManager and a document ID.
    public SimpleResultTreeImpl(XSLTCDTMManager dtmManager, int documentID)
    {
        _dtmManager = dtmManager;
        _documentID = documentID;
        _textArray = new String[4];
    }

    public DTMManagerDefault getDTMManager()
    {
        return _dtmManager;
    }

    // Return the document ID
    public int getDocument()
    {
        return _documentID;
    }

    // Return the String value of the RTF
    public String getStringValue()
    {
        return _text;
    }

    public DTMAxisIterator getIterator()
    {
        return new SingletonIterator(getDocument());
    }

    public DTMAxisIterator getChildren(final int node)
    {
        return new SimpleIterator().setStartNode(node);
    }

    public DTMAxisIterator getTypedChildren(final int type)
    {
        return new SimpleIterator(SimpleIterator.DIRECTION_DOWN, type);
    }

    // Return the axis iterator for a given axis.
    // The SimpleIterator is used for the child, descendant, parent and ancestor axes.
    public DTMAxisIterator getAxisIterator(final int axis)
    {
        switch (axis)
        {
            case Axis.CHILD:
            case Axis.DESCENDANT:
                return new SimpleIterator(SimpleIterator.DIRECTION_DOWN);
            case Axis.PARENT:
            case Axis.ANCESTOR:
                return new SimpleIterator(SimpleIterator.DIRECTION_UP);
            case Axis.ANCESTORORSELF:
                return (new SimpleIterator(SimpleIterator.DIRECTION_UP)).includeSelf();
            case Axis.DESCENDANTORSELF:
                return (new SimpleIterator(SimpleIterator.DIRECTION_DOWN)).includeSelf();
            case Axis.SELF:
                return new SingletonIterator();
            default:
                return EMPTY_ITERATOR;
        }
    }

    public DTMAxisIterator getTypedAxisIterator(final int axis, final int type)
    {
        switch (axis)
        {
            case Axis.CHILD:
            case Axis.DESCENDANT:
                return new SimpleIterator(SimpleIterator.DIRECTION_DOWN, type);
            case Axis.PARENT:
            case Axis.ANCESTOR:
                return new SimpleIterator(SimpleIterator.DIRECTION_UP, type);
            case Axis.ANCESTORORSELF:
                return (new SimpleIterator(SimpleIterator.DIRECTION_UP, type)).includeSelf();
            case Axis.DESCENDANTORSELF:
                return (new SimpleIterator(SimpleIterator.DIRECTION_DOWN, type)).includeSelf();
            case Axis.SELF:
                return new SingletonIterator(type);
            default:
                return EMPTY_ITERATOR;
        }
    }

    // %REVISIT% Can this one ever get used?
    public DTMAxisIterator getNthDescendant(int node, int n, boolean includeself)
    {
        return null;
    }

    public DTMAxisIterator getNamespaceAxisIterator(final int axis, final int ns)
    {
        return null;
    }

    // %REVISIT% Can this one ever get used?
    public DTMAxisIterator getNodeValueIterator(DTMAxisIterator iter, int returnType,
                                             String value, boolean op)
    {
        return null;
    }

    public DTMAxisIterator orderNodes(DTMAxisIterator source, int node)
    {
        return source;
    }

    public String getNodeName(final int node)
    {
        if (getNodeIdent(node) == RTF_TEXT)
            return "#text";
        else
            return EMPTY_STR;
    }

    public String getNodeNameX(final int node)
    {
        return EMPTY_STR;
    }

    public String getNamespaceName(final int node)
    {
        return EMPTY_STR;
    }

    // Return the expanded type id of a given node
    public int getExpandedTypeID(final int nodeHandle)
    {
        int nodeID = getNodeIdent(nodeHandle);
        if (nodeID == RTF_TEXT)
            return DTM.TEXT_NODE;
        else if (nodeID == RTF_ROOT)
            return DTM.ROOT_NODE;
        else
            return DTM.NULL;
    }

    public int getNamespaceType(final int node)
    {
        return 0;
    }

    public int getParent(final int nodeHandle)
    {
        int nodeID = getNodeIdent(nodeHandle);
        return (nodeID == RTF_TEXT) ? getNodeHandle(RTF_ROOT) : DTM.NULL;
    }

    public int getAttributeNode(final int gType, final int element)
    {
        return DTM.NULL;
    }

    public String getStringValueX(final int nodeHandle)
    {
        int nodeID = getNodeIdent(nodeHandle);
        if (nodeID == RTF_ROOT || nodeID == RTF_TEXT)
            return _text;
        else
            return EMPTY_STR;
    }

    public void copy(final int node, SerializationHandler handler)
        throws TransletException
    {
        characters(node, handler);
    }

    public void copy(DTMAxisIterator nodes, SerializationHandler handler)
        throws TransletException
    {
        int node;
        while ((node = nodes.next()) != DTM.NULL)
        {
            copy(node, handler);
        }
    }

    public String shallowCopy(final int node, SerializationHandler handler)
        throws TransletException
    {
        characters(node, handler);
        return null;
    }

    public boolean lessThan(final int node1, final int node2)
    {
        if (node1 == DTM.NULL) {
            return false;
        }
        else if (node2 == DTM.NULL) {
            return true;
        }
        else
            return (node1 < node2);
    }

    
Dispatch the character content of a node to an output handler.
The escape setting should be taken care of when outputting to
a handler.
/**
     * Dispatch the character content of a node to an output handler.
     *
     * The escape setting should be taken care of when outputting to
     * a handler.
     */
    public void characters(final int node, SerializationHandler handler)
        throws TransletException
    {
        int nodeID = getNodeIdent(node);
        if (nodeID == RTF_ROOT || nodeID == RTF_TEXT) {
            boolean escapeBit = false;
            boolean oldEscapeSetting = false;

            try {
                for (int i = 0; i < _size; i++) {

                    if (_dontEscape != null) {
                        escapeBit = _dontEscape.getBit(i);
                        if (escapeBit) {
                            oldEscapeSetting = handler.setEscaping(false);
                        }
                    }

                    handler.characters(_textArray[i]);

                    if (escapeBit) {
                        handler.setEscaping(oldEscapeSetting);
                    }
                }
            } catch (SAXException e) {
                throw new TransletException(e);
            }
        }
    }

    // %REVISIT% Can the makeNode() and makeNodeList() interfaces ever get used?
    public Node makeNode(int index)
    {
        return null;
    }

    public Node makeNode(DTMAxisIterator iter)
    {
        return null;
    }

    public NodeList makeNodeList(int index)
    {
        return null;
    }

    public NodeList makeNodeList(DTMAxisIterator iter)
    {
        return null;
    }

    public String getLanguage(int node)
    {
        return null;
    }

    public int getSize()
    {
        return 2;
    }

    public String getDocumentURI(int node)
    {
        return "simple_rtf" + _documentURIIndex++;
    }

    public void setFilter(StripFilter filter)
    {
    }

    public void setupMapping(String[] names, String[] uris, int[] types, String[] namespaces)
    {
    }

    public boolean isElement(final int node)
    {
        return false;
    }

    public boolean isAttribute(final int node)
    {
        return false;
    }

    public String lookupNamespace(int node, String prefix)
        throws TransletException
    {
        return null;
    }

    
Return the node identity from a node handle.
/**
     * Return the node identity from a node handle.
     */
    public int getNodeIdent(final int nodehandle)
    {
        return (nodehandle != DTM.NULL) ? (nodehandle - _documentID) : DTM.NULL;
    }

    
Return the node handle from a node identity.
/**
     * Return the node handle from a node identity.
     */
    public int getNodeHandle(final int nodeId)
    {
        return (nodeId != DTM.NULL) ? (nodeId + _documentID) : DTM.NULL;
    }

    public DOM getResultTreeFrag(int initialSize, int rtfType)
    {
        return null;
    }

    public DOM getResultTreeFrag(int initialSize, int rtfType, boolean addToManager)
    {
        return null;
    }

    public SerializationHandler getOutputDomBuilder()
    {
        return this;
    }

    public int getNSType(int node)
    {
        return 0;
    }

    public String getUnparsedEntityURI(String name)
    {
        return null;
    }

    public Map<String, Integer> getElementsWithIDs()
    {
        return null;
    }

    /** Implementation of the SerializationHandler interfaces **/

    
We only need to override the endDocument, characters, and
setEscaping interfaces. A simple RTF does not have element
nodes. We do not need to touch startElement and endElement.
/**
     * We only need to override the endDocument, characters, and
     * setEscaping interfaces. A simple RTF does not have element
     * nodes. We do not need to touch startElement and endElement.
     */

    public void startDocument() throws SAXException
    {

    }

    public void endDocument() throws SAXException
    {
        // Set the String value when the document is built.
        if (_size == 1)
            _text = _textArray[0];
        else {
            StringBuffer buffer = new StringBuffer();
            for (int i = 0; i < _size; i++) {
                buffer.append(_textArray[i]);
            }
            _text = buffer.toString();
        }
    }

    public void characters(String str) throws SAXException
    {
        // Resize the text array if necessary
        if (_size >= _textArray.length) {
            String[] newTextArray = new String[_textArray.length * 2];
            System.arraycopy(_textArray, 0, newTextArray, 0, _textArray.length);
            _textArray = newTextArray;
        }

        // If the escape setting is false, set the corresponding bit in
        // the _dontEscape BitArray.
        if (!_escaping) {
            // The _dontEscape array is only created when needed.
            if (_dontEscape == null) {
                _dontEscape = new BitArray(8);
            }

            // Resize the _dontEscape array if necessary
            if (_size >= _dontEscape.size())
                _dontEscape.resize(_dontEscape.size() * 2);

            _dontEscape.setBit(_size);
        }

        _textArray[_size++] = str;
    }

    public void characters(char[] ch, int offset, int length)
        throws SAXException
    {
        if (_size >= _textArray.length) {
            String[] newTextArray = new String[_textArray.length * 2];
            System.arraycopy(_textArray, 0, newTextArray, 0, _textArray.length);
            _textArray = newTextArray;
        }

        if (!_escaping) {
            if (_dontEscape == null) {
                _dontEscape = new BitArray(8);
            }

            if (_size >= _dontEscape.size())
                _dontEscape.resize(_dontEscape.size() * 2);

            _dontEscape.setBit(_size);
        }

        _textArray[_size++] = new String(ch, offset, length);

    }

    public boolean setEscaping(boolean escape) throws SAXException
    {
        final boolean temp = _escaping;
        _escaping = escape;
        return temp;
    }

    /** Implementation of the DTM interfaces **/

    
The DTM interfaces are not used in this class. Implementing the DTM
interface is a requirement from MultiDOM. If we have a better way
of handling multiple documents, we can get rid of the DTM dependency.
The following interfaces are just placeholders. The implementation
does not have an impact because they will not be used.
/**
     * The DTM interfaces are not used in this class. Implementing the DTM
     * interface is a requirement from MultiDOM. If we have a better way
     * of handling multiple documents, we can get rid of the DTM dependency.
     *
     * The following interfaces are just placeholders. The implementation
     * does not have an impact because they will not be used.
     */

    public void setFeature(String featureId, boolean state)
    {
    }

    public void setProperty(String property, Object value)
    {
    }

    public DTMAxisTraverser getAxisTraverser(final int axis)
    {
        return null;
    }

    public boolean hasChildNodes(int nodeHandle)
    {
        return (getNodeIdent(nodeHandle) == RTF_ROOT);
    }

    public int getFirstChild(int nodeHandle)
    {
        int nodeID = getNodeIdent(nodeHandle);
        if (nodeID == RTF_ROOT)
            return getNodeHandle(RTF_TEXT);
        else
            return DTM.NULL;
    }

    public int getLastChild(int nodeHandle)
    {
        return getFirstChild(nodeHandle);
    }

    public int getAttributeNode(int elementHandle, String namespaceURI, String name)
    {
        return DTM.NULL;
    }

    public int getFirstAttribute(int nodeHandle)
    {
        return DTM.NULL;
    }

    public int getFirstNamespaceNode(int nodeHandle, boolean inScope)
    {
        return DTM.NULL;
    }

    public int getNextSibling(int nodeHandle)
    {
        return DTM.NULL;
    }

    public int getPreviousSibling(int nodeHandle)
    {
        return DTM.NULL;
    }

    public int getNextAttribute(int nodeHandle)
    {
        return DTM.NULL;
    }

    public int getNextNamespaceNode(int baseHandle, int namespaceHandle,
                                  boolean inScope)
    {
        return DTM.NULL;
    }

    public int getOwnerDocument(int nodeHandle)
    {
        return getDocument();
    }

    public int getDocumentRoot(int nodeHandle)
    {
        return getDocument();
    }

    public XMLString getStringValue(int nodeHandle)
    {
        return new XMLStringDefault(getStringValueX(nodeHandle));
    }

    public int getStringValueChunkCount(int nodeHandle)
    {
        return 0;
    }

    public char[] getStringValueChunk(int nodeHandle, int chunkIndex,
                                    int[] startAndLen)
    {
        return null;
    }

    public int getExpandedTypeID(String namespace, String localName, int type)
    {
        return DTM.NULL;
    }

    public String getLocalNameFromExpandedNameID(int ExpandedNameID)
    {
        return EMPTY_STR;
    }

    public String getNamespaceFromExpandedNameID(int ExpandedNameID)
    {
        return EMPTY_STR;
    }

    public String getLocalName(int nodeHandle)
    {
        return EMPTY_STR;
    }

    public String getPrefix(int nodeHandle)
    {
        return null;
    }

    public String getNamespaceURI(int nodeHandle)
    {
        return EMPTY_STR;
    }

    public String getNodeValue(int nodeHandle)
    {
        return (getNodeIdent(nodeHandle) == RTF_TEXT) ? _text : null;
    }

    public short getNodeType(int nodeHandle)
    {
        int nodeID = getNodeIdent(nodeHandle);
        if (nodeID == RTF_TEXT)
            return DTM.TEXT_NODE;
        else if (nodeID == RTF_ROOT)
            return DTM.ROOT_NODE;
        else
            return DTM.NULL;

    }

    public short getLevel(int nodeHandle)
    {
        int nodeID = getNodeIdent(nodeHandle);
        if (nodeID == RTF_TEXT)
            return 2;
        else if (nodeID == RTF_ROOT)
            return 1;
        else
            return DTM.NULL;
    }

    public boolean isSupported(String feature, String version)
    {
        return false;
    }

    public String getDocumentBaseURI()
    {
        return EMPTY_STR;
    }

    public void setDocumentBaseURI(String baseURI)
    {
    }

    public String getDocumentSystemIdentifier(int nodeHandle)
    {
        return null;
    }

    public String getDocumentEncoding(int nodeHandle)
    {
        return null;
    }

    public String getDocumentStandalone(int nodeHandle)
    {
        return null;
    }

    public String getDocumentVersion(int documentHandle)
    {
        return null;
    }

    public boolean getDocumentAllDeclarationsProcessed()
    {
        return false;
    }

    public String getDocumentTypeDeclarationSystemIdentifier()
    {
        return null;
    }

    public String getDocumentTypeDeclarationPublicIdentifier()
    {
        return null;
    }

    public int getElementById(String elementId)
    {
        return DTM.NULL;
    }

    public boolean supportsPreStripping()
    {
        return false;
    }

    public boolean isNodeAfter(int firstNodeHandle, int secondNodeHandle)
    {
        return lessThan(firstNodeHandle, secondNodeHandle);
    }

    public boolean isCharacterElementContentWhitespace(int nodeHandle)
    {
        return false;
    }

    public boolean isDocumentAllDeclarationsProcessed(int documentHandle)
    {
        return false;
    }

    public boolean isAttributeSpecified(int attributeHandle)
    {
        return false;
    }

    public void dispatchCharactersEvents(
        int nodeHandle,
        org.xml.sax.ContentHandler ch,
        boolean normalize)
          throws org.xml.sax.SAXException
    {
    }

    public void dispatchToEvents(int nodeHandle, org.xml.sax.ContentHandler ch)
      throws org.xml.sax.SAXException
    {
    }

    public org.w3c.dom.Node getNode(int nodeHandle)
    {
        return makeNode(nodeHandle);
    }

    public boolean needsTwoThreads()
    {
        return false;
    }

    public org.xml.sax.ContentHandler getContentHandler()
    {
        return null;
    }

    public org.xml.sax.ext.LexicalHandler getLexicalHandler()
    {
        return null;
    }

    public org.xml.sax.EntityResolver getEntityResolver()
    {
        return null;
    }

    public org.xml.sax.DTDHandler getDTDHandler()
    {
        return null;
    }

    public org.xml.sax.ErrorHandler getErrorHandler()
    {
        return null;
    }

    public org.xml.sax.ext.DeclHandler getDeclHandler()
    {
        return null;
    }

    public void appendChild(int newChild, boolean clone, boolean cloneDepth)
    {
    }

    public void appendTextChild(String str)
    {
    }

    public SourceLocator getSourceLocatorFor(int node)
    {
        return null;
    }

    public void documentRegistration()
    {
    }

    public void documentRelease()
    {
    }

    public void migrateTo(DTMManager manager)
    {
    }

    public void release()
    {
        if (_documentID != 0) {
            _dtmManager.release(this, true);
            _documentID = 0;
        }
    }
}