/*
 * Copyright (c) 2017, 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.xerces.internal.parsers;

import com.sun.org.apache.xerces.internal.dom.AttrImpl;
import com.sun.org.apache.xerces.internal.dom.CoreDocumentImpl;
import com.sun.org.apache.xerces.internal.dom.DOMErrorImpl;
import com.sun.org.apache.xerces.internal.dom.DOMMessageFormatter;
import com.sun.org.apache.xerces.internal.dom.DeferredDocumentImpl;
import com.sun.org.apache.xerces.internal.dom.DocumentImpl;
import com.sun.org.apache.xerces.internal.dom.DocumentTypeImpl;
import com.sun.org.apache.xerces.internal.dom.ElementDefinitionImpl;
import com.sun.org.apache.xerces.internal.dom.ElementImpl;
import com.sun.org.apache.xerces.internal.dom.ElementNSImpl;
import com.sun.org.apache.xerces.internal.dom.EntityImpl;
import com.sun.org.apache.xerces.internal.dom.EntityReferenceImpl;
import com.sun.org.apache.xerces.internal.dom.NodeImpl;
import com.sun.org.apache.xerces.internal.dom.NotationImpl;
import com.sun.org.apache.xerces.internal.dom.PSVIAttrNSImpl;
import com.sun.org.apache.xerces.internal.dom.PSVIDocumentImpl;
import com.sun.org.apache.xerces.internal.dom.PSVIElementNSImpl;
import com.sun.org.apache.xerces.internal.dom.TextImpl;
import com.sun.org.apache.xerces.internal.impl.Constants;
import com.sun.org.apache.xerces.internal.impl.dv.XSSimpleType;
import com.sun.org.apache.xerces.internal.util.DOMErrorHandlerWrapper;
import com.sun.org.apache.xerces.internal.utils.ObjectFactory;
import com.sun.org.apache.xerces.internal.xni.Augmentations;
import com.sun.org.apache.xerces.internal.xni.NamespaceContext;
import com.sun.org.apache.xerces.internal.xni.QName;
import com.sun.org.apache.xerces.internal.xni.XMLAttributes;
import com.sun.org.apache.xerces.internal.xni.XMLLocator;
import com.sun.org.apache.xerces.internal.xni.XMLResourceIdentifier;
import com.sun.org.apache.xerces.internal.xni.XMLString;
import com.sun.org.apache.xerces.internal.xni.XNIException;
import com.sun.org.apache.xerces.internal.xni.parser.XMLParserConfiguration;
import com.sun.org.apache.xerces.internal.xs.AttributePSVI;
import com.sun.org.apache.xerces.internal.xs.ElementPSVI;
import com.sun.org.apache.xerces.internal.xs.XSTypeDefinition;
import java.util.Locale;
import java.util.Stack;
import org.w3c.dom.Attr;
import org.w3c.dom.CDATASection;
import org.w3c.dom.Comment;
import org.w3c.dom.DOMError;
import org.w3c.dom.Document;
import org.w3c.dom.DocumentType;
import org.w3c.dom.Element;
import org.w3c.dom.EntityReference;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.ProcessingInstruction;
import org.w3c.dom.Text;
import org.w3c.dom.ls.LSParserFilter;
import org.w3c.dom.traversal.NodeFilter;
import org.xml.sax.SAXException;

This is the base class of all DOM parsers. It implements the XNI
callback methods to create the DOM tree. After a successful parse of
an XML document, the DOM Document object can be queried using the
getDocument method. The actual pipeline is defined in
parser configuration.
Author:
Arnaud Le Hors, IBM, Andy Clark, IBM, Elena Litani, IBM
@LastModified
: Nov 2017/**
 * This is the base class of all DOM parsers. It implements the XNI
 * callback methods to create the DOM tree. After a successful parse of
 * an XML document, the DOM Document object can be queried using the
 * <code>getDocument</code> method. The actual pipeline is defined in
 * parser configuration.
 *
 * @author Arnaud Le Hors, IBM
 * @author Andy Clark, IBM
 * @author Elena Litani, IBM
 *
 * @LastModified: Nov 2017
 */
public class AbstractDOMParser extends AbstractXMLDocumentParser {

    //
    // Constants
    //

    // feature ids

    
Feature id: namespace. /** Feature id: namespace. */
    protected static final String NAMESPACES =
    Constants.SAX_FEATURE_PREFIX+Constants.NAMESPACES_FEATURE;

    
Feature id: create entity ref nodes. /** Feature id: create entity ref nodes. */
    protected static final String CREATE_ENTITY_REF_NODES =
    Constants.XERCES_FEATURE_PREFIX + Constants.CREATE_ENTITY_REF_NODES_FEATURE;

    
Feature id: include comments. /** Feature id: include comments. */
    protected static final String INCLUDE_COMMENTS_FEATURE =
    Constants.XERCES_FEATURE_PREFIX + Constants.INCLUDE_COMMENTS_FEATURE;

    
Feature id: create cdata nodes. /** Feature id: create cdata nodes. */
    protected static final String CREATE_CDATA_NODES_FEATURE =
    Constants.XERCES_FEATURE_PREFIX + Constants.CREATE_CDATA_NODES_FEATURE;

    
Feature id: include ignorable whitespace. /** Feature id: include ignorable whitespace. */
    protected static final String INCLUDE_IGNORABLE_WHITESPACE =
    Constants.XERCES_FEATURE_PREFIX + Constants.INCLUDE_IGNORABLE_WHITESPACE;

    
Feature id: defer node expansion. /** Feature id: defer node expansion. */
    protected static final String DEFER_NODE_EXPANSION =
    Constants.XERCES_FEATURE_PREFIX + Constants.DEFER_NODE_EXPANSION_FEATURE;


    
Recognized features. /** Recognized features. */
    private static final String[] RECOGNIZED_FEATURES = {
        NAMESPACES,
        CREATE_ENTITY_REF_NODES,
        INCLUDE_COMMENTS_FEATURE,
        CREATE_CDATA_NODES_FEATURE,
        INCLUDE_IGNORABLE_WHITESPACE,
        DEFER_NODE_EXPANSION
    };

    // property ids

    
Property id: document class name. /** Property id: document class name. */
    protected static final String DOCUMENT_CLASS_NAME =
    Constants.XERCES_PROPERTY_PREFIX + Constants.DOCUMENT_CLASS_NAME_PROPERTY;

    protected static final String  CURRENT_ELEMENT_NODE=
    Constants.XERCES_PROPERTY_PREFIX + Constants.CURRENT_ELEMENT_NODE_PROPERTY;

    // protected static final String GRAMMAR_POOL =
    // Constants.XERCES_PROPERTY_PREFIX + Constants.XMLGRAMMAR_POOL_PROPERTY;

    
Recognized properties. /** Recognized properties. */
    private static final String[] RECOGNIZED_PROPERTIES = {
        DOCUMENT_CLASS_NAME,
        CURRENT_ELEMENT_NODE,
    };

    // other

    
Default document class name. /** Default document class name. */
    protected static final String DEFAULT_DOCUMENT_CLASS_NAME =
    "com.sun.org.apache.xerces.internal.dom.DocumentImpl";

    protected static final String CORE_DOCUMENT_CLASS_NAME =
    "com.sun.org.apache.xerces.internal.dom.CoreDocumentImpl";

    protected static final String PSVI_DOCUMENT_CLASS_NAME =
    "com.sun.org.apache.xerces.internal.dom.PSVIDocumentImpl";

    
If the user stops the process, this exception will be thrown.
/**
     * If the user stops the process, this exception will be thrown.
     */
    static final class Abort extends RuntimeException {
        private static final long serialVersionUID = 1687848994976808490L;
        static final Abort INSTANCE = new Abort();
        private Abort() {}
        public Throwable fillInStackTrace() {
            return this;
        }
    }

    // debugging

    private static final boolean DEBUG_EVENTS = false;
    private static final boolean DEBUG_BASEURI = false;

    //
    // Data
    //

    
DOM L3 error handler /** DOM L3 error handler */
    protected DOMErrorHandlerWrapper fErrorHandler = null;

    
True if inside DTD. /** True if inside DTD. */
    protected boolean fInDTD;

    // features

    
Create entity reference nodes. /** Create entity reference nodes. */
    protected boolean fCreateEntityRefNodes;

    
Include ignorable whitespace. /** Include ignorable whitespace. */
    protected boolean fIncludeIgnorableWhitespace;

    
Include Comments. /** Include Comments. */
    protected boolean fIncludeComments;

    
Create cdata nodes. /** Create cdata nodes. */
    protected boolean fCreateCDATANodes;

    // dom information

    
The document. /** The document. */
    protected Document fDocument;

    
The default Xerces document implementation, if used. /** The default Xerces document implementation, if used. */
    protected CoreDocumentImpl fDocumentImpl;

    
Whether to store PSVI information in DOM tree. /** Whether to store PSVI information in DOM tree. */
    protected boolean fStorePSVI;

    
The document class name to use. /** The document class name to use. */
    protected String  fDocumentClassName;

    
The document type node. /** The document type node. */
    protected DocumentType fDocumentType;

    
Current node. /** Current node. */
    protected Node fCurrentNode;
    protected CDATASection fCurrentCDATASection;
    protected EntityImpl fCurrentEntityDecl;
    protected int fDeferredEntityDecl;

    
Character buffer /** Character buffer */
    protected final StringBuilder fStringBuilder = new StringBuilder (50);

    // internal subset

    
Internal subset buffer. /** Internal subset buffer. */
    protected StringBuilder fInternalSubset;

    // deferred expansion data

    protected boolean              fDeferNodeExpansion;
    protected boolean              fNamespaceAware;
    protected DeferredDocumentImpl fDeferredDocumentImpl;
    protected int                  fDocumentIndex;
    protected int                  fDocumentTypeIndex;
    protected int                  fCurrentNodeIndex;
    protected int                  fCurrentCDATASectionIndex;

    // state

    
True if inside DTD external subset. /** True if inside DTD external subset. */
    protected boolean fInDTDExternalSubset;

    
Root element node. /** Root element node. */
    protected Node fRoot;

    
True if inside CDATA section. /** True if inside CDATA section. */
    protected boolean fInCDATASection;

    
True if saw the first chunk of characters/** True if saw the first chunk of characters*/
    protected boolean fFirstChunk = false;


    
LSParserFilter: specifies that element with given QNAME and all its children
must be rejected /** LSParserFilter: specifies that element with given QNAME and all its children
     * must be rejected */
    protected boolean fFilterReject = false;

    // data

    
Base uri stack/** Base uri stack*/
    protected final Stack<String> fBaseURIStack = new Stack<>();

    
LSParserFilter: tracks the element depth within a rejected subtree. /** LSParserFilter: tracks the element depth within a rejected subtree. */
    protected int fRejectedElementDepth = 0;

    
LSParserFilter: store depth of skipped elements /** LSParserFilter: store depth of skipped elements */
    protected Stack<Boolean> fSkippedElemStack = null;

    
LSParserFilter: true if inside entity reference /** LSParserFilter: true if inside entity reference */
    protected boolean fInEntityRef = false;

    
Attribute QName. /** Attribute QName. */
    private final QName fAttrQName = new QName();

    
Document locator. /** Document locator. */
    private XMLLocator fLocator;

    // handlers

    protected LSParserFilter fDOMFilter = null;

    //
    // Constructors
    //

    
Default constructor. /** Default constructor. */
    protected AbstractDOMParser (XMLParserConfiguration config) {

        super (config);


        // add recognized features
        fConfiguration.addRecognizedFeatures (RECOGNIZED_FEATURES);

        // set default values
        fConfiguration.setFeature (CREATE_ENTITY_REF_NODES, true);
        fConfiguration.setFeature (INCLUDE_IGNORABLE_WHITESPACE, true);
        fConfiguration.setFeature (DEFER_NODE_EXPANSION, true);
        fConfiguration.setFeature (INCLUDE_COMMENTS_FEATURE, true);
        fConfiguration.setFeature (CREATE_CDATA_NODES_FEATURE, true);

        // add recognized properties
        fConfiguration.addRecognizedProperties (RECOGNIZED_PROPERTIES);

        // set default values
        fConfiguration.setProperty (DOCUMENT_CLASS_NAME,
        DEFAULT_DOCUMENT_CLASS_NAME);

    } // <init>(XMLParserConfiguration)

    
This method retrieves the name of current document class.
/**
     * This method retrieves the name of current document class.
     */
    protected String getDocumentClassName () {
        return fDocumentClassName;
    }

    
This method allows the programmer to decide which document
factory to use when constructing the DOM tree. However, doing
so will lose the functionality of the default factory. Also,
a document class other than the default will lose the ability
to defer node expansion on the DOM tree produced.
Params:
documentClassName – The fully qualified class name of the
                     document factory to use when constructing
                     the DOM tree.
See Also:
getDocumentClassName
DEFAULT_DOCUMENT_CLASS_NAME/**
     * This method allows the programmer to decide which document
     * factory to use when constructing the DOM tree. However, doing
     * so will lose the functionality of the default factory. Also,
     * a document class other than the default will lose the ability
     * to defer node expansion on the DOM tree produced.
     *
     * @param documentClassName The fully qualified class name of the
     *                      document factory to use when constructing
     *                      the DOM tree.
     *
     * @see #getDocumentClassName
     * @see #DEFAULT_DOCUMENT_CLASS_NAME
     */
    protected void setDocumentClassName (String documentClassName) {

        // normalize class name
        if (documentClassName == null) {
            documentClassName = DEFAULT_DOCUMENT_CLASS_NAME;
        }

        if (!documentClassName.equals(DEFAULT_DOCUMENT_CLASS_NAME) &&
            !documentClassName.equals(PSVI_DOCUMENT_CLASS_NAME)) {
            // verify that this class exists and is of the right type
            try {
                Class<?> _class = ObjectFactory.findProviderClass (documentClassName, true);
                //if (!_class.isAssignableFrom(Document.class)) {
                if (!Document.class.isAssignableFrom (_class)) {
                    throw new IllegalArgumentException (
                        DOMMessageFormatter.formatMessage(
                        DOMMessageFormatter.DOM_DOMAIN,
                        "InvalidDocumentClassName", new Object [] {documentClassName}));
                }
            }
            catch (ClassNotFoundException e) {
                throw new IllegalArgumentException (
                    DOMMessageFormatter.formatMessage(
                    DOMMessageFormatter.DOM_DOMAIN,
                    "MissingDocumentClassName", new Object [] {documentClassName}));
            }
        }

        // set document class name
        fDocumentClassName = documentClassName;
        if (!documentClassName.equals (DEFAULT_DOCUMENT_CLASS_NAME)) {
            fDeferNodeExpansion = false;
        }

    } // setDocumentClassName(String)

    //
    // Public methods
    //

    
Returns the DOM document object. /** Returns the DOM document object. */
    public Document getDocument () {
        return fDocument;
    } // getDocument():Document

    
Drops all references to the last DOM which was built by this parser.
/**
     * Drops all references to the last DOM which was built by this parser.
     */
    public final void dropDocumentReferences() {
        fDocument = null;
        fDocumentImpl = null;
        fDeferredDocumentImpl = null;
        fDocumentType = null;
        fCurrentNode = null;
        fCurrentCDATASection = null;
        fCurrentEntityDecl = null;
        fRoot = null;
    } // dropDocumentReferences()

    //
    // XMLDocumentParser methods
    //

    
Resets the parser state.
Throws:
SAXException – Thrown on initialization error./**
     * Resets the parser state.
     *
     * @throws SAXException Thrown on initialization error.
     */
    public void reset () throws XNIException {
        super.reset ();


        // get feature state
        fCreateEntityRefNodes =
        fConfiguration.getFeature (CREATE_ENTITY_REF_NODES);

        fIncludeIgnorableWhitespace =
        fConfiguration.getFeature (INCLUDE_IGNORABLE_WHITESPACE);

        fDeferNodeExpansion =
        fConfiguration.getFeature (DEFER_NODE_EXPANSION);

        fNamespaceAware = fConfiguration.getFeature (NAMESPACES);

        fIncludeComments = fConfiguration.getFeature (INCLUDE_COMMENTS_FEATURE);

        fCreateCDATANodes = fConfiguration.getFeature (CREATE_CDATA_NODES_FEATURE);

        // get property
        setDocumentClassName ((String)
        fConfiguration.getProperty (DOCUMENT_CLASS_NAME));

        // reset dom information
        fDocument = null;
        fDocumentImpl = null;
        fStorePSVI = false;
        fDocumentType = null;
        fDocumentTypeIndex = -1;
        fDeferredDocumentImpl = null;
        fCurrentNode = null;

        // reset string buffer
        fStringBuilder.setLength (0);

        // reset state information
        fRoot = null;
        fInDTD = false;
        fInDTDExternalSubset = false;
        fInCDATASection = false;
        fFirstChunk = false;
        fCurrentCDATASection = null;
        fCurrentCDATASectionIndex = -1;

        fBaseURIStack.removeAllElements ();


    } // reset()

    
Set the locale to use for messages.
Params:
locale – The locale object to use for localization of messages./**
     * Set the locale to use for messages.
     *
     * @param locale The locale object to use for localization of messages.
     *
     */
    public void setLocale (Locale locale) {
        fConfiguration.setLocale (locale);

    } // setLocale(Locale)

    //
    // XMLDocumentHandler methods
    //

    
This method notifies the start of a general entity.

Note: This method is not called for entity references
appearing as part of attribute values.
Params:
name –     The name of the general entity.
identifier – The resource identifier.
encoding – The auto-detected IANA encoding name of the entity
                stream. This value will be null in those situations
                where the entity encoding is not auto-detected (e.g.
                internal entities or a document entity that is
                parsed from a java.io.Reader).
augs –     Additional information that may include infoset augmentations
Throws:
XNIException – Thrown by handler to signal an error./**
     * This method notifies the start of a general entity.
     * <p>
     * <strong>Note:</strong> This method is not called for entity references
     * appearing as part of attribute values.
     *
     * @param name     The name of the general entity.
     * @param identifier The resource identifier.
     * @param encoding The auto-detected IANA encoding name of the entity
     *                 stream. This value will be null in those situations
     *                 where the entity encoding is not auto-detected (e.g.
     *                 internal entities or a document entity that is
     *                 parsed from a java.io.Reader).
     * @param augs     Additional information that may include infoset augmentations
     *
     * @exception XNIException Thrown by handler to signal an error.
     */
    public void startGeneralEntity (String name,
    XMLResourceIdentifier identifier,
    String encoding, Augmentations augs)
    throws XNIException {
        if (DEBUG_EVENTS) {
            System.out.println ("==>startGeneralEntity ("+name+")");
            if (DEBUG_BASEURI) {
                System.out.println ("   expandedSystemId( **baseURI): "+identifier.getExpandedSystemId ());
                System.out.println ("   baseURI:"+ identifier.getBaseSystemId ());
            }
        }

        // Always create entity reference nodes to be able to recreate
        // entity as a part of doctype
        if (!fDeferNodeExpansion) {
            if (fFilterReject) {
                return;
            }
            setCharacterData (true);
            EntityReference er = fDocument.createEntityReference (name);
            if (fDocumentImpl != null) {
                // REVISIT: baseURI/actualEncoding
                //         remove dependency on our implementation when DOM L3 is REC
                //

                EntityReferenceImpl erImpl =(EntityReferenceImpl)er;

                // set base uri
                erImpl.setBaseURI (identifier.getExpandedSystemId ());
                if (fDocumentType != null) {
                    // set actual encoding
                    NamedNodeMap entities = fDocumentType.getEntities ();
                    fCurrentEntityDecl = (EntityImpl) entities.getNamedItem (name);
                    if (fCurrentEntityDecl != null) {
                        fCurrentEntityDecl.setInputEncoding (encoding);
                    }

                }
                // we don't need synchronization now, because entity ref will be
                // expanded anyway. Synch only needed when user creates entityRef node
                erImpl.needsSyncChildren (false);
            }
            fInEntityRef = true;
            fCurrentNode.appendChild (er);
            fCurrentNode = er;
        }
        else {

            int er =
            fDeferredDocumentImpl.createDeferredEntityReference (name, identifier.getExpandedSystemId ());
            if (fDocumentTypeIndex != -1) {
                // find corresponding Entity decl
                int node = fDeferredDocumentImpl.getLastChild (fDocumentTypeIndex, false);
                while (node != -1) {
                    short nodeType = fDeferredDocumentImpl.getNodeType (node, false);
                    if (nodeType == Node.ENTITY_NODE) {
                        String nodeName =
                        fDeferredDocumentImpl.getNodeName (node, false);
                        if (nodeName.equals (name)) {
                            fDeferredEntityDecl = node;
                            fDeferredDocumentImpl.setInputEncoding (node, encoding);
                            break;
                        }
                    }
                    node = fDeferredDocumentImpl.getRealPrevSibling (node, false);
                }
            }
            fDeferredDocumentImpl.appendChild (fCurrentNodeIndex, er);
            fCurrentNodeIndex = er;
        }

    } // startGeneralEntity(String,XMLResourceIdentifier, Augmentations)

    
Notifies of the presence of a TextDecl line in an entity. If present,
this method will be called immediately following the startEntity call.

Note: This method will never be called for the
document entity; it is only called for external general entities
referenced in document content.

Note: This method is not called for entity references
appearing as part of attribute values.
Params:
version –  The XML version, or null if not specified.
encoding – The IANA encoding name of the entity.
augs –       Additional information that may include infoset augmentations
Throws:
XNIException – Thrown by handler to signal an error./**
     * Notifies of the presence of a TextDecl line in an entity. If present,
     * this method will be called immediately following the startEntity call.
     * <p>
     * <strong>Note:</strong> This method will never be called for the
     * document entity; it is only called for external general entities
     * referenced in document content.
     * <p>
     * <strong>Note:</strong> This method is not called for entity references
     * appearing as part of attribute values.
     *
     * @param version  The XML version, or null if not specified.
     * @param encoding The IANA encoding name of the entity.
     * @param augs       Additional information that may include infoset augmentations
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void textDecl (String version, String encoding, Augmentations augs) throws XNIException {
        if (fInDTD){
            return;
        }
        if (!fDeferNodeExpansion) {
            if (fCurrentEntityDecl != null && !fFilterReject) {
                fCurrentEntityDecl.setXmlEncoding (encoding);
                if (version != null)
                    fCurrentEntityDecl.setXmlVersion (version);
            }
        }
        else {
            if (fDeferredEntityDecl !=-1) {
                fDeferredDocumentImpl.setEntityInfo (fDeferredEntityDecl, version, encoding);
            }
        }
    } // textDecl(String,String)

    
A comment.
Params:
text – The text in the comment.
augs –       Additional information that may include infoset augmentations
Throws:
XNIException – Thrown by application to signal an error./**
     * A comment.
     *
     * @param text The text in the comment.
     * @param augs       Additional information that may include infoset augmentations
     *
     * @throws XNIException Thrown by application to signal an error.
     */
    @SuppressWarnings("fallthrough") // by design at case LSParserFilter.FILTER_SKIP
    public void comment (XMLString text, Augmentations augs) throws XNIException {
        if (fInDTD) {
            if (fInternalSubset != null && !fInDTDExternalSubset) {
                fInternalSubset.append ("<!--");
                if (text.length > 0) {
                    fInternalSubset.append (text.ch, text.offset, text.length);
                }
                fInternalSubset.append ("-->");
            }
            return;
        }
        if (!fIncludeComments || fFilterReject) {
            return;
        }
        if (!fDeferNodeExpansion) {
            Comment comment = fDocument.createComment (text.toString ());

            setCharacterData (false);
            fCurrentNode.appendChild (comment);
            if (fDOMFilter !=null && !fInEntityRef &&
            (fDOMFilter.getWhatToShow () & NodeFilter.SHOW_COMMENT)!= 0) {
                short code = fDOMFilter.acceptNode (comment);
                switch (code) {
                    case LSParserFilter.FILTER_INTERRUPT:{
                        throw Abort.INSTANCE;
                    }
                    case LSParserFilter.FILTER_REJECT:{
                        // REVISIT: the constant FILTER_REJECT should be changed when new
                        // DOM LS specs gets published

                        // fall through to SKIP since comment has no children.
                    }
                    case LSParserFilter.FILTER_SKIP: {
                        // REVISIT: the constant FILTER_SKIP should be changed when new
                        // DOM LS specs gets published
                        fCurrentNode.removeChild (comment);
                        // make sure we don't loose chars if next event is characters()
                        fFirstChunk = true;
                        return;
                    }

                    default: {
                        // accept node
                    }
                }
            }

        }
        else {
            int comment =
            fDeferredDocumentImpl.createDeferredComment (text.toString ());
            fDeferredDocumentImpl.appendChild (fCurrentNodeIndex, comment);
        }

    } // comment(XMLString)

    
A processing instruction. Processing instructions consist of a
target name and, optionally, text data. The data is only meaningful
to the application.

Typically, a processing instruction's data will contain a series
of pseudo-attributes. These pseudo-attributes follow the form of
element attributes but are not parsed or presented
to the application as anything other than text. The application is
responsible for parsing the data.
Params:
target – The target.
data –   The data or null if none specified.
augs –       Additional information that may include infoset augmentations
Throws:
XNIException – Thrown by handler to signal an error./**
     * A processing instruction. Processing instructions consist of a
     * target name and, optionally, text data. The data is only meaningful
     * to the application.
     * <p>
     * Typically, a processing instruction's data will contain a series
     * of pseudo-attributes. These pseudo-attributes follow the form of
     * element attributes but are <strong>not</strong> parsed or presented
     * to the application as anything other than text. The application is
     * responsible for parsing the data.
     *
     * @param target The target.
     * @param data   The data or null if none specified.
     * @param augs       Additional information that may include infoset augmentations
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    @SuppressWarnings("fallthrough") // by design at case LSParserFilter.FILTER_REJECT
    public void processingInstruction (String target, XMLString data, Augmentations augs)
    throws XNIException {

        if (fInDTD) {
            if (fInternalSubset != null && !fInDTDExternalSubset) {
                fInternalSubset.append ("<?");
                fInternalSubset.append (target);
                if (data.length > 0) {
                    fInternalSubset.append (' ').append (data.ch, data.offset, data.length);
                }
                fInternalSubset.append ("?>");
            }
            return;
        }

        if (DEBUG_EVENTS) {
            System.out.println ("==>processingInstruction ("+target+")");
        }
        if (!fDeferNodeExpansion) {
            if (fFilterReject) {
                return;
            }
            ProcessingInstruction pi =
            fDocument.createProcessingInstruction (target, data.toString ());


            setCharacterData (false);
            fCurrentNode.appendChild (pi);
            if (fDOMFilter !=null && !fInEntityRef &&
            (fDOMFilter.getWhatToShow () & NodeFilter.SHOW_PROCESSING_INSTRUCTION)!= 0) {
                short code = fDOMFilter.acceptNode (pi);
                switch (code) {
                    case LSParserFilter.FILTER_INTERRUPT:{
                        throw Abort.INSTANCE;
                    }
                    case LSParserFilter.FILTER_REJECT:{
                        // fall through to SKIP since PI has no children.
                    }
                    case LSParserFilter.FILTER_SKIP: {
                        fCurrentNode.removeChild (pi);
                        // fFirstChunk must be set to true so that data
                        // won't be lost in the case where the child before PI is
                        // a text node and the next event is characters.
                        fFirstChunk = true;
                        return;
                    }
                    default: {
                    }
                }
            }
        }
        else {
            int pi = fDeferredDocumentImpl.
            createDeferredProcessingInstruction (target, data.toString ());
            fDeferredDocumentImpl.appendChild (fCurrentNodeIndex, pi);
        }

    } // processingInstruction(String,XMLString)

    
The start of the document.
Params:
locator – The system identifier of the entity if the entity
                is external, null otherwise.
encoding – The auto-detected IANA encoding name of the entity
                stream. This value will be null in those situations
                where the entity encoding is not auto-detected (e.g.
                internal entities or a document entity that is
                parsed from a java.io.Reader).
namespaceContext – 
                The namespace context in effect at the
                start of this document.
                This object represents the current context.
                Implementors of this class are responsible
                for copying the namespace bindings from the
                the current context (and its parent contexts)
                if that information is important.
augs –     Additional information that may include infoset augmentations
Throws:
XNIException – Thrown by handler to signal an error./**
     * The start of the document.
     *
     * @param locator The system identifier of the entity if the entity
     *                 is external, null otherwise.
     * @param encoding The auto-detected IANA encoding name of the entity
     *                 stream. This value will be null in those situations
     *                 where the entity encoding is not auto-detected (e.g.
     *                 internal entities or a document entity that is
     *                 parsed from a java.io.Reader).
     * @param namespaceContext
     *                 The namespace context in effect at the
     *                 start of this document.
     *                 This object represents the current context.
     *                 Implementors of this class are responsible
     *                 for copying the namespace bindings from the
     *                 the current context (and its parent contexts)
     *                 if that information is important.
     * @param augs     Additional information that may include infoset augmentations
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void startDocument (XMLLocator locator, String encoding,
    NamespaceContext namespaceContext, Augmentations augs)
    throws XNIException {

        fLocator = locator;
        if (!fDeferNodeExpansion) {
            if (fDocumentClassName.equals (DEFAULT_DOCUMENT_CLASS_NAME)) {
                fDocument = new DocumentImpl ();
                fDocumentImpl = (CoreDocumentImpl)fDocument;
                // REVISIT: when DOM Level 3 is REC rely on Document.support
                //          instead of specific class
                // set DOM error checking off
                fDocumentImpl.setStrictErrorChecking (false);
                // set actual encoding
                fDocumentImpl.setInputEncoding (encoding);
                // set documentURI
                fDocumentImpl.setDocumentURI (locator.getExpandedSystemId ());
            }
            else if (fDocumentClassName.equals (PSVI_DOCUMENT_CLASS_NAME)) {
                fDocument = new PSVIDocumentImpl();
                fDocumentImpl = (CoreDocumentImpl)fDocument;
                fStorePSVI = true;
                // REVISIT: when DOM Level 3 is REC rely on Document.support
                //          instead of specific class
                // set DOM error checking off
                fDocumentImpl.setStrictErrorChecking (false);
                // set actual encoding
                fDocumentImpl.setInputEncoding (encoding);
                // set documentURI
                fDocumentImpl.setDocumentURI (locator.getExpandedSystemId ());
            }
            else {
                // use specified document class
                try {
                    Class<?> documentClass = ObjectFactory.findProviderClass (fDocumentClassName, true);
                    fDocument = (Document)documentClass.getConstructor().newInstance();

                    // if subclass of our own class that's cool too
                    Class<?> defaultDocClass =
                    ObjectFactory.findProviderClass (CORE_DOCUMENT_CLASS_NAME, true);
                    if (defaultDocClass.isAssignableFrom (documentClass)) {
                        fDocumentImpl = (CoreDocumentImpl)fDocument;

                        Class<?> psviDocClass = ObjectFactory.findProviderClass (PSVI_DOCUMENT_CLASS_NAME, true);
                        if (psviDocClass.isAssignableFrom (documentClass)) {
                            fStorePSVI = true;
                        }

                        // REVISIT: when DOM Level 3 is REC rely on
                        //          Document.support instead of specific class
                        // set DOM error checking off
                        fDocumentImpl.setStrictErrorChecking (false);
                        // set actual encoding
                        fDocumentImpl.setInputEncoding (encoding);
                        // set documentURI
                        if (locator != null) {
                            fDocumentImpl.setDocumentURI (locator.getExpandedSystemId ());
                        }
                    }
                }
                catch (ClassNotFoundException e) {
                    // won't happen we already checked that earlier
                }
                catch (Exception e) {
                    throw new RuntimeException (
                        DOMMessageFormatter.formatMessage(
                        DOMMessageFormatter.DOM_DOMAIN,
                        "CannotCreateDocumentClass",
                        new Object [] {fDocumentClassName}));
                }
            }
            fCurrentNode = fDocument;
        }
        else {
            fDeferredDocumentImpl = new DeferredDocumentImpl (fNamespaceAware);
            fDocument = fDeferredDocumentImpl;
            fDocumentIndex = fDeferredDocumentImpl.createDeferredDocument ();
            // REVISIT: strict error checking is not implemented in deferred dom.
            //          Document.support instead of specific class

            // set actual encoding
            fDeferredDocumentImpl.setInputEncoding (encoding);
            // set documentURI
            fDeferredDocumentImpl.setDocumentURI (locator.getExpandedSystemId ());
            fCurrentNodeIndex = fDocumentIndex;

        }

    } // startDocument(String,String)

    
Notifies of the presence of an XMLDecl line in the document. If
present, this method will be called immediately following the
startDocument call.
Params:
version –    The XML version.
encoding –   The IANA encoding name of the document, or null if
                  not specified.
standalone – The standalone value, or null if not specified.
augs –       Additional information that may include infoset augmentations
Throws:
XNIException – Thrown by handler to signal an error./**
     * Notifies of the presence of an XMLDecl line in the document. If
     * present, this method will be called immediately following the
     * startDocument call.
     *
     * @param version    The XML version.
     * @param encoding   The IANA encoding name of the document, or null if
     *                   not specified.
     * @param standalone The standalone value, or null if not specified.
     * @param augs       Additional information that may include infoset augmentations
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void xmlDecl (String version, String encoding, String standalone,
    Augmentations augs)
    throws XNIException {
        if (!fDeferNodeExpansion) {
            // REVISIT: when DOM Level 3 is REC rely on Document.support
            //          instead of specific class
            if (fDocumentImpl != null) {
                if (version != null)
                    fDocumentImpl.setXmlVersion (version);
                fDocumentImpl.setXmlEncoding (encoding);
                fDocumentImpl.setXmlStandalone ("yes".equals (standalone));
            }
        }
        else {
            if (version != null)
                fDeferredDocumentImpl.setXmlVersion (version);
            fDeferredDocumentImpl.setXmlEncoding (encoding);
            fDeferredDocumentImpl.setXmlStandalone ("yes".equals (standalone));
        }
    } // xmlDecl(String,String,String)

    
Notifies of the presence of the DOCTYPE line in the document.
Params:
rootElement – The name of the root element.
publicId –    The public identifier if an external DTD or null
                   if the external DTD is specified using SYSTEM.
systemId –    The system identifier if an external DTD, null
                   otherwise.
augs –     Additional information that may include infoset augmentations
Throws:
XNIException – Thrown by handler to signal an error./**
     * Notifies of the presence of the DOCTYPE line in the document.
     *
     * @param rootElement The name of the root element.
     * @param publicId    The public identifier if an external DTD or null
     *                    if the external DTD is specified using SYSTEM.
     * @param systemId    The system identifier if an external DTD, null
     *                    otherwise.
     * @param augs     Additional information that may include infoset augmentations
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void doctypeDecl (String rootElement,
    String publicId, String systemId, Augmentations augs)
    throws XNIException {

        if (!fDeferNodeExpansion) {
            if (fDocumentImpl != null) {
                fDocumentType = fDocumentImpl.createDocumentType (
                rootElement, publicId, systemId);
                fCurrentNode.appendChild (fDocumentType);
            }
        }
        else {
            fDocumentTypeIndex = fDeferredDocumentImpl.
            createDeferredDocumentType (rootElement, publicId, systemId);
            fDeferredDocumentImpl.appendChild (fCurrentNodeIndex, fDocumentTypeIndex);
        }

    } // doctypeDecl(String,String,String)

    
The start of an element. If the document specifies the start element
by using an empty tag, then the startElement method will immediately
be followed by the endElement method, with no intervening methods.
Params:
element –    The name of the element.
attributes – The element attributes.
augs –     Additional information that may include infoset augmentations
Throws:
XNIException – Thrown by handler to signal an error./**
     * The start of an element. If the document specifies the start element
     * by using an empty tag, then the startElement method will immediately
     * be followed by the endElement method, with no intervening methods.
     *
     * @param element    The name of the element.
     * @param attributes The element attributes.
     * @param augs     Additional information that may include infoset augmentations
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void startElement (QName element, XMLAttributes attributes, Augmentations augs)
    throws XNIException {
        if (DEBUG_EVENTS) {
            System.out.println ("==>startElement ("+element.rawname+")");
        }
        if (!fDeferNodeExpansion) {
            if (fFilterReject) {
                ++fRejectedElementDepth;
                return;
            }
            Element el = createElementNode (element);
            int attrCount = attributes.getLength ();
            boolean seenSchemaDefault = false;
            for (int i = 0; i < attrCount; i++) {
                attributes.getName (i, fAttrQName);
                Attr attr = createAttrNode (fAttrQName);

                String attrValue = attributes.getValue (i);

                AttributePSVI attrPSVI =(AttributePSVI) attributes.getAugmentations (i).getItem (Constants.ATTRIBUTE_PSVI);
                if (fStorePSVI && attrPSVI != null){
                    ((PSVIAttrNSImpl) attr).setPSVI (attrPSVI);
                }

                attr.setValue (attrValue);
                boolean specified = attributes.isSpecified(i);
                // Take special care of schema defaulted attributes. Calling the
                // non-namespace aware setAttributeNode() method could overwrite
                // another attribute with the same local name.
                if (!specified && (seenSchemaDefault || (fAttrQName.uri != null &&
                    fAttrQName.uri != NamespaceContext.XMLNS_URI && fAttrQName.prefix == null))) {
                    el.setAttributeNodeNS(attr);
                    seenSchemaDefault = true;
                }
                else {
                    el.setAttributeNode(attr);
                }
                // NOTE: The specified value MUST be set after you set
                //       the node value because that turns the "specified"
                //       flag to "true" which may overwrite a "false"
                //       value from the attribute list. -Ac
                if (fDocumentImpl != null) {
                    AttrImpl attrImpl = (AttrImpl) attr;
                    Object type = null;
                    boolean id = false;

                    // REVISIT: currently it is possible that someone turns off
                    // namespaces and turns on xml schema validation
                    // To avoid classcast exception in AttrImpl check for namespaces
                    // however the correct solution should probably disallow setting
                    // namespaces to false when schema processing is turned on.
                    if (attrPSVI != null && fNamespaceAware) {
                        // XML Schema
                        type = attrPSVI.getMemberTypeDefinition ();
                        if (type == null) {
                            type = attrPSVI.getTypeDefinition ();
                            if (type != null) {
                                id = ((XSSimpleType) type).isIDType ();
                                attrImpl.setType (type);
                            }
                        }
                        else {
                            id = ((XSSimpleType) type).isIDType ();
                            attrImpl.setType (type);
                        }
                    }
                    else {
                        // DTD
                        boolean isDeclared = Boolean.TRUE.equals (attributes.getAugmentations (i).getItem (Constants.ATTRIBUTE_DECLARED));
                        // For DOM Level 3 TypeInfo, the type name must
                        // be null if this attribute has not been declared
                        // in the DTD.
                        if (isDeclared) {
                            type = attributes.getType (i);
                            id = "ID".equals (type);
                        }
                        attrImpl.setType (type);
                    }

                    if (id) {
                        ((ElementImpl) el).setIdAttributeNode (attr, true);
                    }

                    attrImpl.setSpecified (specified);
                    // REVISIT: Handle entities in attribute value.
                }
            }
            setCharacterData (false);

            if (augs != null) {
                ElementPSVI elementPSVI = (ElementPSVI)augs.getItem (Constants.ELEMENT_PSVI);
                if (elementPSVI != null && fNamespaceAware) {
                    XSTypeDefinition type = elementPSVI.getMemberTypeDefinition ();
                    if (type == null) {
                        type = elementPSVI.getTypeDefinition ();
                    }
                    ((ElementNSImpl)el).setType (type);
                }
            }


            // filter nodes
            if (fDOMFilter != null && !fInEntityRef) {
                if (fRoot == null) {
                    // fill value of the root element
                    fRoot = el;
                } else {
                    short code = fDOMFilter.startElement(el);
                    switch (code) {
                        case LSParserFilter.FILTER_INTERRUPT :
                            {
                                throw Abort.INSTANCE;
                            }
                        case LSParserFilter.FILTER_REJECT :
                            {
                                fFilterReject = true;
                                fRejectedElementDepth = 0;
                                return;
                            }
                        case LSParserFilter.FILTER_SKIP :
                            {
                                // make sure that if any char data is available
                                // the fFirstChunk is true, so that if the next event
                                // is characters(), and the last node is text, we will copy
                                // the value already in the text node to fStringBuffer
                                // (not to lose it).
                                fFirstChunk = true;
                                fSkippedElemStack.push(Boolean.TRUE);
                                return;
                            }
                        default :
                            {
                                if (!fSkippedElemStack.isEmpty()) {
                                    fSkippedElemStack.push(Boolean.FALSE);
                                }
                            }
                    }
                }
            }
            fCurrentNode.appendChild (el);
            fCurrentNode = el;
        }
        else {
            int el = fDeferredDocumentImpl.createDeferredElement (fNamespaceAware ?
                    element.uri : null, element.rawname);
            Object type = null;
            int attrCount = attributes.getLength ();
            // Need to loop in reverse order so that the attributes
            // are processed in document order when the DOM is expanded.
            for (int i = attrCount - 1; i >= 0; --i) {

                // set type information
                AttributePSVI attrPSVI = (AttributePSVI)attributes.getAugmentations (i).getItem (Constants.ATTRIBUTE_PSVI);
                boolean id = false;

                // REVISIT: currently it is possible that someone turns off
                // namespaces and turns on xml schema validation
                // To avoid classcast exception in AttrImpl check for namespaces
                // however the correct solution should probably disallow setting
                // namespaces to false when schema processing is turned on.
                if (attrPSVI != null && fNamespaceAware) {
                    // XML Schema
                    type = attrPSVI.getMemberTypeDefinition ();
                    if (type == null) {
                        type = attrPSVI.getTypeDefinition ();
                        if (type != null){
                            id = ((XSSimpleType) type).isIDType ();
                        }
                    }
                    else {
                        id = ((XSSimpleType) type).isIDType ();
                    }
                }
                else {
                    // DTD
                    boolean isDeclared = Boolean.TRUE.equals (attributes.getAugmentations (i).getItem (Constants.ATTRIBUTE_DECLARED));
                    // For DOM Level 3 TypeInfo, the type name must
                    // be null if this attribute has not been declared
                    // in the DTD.
                    if (isDeclared) {
                        type = attributes.getType (i);
                        id = "ID".equals (type);
                    }
                }

                // create attribute
                fDeferredDocumentImpl.setDeferredAttribute (
                el,
                attributes.getQName (i),
                attributes.getURI (i),
                attributes.getValue (i),
                attributes.isSpecified (i),
                id,
                type);
            }

            fDeferredDocumentImpl.appendChild (fCurrentNodeIndex, el);
            fCurrentNodeIndex = el;
        }
    } // startElement(QName,XMLAttributes)


    
An empty element.
Params:
element –    The name of the element.
attributes – The element attributes.
augs –   Additional information that may include infoset augmentations
Throws:
XNIException – Thrown by handler to signal an error./**
     * An empty element.
     *
     * @param element    The name of the element.
     * @param attributes The element attributes.
     * @param augs   Additional information that may include infoset augmentations
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void emptyElement (QName element, XMLAttributes attributes, Augmentations augs)
    throws XNIException {

        startElement (element, attributes, augs);
        endElement (element, augs);

    } // emptyElement(QName,XMLAttributes)

    
Character content.
Params:
text – The content.
augs –     Additional information that may include infoset augmentations
Throws:
XNIException – Thrown by handler to signal an error./**
     * Character content.
     *
     * @param text The content.
     * @param augs     Additional information that may include infoset augmentations
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void characters (XMLString text, Augmentations augs) throws XNIException {

        if (DEBUG_EVENTS) {
            System.out.println ("==>characters(): "+text.toString ());
        }

        if (!fDeferNodeExpansion) {

            if (fFilterReject) {
                return;
            }
            if (fInCDATASection && fCreateCDATANodes) {
                if (fCurrentCDATASection == null) {
                    fCurrentCDATASection =
                    fDocument.createCDATASection (text.toString ());
                    fCurrentNode.appendChild (fCurrentCDATASection);
                    fCurrentNode = fCurrentCDATASection;
                }
                else {
                    fCurrentCDATASection.appendData (text.toString ());
                }
            }
            else if (!fInDTD) {
                // if type is union (XML Schema) it is possible that we receive
                // character call with empty data
                if (text.length == 0) {
                    return;
                }

                Node child = fCurrentNode.getLastChild ();
                if (child != null && child.getNodeType () == Node.TEXT_NODE) {
                    // collect all the data into the string buffer.
                    if (fFirstChunk) {
                        if (fDocumentImpl != null) {
                            fStringBuilder.append (((TextImpl)child).removeData ());
                        } else {
                            fStringBuilder.append (((Text)child).getData ());
                            ((Text)child).setNodeValue (null);
                        }
                        fFirstChunk = false;
                    }
                    if (text.length > 0) {
                        fStringBuilder.append (text.ch, text.offset, text.length);
                    }
                }
                else {
                    fFirstChunk = true;
                    Text textNode = fDocument.createTextNode (text.toString());
                    fCurrentNode.appendChild (textNode);
                }

            }
        }
        else {
            // The Text and CDATASection normalization is taken care of within
            // the DOM in the deferred case.
            if (fInCDATASection && fCreateCDATANodes) {
                if (fCurrentCDATASectionIndex == -1) {
                    int cs = fDeferredDocumentImpl.
                    createDeferredCDATASection (text.toString ());

                    fDeferredDocumentImpl.appendChild (fCurrentNodeIndex, cs);
                    fCurrentCDATASectionIndex = cs;
                    fCurrentNodeIndex = cs;
                }
                else {
                    int txt = fDeferredDocumentImpl.
                    createDeferredTextNode (text.toString (), false);
                    fDeferredDocumentImpl.appendChild (fCurrentNodeIndex, txt);
                }
            } else if (!fInDTD) {
                // if type is union (XML Schema) it is possible that we receive
                // character call with empty data
                if (text.length == 0) {
                    return;
                }

                String value = text.toString ();
                int txt = fDeferredDocumentImpl.
                createDeferredTextNode (value, false);
                fDeferredDocumentImpl.appendChild (fCurrentNodeIndex, txt);

            }
        }
    } // characters(XMLString)

    
Ignorable whitespace. For this method to be called, the document
source must have some way of determining that the text containing
only whitespace characters should be considered ignorable. For
example, the validator can determine if a length of whitespace
characters in the document are ignorable based on the element
content model.
Params:
text – The ignorable whitespace.
augs –     Additional information that may include infoset augmentations
Throws:
XNIException – Thrown by handler to signal an error./**
     * Ignorable whitespace. For this method to be called, the document
     * source must have some way of determining that the text containing
     * only whitespace characters should be considered ignorable. For
     * example, the validator can determine if a length of whitespace
     * characters in the document are ignorable based on the element
     * content model.
     *
     * @param text The ignorable whitespace.
     * @param augs     Additional information that may include infoset augmentations
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void ignorableWhitespace (XMLString text, Augmentations augs) throws XNIException {

        if (!fIncludeIgnorableWhitespace || fFilterReject) {
            return;
        }
        if (!fDeferNodeExpansion) {
            Node child = fCurrentNode.getLastChild ();
            if (child != null && child.getNodeType () == Node.TEXT_NODE) {
                Text textNode = (Text)child;
                textNode.appendData (text.toString ());
            }
            else {
                Text textNode = fDocument.createTextNode (text.toString ());
                if (fDocumentImpl != null) {
                    TextImpl textNodeImpl = (TextImpl)textNode;
                    textNodeImpl.setIgnorableWhitespace (true);
                }
                fCurrentNode.appendChild (textNode);
            }
        }
        else {
            // The Text normalization is taken care of within the DOM in the
            // deferred case.
            int txt = fDeferredDocumentImpl.
            createDeferredTextNode (text.toString (), true);
            fDeferredDocumentImpl.appendChild (fCurrentNodeIndex, txt);
        }

    } // ignorableWhitespace(XMLString)

    
The end of an element.
Params:
element – The name of the element.
augs –     Additional information that may include infoset augmentations
Throws:
XNIException – Thrown by handler to signal an error./**
     * The end of an element.
     *
     * @param element The name of the element.
     * @param augs     Additional information that may include infoset augmentations
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void endElement (QName element, Augmentations augs) throws XNIException {
        if (DEBUG_EVENTS) {
            System.out.println ("==>endElement ("+element.rawname+")");
        }
        if (!fDeferNodeExpansion) {

            // REVISIT: Should this happen after we call the filter?
            if (augs != null && fDocumentImpl != null && (fNamespaceAware || fStorePSVI)) {
                ElementPSVI elementPSVI = (ElementPSVI) augs.getItem(Constants.ELEMENT_PSVI);
                if (elementPSVI != null) {
                    // Updating TypeInfo. If the declared type is a union the
                    // [member type definition] will only be available at the
                    // end of an element.
                    if (fNamespaceAware) {
                        XSTypeDefinition type = elementPSVI.getMemberTypeDefinition();
                        if (type == null) {
                            type = elementPSVI.getTypeDefinition();
                        }
                        ((ElementNSImpl)fCurrentNode).setType(type);
                    }
                    if (fStorePSVI) {
                        ((PSVIElementNSImpl)fCurrentNode).setPSVI (elementPSVI);
                    }
                }
            }

            if (fDOMFilter != null) {
                if (fFilterReject) {
                    if (fRejectedElementDepth-- == 0) {
                        fFilterReject = false;
                    }
                    return;
                }
                if (!fSkippedElemStack.isEmpty()) {
                    if (fSkippedElemStack.pop() == Boolean.TRUE) {
                        return;
                    }
                }
                setCharacterData (false);
                if ((fCurrentNode != fRoot) && !fInEntityRef && (fDOMFilter.getWhatToShow () & NodeFilter.SHOW_ELEMENT)!=0) {
                    short code = fDOMFilter.acceptNode (fCurrentNode);
                    switch (code) {
                        case LSParserFilter.FILTER_INTERRUPT:{
                            throw Abort.INSTANCE;
                        }
                        case LSParserFilter.FILTER_REJECT:{
                            Node parent = fCurrentNode.getParentNode ();
                            parent.removeChild (fCurrentNode);
                            fCurrentNode = parent;
                            return;
                        }
                        case LSParserFilter.FILTER_SKIP: {
                            // make sure that if any char data is available
                            // the fFirstChunk is true, so that if the next event
                            // is characters(), and the last node is text, we will copy
                            // the value already in the text node to fStringBuffer
                            // (not to lose it).
                            fFirstChunk = true;

                            // replace children
                            Node parent = fCurrentNode.getParentNode ();
                            NodeList ls = fCurrentNode.getChildNodes ();
                            int length = ls.getLength ();

                            for (int i=0;i<length;i++) {
                                parent.appendChild (ls.item (0));
                            }
                            parent.removeChild (fCurrentNode);
                            fCurrentNode = parent;

                            return;
                        }

                        default: { }
                    }
                }
                fCurrentNode = fCurrentNode.getParentNode ();

            } // end-if DOMFilter
            else {
                setCharacterData (false);
                fCurrentNode = fCurrentNode.getParentNode ();
            }

        }
        else {
            if (augs != null) {
                ElementPSVI elementPSVI = (ElementPSVI) augs.getItem(Constants.ELEMENT_PSVI);
                if (elementPSVI != null) {
                    // Setting TypeInfo. If the declared type is a union the
                    // [member type definition] will only be available at the
                    // end of an element.
                    XSTypeDefinition type = elementPSVI.getMemberTypeDefinition();
                    if (type == null) {
                        type = elementPSVI.getTypeDefinition();
                    }
                    fDeferredDocumentImpl.setTypeInfo(fCurrentNodeIndex, type);
                }
            }
            fCurrentNodeIndex =
                fDeferredDocumentImpl.getParentNode (fCurrentNodeIndex, false);
        }


    } // endElement(QName)


    
The start of a CDATA section.
Params:
augs –     Additional information that may include infoset augmentations
Throws:
XNIException – Thrown by handler to signal an error./**
     * The start of a CDATA section.
     * @param augs     Additional information that may include infoset augmentations
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void startCDATA (Augmentations augs) throws XNIException {

        fInCDATASection = true;
        if (!fDeferNodeExpansion) {
            if (fFilterReject) {
                return;
            }
            if (fCreateCDATANodes) {
                setCharacterData (false);
            }
        }
    } // startCDATA()

    
The end of a CDATA section.
Params:
augs –     Additional information that may include infoset augmentations
Throws:
XNIException – Thrown by handler to signal an error./**
     * The end of a CDATA section.
     * @param augs     Additional information that may include infoset augmentations
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    @SuppressWarnings("fallthrough") // by design at case LSParserFilter.FILTER_REJECT
    public void endCDATA (Augmentations augs) throws XNIException {

        fInCDATASection = false;
        if (!fDeferNodeExpansion) {

            if (fFilterReject) {
                return;
            }

            if (fCurrentCDATASection !=null) {

                if (fDOMFilter !=null && !fInEntityRef &&
                (fDOMFilter.getWhatToShow () & NodeFilter.SHOW_CDATA_SECTION)!= 0) {
                    short code = fDOMFilter.acceptNode (fCurrentCDATASection);
                    switch (code) {
                        case LSParserFilter.FILTER_INTERRUPT:{
                            throw Abort.INSTANCE;
                        }
                        case LSParserFilter.FILTER_REJECT:{
                            // fall through to SKIP since CDATA section has no children.
                        }
                        case LSParserFilter.FILTER_SKIP: {
                            Node parent = fCurrentNode.getParentNode ();
                            parent.removeChild (fCurrentCDATASection);
                            fCurrentNode = parent;
                            return;
                        }

                        default: {
                            // accept node
                        }
                    }
                }

                fCurrentNode = fCurrentNode.getParentNode ();
                fCurrentCDATASection = null;
            }
        }
        else {
            if (fCurrentCDATASectionIndex !=-1) {
                fCurrentNodeIndex =
                fDeferredDocumentImpl.getParentNode (fCurrentNodeIndex, false);
                fCurrentCDATASectionIndex = -1;
            }
        }

    } // endCDATA()

    
The end of the document.
Params:
augs –     Additional information that may include infoset augmentations
Throws:
XNIException – Thrown by handler to signal an error./**
     * The end of the document.
     * @param augs     Additional information that may include infoset augmentations
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void endDocument (Augmentations augs) throws XNIException {

        if (!fDeferNodeExpansion) {
            // REVISIT: when DOM Level 3 is REC rely on Document.support
            //          instead of specific class
            // set the actual encoding and set DOM error checking back on
            if (fDocumentImpl != null) {
                if (fLocator != null) {
                    if (fLocator.getEncoding() != null)
                        fDocumentImpl.setInputEncoding (fLocator.getEncoding());
                }
                fDocumentImpl.setStrictErrorChecking (true);
            }
            fCurrentNode = null;
        }
        else {
            // set the actual encoding
            if (fLocator != null) {
                if (fLocator.getEncoding() != null)
                    fDeferredDocumentImpl.setInputEncoding (fLocator.getEncoding());
            }
            fCurrentNodeIndex = -1;
        }

    } // endDocument()

    
This method notifies the end of a general entity.

Note: This method is not called for entity references
appearing as part of attribute values.
Params:
name –   The name of the entity.
augs –   Additional information that may include infoset augmentations
Throws:
XNIException – 
                  Thrown by handler to signal an error./**
     * This method notifies the end of a general entity.
     * <p>
     * <strong>Note:</strong> This method is not called for entity references
     * appearing as part of attribute values.
     *
     * @param name   The name of the entity.
     * @param augs   Additional information that may include infoset augmentations
     *
     * @exception XNIException
     *                   Thrown by handler to signal an error.
     */
    public void endGeneralEntity (String name, Augmentations augs) throws XNIException {
        if (DEBUG_EVENTS) {
            System.out.println ("==>endGeneralEntity: ("+name+")");
        }
        if (!fDeferNodeExpansion) {

            if (fFilterReject) {
                return;
            }
            setCharacterData (true);

            if (fDocumentType != null) {
                // get current entity declaration
                NamedNodeMap entities = fDocumentType.getEntities ();
                fCurrentEntityDecl = (EntityImpl) entities.getNamedItem (name);
                if (fCurrentEntityDecl != null) {
                    if (fCurrentEntityDecl != null && fCurrentEntityDecl.getFirstChild () == null) {
                        fCurrentEntityDecl.setReadOnly (false, true);
                        Node child = fCurrentNode.getFirstChild ();
                        while (child != null) {
                            Node copy = child.cloneNode (true);
                            fCurrentEntityDecl.appendChild (copy);
                            child = child.getNextSibling ();
                        }
                        fCurrentEntityDecl.setReadOnly (true, true);

                        //entities.setNamedItem(fCurrentEntityDecl);
                    }
                    fCurrentEntityDecl = null;
                }

            }
            fInEntityRef = false;
            boolean removeEntityRef = false;
            if (fCreateEntityRefNodes) {
                if (fDocumentImpl != null) {
                    // Make entity ref node read only
                    ((NodeImpl)fCurrentNode).setReadOnly (true, true);
                }

                if (fDOMFilter !=null &&
                (fDOMFilter.getWhatToShow () & NodeFilter.SHOW_ENTITY_REFERENCE)!= 0) {
                    short code = fDOMFilter.acceptNode (fCurrentNode);
                    switch (code) {
                        case LSParserFilter.FILTER_INTERRUPT:{
                            throw Abort.INSTANCE;
                        }
                        case LSParserFilter.FILTER_REJECT:{
                            Node parent = fCurrentNode.getParentNode ();
                            parent.removeChild (fCurrentNode);
                            fCurrentNode = parent;
                            return;

                        }
                        case LSParserFilter.FILTER_SKIP: {
                            // make sure we don't loose chars if next event is characters()
                            fFirstChunk = true;
                            removeEntityRef = true;
                            break;
                        }

                        default: {
                            fCurrentNode = fCurrentNode.getParentNode ();
                        }
                    }
                } else {
                    fCurrentNode = fCurrentNode.getParentNode ();
                }
            }

            if (!fCreateEntityRefNodes || removeEntityRef) {
                // move entity reference children to the list of
                // siblings of its parent and remove entity reference
                NodeList children = fCurrentNode.getChildNodes ();
                Node parent = fCurrentNode.getParentNode ();
                int length = children.getLength ();
                if (length > 0) {

                    // get previous sibling of the entity reference
                    Node node = fCurrentNode.getPreviousSibling ();
                    // normalize text nodes
                    Node child = children.item (0);
                    if (node != null && node.getNodeType () == Node.TEXT_NODE &&
                    child.getNodeType () == Node.TEXT_NODE) {
                        ((Text)node).appendData (child.getNodeValue ());
                        fCurrentNode.removeChild (child);

                    } else {
                        node = parent.insertBefore (child, fCurrentNode);
                        handleBaseURI (node);
                    }

                    for (int i=1;i <length;i++) {
                        node = parent.insertBefore (children.item (0), fCurrentNode);
                        handleBaseURI (node);
                    }
                } // length > 0
                parent.removeChild (fCurrentNode);
                fCurrentNode = parent;
            }
        }
        else {

            if (fDocumentTypeIndex != -1) {
                // find corresponding Entity decl
                int node = fDeferredDocumentImpl.getLastChild (fDocumentTypeIndex, false);
                while (node != -1) {
                    short nodeType = fDeferredDocumentImpl.getNodeType (node, false);
                    if (nodeType == Node.ENTITY_NODE) {
                        String nodeName =
                        fDeferredDocumentImpl.getNodeName (node, false);
                        if (nodeName.equals (name)) {
                            fDeferredEntityDecl = node;
                            break;
                        }
                    }
                    node = fDeferredDocumentImpl.getRealPrevSibling (node, false);
                }
            }

            if (fDeferredEntityDecl != -1 &&
            fDeferredDocumentImpl.getLastChild (fDeferredEntityDecl, false) == -1) {
                // entity definition exists and it does not have any children
                int prevIndex = -1;
                int childIndex = fDeferredDocumentImpl.getLastChild (fCurrentNodeIndex, false);
                while (childIndex != -1) {
                    int cloneIndex = fDeferredDocumentImpl.cloneNode (childIndex, true);
                    fDeferredDocumentImpl.insertBefore (fDeferredEntityDecl, cloneIndex, prevIndex);
                    prevIndex = cloneIndex;
                    childIndex = fDeferredDocumentImpl.getRealPrevSibling (childIndex, false);
                }
            }
            if (fCreateEntityRefNodes) {
                fCurrentNodeIndex =
                fDeferredDocumentImpl.getParentNode (fCurrentNodeIndex,
                false);
            } else { //!fCreateEntityRefNodes
                // move children of entity ref before the entity ref.
                // remove entity ref.

                // holds a child of entity ref
                int childIndex = fDeferredDocumentImpl.getLastChild (fCurrentNodeIndex, false);
                int parentIndex =
                fDeferredDocumentImpl.getParentNode (fCurrentNodeIndex,
                false);

                int prevIndex = fCurrentNodeIndex;
                int lastChild = childIndex;
                int sibling = -1;
                while (childIndex != -1) {
                    handleBaseURI (childIndex);
                    sibling = fDeferredDocumentImpl.getRealPrevSibling (childIndex, false);
                    fDeferredDocumentImpl.insertBefore (parentIndex, childIndex, prevIndex);
                    prevIndex = childIndex;
                    childIndex = sibling;
                }
                if(lastChild != -1)
                    fDeferredDocumentImpl.setAsLastChild (parentIndex, lastChild);
                else{
                    sibling = fDeferredDocumentImpl.getRealPrevSibling (prevIndex, false);
                    fDeferredDocumentImpl.setAsLastChild (parentIndex, sibling);
                }
                fCurrentNodeIndex = parentIndex;
            }
            fDeferredEntityDecl = -1;
        }


    } // endGeneralEntity(String, Augmentations)


    
Record baseURI information for the Element (by adding xml:base attribute)
or for the ProcessingInstruction (by setting a baseURI field)
Non deferred DOM.
Params:
node – /**
     * Record baseURI information for the Element (by adding xml:base attribute)
     * or for the ProcessingInstruction (by setting a baseURI field)
     * Non deferred DOM.
     *
     * @param node
     */
    protected final void handleBaseURI (Node node){
        if (fDocumentImpl != null) {
            // REVISIT: remove dependency on our implementation when
            //          DOM L3 becomes REC

            String baseURI = null;
            short nodeType = node.getNodeType ();

            if (nodeType == Node.ELEMENT_NODE) {
                // if an element already has xml:base attribute
                // do nothing
                if (fNamespaceAware) {
                    if (((Element)node).getAttributeNodeNS ("http://www.w3.org/XML/1998/namespace","base")!=null) {
                        return;
                    }
                } else if (((Element)node).getAttributeNode ("xml:base") != null) {
                    return;
                }
                // retrive the baseURI from the entity reference
                baseURI = ((EntityReferenceImpl)fCurrentNode).getBaseURI ();
                if (baseURI !=null && !baseURI.equals (fDocumentImpl.getDocumentURI ())) {
                    if (fNamespaceAware) {
                        ((Element)node).setAttributeNS ("http://www.w3.org/XML/1998/namespace", "xml:base", baseURI);
                    } else {
                        ((Element)node).setAttribute ("xml:base", baseURI);
                    }
                }
            }
            else if (nodeType == Node.PROCESSING_INSTRUCTION_NODE) {

                baseURI = ((EntityReferenceImpl)fCurrentNode).getBaseURI ();
                if (baseURI !=null && fErrorHandler != null) {
                    DOMErrorImpl error = new DOMErrorImpl ();
                    error.fType = "pi-base-uri-not-preserved";
                    error.fRelatedData = baseURI;
                    error.fSeverity = DOMError.SEVERITY_WARNING;
                    fErrorHandler.getErrorHandler ().handleError (error);
                }
            }
        }
    }

    
Record baseURI information for the Element (by adding xml:base attribute)
or for the ProcessingInstruction (by setting a baseURI field)
Deferred DOM.
Params:
node – /**
     *
     * Record baseURI information for the Element (by adding xml:base attribute)
     * or for the ProcessingInstruction (by setting a baseURI field)
     * Deferred DOM.
     *
     * @param node
     */
    protected final void handleBaseURI (int node){
        short nodeType = fDeferredDocumentImpl.getNodeType (node, false);

        if (nodeType == Node.ELEMENT_NODE) {
            String baseURI = fDeferredDocumentImpl.getNodeValueString (fCurrentNodeIndex, false);
            if (baseURI == null) {
                baseURI = fDeferredDocumentImpl.getDeferredEntityBaseURI (fDeferredEntityDecl);
            }
            if (baseURI !=null && !baseURI.equals (fDeferredDocumentImpl.getDocumentURI ())) {
                fDeferredDocumentImpl.setDeferredAttribute (node,
                "xml:base",
                "http://www.w3.org/XML/1998/namespace",
                baseURI,
                true,
                false,
                null);
            }
        }
        else if (nodeType == Node.PROCESSING_INSTRUCTION_NODE) {


            // retrieve baseURI from the entity reference
            String baseURI = fDeferredDocumentImpl.getNodeValueString (fCurrentNodeIndex, false);

            if (baseURI == null) {
                // try baseURI of the entity declaration
                baseURI = fDeferredDocumentImpl.getDeferredEntityBaseURI (fDeferredEntityDecl);
            }

            if (baseURI != null && fErrorHandler != null) {
                DOMErrorImpl error = new DOMErrorImpl ();
                error.fType = "pi-base-uri-not-preserved";
                error.fRelatedData = baseURI;
                error.fSeverity = DOMError.SEVERITY_WARNING;
                fErrorHandler.getErrorHandler ().handleError (error);
            }
        }
    }


    //
    // XMLDTDHandler methods
    //

    
The start of the DTD.
Params:
locator –  The document locator, or null if the document
                location cannot be reported during the parsing of
                the document DTD. However, it is strongly
                recommended that a locator be supplied that can
                at least report the base system identifier of the
                DTD.
augs – Additional information that may include infoset
                     augmentations.
Throws:
XNIException – Thrown by handler to signal an error./**
     * The start of the DTD.
     *
     * @param locator  The document locator, or null if the document
     *                 location cannot be reported during the parsing of
     *                 the document DTD. However, it is <em>strongly</em>
     *                 recommended that a locator be supplied that can
     *                 at least report the base system identifier of the
     *                 DTD.
     * @param augs Additional information that may include infoset
     *                      augmentations.
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void startDTD (XMLLocator locator, Augmentations augs) throws XNIException {
        if (DEBUG_EVENTS) {
            System.out.println ("==>startDTD");
            if (DEBUG_BASEURI) {
                System.out.println ("   expandedSystemId: "+locator.getExpandedSystemId ());
                System.out.println ("   baseURI:"+ locator.getBaseSystemId ());
            }
        }

        fInDTD = true;
        if (locator != null) {
            fBaseURIStack.push (locator.getBaseSystemId ());
        }
        if (fDeferNodeExpansion || fDocumentImpl != null) {
            fInternalSubset = new StringBuilder (1024);
        }
    } // startDTD(XMLLocator)


    
The end of the DTD.
Params:
augs – Additional information that may include infoset
                     augmentations.
Throws:
XNIException – Thrown by handler to signal an error./**
     * The end of the DTD.
     *
     * @param augs Additional information that may include infoset
     *                      augmentations.
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void endDTD (Augmentations augs) throws XNIException {
        if (DEBUG_EVENTS) {
            System.out.println ("==>endDTD()");
        }
        fInDTD = false;
        if (!fBaseURIStack.isEmpty ()) {
            fBaseURIStack.pop ();
        }
        String internalSubset = fInternalSubset != null && fInternalSubset.length () > 0
        ? fInternalSubset.toString () : null;
        if (fDeferNodeExpansion) {
            if (internalSubset != null) {
                fDeferredDocumentImpl.setInternalSubset (fDocumentTypeIndex, internalSubset);
            }
        }
        else if (fDocumentImpl != null) {
            if (internalSubset != null) {
                ((DocumentTypeImpl)fDocumentType).setInternalSubset (internalSubset);
            }
        }
    } // endDTD()

    
The start of a conditional section.
Params:
type – The type of the conditional section. This value will
            either be CONDITIONAL_INCLUDE or CONDITIONAL_IGNORE.
augs – Additional information that may include infoset
                     augmentations.
Throws:
XNIException – Thrown by handler to signal an error.
See Also:
XMLDTDHandler.CONDITIONAL_INCLUDE
XMLDTDHandler.CONDITIONAL_IGNORE/**
     * The start of a conditional section.
     *
     * @param type The type of the conditional section. This value will
     *             either be CONDITIONAL_INCLUDE or CONDITIONAL_IGNORE.
     * @param augs Additional information that may include infoset
     *                      augmentations.
     *
     * @throws XNIException Thrown by handler to signal an error.
     *
     * @see #CONDITIONAL_INCLUDE
     * @see #CONDITIONAL_IGNORE
     */
    public void startConditional (short type, Augmentations augs) throws XNIException  {
    } // startConditional(short)

    
The end of a conditional section.
Params:
augs – Additional information that may include infoset
                     augmentations.
Throws:
XNIException – Thrown by handler to signal an error./**
     * The end of a conditional section.
     *
     * @param augs Additional information that may include infoset
     *                      augmentations.
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void endConditional (Augmentations augs) throws XNIException {
    } // endConditional()


    
The start of the DTD external subset.
Params:
augs – Additional information that may include infoset
                     augmentations.
Throws:
XNIException – Thrown by handler to signal an error./**
     * The start of the DTD external subset.
     *
     * @param augs Additional information that may include infoset
     *                      augmentations.
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void startExternalSubset (XMLResourceIdentifier identifier,
    Augmentations augs) throws XNIException {
        if (DEBUG_EVENTS) {
            System.out.println ("==>startExternalSubset");
            if (DEBUG_BASEURI) {
                System.out.println ("   expandedSystemId: "+identifier.getExpandedSystemId ());
                System.out.println ("   baseURI:"+ identifier.getBaseSystemId ());
            }
        }
        fBaseURIStack.push (identifier.getBaseSystemId ());
        fInDTDExternalSubset = true;
    } // startExternalSubset(Augmentations)

    
The end of the DTD external subset.
Params:
augs – Additional information that may include infoset
                     augmentations.
Throws:
XNIException – Thrown by handler to signal an error./**
     * The end of the DTD external subset.
     *
     * @param augs Additional information that may include infoset
     *                      augmentations.
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void endExternalSubset (Augmentations augs) throws XNIException {
        fInDTDExternalSubset = false;
        fBaseURIStack.pop ();
    } // endExternalSubset(Augmentations)

    
An internal entity declaration.
Params:
name – The name of the entity. Parameter entity names start with
            '%', whereas the name of a general entity is just the
            entity name.
text – The value of the entity.
nonNormalizedText – The non-normalized value of the entity. This
            value contains the same sequence of characters that was in
            the internal entity declaration, without any entity
            references expanded.
augs – Additional information that may include infoset
                     augmentations.
Throws:
XNIException – Thrown by handler to signal an error./**
     * An internal entity declaration.
     *
     * @param name The name of the entity. Parameter entity names start with
     *             '%', whereas the name of a general entity is just the
     *             entity name.
     * @param text The value of the entity.
     * @param nonNormalizedText The non-normalized value of the entity. This
     *             value contains the same sequence of characters that was in
     *             the internal entity declaration, without any entity
     *             references expanded.
     * @param augs Additional information that may include infoset
     *                      augmentations.
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void internalEntityDecl (String name, XMLString text,
    XMLString nonNormalizedText,
    Augmentations augs) throws XNIException {

        if (DEBUG_EVENTS) {
            System.out.println ("==>internalEntityDecl: "+name);
            if (DEBUG_BASEURI) {
                System.out.println ("   baseURI:"+ fBaseURIStack.peek ());
            }
        }
        // internal subset string
        if (fInternalSubset != null && !fInDTDExternalSubset) {
            fInternalSubset.append ("<!ENTITY ");
            if (name.startsWith ("%")) {
                fInternalSubset.append ("% ");
                fInternalSubset.append (name.substring (1));
            }
            else {
                fInternalSubset.append (name);
            }
            fInternalSubset.append (' ');
            String value = nonNormalizedText.toString ();
            boolean singleQuote = value.indexOf ('\'') == -1;
            fInternalSubset.append (singleQuote ? '\'' : '"');
            fInternalSubset.append (value);
            fInternalSubset.append (singleQuote ? '\'' : '"');
            fInternalSubset.append (">\n");
        }

        // NOTE: We only know how to create these nodes for the Xerces
        //       DOM implementation because DOM Level 2 does not specify
        //       that functionality. -Ac

        // create full node
        // don't add parameter entities!
        if(name.startsWith ("%"))
            return;
        if (fDocumentType != null) {
            NamedNodeMap entities = fDocumentType.getEntities ();
            EntityImpl entity = (EntityImpl)entities.getNamedItem (name);
            if (entity == null) {
                entity = (EntityImpl)fDocumentImpl.createEntity (name);
                entity.setBaseURI (fBaseURIStack.peek ());
                entities.setNamedItem (entity);
            }
        }

        // create deferred node
        if (fDocumentTypeIndex != -1) {
            boolean found = false;
            int node = fDeferredDocumentImpl.getLastChild (fDocumentTypeIndex, false);
            while (node != -1) {
                short nodeType = fDeferredDocumentImpl.getNodeType (node, false);
                if (nodeType == Node.ENTITY_NODE) {
                    String nodeName = fDeferredDocumentImpl.getNodeName (node, false);
                    if (nodeName.equals (name)) {
                        found = true;
                        break;
                    }
                }
                node = fDeferredDocumentImpl.getRealPrevSibling (node, false);
            }
            if (!found) {
                int entityIndex =
                fDeferredDocumentImpl.createDeferredEntity (name, null, null, null, fBaseURIStack.peek ());
                fDeferredDocumentImpl.appendChild (fDocumentTypeIndex, entityIndex);
            }
        }

    } // internalEntityDecl(String,XMLString,XMLString)

    
An external entity declaration.
Params:
name –     The name of the entity. Parameter entity names start
                with '%', whereas the name of a general entity is just
                the entity name.
identifier –    An object containing all location information
                     pertinent to this notation.
augs – Additional information that may include infoset
                     augmentations.
Throws:
XNIException – Thrown by handler to signal an error./**
     * An external entity declaration.
     *
     * @param name     The name of the entity. Parameter entity names start
     *                 with '%', whereas the name of a general entity is just
     *                 the entity name.
     * @param identifier    An object containing all location information
     *                      pertinent to this notation.
     * @param augs Additional information that may include infoset
     *                      augmentations.
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void externalEntityDecl (String name, XMLResourceIdentifier identifier,
    Augmentations augs) throws XNIException {


        if (DEBUG_EVENTS) {
            System.out.println ("==>externalEntityDecl: "+name);
            if (DEBUG_BASEURI) {
                System.out.println ("   expandedSystemId:"+ identifier.getExpandedSystemId ());
                System.out.println ("   baseURI:"+ identifier.getBaseSystemId ());
            }
        }
        // internal subset string
        String publicId = identifier.getPublicId ();
        String literalSystemId = identifier.getLiteralSystemId ();
        if (fInternalSubset != null && !fInDTDExternalSubset) {
            fInternalSubset.append ("<!ENTITY ");
            if (name.startsWith ("%")) {
                fInternalSubset.append ("% ");
                fInternalSubset.append (name.substring (1));
            }
            else {
                fInternalSubset.append (name);
            }
            fInternalSubset.append (' ');
            if (publicId != null) {
                fInternalSubset.append ("PUBLIC '");
                fInternalSubset.append (publicId);
                fInternalSubset.append ("' '");
            }
            else {
                fInternalSubset.append ("SYSTEM '");
            }
            fInternalSubset.append (literalSystemId);
            fInternalSubset.append ("'>\n");
        }

        // NOTE: We only know how to create these nodes for the Xerces
        //       DOM implementation because DOM Level 2 does not specify
        //       that functionality. -Ac

        // create full node
        // don't add parameter entities!
        if(name.startsWith ("%"))
            return;
        if (fDocumentType != null) {
            NamedNodeMap entities = fDocumentType.getEntities ();
            EntityImpl entity = (EntityImpl)entities.getNamedItem (name);
            if (entity == null) {
                entity = (EntityImpl)fDocumentImpl.createEntity (name);
                entity.setPublicId (publicId);
                entity.setSystemId (literalSystemId);
                entity.setBaseURI (identifier.getBaseSystemId ());
                entities.setNamedItem (entity);
            }
        }

        // create deferred node
        if (fDocumentTypeIndex != -1) {
            boolean found = false;
            int nodeIndex = fDeferredDocumentImpl.getLastChild (fDocumentTypeIndex, false);
            while (nodeIndex != -1) {
                short nodeType = fDeferredDocumentImpl.getNodeType (nodeIndex, false);
                if (nodeType == Node.ENTITY_NODE) {
                    String nodeName = fDeferredDocumentImpl.getNodeName (nodeIndex, false);
                    if (nodeName.equals (name)) {
                        found = true;
                        break;
                    }
                }
                nodeIndex = fDeferredDocumentImpl.getRealPrevSibling (nodeIndex, false);
            }
            if (!found) {
                int entityIndex = fDeferredDocumentImpl.createDeferredEntity (
                name, publicId, literalSystemId, null, identifier.getBaseSystemId ());
                fDeferredDocumentImpl.appendChild (fDocumentTypeIndex, entityIndex);
            }
        }

    } // externalEntityDecl(String,XMLResourceIdentifier, Augmentations)


    
This method notifies of the start of a parameter entity. The parameter
entity name start with a '%' character.
Params:
name –     The name of the parameter entity.
identifier – The resource identifier.
encoding – The auto-detected IANA encoding name of the entity
                stream. This value will be null in those situations
                where the entity encoding is not auto-detected (e.g.
                internal parameter entities).
augs – Additional information that may include infoset
                     augmentations.
Throws:
XNIException – Thrown by handler to signal an error./**
     * This method notifies of the start of a parameter entity. The parameter
     * entity name start with a '%' character.
     *
     * @param name     The name of the parameter entity.
     * @param identifier The resource identifier.
     * @param encoding The auto-detected IANA encoding name of the entity
     *                 stream. This value will be null in those situations
     *                 where the entity encoding is not auto-detected (e.g.
     *                 internal parameter entities).
     * @param augs Additional information that may include infoset
     *                      augmentations.
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void startParameterEntity (String name,
    XMLResourceIdentifier identifier,
    String encoding,
    Augmentations augs) throws XNIException {
        if (DEBUG_EVENTS) {
            System.out.println ("==>startParameterEntity: "+name);
            if (DEBUG_BASEURI) {
                System.out.println ("   expandedSystemId: "+identifier.getExpandedSystemId ());
                System.out.println ("   baseURI:"+ identifier.getBaseSystemId ());
            }
        }
        if (augs != null && fInternalSubset != null &&
            !fInDTDExternalSubset &&
            Boolean.TRUE.equals(augs.getItem(Constants.ENTITY_SKIPPED))) {
            fInternalSubset.append(name).append(";\n");
        }
        fBaseURIStack.push (identifier.getExpandedSystemId ());
    }


    
This method notifies the end of a parameter entity. Parameter entity
names begin with a '%' character.
Params:
name – The name of the parameter entity.
augs – Additional information that may include infoset
                     augmentations.
Throws:
XNIException – Thrown by handler to signal an error./**
     * This method notifies the end of a parameter entity. Parameter entity
     * names begin with a '%' character.
     *
     * @param name The name of the parameter entity.
     * @param augs Additional information that may include infoset
     *                      augmentations.
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void endParameterEntity (String name, Augmentations augs) throws XNIException {

        if (DEBUG_EVENTS) {
            System.out.println ("==>endParameterEntity: "+name);
        }
        fBaseURIStack.pop ();
    }

    
An unparsed entity declaration.
Params:
name –     The name of the entity.
identifier –    An object containing all location information
                     pertinent to this entity.
notation – The name of the notation.
augs – Additional information that may include infoset
                     augmentations.
Throws:
XNIException – Thrown by handler to signal an error./**
     * An unparsed entity declaration.
     *
     * @param name     The name of the entity.
     * @param identifier    An object containing all location information
     *                      pertinent to this entity.
     * @param notation The name of the notation.
     * @param augs Additional information that may include infoset
     *                      augmentations.
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void unparsedEntityDecl (String name, XMLResourceIdentifier identifier,
    String notation, Augmentations augs)
    throws XNIException {

        if (DEBUG_EVENTS) {
            System.out.println ("==>unparsedEntityDecl: "+name);
            if (DEBUG_BASEURI) {
                System.out.println ("   expandedSystemId:"+ identifier.getExpandedSystemId ());
                System.out.println ("   baseURI:"+ identifier.getBaseSystemId ());
            }
        }
        // internal subset string
        String publicId = identifier.getPublicId ();
        String literalSystemId = identifier.getLiteralSystemId ();
        if (fInternalSubset != null && !fInDTDExternalSubset) {
            fInternalSubset.append ("<!ENTITY ");
            fInternalSubset.append (name);
            fInternalSubset.append (' ');
            if (publicId != null) {
                fInternalSubset.append ("PUBLIC '");
                fInternalSubset.append (publicId);
                if (literalSystemId != null) {
                    fInternalSubset.append ("' '");
                    fInternalSubset.append (literalSystemId);
                }
            }
            else {
                fInternalSubset.append ("SYSTEM '");
                fInternalSubset.append (literalSystemId);
            }
            fInternalSubset.append ("' NDATA ");
            fInternalSubset.append (notation);
            fInternalSubset.append (">\n");
        }

        // NOTE: We only know how to create these nodes for the Xerces
        //       DOM implementation because DOM Level 2 does not specify
        //       that functionality. -Ac

        // create full node
        if (fDocumentType != null) {
            NamedNodeMap entities = fDocumentType.getEntities ();
            EntityImpl entity = (EntityImpl)entities.getNamedItem (name);
            if (entity == null) {
                entity = (EntityImpl)fDocumentImpl.createEntity (name);
                entity.setPublicId (publicId);
                entity.setSystemId (literalSystemId);
                entity.setNotationName (notation);
                entity.setBaseURI (identifier.getBaseSystemId ());
                entities.setNamedItem (entity);
            }
        }

        // create deferred node
        if (fDocumentTypeIndex != -1) {
            boolean found = false;
            int nodeIndex = fDeferredDocumentImpl.getLastChild (fDocumentTypeIndex, false);
            while (nodeIndex != -1) {
                short nodeType = fDeferredDocumentImpl.getNodeType (nodeIndex, false);
                if (nodeType == Node.ENTITY_NODE) {
                    String nodeName = fDeferredDocumentImpl.getNodeName (nodeIndex, false);
                    if (nodeName.equals (name)) {
                        found = true;
                        break;
                    }
                }
                nodeIndex = fDeferredDocumentImpl.getRealPrevSibling (nodeIndex, false);
            }
            if (!found) {
                int entityIndex = fDeferredDocumentImpl.createDeferredEntity (
                name, publicId, literalSystemId, notation, identifier.getBaseSystemId ());
                fDeferredDocumentImpl.appendChild (fDocumentTypeIndex, entityIndex);
            }
        }

    } // unparsedEntityDecl(String,XMLResourceIdentifier, String, Augmentations)

    
A notation declaration
Params:
name –     The name of the notation.
identifier –    An object containing all location information
                     pertinent to this notation.
augs – Additional information that may include infoset
                     augmentations.
Throws:
XNIException – Thrown by handler to signal an error./**
     * A notation declaration
     *
     * @param name     The name of the notation.
     * @param identifier    An object containing all location information
     *                      pertinent to this notation.
     * @param augs Additional information that may include infoset
     *                      augmentations.
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void notationDecl (String name, XMLResourceIdentifier identifier,
    Augmentations augs) throws XNIException {

        // internal subset string
        String publicId = identifier.getPublicId ();
        String literalSystemId = identifier.getLiteralSystemId ();
        if (fInternalSubset != null && !fInDTDExternalSubset) {
            fInternalSubset.append ("<!NOTATION ");
            fInternalSubset.append (name);
            if (publicId != null) {
                fInternalSubset.append (" PUBLIC '");
                fInternalSubset.append (publicId);
                if (literalSystemId != null) {
                    fInternalSubset.append ("' '");
                    fInternalSubset.append (literalSystemId);
                }
            }
            else {
                fInternalSubset.append (" SYSTEM '");
                fInternalSubset.append (literalSystemId);
            }
            fInternalSubset.append ("'>\n");
        }

        // NOTE: We only know how to create these nodes for the Xerces
        //       DOM implementation because DOM Level 2 does not specify
        //       that functionality. -Ac

        // create full node
        if (fDocumentImpl !=null && fDocumentType != null) {
            NamedNodeMap notations = fDocumentType.getNotations ();
            if (notations.getNamedItem (name) == null) {
                NotationImpl notation = (NotationImpl)fDocumentImpl.createNotation (name);
                notation.setPublicId (publicId);
                notation.setSystemId (literalSystemId);
                notation.setBaseURI (identifier.getBaseSystemId ());
                notations.setNamedItem (notation);
            }
        }

        // create deferred node
        if (fDocumentTypeIndex != -1) {
            boolean found = false;
            int nodeIndex = fDeferredDocumentImpl.getLastChild (fDocumentTypeIndex, false);
            while (nodeIndex != -1) {
                short nodeType = fDeferredDocumentImpl.getNodeType (nodeIndex, false);
                if (nodeType == Node.NOTATION_NODE) {
                    String nodeName = fDeferredDocumentImpl.getNodeName (nodeIndex, false);
                    if (nodeName.equals (name)) {
                        found = true;
                        break;
                    }
                }
                nodeIndex = fDeferredDocumentImpl.getPrevSibling (nodeIndex, false);
            }
            if (!found) {
                int notationIndex = fDeferredDocumentImpl.createDeferredNotation (
                name, publicId, literalSystemId, identifier.getBaseSystemId ());
                fDeferredDocumentImpl.appendChild (fDocumentTypeIndex, notationIndex);
            }
        }

    } // notationDecl(String,XMLResourceIdentifier, Augmentations)

    
Characters within an IGNORE conditional section.
Params:
text – The ignored text.
augs – Additional information that may include infoset
                     augmentations.
Throws:
XNIException – Thrown by handler to signal an error./**
     * Characters within an IGNORE conditional section.
     *
     * @param text The ignored text.
     * @param augs Additional information that may include infoset
     *                      augmentations.
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void ignoredCharacters (XMLString text, Augmentations augs) throws XNIException {
    } // ignoredCharacters(XMLString, Augmentations)


    
An element declaration.
Params:
name –         The name of the element.
contentModel – The element content model.
augs – Additional information that may include infoset
                     augmentations.
Throws:
XNIException – Thrown by handler to signal an error./**
     * An element declaration.
     *
     * @param name         The name of the element.
     * @param contentModel The element content model.
     * @param augs Additional information that may include infoset
     *                      augmentations.
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void elementDecl (String name, String contentModel, Augmentations augs)
    throws XNIException {

        // internal subset string
        if (fInternalSubset != null && !fInDTDExternalSubset) {
            fInternalSubset.append ("<!ELEMENT ");
            fInternalSubset.append (name);
            fInternalSubset.append (' ');
            fInternalSubset.append (contentModel);
            fInternalSubset.append (">\n");
        }

    } // elementDecl(String,String)

    
An attribute declaration.
Params:
elementName –   The name of the element that this attribute
                     is associated with.
attributeName – The name of the attribute.
type –          The attribute type. This value will be one of
                     the following: "CDATA", "ENTITY", "ENTITIES",
                     "ENUMERATION", "ID", "IDREF", "IDREFS",
                     "NMTOKEN", "NMTOKENS", or "NOTATION".
enumeration –   If the type has the value "ENUMERATION" or
                     "NOTATION", this array holds the allowed attribute
                     values; otherwise, this array is null.
defaultType –   The attribute default type. This value will be
                     one of the following: "#FIXED", "#IMPLIED",
                     "#REQUIRED", or null.
defaultValue –  The attribute default value, or null if no
                     default value is specified.
nonNormalizedDefaultValue –  The attribute default value with no normalization
                     performed, or null if no default value is specified.
augs – Additional information that may include infoset
                     augmentations.
Throws:
XNIException – Thrown by handler to signal an error./**
     * An attribute declaration.
     *
     * @param elementName   The name of the element that this attribute
     *                      is associated with.
     * @param attributeName The name of the attribute.
     * @param type          The attribute type. This value will be one of
     *                      the following: "CDATA", "ENTITY", "ENTITIES",
     *                      "ENUMERATION", "ID", "IDREF", "IDREFS",
     *                      "NMTOKEN", "NMTOKENS", or "NOTATION".
     * @param enumeration   If the type has the value "ENUMERATION" or
     *                      "NOTATION", this array holds the allowed attribute
     *                      values; otherwise, this array is null.
     * @param defaultType   The attribute default type. This value will be
     *                      one of the following: "#FIXED", "#IMPLIED",
     *                      "#REQUIRED", or null.
     * @param defaultValue  The attribute default value, or null if no
     *                      default value is specified.
     * @param nonNormalizedDefaultValue  The attribute default value with no normalization
     *                      performed, or null if no default value is specified.
     * @param augs Additional information that may include infoset
     *                      augmentations.
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void attributeDecl (String elementName, String attributeName,
    String type, String[] enumeration,
    String defaultType, XMLString defaultValue,
    XMLString nonNormalizedDefaultValue, Augmentations augs) throws XNIException {

        // internal subset string
        if (fInternalSubset != null && !fInDTDExternalSubset) {
            fInternalSubset.append ("<!ATTLIST ");
            fInternalSubset.append (elementName);
            fInternalSubset.append (' ');
            fInternalSubset.append (attributeName);
            fInternalSubset.append (' ');
            if (type.equals ("ENUMERATION")) {
                fInternalSubset.append ('(');
                for (int i = 0; i < enumeration.length; i++) {
                    if (i > 0) {
                        fInternalSubset.append ('|');
                    }
                    fInternalSubset.append (enumeration[i]);
                }
                fInternalSubset.append (')');
            }
            else {
                fInternalSubset.append (type);
            }
            if (defaultType != null) {
                fInternalSubset.append (' ');
                fInternalSubset.append (defaultType);
            }
            if (defaultValue != null) {
                fInternalSubset.append (" '");
                for (int i = 0; i < defaultValue.length; i++) {
                    char c = defaultValue.ch[defaultValue.offset + i];
                    if (c == '\'') {
                        fInternalSubset.append ("&apos;");
                    }
                    else {
                        fInternalSubset.append (c);
                    }
                }
                fInternalSubset.append ('\'');
            }
            fInternalSubset.append (">\n");
        }
        // REVISIT: This code applies to the support of domx/grammar-access
        // feature in Xerces 1

        // deferred expansion
        if (fDeferredDocumentImpl != null) {

            // get the default value
            if (defaultValue != null) {

                // get element definition
                int elementDefIndex  = fDeferredDocumentImpl.lookupElementDefinition (elementName);

                // create element definition if not already there
                if (elementDefIndex == -1) {
                    elementDefIndex = fDeferredDocumentImpl.createDeferredElementDefinition (elementName);
                    fDeferredDocumentImpl.appendChild (fDocumentTypeIndex, elementDefIndex);
                }
                // add default attribute
                boolean nsEnabled = fNamespaceAware;
                String namespaceURI = null;
                if (nsEnabled) {
                    // DOM Level 2 wants all namespace declaration attributes
                    // to be bound to "http://www.w3.org/2000/xmlns/"
                    // So as long as the XML parser doesn't do it, it needs to
                    // done here.
                    if (attributeName.startsWith("xmlns:") ||
                        attributeName.equals("xmlns")) {
                        namespaceURI = NamespaceContext.XMLNS_URI;
                    }
                    else if (attributeName.startsWith("xml:")) {
                        namespaceURI = NamespaceContext.XML_URI;
                    }
                }
                int attrIndex = fDeferredDocumentImpl.createDeferredAttribute (
                        attributeName, namespaceURI, defaultValue.toString(), false);
                if ("ID".equals (type)) {
                    fDeferredDocumentImpl.setIdAttribute (attrIndex);
                }
                // REVISIT: set ID type correctly
                fDeferredDocumentImpl.appendChild (elementDefIndex, attrIndex);
            }

        } // if deferred

        // full expansion
        else if (fDocumentImpl != null) {

            // get the default value
            if (defaultValue != null) {

                // get element definition node
                NamedNodeMap elements = ((DocumentTypeImpl)fDocumentType).getElements ();
                ElementDefinitionImpl elementDef = (ElementDefinitionImpl)elements.getNamedItem (elementName);
                if (elementDef == null) {
                    elementDef = fDocumentImpl.createElementDefinition (elementName);
                    ((DocumentTypeImpl)fDocumentType).getElements ().setNamedItem (elementDef);
                }

                // REVISIT: Check for uniqueness of element name? -Ac

                // create attribute and set properties
                boolean nsEnabled = fNamespaceAware;
                AttrImpl attr;
                if (nsEnabled) {
                    String namespaceURI = null;
                    // DOM Level 2 wants all namespace declaration attributes
                    // to be bound to "http://www.w3.org/2000/xmlns/"
                    // So as long as the XML parser doesn't do it, it needs to
                    // done here.
                    if (attributeName.startsWith("xmlns:") ||
                        attributeName.equals("xmlns")) {
                        namespaceURI = NamespaceContext.XMLNS_URI;
                    }
                    else if (attributeName.startsWith("xml:")) {
                        namespaceURI = NamespaceContext.XML_URI;
                    }
                    attr = (AttrImpl)fDocumentImpl.createAttributeNS (namespaceURI,
                    attributeName);
                }
                else {
                    attr = (AttrImpl)fDocumentImpl.createAttribute (attributeName);
                }
                attr.setValue (defaultValue.toString ());
                attr.setSpecified (false);
                attr.setIdAttribute ("ID".equals (type));

                // add default attribute to element definition
                if (nsEnabled){
                    elementDef.getAttributes ().setNamedItemNS (attr);
                }
                else {
                    elementDef.getAttributes ().setNamedItem (attr);
                }
            }

        } // if NOT defer-node-expansion

    } // attributeDecl(String,String,String,String[],String,XMLString, XMLString, Augmentations)


    
The start of an attribute list.
Params:
elementName – The name of the element that this attribute
                   list is associated with.
augs – Additional information that may include infoset
                     augmentations.
Throws:
XNIException – Thrown by handler to signal an error./**
     * The start of an attribute list.
     *
     * @param elementName The name of the element that this attribute
     *                    list is associated with.
     * @param augs Additional information that may include infoset
     *                      augmentations.
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void startAttlist (String elementName, Augmentations augs) throws XNIException {
    } // startAttlist(String)


    
The end of an attribute list.
Params:
augs – Additional information that may include infoset
                     augmentations.
Throws:
XNIException – Thrown by handler to signal an error./**
     * The end of an attribute list.
     *
     * @param augs Additional information that may include infoset
     *                      augmentations.
     *
     * @throws XNIException Thrown by handler to signal an error.
     */
    public void endAttlist (Augmentations augs) throws XNIException {
    } // endAttlist()


    // method to create an element node.
    // subclasses can override this method to create element nodes in other ways.
    protected Element createElementNode (QName element) {
        Element el = null;

        if (fNamespaceAware) {
            // if we are using xerces DOM implementation, call our
            // own constructor to reuse the strings we have here.
            if (fDocumentImpl != null) {
                el = fDocumentImpl.createElementNS (element.uri, element.rawname,
                element.localpart);
            }
            else {
                el = fDocument.createElementNS (element.uri, element.rawname);
            }
        }
        else {
            el = fDocument.createElement (element.rawname);
        }

        return el;
    }

    // method to create an attribute node.
    // subclasses can override this method to create attribute nodes in other ways.
    protected Attr createAttrNode (QName attrQName) {
        Attr attr = null;

        if (fNamespaceAware) {
            if (fDocumentImpl != null) {
                // if we are using xerces DOM implementation, call our
                // own constructor to reuse the strings we have here.
                attr = fDocumentImpl.createAttributeNS (attrQName.uri,
                attrQName.rawname,
                attrQName.localpart);
            }
            else {
                attr = fDocument.createAttributeNS (attrQName.uri,
                attrQName.rawname);
            }
        }
        else {
            attr = fDocument.createAttribute (attrQName.rawname);
        }

        return attr;
    }

    /*
     * When the first characters() call is received, the data is stored in
     * a new Text node. If right after the first characters() we receive another chunk of data,
     * the data from the Text node, following the new characters are appended
     * to the fStringBuffer and the text node data is set to empty.
     *
     * This function is called when the state is changed and the
     * data must be appended to the current node.
     *
     * Note: if DOMFilter is set, you must make sure that if Node is skipped,
     * or removed fFistChunk must be set to true, otherwise some data can be lost.
     *
     */
    @SuppressWarnings("fallthrough") // by design at case LSParserFilter.FILTER_REJECT
    protected void  setCharacterData (boolean sawChars){

        // handle character data
        fFirstChunk = sawChars;


        // if we have data in the buffer we must have created
        // a text node already.

        Node child = fCurrentNode.getLastChild ();
        if (child != null) {
            if (fStringBuilder.length () > 0) {
                // REVISIT: should this check be performed?
                if (child.getNodeType () == Node.TEXT_NODE) {
                    if (fDocumentImpl != null) {
                        ((TextImpl)child).replaceData (fStringBuilder.toString ());
                    }
                    else {
                        ((Text)child).setData (fStringBuilder.toString ());
                    }
                }
                // reset string buffer
                fStringBuilder.setLength (0);
            }

            if (fDOMFilter !=null && !fInEntityRef) {
                if ( (child.getNodeType () == Node.TEXT_NODE ) &&
                ((fDOMFilter.getWhatToShow () & NodeFilter.SHOW_TEXT)!= 0) ) {
                    short code = fDOMFilter.acceptNode (child);
                    switch (code) {
                        case LSParserFilter.FILTER_INTERRUPT:{
                            throw Abort.INSTANCE;
                        }
                        case LSParserFilter.FILTER_REJECT:{
                            // fall through to SKIP since Comment has no children.
                        }
                        case LSParserFilter.FILTER_SKIP: {
                            fCurrentNode.removeChild (child);
                            return;
                        }
                        default: {
                            // accept node -- do nothing
                        }
                    }
                }
            }   // end-if fDOMFilter !=null

        } // end-if child !=null
    }


    
See Also:
abort.abort()/**
     * @see org.w3c.dom.ls.LSParser#abort()
     */
    public void abort () {
        throw Abort.INSTANCE;
    }


} // class AbstractDOMParser