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From minc...@apache.org
Subject svn commit: r471981 [2/6] - in /xalan/java/trunk/src/org/apache/xml/serializer: ./ dom3/ utils/
Date Tue, 07 Nov 2006 04:28:02 GMT
Added: xalan/java/trunk/src/org/apache/xml/serializer/dom3/DOM3TreeWalker.java
URL: http://svn.apache.org/viewvc/xalan/java/trunk/src/org/apache/xml/serializer/dom3/DOM3TreeWalker.java?view=auto&rev=471981
==============================================================================
--- xalan/java/trunk/src/org/apache/xml/serializer/dom3/DOM3TreeWalker.java (added)
+++ xalan/java/trunk/src/org/apache/xml/serializer/dom3/DOM3TreeWalker.java Mon Nov  6 20:28:00 2006
@@ -0,0 +1,2147 @@
+/*
+ * 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.
+ */
+/*
+ * $Id:  $
+ */
+
+package org.apache.xml.serializer.dom3;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.Writer;
+import java.util.Enumeration;
+import java.util.Hashtable;
+import java.util.Properties;
+
+import org.apache.xml.serializer.dom3.NamespaceSupport;
+import org.apache.xml.serializer.OutputPropertiesFactory;
+import org.apache.xml.serializer.SerializationHandler;
+import org.apache.xml.serializer.utils.MsgKey;
+import org.apache.xml.serializer.utils.Utils;
+import org.apache.xml.serializer.utils.XML11Char;
+import org.apache.xml.serializer.utils.XMLChar;
+import org.w3c.dom.Attr;
+import org.w3c.dom.CDATASection;
+import org.w3c.dom.Comment;
+import org.w3c.dom.DOMError;
+import org.w3c.dom.DOMErrorHandler;
+import org.w3c.dom.Document;
+import org.w3c.dom.DocumentType;
+import org.w3c.dom.Element;
+import org.w3c.dom.Entity;
+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.LSSerializerFilter;
+import org.w3c.dom.traversal.NodeFilter;
+import org.xml.sax.Locator;
+import org.xml.sax.SAXException;
+import org.xml.sax.ext.LexicalHandler;
+import org.xml.sax.helpers.LocatorImpl;
+
+/**
+ * Built on org.apache.xml.serializer.TreeWalker and adds functionality to
+ * traverse and serialize a DOM Node (Level 2 or Level 3) as specified in 
+ * the DOM Level 3 LS Recommedation by evaluating and applying DOMConfiguration 
+ * parameters and filters if any during serialization.
+ *   
+ * @xsl.usage internal
+ */
+final class DOM3TreeWalker {
+
+    /**
+     * The SerializationHandler, it extends ContentHandler and when
+     * this class is instantiated via the constructor provided, a
+     * SerializationHandler object is passed to it.
+     */
+    private SerializationHandler fSerializer = null;
+
+    /** We do not need DOM2Helper since DOM Level 3 LS applies to DOM Level 2 or newer */
+
+    /** Locator object for this TreeWalker          */
+    private LocatorImpl fLocator = new LocatorImpl();
+
+    /** ErrorHandler */
+    private DOMErrorHandler fErrorHandler = null;
+
+    /** LSSerializerFilter */
+    private LSSerializerFilter fFilter = null;
+
+    /** If the serializer is an instance of a LexicalHandler */
+    private LexicalHandler fLexicalHandler = null;
+
+    private int fWhatToShowFilter;
+
+    /** New Line character to use in serialization */
+    private char[] fNewLine = null;
+
+    /** DOMConfiguration Properties */
+    private Properties fDOMConfigProperties = null;
+
+    /** Keeps track if we are in an entity reference when entities=true */
+    private boolean fInEntityRef = false;
+
+    /** Stores the version of the XML document to be serialize */
+    private String fXMLVersion = null;
+
+    /** XML Version, default 1.0 */
+    private boolean fIsXMLVersion11 = false;
+
+    /** Is the Node a Level 3 DOM node */
+    private boolean fIsLevel3DOM = false;
+
+    /** DOM Configuration Parameters */
+    private int fFeatures = 0;
+
+    /** Flag indicating whether following text to be processed is raw text          */
+    boolean fNextIsRaw = false;
+
+    // 
+    private static final String XMLNS_URI = "http://www.w3.org/2000/xmlns/";
+
+    //
+    private static final String XMLNS_PREFIX = "xmlns";
+
+    // 
+    private static final String XML_URI = "http://www.w3.org/XML/1998/namespace";
+
+    // 
+    private static final String XML_PREFIX = "xml";
+
+    /** stores namespaces in scope */
+    protected NamespaceSupport fNSBinder;
+
+    /** stores all namespace bindings on the current element */
+    protected NamespaceSupport fLocalNSBinder;
+    
+    /** stores the current element depth */
+    private int fElementDepth = 0;
+
+    // ***********************************************************************
+    // DOMConfiguration paramter settings 
+    // ***********************************************************************
+    // Parameter canonical-form, true [optional] - NOT SUPPORTED 
+    private final static int CANONICAL = 0x1 << 0;
+
+    // Parameter cdata-sections, true [required] (default)
+    private final static int CDATA = 0x1 << 1;
+
+    // Parameter check-character-normalization, true [optional] - NOT SUPPORTED 
+    private final static int CHARNORMALIZE = 0x1 << 2;
+
+    // Parameter comments, true [required] (default)
+    private final static int COMMENTS = 0x1 << 3;
+
+    // Parameter datatype-normalization, true [optional] - NOT SUPPORTED
+    private final static int DTNORMALIZE = 0x1 << 4;
+
+    // Parameter element-content-whitespace, true [required] (default) - value - false [optional] NOT SUPPORTED
+    private final static int ELEM_CONTENT_WHITESPACE = 0x1 << 5;
+
+    // Parameter entities, true [required] (default)
+    private final static int ENTITIES = 0x1 << 6;
+
+    // Parameter infoset, true [required] (default), false has no effect --> True has no effect for the serializer
+    private final static int INFOSET = 0x1 << 7;
+
+    // Parameter namespaces, true [required] (default)
+    private final static int NAMESPACES = 0x1 << 8;
+
+    // Parameter namespace-declarations, true [required] (default)
+    private final static int NAMESPACEDECLS = 0x1 << 9;
+
+    // Parameter normalize-characters, true [optional] - NOT SUPPORTED
+    private final static int NORMALIZECHARS = 0x1 << 10;
+
+    // Parameter split-cdata-sections, true [required] (default)
+    private final static int SPLITCDATA = 0x1 << 11;
+
+    // Parameter validate, true [optional] - NOT SUPPORTED
+    private final static int VALIDATE = 0x1 << 12;
+
+    // Parameter validate-if-schema, true [optional] - NOT SUPPORTED
+    private final static int SCHEMAVALIDATE = 0x1 << 13;
+
+    // Parameter split-cdata-sections, true [required] (default)
+    private final static int WELLFORMED = 0x1 << 14;
+
+    // Parameter discard-default-content, true [required] (default)
+    // Not sure how this will be used in level 2 Documents
+    private final static int DISCARDDEFAULT = 0x1 << 15;
+
+    // Parameter format-pretty-print, true [optional] 
+    private final static int PRETTY_PRINT = 0x1 << 16;
+
+    // Parameter ignore-unknown-character-denormalizations, true [required] (default)
+    // We currently do not support XML 1.1 character normalization
+    private final static int IGNORE_CHAR_DENORMALIZE = 0x1 << 17;
+
+    // Parameter discard-default-content, true [required] (default)
+    private final static int XMLDECL = 0x1 << 18;
+
+    /**
+     * Constructor.
+     * @param   contentHandler serialHandler The implemention of the SerializationHandler interface
+     */
+    DOM3TreeWalker(
+        SerializationHandler serialHandler,
+        DOMErrorHandler errHandler,
+        LSSerializerFilter filter,
+        char[] newLine) {
+        fSerializer = serialHandler;
+        //fErrorHandler = errHandler == null ? new DOMErrorHandlerImpl() : errHandler; // Should we be using the default?
+        fErrorHandler = errHandler;
+        fFilter = filter;
+        fLexicalHandler = null;
+        fNewLine = newLine;
+
+        fNSBinder = new NamespaceSupport();
+        fLocalNSBinder = new NamespaceSupport();
+        
+        fDOMConfigProperties = fSerializer.getOutputFormat();
+        fSerializer.setDocumentLocator(fLocator);
+        initProperties(fDOMConfigProperties);
+        
+        try {
+            // Bug see Bugzilla  26741
+            fLocator.setSystemId(
+                System.getProperty("user.dir") + File.separator + "dummy.xsl");
+        } catch (SecurityException se) { // user.dir not accessible from applet
+
+        }
+    }
+
+    /**
+     * Perform a pre-order traversal non-recursive style.  
+     *
+     * Note that TreeWalker assumes that the subtree is intended to represent 
+     * a complete (though not necessarily well-formed) document and, during a 
+     * traversal, startDocument and endDocument will always be issued to the 
+     * SAX listener.
+     *  
+     * @param pos Node in the tree where to start traversal
+     *
+     * @throws TransformerException
+     */
+    public void traverse(Node pos) throws org.xml.sax.SAXException {
+        this.fSerializer.startDocument();
+
+        // Determine if the Node is a DOM Level 3 Core Node.
+        if (pos.getNodeType() != Node.DOCUMENT_NODE) {
+            Document ownerDoc = pos.getOwnerDocument();
+            if (ownerDoc != null
+                && ownerDoc.getImplementation().hasFeature("Core", "3.0")) {
+                fIsLevel3DOM = true;
+            }
+        } else {
+            if (((Document) pos)
+                .getImplementation()
+                .hasFeature("Core", "3.0")) {
+                fIsLevel3DOM = true;
+            }
+        }
+
+        if (fSerializer instanceof LexicalHandler) {
+            fLexicalHandler = ((LexicalHandler) this.fSerializer);
+        }
+
+        if (fFilter != null)
+            fWhatToShowFilter = fFilter.getWhatToShow();
+
+        Node top = pos;
+
+        while (null != pos) {
+            startNode(pos);
+
+            Node nextNode = null;
+
+            nextNode = pos.getFirstChild();
+
+            while (null == nextNode) {
+                endNode(pos);
+
+                if (top.equals(pos))
+                    break;
+
+                nextNode = pos.getNextSibling();
+
+                if (null == nextNode) {
+                    pos = pos.getParentNode();
+
+                    if ((null == pos) || (top.equals(pos))) {
+                        if (null != pos)
+                            endNode(pos);
+
+                        nextNode = null;
+
+                        break;
+                    }
+                }
+            }
+
+            pos = nextNode;
+        }
+        this.fSerializer.endDocument();
+    }
+
+    /**
+     * Perform a pre-order traversal non-recursive style.
+     
+     * Note that TreeWalker assumes that the subtree is intended to represent 
+     * a complete (though not necessarily well-formed) document and, during a 
+     * traversal, startDocument and endDocument will always be issued to the 
+     * SAX listener.
+     *
+     * @param pos Node in the tree where to start traversal
+     * @param top Node in the tree where to end traversal
+     *
+     * @throws TransformerException
+     */
+    public void traverse(Node pos, Node top) throws org.xml.sax.SAXException {
+
+        this.fSerializer.startDocument();
+
+        // Determine if the Node is a DOM Level 3 Core Node.
+        if (pos.getNodeType() != Node.DOCUMENT_NODE) {
+            Document ownerDoc = pos.getOwnerDocument();
+            if (ownerDoc != null
+                && ownerDoc.getImplementation().hasFeature("Core", "3.0")) {
+                fIsLevel3DOM = true;
+            }
+        } else {
+            if (((Document) pos)
+                .getImplementation()
+                .hasFeature("Core", "3.0")) {
+                fIsLevel3DOM = true;
+            }
+        }
+
+        if (fSerializer instanceof LexicalHandler) {
+            fLexicalHandler = ((LexicalHandler) this.fSerializer);
+        }
+
+        if (fFilter != null)
+            fWhatToShowFilter = fFilter.getWhatToShow();
+
+        while (null != pos) {
+            startNode(pos);
+
+            Node nextNode = null;
+
+            nextNode = pos.getFirstChild();
+
+            while (null == nextNode) {
+                endNode(pos);
+
+                if ((null != top) && top.equals(pos))
+                    break;
+
+                nextNode = pos.getNextSibling();
+
+                if (null == nextNode) {
+                    pos = pos.getParentNode();
+
+                    if ((null == pos) || ((null != top) && top.equals(pos))) {
+                        nextNode = null;
+
+                        break;
+                    }
+                }
+            }
+
+            pos = nextNode;
+        }
+        this.fSerializer.endDocument();
+    }
+
+    /**
+     * Optimized dispatch of characters.
+     */
+    private final void dispatachChars(Node node)
+        throws org.xml.sax.SAXException {
+        if (fSerializer != null) {
+            this.fSerializer.characters(node);
+        } else {
+            String data = ((Text) node).getData();
+            this.fSerializer.characters(data.toCharArray(), 0, data.length());
+        }
+    }
+
+    /**
+     * Start processing given node
+     *
+     * @param node Node to process
+     *
+     * @throws org.xml.sax.SAXException
+     */
+    protected void startNode(Node node) throws org.xml.sax.SAXException {
+        if (node instanceof Locator) {
+            Locator loc = (Locator) node;
+            fLocator.setColumnNumber(loc.getColumnNumber());
+            fLocator.setLineNumber(loc.getLineNumber());
+            fLocator.setPublicId(loc.getPublicId());
+            fLocator.setSystemId(loc.getSystemId());
+        } else {
+            fLocator.setColumnNumber(0);
+            fLocator.setLineNumber(0);
+        }
+
+        switch (node.getNodeType()) {
+            case Node.DOCUMENT_TYPE_NODE :
+                serializeDocType((DocumentType) node, true);
+                break;
+            case Node.COMMENT_NODE :
+                serializeComment((Comment) node);
+                break;
+            case Node.DOCUMENT_FRAGMENT_NODE :
+                // Children are traversed
+                break;
+            case Node.DOCUMENT_NODE :
+                break;
+            case Node.ELEMENT_NODE :
+                serializeElement((Element) node, true);
+                break;
+            case Node.PROCESSING_INSTRUCTION_NODE :
+                serializePI((ProcessingInstruction) node);
+                break;
+            case Node.CDATA_SECTION_NODE :
+                serializeCDATASection((CDATASection) node);
+                break;
+            case Node.TEXT_NODE :
+                serializeText((Text) node);
+                break;
+            case Node.ENTITY_REFERENCE_NODE :
+                serializeEntityReference((EntityReference) node, true);
+                break;
+            default :
+                }
+    }
+
+    /**
+     * End processing of given node 
+     *
+     *
+     * @param node Node we just finished processing
+     *
+     * @throws org.xml.sax.SAXException
+     */
+    protected void endNode(Node node) throws org.xml.sax.SAXException {
+
+        switch (node.getNodeType()) {
+            case Node.DOCUMENT_NODE :
+                break;
+            case Node.DOCUMENT_TYPE_NODE :
+                serializeDocType((DocumentType) node, false);
+                break;
+            case Node.ELEMENT_NODE :
+                serializeElement((Element) node, false);
+                break;
+            case Node.CDATA_SECTION_NODE :
+                break;
+            case Node.ENTITY_REFERENCE_NODE :
+                serializeEntityReference((EntityReference) node, false);
+                break;
+            default :
+                }
+    }
+
+    // ***********************************************************************
+    // Node serialization methods
+    // ***********************************************************************
+    /**
+     * Applies a filter on the node to serialize
+     * 
+     * @param node The Node to serialize
+     * @return True if the node is to be serialized else false if the node 
+     *         is to be rejected or skipped. 
+     */
+    protected boolean applyFilter(Node node, int nodeType) {
+        if (fFilter != null && (fWhatToShowFilter & nodeType) != 0) {
+
+            short code = fFilter.acceptNode(node);
+            switch (code) {
+                case NodeFilter.FILTER_REJECT :
+                case NodeFilter.FILTER_SKIP :
+                    return false; // skip the node
+                default : // fall through..
+            }
+        }
+        return true;
+    }
+
+    /**
+     * Serializes a Document Type Node.
+     * 
+     * @param node The Docuemnt Type Node to serialize
+     * @param bStart Invoked at the start or end of node.  Default true. 
+     */
+    protected void serializeDocType(DocumentType node, boolean bStart)
+        throws SAXException {
+        // The DocType and internalSubset can not be modified in DOM and is
+        // considered to be well-formed as the outcome of successful parsing.
+        String docTypeName = node.getNodeName();
+        String publicId = node.getPublicId();
+        String systemId = node.getSystemId();
+        String internalSubset = node.getInternalSubset();
+
+        //DocumentType nodes are never passed to the filter
+        
+        if (internalSubset != null && !"".equals(internalSubset)) {
+
+            if (bStart) {
+                try {
+                    // The Serializer does not provide a way to write out the
+                    // DOCTYPE internal subset via an event call, so we write it
+                    // out here.
+                    Writer writer = fSerializer.getWriter();
+                    StringBuffer dtd = new StringBuffer();
+
+                    dtd.append("<!DOCTYPE ");
+                    dtd.append(docTypeName);
+                    if (null != publicId) {
+                        dtd.append(" PUBLIC \"");
+                        dtd.append(publicId);
+                        dtd.append('\"');
+                    }
+
+                    if (null != systemId) {
+                        if (null == publicId) {
+                            dtd.append(" SYSTEM \"");
+                        } else {
+                            dtd.append(" \"");
+                        }    
+                        dtd.append(systemId);
+                        dtd.append('\"');
+                    }
+                    
+                    dtd.append(" [ ");
+                    
+                    dtd.append(fNewLine);
+                    dtd.append(internalSubset);
+                    dtd.append("]>");
+                    dtd.append(new String(fNewLine));
+                    
+                    writer.write(dtd.toString());
+                    writer.flush();
+                    
+                } catch (IOException e) {
+                    throw new SAXException(Utils.messages.createMessage(
+                            MsgKey.ER_WRITING_INTERNAL_SUBSET, null), e);
+                }
+            } // else if !bStart do nothing
+            
+        } else {
+            
+            if (bStart) {
+                if (fLexicalHandler != null) {
+                    fLexicalHandler.startDTD(docTypeName, publicId, systemId);
+                }
+            } else {
+                if (fLexicalHandler != null) {
+                    fLexicalHandler.endDTD();
+                }
+            }
+        }
+    }
+
+    /**
+     * Serializes a Comment Node.
+     * 
+     * @param node The Comment Node to serialize
+     */
+    protected void serializeComment(Comment node) throws SAXException {
+        // comments=true
+        if ((fFeatures & COMMENTS) != 0) {
+            String data = node.getData();
+
+            // well-formed=true
+            if ((fFeatures & WELLFORMED) != 0) {
+                isCommentWellFormed(data);
+            }
+
+            if (fLexicalHandler != null) {
+                // apply the LSSerializer filter after the operations requested by the 
+                // DOMConfiguration parameters have been applied 
+                if (!applyFilter(node, NodeFilter.SHOW_COMMENT)) {
+                    return;
+                }
+
+                fLexicalHandler.comment(data.toCharArray(), 0, data.length());
+            }
+        }
+    }
+
+    /**
+     * Serializes an Element Node.
+     * 
+     * @param node The Element Node to serialize
+     * @param bStart Invoked at the start or end of node.   
+     */
+    protected void serializeElement(Element node, boolean bStart)
+        throws SAXException {
+        if (bStart) {
+            fElementDepth++;
+
+            // We use the Xalan specific startElement and starPrefixMapping calls 
+            // (and addAttribute and namespaceAfterStartElement) as opposed to
+            // SAX specific, for performance reasons as they reduce the overhead
+            // of creating an AttList object upfront.
+
+            // well-formed=true
+            if ((fFeatures & WELLFORMED) != 0) {
+                isElementWellFormed(node);
+            }
+
+            // REVISIT: We apply the LSSerializer filter for elements before
+            // namesapce fixup
+            if (!applyFilter(node, NodeFilter.SHOW_ELEMENT)) {
+                return;
+            }
+
+            // namespaces=true, record and fixup namspaced element
+            if ((fFeatures & NAMESPACES) != 0) {
+            	fNSBinder.pushContext();
+            	fLocalNSBinder.reset();
+            	
+                recordLocalNSDecl(node);
+                fixupElementNS(node);
+            }
+
+            // Namespace normalization
+            fSerializer.startElement(
+            		node.getNamespaceURI(),
+                    node.getLocalName(),
+                    node.getNodeName());
+
+            serializeAttList(node);
+            
+        } else {
+        	fElementDepth--;
+
+            // apply the LSSerializer filter
+            if (!applyFilter(node, NodeFilter.SHOW_ELEMENT)) {
+                return;
+            }
+
+            this.fSerializer.endElement(
+            	node.getNamespaceURI(),
+                node.getLocalName(),
+                node.getNodeName());
+            // since endPrefixMapping was not used by SerializationHandler it was removed
+            // for performance reasons.
+
+            if ((fFeatures & NAMESPACES) != 0 ) {
+                    fNSBinder.popContext();
+            }
+            
+        }
+    }
+
+    /**
+     * Serializes the Attr Nodes of an Element.
+     * 
+     * @param node The OwnerElement whose Attr Nodes are to be serialized.
+     */
+    protected void serializeAttList(Element node) throws SAXException {
+        NamedNodeMap atts = node.getAttributes();
+        int nAttrs = atts.getLength();
+
+        for (int i = 0; i < nAttrs; i++) {
+            Node attr = atts.item(i);
+
+            String localName = attr.getLocalName();
+            String attrName = attr.getNodeName();
+            String attrPrefix = attr.getPrefix() == null ? "" : attr.getPrefix();
+            String attrValue = attr.getNodeValue();
+
+            // Determine the Attr's type.
+            String type = null;
+            if (fIsLevel3DOM) {
+                type = ((Attr) attr).getSchemaTypeInfo().getTypeName();
+            }
+            type = type == null ? "CDATA" : type;
+
+            String attrNS = attr.getNamespaceURI();
+            if (attrNS !=null && attrNS.length() == 0) {
+            	attrNS=null;
+                // we must remove prefix for this attribute
+            	attrName=attr.getLocalName();
+            }
+
+            boolean isSpecified = ((Attr) attr).getSpecified();
+            boolean addAttr = true;
+            boolean applyFilter = false;
+            boolean xmlnsAttr =
+                attrName.equals("xmlns") || attrName.startsWith("xmlns:");
+
+            // well-formed=true
+            if ((fFeatures & WELLFORMED) != 0) {
+                isAttributeWellFormed(attr);
+            }
+            
+            //-----------------------------------------------------------------
+            // start Attribute namespace fixup
+            //-----------------------------------------------------------------
+            // namespaces=true, normalize all non-namespace attributes
+            // Step 3. Attribute
+            if ((fFeatures & NAMESPACES) != 0 && !xmlnsAttr) {
+           	
+        		// If the Attr has a namespace URI
+        		if (attrNS != null) {
+        			attrPrefix = attrPrefix == null ? "" : attrPrefix;
+
+        			String declAttrPrefix = fNSBinder.getPrefix(attrNS);
+        			String declAttrNS = fNSBinder.getURI(attrPrefix);
+        			
+        			// attribute has no prefix (default namespace decl does not apply to
+        			// attributes)
+        			// OR
+        			// attribute prefix is not declared
+        			// OR
+        			// conflict: attribute has a prefix that conflicts with a binding
+        			if ("".equals(attrPrefix) || "".equals(declAttrPrefix)
+        					|| !attrPrefix.equals(declAttrPrefix)) {
+
+        				// namespaceURI matches an in scope declaration of one or
+        				// more prefixes
+        				if (declAttrPrefix != null && !"".equals(declAttrPrefix)) {
+        					// pick the prefix that was found and change attribute's
+        					// prefix and nodeName.
+        					attrPrefix = declAttrPrefix;
+        					
+        					if (declAttrPrefix.length() > 0 ) { 
+        						attrName = declAttrPrefix + ":" + localName;
+        					} else {
+        						attrName = localName;
+        					}	
+        				} else {
+        					// The current prefix is not null and it has no in scope
+        					// declaration
+        					if (attrPrefix != null && !"".equals(attrPrefix)
+        							&& declAttrNS == null) {
+        						// declare this prefix
+        						if ((fFeatures & NAMESPACEDECLS) != 0) {
+        							fSerializer.addAttribute(XMLNS_URI, attrPrefix,
+        									XMLNS_PREFIX + ":" + attrPrefix, "CDATA",
+        									attrNS);
+        							fNSBinder.declarePrefix(attrPrefix, attrNS);
+        							fLocalNSBinder.declarePrefix(attrPrefix, attrNS);
+        						}
+        					} else {
+        						// find a prefix following the pattern "NS" +index
+        						// (starting at 1)
+        						// make sure this prefix is not declared in the current
+        						// scope.
+        						int counter = 1;
+        						attrPrefix = "NS" + counter++;
+
+        						while (fLocalNSBinder.getURI(attrPrefix) != null) {
+        							attrPrefix = "NS" + counter++;
+        						}
+        						// change attribute's prefix and Name
+        						attrName = attrPrefix + ":" + localName;
+        						
+        						// create a local namespace declaration attribute
+        						// Add the xmlns declaration attribute
+        						if ((fFeatures & NAMESPACEDECLS) != 0) {
+                                       							
+        							fSerializer.addAttribute(XMLNS_URI, attrPrefix,
+        									XMLNS_PREFIX + ":" + attrPrefix, "CDATA",
+        									attrNS);
+            						fNSBinder.declarePrefix(attrPrefix, attrNS);
+            						fLocalNSBinder.declarePrefix(attrPrefix, attrNS);
+        						}
+        					}
+        				}
+        			}
+
+        		} else { // if the Attr has no namespace URI
+        			// Attr has no localName
+        			if (localName == null) {
+        				// DOM Level 1 node!
+        				String msg = Utils.messages.createMessage(
+        						MsgKey.ER_NULL_LOCAL_ELEMENT_NAME,
+        						new Object[] { attrName });
+
+        				if (fErrorHandler != null) {
+        					fErrorHandler
+        							.handleError(new DOMErrorImpl(
+        									DOMError.SEVERITY_ERROR, msg,
+        									MsgKey.ER_NULL_LOCAL_ELEMENT_NAME, null,
+        									null, null));
+        				}
+
+        			} else { // uri=null and no colon
+        				// attr has no namespace URI and no prefix
+        				// no action is required, since attrs don't use default
+        			}
+        		}
+
+            }
+
+            
+            // discard-default-content=true
+            // Default attr's are not passed to the filter and this contraint
+            // is applied only when discard-default-content=true 
+            // What about default xmlns attributes???? check for xmlnsAttr
+            if ((((fFeatures & DISCARDDEFAULT) != 0) && isSpecified)
+                || ((fFeatures & DISCARDDEFAULT) == 0)) {
+                applyFilter = true;
+            } else {
+            	addAttr = false;
+            }
+
+            if (applyFilter) {
+                // apply the filter for Attributes that are not default attributes
+                // or namespace decl attributes
+                if (fFilter != null
+                    && (fFilter.getWhatToShow() & NodeFilter.SHOW_ATTRIBUTE)
+                        != 0) {
+
+                    if (!xmlnsAttr) {
+                        short code = fFilter.acceptNode(attr);
+                        switch (code) {
+                            case NodeFilter.FILTER_REJECT :
+                            case NodeFilter.FILTER_SKIP :
+                                addAttr = false;
+                                break;
+                            default : //fall through..
+                        }
+                    }
+                }
+            }
+
+            // if the node is a namespace node
+            if (addAttr && xmlnsAttr) {
+                // If namespace-declarations=true, add the node , else don't add it
+                if ((fFeatures & NAMESPACEDECLS) != 0) {
+               		// The namespace may have been fixed up, in that case don't add it.
+                	if (localName != null && !"".equals(localName)) {
+                		fSerializer.addAttribute(attrNS, localName, attrName, type, attrValue);
+                	} 
+                }
+            } else if (
+                addAttr && !xmlnsAttr) { // if the node is not a namespace node
+                // If namespace-declarations=true, add the node with the Attr nodes namespaceURI
+                // else add the node setting it's namespace to null or else the serializer will later
+                // attempt to add a xmlns attr for the prefixed attribute
+                if (((fFeatures & NAMESPACEDECLS) != 0) && (attrNS != null)) {
+                    fSerializer.addAttribute(
+                        attrNS,
+                        localName,
+                        attrName,
+                        type,
+                        attrValue);
+                } else {
+                    fSerializer.addAttribute(
+                        "",
+                        localName,
+                        attrName,
+                        type,
+                        attrValue);
+                }
+            }
+
+            // 
+            if (xmlnsAttr && ((fFeatures & NAMESPACEDECLS) != 0)) {
+                int index;
+                // Use "" instead of null, as Xerces likes "" for the 
+                // name of the default namespace.  Fix attributed 
+                // to "Steven Murray" <smurray@ebt.com>.
+                String prefix =
+                    (index = attrName.indexOf(":")) < 0
+                        ? ""
+                        : attrName.substring(index + 1);
+
+                if (!"".equals(prefix)) {
+                    fSerializer.namespaceAfterStartElement(prefix, attrValue);
+                }
+            }
+        }
+        
+    }
+   
+    /**
+     * Serializes an ProcessingInstruction Node.
+     * 
+     * @param node The ProcessingInstruction Node to serialize
+     */
+    protected void serializePI(ProcessingInstruction node)
+        throws SAXException {
+        ProcessingInstruction pi = node;
+        String name = pi.getNodeName();
+
+        // well-formed=true
+        if ((fFeatures & WELLFORMED) != 0) {
+            isPIWellFormed(node);
+        }
+
+        // apply the LSSerializer filter
+        if (!applyFilter(node, NodeFilter.SHOW_PROCESSING_INSTRUCTION)) {
+            return;
+        }
+
+        // String data = pi.getData();
+        if (name.equals("xslt-next-is-raw")) {
+            fNextIsRaw = true;
+        } else {
+            this.fSerializer.processingInstruction(name, pi.getData());
+        }
+    }
+
+    /**
+     * Serializes an CDATASection Node.
+     * 
+     * @param node The CDATASection Node to serialize
+     */
+    protected void serializeCDATASection(CDATASection node)
+        throws SAXException {
+        // well-formed=true
+        if ((fFeatures & WELLFORMED) != 0) {
+            isCDATASectionWellFormed(node);
+        }
+
+        // cdata-sections = true
+        if ((fFeatures & CDATA) != 0) {
+
+            // split-cdata-sections = true
+            // Assumption: This parameter has an effect only when
+			// cdata-sections=true
+            // ToStream, by default splits cdata-sections. Hence the check
+			// below.
+            String nodeValue = node.getNodeValue();
+            int endIndex = nodeValue.indexOf("]]>");
+            if ((fFeatures & SPLITCDATA) != 0) {
+                if (endIndex >= 0) {
+                    // The first node split will contain the ]] markers
+                    String relatedData = nodeValue.substring(0, endIndex + 2);
+
+                    String msg =
+                        Utils.messages.createMessage(
+                            MsgKey.ER_CDATA_SECTIONS_SPLIT,
+                            null);
+
+                    if (fErrorHandler != null) {
+                        fErrorHandler.handleError(
+                            new DOMErrorImpl(
+                                DOMError.SEVERITY_WARNING,
+                                msg,
+                                MsgKey.ER_CDATA_SECTIONS_SPLIT,
+                                null,
+                                relatedData,
+                                null));
+                    }
+                }
+            } else {
+                if (endIndex >= 0) {
+                    // The first node split will contain the ]] markers 
+                    String relatedData = nodeValue.substring(0, endIndex + 2);
+
+                    String msg =
+                        Utils.messages.createMessage(
+                            MsgKey.ER_CDATA_SECTIONS_SPLIT,
+                            null);
+
+                    if (fErrorHandler != null) {
+                        fErrorHandler.handleError(
+                            new DOMErrorImpl(
+                                DOMError.SEVERITY_ERROR,
+                                msg,
+                                MsgKey.ER_CDATA_SECTIONS_SPLIT));
+                    }
+                    // Report an error and return.  What error???
+                    return;
+                }
+            }
+
+            // apply the LSSerializer filter
+            if (!applyFilter(node, NodeFilter.SHOW_CDATA_SECTION)) {
+                return;
+            }
+
+            // splits the cdata-section
+            if (fLexicalHandler != null) {
+                fLexicalHandler.startCDATA();
+            }
+            dispatachChars(node);
+            if (fLexicalHandler != null) {
+                fLexicalHandler.endCDATA();
+            }
+        } else {
+            dispatachChars(node);
+        }
+    }
+
+    /**
+     * Serializes an Text Node.
+     * 
+     * @param node The Text Node to serialize
+     */
+    protected void serializeText(Text node) throws SAXException {
+        if (fNextIsRaw) {
+            fNextIsRaw = false;
+            fSerializer.processingInstruction(
+                javax.xml.transform.Result.PI_DISABLE_OUTPUT_ESCAPING,
+                "");
+            dispatachChars(node);
+            fSerializer.processingInstruction(
+                javax.xml.transform.Result.PI_ENABLE_OUTPUT_ESCAPING,
+                "");
+        } else {
+            // keep track of dispatch or not to avoid duplicaiton of filter code
+            boolean bDispatch = false;
+
+            // well-formed=true
+            if ((fFeatures & WELLFORMED) != 0) {
+                isTextWellFormed(node);
+            }
+
+            // if the node is whitespace
+            // Determine the Attr's type.
+            boolean isElementContentWhitespace = false;
+            if (fIsLevel3DOM) {
+                isElementContentWhitespace =
+                       node.isElementContentWhitespace();
+            }
+
+            if (isElementContentWhitespace) {
+                // element-content-whitespace=true
+                if ((fFeatures & ELEM_CONTENT_WHITESPACE) != 0) {
+                    bDispatch = true;
+                }
+            } else {
+                bDispatch = true;
+            }
+
+            // apply the LSSerializer filter
+            if (!applyFilter(node, NodeFilter.SHOW_TEXT)) {
+                return;
+            }
+
+            if (bDispatch) {
+                dispatachChars(node);
+            }
+        }
+    }
+
+    /**
+     * Serializes an EntityReference Node.
+     * 
+     * @param node The EntityReference Node to serialize
+     * @param bStart Inicates if called from start or endNode 
+     */
+    protected void serializeEntityReference(
+        EntityReference node,
+        boolean bStart)
+        throws SAXException {
+        if (bStart) {
+            EntityReference eref = node;
+            // entities=true
+            if ((fFeatures & ENTITIES) != 0) {
+                
+                // perform well-formedness and other checking only if 
+                // entities = true
+
+                // well-formed=true
+                if ((fFeatures & WELLFORMED) != 0) {
+                    isEntityReferneceWellFormed(node);
+                }
+
+                // check "unbound-prefix-in-entity-reference" [fatal] 
+                // Raised if the configuration parameter "namespaces" is set to true
+                if ((fFeatures & NAMESPACES) != 0) {
+                    checkUnboundPrefixInEntRef(node);
+                }
+
+                // The filter should not apply in this case, since the
+                // EntityReference is not being expanded.
+                // should we pass entity reference nodes to the filter???
+            } 
+            
+            if (fLexicalHandler != null) {
+
+                // startEntity outputs only Text but not Element, Attr, Comment 
+                // and PI child nodes.  It does so by setting the m_inEntityRef 
+                // in ToStream and using this to decide if a node is to be 
+                // serialized or not.
+                fLexicalHandler.startEntity(eref.getNodeName());
+            } 
+
+        } else {
+            EntityReference eref = node;
+            // entities=true or false, 
+            if (fLexicalHandler != null) {
+                fLexicalHandler.endEntity(eref.getNodeName());
+            }
+        }
+    }
+
+    
+    // ***********************************************************************
+    // Methods to check well-formedness
+    // ***********************************************************************
+    /**
+     * Taken from org.apache.xerces.dom.CoreDocumentImpl
+     * 
+     * Check the string against XML's definition of acceptable names for
+     * elements and attributes and so on using the XMLCharacterProperties
+     * utility class
+     */
+    protected boolean isXMLName(String s, boolean xml11Version) {
+
+        if (s == null) {
+            return false;
+        }
+        if (!xml11Version)
+            return XMLChar.isValidName(s);
+        else
+            return XML11Char.isXML11ValidName(s);
+    }
+
+    /**
+     * Taken from org.apache.xerces.dom.CoreDocumentImpl
+     *  
+     * Checks if the given qualified name is legal with respect
+     * to the version of XML to which this document must conform.
+     *
+     * @param prefix prefix of qualified name
+     * @param local local part of qualified name
+     */
+    protected boolean isValidQName(
+        String prefix,
+        String local,
+        boolean xml11Version) {
+
+        // check that both prefix and local part match NCName
+        if (local == null)
+            return false;
+        boolean validNCName = false;
+
+        if (!xml11Version) {
+            validNCName =
+                (prefix == null || XMLChar.isValidNCName(prefix))
+                    && XMLChar.isValidNCName(local);
+        } else {
+            validNCName =
+                (prefix == null || XML11Char.isXML11ValidNCName(prefix))
+                    && XML11Char.isXML11ValidNCName(local);
+        }
+
+        return validNCName;
+    }
+
+    /**
+     * Checks if a XML character is well-formed
+     * 
+     * @param characters A String of characters to be checked for Well-Formedness
+     * @param refInvalidChar A reference to the character to be returned that was determined invalid. 
+     */
+    protected boolean isWFXMLChar(String chardata, Character refInvalidChar) {
+        if (chardata == null || (chardata.length() == 0)) {
+            return true;
+        }
+
+        char[] dataarray = chardata.toCharArray();
+        int datalength = dataarray.length;
+
+        // version of the document is XML 1.1
+        if (fIsXMLVersion11) {
+            //we need to check all characters as per production rules of XML11
+            int i = 0;
+            while (i < datalength) {
+                if (XML11Char.isXML11Invalid(dataarray[i++])) {
+                    // check if this is a supplemental character
+                    char ch = dataarray[i - 1];
+                    if (XMLChar.isHighSurrogate(ch) && i < datalength) {
+                        char ch2 = dataarray[i++];
+                        if (XMLChar.isLowSurrogate(ch2)
+                            && XMLChar.isSupplemental(
+                                XMLChar.supplemental(ch, ch2))) {
+                            continue;
+                        }
+                    }
+                    // Reference to invalid character which is returned
+                    refInvalidChar = new Character(ch);
+                    return false;
+                }
+            }
+        } // version of the document is XML 1.0
+        else {
+            // we need to check all characters as per production rules of XML 1.0
+            int i = 0;
+            while (i < datalength) {
+                if (XMLChar.isInvalid(dataarray[i++])) {
+                    // check if this is a supplemental character
+                    char ch = dataarray[i - 1];
+                    if (XMLChar.isHighSurrogate(ch) && i < datalength) {
+                        char ch2 = dataarray[i++];
+                        if (XMLChar.isLowSurrogate(ch2)
+                            && XMLChar.isSupplemental(
+                                XMLChar.supplemental(ch, ch2))) {
+                            continue;
+                        }
+                    }
+                    // Reference to invalid character which is returned                    
+                    refInvalidChar = new Character(ch);
+                    return false;
+                }
+            }
+        } // end-else fDocument.isXMLVersion()
+
+        return true;
+    } // isXMLCharWF
+
+    /**
+     * Checks if a XML character is well-formed.  If there is a problem with
+     * the character a non-null Character is returned else null is returned.
+     * 
+     * @param characters A String of characters to be checked for Well-Formedness
+     * @return Character A reference to the character to be returned that was determined invalid. 
+     */
+    protected Character isWFXMLChar(String chardata) {
+    	Character refInvalidChar;
+        if (chardata == null || (chardata.length() == 0)) {
+            return null;
+        }
+
+        char[] dataarray = chardata.toCharArray();
+        int datalength = dataarray.length;
+
+        // version of the document is XML 1.1
+        if (fIsXMLVersion11) {
+            //we need to check all characters as per production rules of XML11
+            int i = 0;
+            while (i < datalength) {
+                if (XML11Char.isXML11Invalid(dataarray[i++])) {
+                    // check if this is a supplemental character
+                    char ch = dataarray[i - 1];
+                    if (XMLChar.isHighSurrogate(ch) && i < datalength) {
+                        char ch2 = dataarray[i++];
+                        if (XMLChar.isLowSurrogate(ch2)
+                            && XMLChar.isSupplemental(
+                                XMLChar.supplemental(ch, ch2))) {
+                            continue;
+                        }
+                    }
+                    // Reference to invalid character which is returned
+                    refInvalidChar = new Character(ch);
+                    return refInvalidChar;
+                }
+            }
+        } // version of the document is XML 1.0
+        else {
+            // we need to check all characters as per production rules of XML 1.0
+            int i = 0;
+            while (i < datalength) {
+                if (XMLChar.isInvalid(dataarray[i++])) {
+                    // check if this is a supplemental character
+                    char ch = dataarray[i - 1];
+                    if (XMLChar.isHighSurrogate(ch) && i < datalength) {
+                        char ch2 = dataarray[i++];
+                        if (XMLChar.isLowSurrogate(ch2)
+                            && XMLChar.isSupplemental(
+                                XMLChar.supplemental(ch, ch2))) {
+                            continue;
+                        }
+                    }
+                    // Reference to invalid character which is returned                    
+                    refInvalidChar = new Character(ch);
+                    return refInvalidChar;
+                }
+            }
+        } // end-else fDocument.isXMLVersion()
+
+        return null;
+    } // isXMLCharWF
+
+    /**
+     * Checks if a comment node is well-formed
+     * 
+     * @param data The contents of the comment node
+     * @return a boolean indiacating if the comment is well-formed or not.
+     */
+    protected void isCommentWellFormed(String data) {
+        if (data == null || (data.length() == 0)) {
+            return;
+        }
+
+        char[] dataarray = data.toCharArray();
+        int datalength = dataarray.length;
+
+        // version of the document is XML 1.1
+        if (fIsXMLVersion11) {
+            // we need to check all chracters as per production rules of XML11
+            int i = 0;
+            while (i < datalength) {
+                char c = dataarray[i++];
+                if (XML11Char.isXML11Invalid(c)) {
+                    // check if this is a supplemental character
+                    if (XMLChar.isHighSurrogate(c) && i < datalength) {
+                        char c2 = dataarray[i++];
+                        if (XMLChar.isLowSurrogate(c2)
+                            && XMLChar.isSupplemental(
+                                XMLChar.supplemental(c, c2))) {
+                            continue;
+                        }
+                    }
+                    String msg =
+                        Utils.messages.createMessage(
+                            MsgKey.ER_WF_INVALID_CHARACTER_IN_COMMENT,
+                            new Object[] { new Character(c)});
+
+                    if (fErrorHandler != null) {
+                        fErrorHandler.handleError(
+                            new DOMErrorImpl(
+                                DOMError.SEVERITY_FATAL_ERROR,
+                                msg,
+                                MsgKey.ER_WF_INVALID_CHARACTER,
+                                null,
+                                null,
+                                null));
+                    }
+                } else if (c == '-' && i < datalength && dataarray[i] == '-') {
+                    String msg =
+                        Utils.messages.createMessage(
+                            MsgKey.ER_WF_DASH_IN_COMMENT,
+                            null);
+
+                    if (fErrorHandler != null) {
+                        fErrorHandler.handleError(
+                            new DOMErrorImpl(
+                                DOMError.SEVERITY_FATAL_ERROR,
+                                msg,
+                                MsgKey.ER_WF_INVALID_CHARACTER,
+                                null,
+                                null,
+                                null));
+                    }
+                }
+            }
+        } // version of the document is XML 1.0
+        else {
+            // we need to check all chracters as per production rules of XML 1.0
+            int i = 0;
+            while (i < datalength) {
+                char c = dataarray[i++];
+                if (XMLChar.isInvalid(c)) {
+                    // check if this is a supplemental character
+                    if (XMLChar.isHighSurrogate(c) && i < datalength) {
+                        char c2 = dataarray[i++];
+                        if (XMLChar.isLowSurrogate(c2)
+                            && XMLChar.isSupplemental(
+                                XMLChar.supplemental(c, c2))) {
+                            continue;
+                        }
+                    }
+                    String msg =
+                        Utils.messages.createMessage(
+                            MsgKey.ER_WF_INVALID_CHARACTER_IN_COMMENT,
+                            new Object[] { new Character(c)});
+
+                    if (fErrorHandler != null) {
+                        fErrorHandler.handleError(
+                            new DOMErrorImpl(
+                                DOMError.SEVERITY_FATAL_ERROR,
+                                msg,
+                                MsgKey.ER_WF_INVALID_CHARACTER,
+                                null,
+                                null,
+                                null));
+                    }
+                } else if (c == '-' && i < datalength && dataarray[i] == '-') {
+                    String msg =
+                        Utils.messages.createMessage(
+                            MsgKey.ER_WF_DASH_IN_COMMENT,
+                            null);
+
+                    if (fErrorHandler != null) {
+                        fErrorHandler.handleError(
+                            new DOMErrorImpl(
+                                DOMError.SEVERITY_FATAL_ERROR,
+                                msg,
+                                MsgKey.ER_WF_INVALID_CHARACTER,
+                                null,
+                                null,
+                                null));
+                    }
+                }
+            }
+        }
+        return;
+    }
+
+    /**
+     * Checks if an element node is well-formed, by checking its Name for well-formedness.
+     * 
+     * @param data The contents of the comment node
+     * @return a boolean indiacating if the comment is well-formed or not.
+     */
+    protected void isElementWellFormed(Node node) {
+        boolean isNameWF = false;
+        if ((fFeatures & NAMESPACES) != 0) {
+            isNameWF =
+                isValidQName(
+                    node.getPrefix(),
+                    node.getLocalName(),
+                    fIsXMLVersion11);
+        } else {
+            isNameWF = isXMLName(node.getNodeName(), fIsXMLVersion11);
+        }
+
+        if (!isNameWF) {
+            String msg =
+                Utils.messages.createMessage(
+                    MsgKey.ER_WF_INVALID_CHARACTER_IN_NODE_NAME,
+                    new Object[] { "Element", node.getNodeName()});
+
+            if (fErrorHandler != null) {
+                fErrorHandler.handleError(
+                    new DOMErrorImpl(
+                        DOMError.SEVERITY_FATAL_ERROR,
+                        msg,
+                        MsgKey.ER_WF_INVALID_CHARACTER_IN_NODE_NAME,
+                        null,
+                        null,
+                        null));
+            }
+        }
+    }
+
+    /**
+     * Checks if an attr node is well-formed, by checking it's Name and value
+     * for well-formedness.
+     * 
+     * @param data The contents of the comment node
+     * @return a boolean indiacating if the comment is well-formed or not.
+     */
+    protected void isAttributeWellFormed(Node node) {
+        boolean isNameWF = false;
+        if ((fFeatures & NAMESPACES) != 0) {
+            isNameWF =
+                isValidQName(
+                    node.getPrefix(),
+                    node.getLocalName(),
+                    fIsXMLVersion11);
+        } else {
+            isNameWF = isXMLName(node.getNodeName(), fIsXMLVersion11);
+        }
+
+        if (!isNameWF) {
+            String msg =
+                Utils.messages.createMessage(
+                    MsgKey.ER_WF_INVALID_CHARACTER_IN_NODE_NAME,
+                    new Object[] { "Attr", node.getNodeName()});
+
+            if (fErrorHandler != null) {
+                fErrorHandler.handleError(
+                    new DOMErrorImpl(
+                        DOMError.SEVERITY_FATAL_ERROR,
+                        msg,
+                        MsgKey.ER_WF_INVALID_CHARACTER_IN_NODE_NAME,
+                        null,
+                        null,
+                        null));
+            }
+        }
+
+        // Check the Attr's node value
+        // WFC: No < in Attribute Values
+        String value = node.getNodeValue();
+        if (value.indexOf('<') >= 0) {
+            String msg =
+                Utils.messages.createMessage(
+                    MsgKey.ER_WF_LT_IN_ATTVAL,
+                    new Object[] {
+                        ((Attr) node).getOwnerElement().getNodeName(),
+                        node.getNodeName()});
+
+            if (fErrorHandler != null) {
+                fErrorHandler.handleError(
+                    new DOMErrorImpl(
+                        DOMError.SEVERITY_FATAL_ERROR,
+                        msg,
+                        MsgKey.ER_WF_LT_IN_ATTVAL,
+                        null,
+                        null,
+                        null));
+            }
+        }
+
+        // we need to loop through the children of attr nodes and check their values for
+        // well-formedness  
+        NodeList children = node.getChildNodes();
+        for (int i = 0; i < children.getLength(); i++) {
+            Node child = children.item(i);
+            // An attribute node with no text or entity ref child for example
+            // doc.createAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns:ns");
+            // followes by
+            // element.setAttributeNodeNS(attribute);
+            // can potentially lead to this situation.  If the attribute
+            // was a prefix Namespace attribute declaration then then DOM Core 
+            // should have some exception defined for this.
+            if (child == null) {
+                // we should probably report an error
+                continue;
+            }
+            switch (child.getNodeType()) {
+                case Node.TEXT_NODE :
+                    isTextWellFormed((Text) child);
+                    break;
+                case Node.ENTITY_REFERENCE_NODE :
+                    isEntityReferneceWellFormed((EntityReference) child);
+                    break;
+                default :
+            }
+        }
+
+        // TODO:
+        // WFC: Check if the attribute prefix is bound to 
+        // http://www.w3.org/2000/xmlns/  
+
+        // WFC: Unique Att Spec
+        // Perhaps pass a seen boolean value to this method.  serializeAttList will determine
+        // if the attr was seen before.
+    }
+
+    /**
+     * Checks if a PI node is well-formed, by checking it's Name and data
+     * for well-formedness.
+     * 
+     * @param data The contents of the comment node
+     */
+    protected void isPIWellFormed(ProcessingInstruction node) {
+        // Is the PI Target a valid XML name
+        if (!isXMLName(node.getNodeName(), fIsXMLVersion11)) {
+            String msg =
+                Utils.messages.createMessage(
+                    MsgKey.ER_WF_INVALID_CHARACTER_IN_NODE_NAME,
+                    new Object[] { "ProcessingInstruction", node.getTarget()});
+
+            if (fErrorHandler != null) {
+                fErrorHandler.handleError(
+                    new DOMErrorImpl(
+                        DOMError.SEVERITY_FATAL_ERROR,
+                        msg,
+                        MsgKey.ER_WF_INVALID_CHARACTER_IN_NODE_NAME,
+                        null,
+                        null,
+                        null));
+            }
+        }
+
+        // Does the PI Data carry valid XML characters
+
+        // REVISIT: Should we check if the PI DATA contains a ?> ???
+        Character invalidChar = isWFXMLChar(node.getData());
+        if (invalidChar != null) {
+            String msg =
+                Utils.messages.createMessage(
+                    MsgKey.ER_WF_INVALID_CHARACTER_IN_PI,
+                    new Object[] { Integer.toHexString(Character.getNumericValue(invalidChar.charValue())) });
+
+            if (fErrorHandler != null) {
+                fErrorHandler.handleError(
+                    new DOMErrorImpl(
+                        DOMError.SEVERITY_FATAL_ERROR,
+                        msg,
+                        MsgKey.ER_WF_INVALID_CHARACTER,
+                        null,
+                        null,
+                        null));
+            }
+        }
+    }
+
+    /**
+     * Checks if an CDATASection node is well-formed, by checking it's data
+     * for well-formedness.  Note that the presence of a CDATA termination mark
+     * in the contents of a CDATASection is handled by the parameter 
+     * spli-cdata-sections
+     * 
+     * @param data The contents of the comment node
+     */
+    protected void isCDATASectionWellFormed(CDATASection node) {
+        // Does the data valid XML character data        
+        Character invalidChar = isWFXMLChar(node.getData());
+        //if (!isWFXMLChar(node.getData(), invalidChar)) {
+        if (invalidChar != null) {
+            String msg =
+                Utils.messages.createMessage(
+                    MsgKey.ER_WF_INVALID_CHARACTER_IN_CDATA,
+                    new Object[] { Integer.toHexString(Character.getNumericValue(invalidChar.charValue())) });
+
+            if (fErrorHandler != null) {
+                fErrorHandler.handleError(
+                    new DOMErrorImpl(
+                        DOMError.SEVERITY_FATAL_ERROR,
+                        msg,
+                        MsgKey.ER_WF_INVALID_CHARACTER,
+                        null,
+                        null,
+                        null));
+            }
+        }
+    }
+
+    /**
+     * Checks if an Text node is well-formed, by checking if it contains invalid
+     * XML characters.
+     * 
+     * @param data The contents of the comment node
+     */
+    protected void isTextWellFormed(Text node) {
+        // Does the data valid XML character data        
+    	Character invalidChar = isWFXMLChar(node.getData());
+    	if (invalidChar != null) {
+            String msg =
+                Utils.messages.createMessage(
+                    MsgKey.ER_WF_INVALID_CHARACTER_IN_TEXT,
+                    new Object[] { Integer.toHexString(Character.getNumericValue(invalidChar.charValue())) });
+
+            if (fErrorHandler != null) {
+                fErrorHandler.handleError(
+                    new DOMErrorImpl(
+                        DOMError.SEVERITY_FATAL_ERROR,
+                        msg,
+                        MsgKey.ER_WF_INVALID_CHARACTER,
+                        null,
+                        null,
+                        null));
+            }
+        }
+    }
+
+    /**
+     * Checks if an EntityRefernece node is well-formed, by checking it's node name.  Then depending
+     * on whether it is referenced in Element content or in an Attr Node, checks if the EntityReference
+     * references an unparsed entity or a external entity and if so throws raises the 
+     * appropriate well-formedness error.  
+     * 
+     * @param data The contents of the comment node
+     * @parent The parent of the EntityReference Node
+     */
+    protected void isEntityReferneceWellFormed(EntityReference node) {
+        // Is the EntityReference name a valid XML name
+        if (!isXMLName(node.getNodeName(), fIsXMLVersion11)) {
+            String msg =
+                Utils.messages.createMessage(
+                    MsgKey.ER_WF_INVALID_CHARACTER_IN_NODE_NAME,
+                    new Object[] { "EntityReference", node.getNodeName()});
+
+            if (fErrorHandler != null) {
+                fErrorHandler.handleError(
+                    new DOMErrorImpl(
+                        DOMError.SEVERITY_FATAL_ERROR,
+                        msg,
+                        MsgKey.ER_WF_INVALID_CHARACTER_IN_NODE_NAME,
+                        null,
+                        null,
+                        null));
+            }
+        }
+
+        // determine the parent node
+        Node parent = node.getParentNode();
+
+        // Traverse the declared entities and check if the nodeName and namespaceURI
+        // of the EntityReference matches an Entity.  If so, check the if the notationName
+        // is not null, if so, report an error.
+        DocumentType docType = node.getOwnerDocument().getDoctype();
+        if (docType != null) {
+            NamedNodeMap entities = docType.getEntities();
+            for (int i = 0; i < entities.getLength(); i++) {
+                Entity ent = (Entity) entities.item(i);
+
+                String nodeName =
+                    node.getNodeName() == null ? "" : node.getNodeName();
+                String nodeNamespaceURI =
+                    node.getNamespaceURI() == null
+                        ? ""
+                        : node.getNamespaceURI();
+                String entName =
+                    ent.getNodeName() == null ? "" : ent.getNodeName();
+                String entNamespaceURI =
+                    ent.getNamespaceURI() == null ? "" : ent.getNamespaceURI();
+                // If referenced in Element content
+                // WFC: Parsed Entity
+                if (parent.getNodeType() == Node.ELEMENT_NODE) {
+                    if (entNamespaceURI.equals(nodeNamespaceURI)
+                        && entName.equals(nodeName)) {
+
+                        if (ent.getNotationName() != null) {
+                            String msg =
+                                Utils.messages.createMessage(
+                                    MsgKey.ER_WF_REF_TO_UNPARSED_ENT,
+                                    new Object[] { node.getNodeName()});
+
+                            if (fErrorHandler != null) {
+                                fErrorHandler.handleError(
+                                    new DOMErrorImpl(
+                                        DOMError.SEVERITY_FATAL_ERROR,
+                                        msg,
+                                        MsgKey.ER_WF_REF_TO_UNPARSED_ENT,
+                                        null,
+                                        null,
+                                        null));
+                            }
+                        }
+                    }
+                } // end if WFC: Parsed Entity
+
+                // If referenced in an Attr value
+                // WFC: No External Entity References
+                if (parent.getNodeType() == Node.ATTRIBUTE_NODE) {
+                    if (entNamespaceURI.equals(nodeNamespaceURI)
+                        && entName.equals(nodeName)) {
+
+                        if (ent.getPublicId() != null
+                            || ent.getSystemId() != null
+                            || ent.getNotationName() != null) {
+                            String msg =
+                                Utils.messages.createMessage(
+                                    MsgKey.ER_WF_REF_TO_EXTERNAL_ENT,
+                                    new Object[] { node.getNodeName()});
+
+                            if (fErrorHandler != null) {
+                                fErrorHandler.handleError(
+                                    new DOMErrorImpl(
+                                        DOMError.SEVERITY_FATAL_ERROR,
+                                        msg,
+                                        MsgKey.ER_WF_REF_TO_EXTERNAL_ENT,
+                                        null,
+                                        null,
+                                        null));
+                            }
+                        }
+                    }
+                } //end if WFC: No External Entity References
+            }
+        }
+    } // isEntityReferneceWellFormed    
+
+    /**
+     * If the configuration parameter "namespaces" is set to true, this methods
+     * checks if an entity whose replacement text contains unbound namespace 
+     * prefixes is referenced in a location where there are no bindings for 
+     * the namespace prefixes and if so raises a LSException with the error-type
+     * "unbound-prefix-in-entity-reference"   
+     * 
+     * @param Node, The EntityReference nodes whose children are to be checked
+     */
+    protected void checkUnboundPrefixInEntRef(Node node) {
+        Node child, next;
+        for (child = node.getFirstChild(); child != null; child = next) {
+            next = child.getNextSibling();
+
+            if (child.getNodeType() == Node.ELEMENT_NODE) {
+
+                //If a NamespaceURI is not declared for the current
+                //node's prefix, raise a fatal error.
+                String prefix = child.getPrefix();
+                if (prefix != null
+                		&& fNSBinder.getURI(prefix) == null) {
+                    String msg =
+                        Utils.messages.createMessage(
+                            MsgKey.ER_ELEM_UNBOUND_PREFIX_IN_ENTREF,
+                            new Object[] {
+                                node.getNodeName(),
+                                child.getNodeName(),
+                                prefix });
+
+                    if (fErrorHandler != null) {
+                        fErrorHandler.handleError(
+                            new DOMErrorImpl(
+                                DOMError.SEVERITY_FATAL_ERROR,
+                                msg,
+                                MsgKey.ER_ELEM_UNBOUND_PREFIX_IN_ENTREF,
+                                null,
+                                null,
+                                null));
+                    }
+                }
+
+                NamedNodeMap attrs = child.getAttributes();
+
+                for (int i = 0; i < attrs.getLength(); i++) {
+                    String attrPrefix = attrs.item(i).getPrefix();
+                    if (attrPrefix != null
+                    		&& fNSBinder.getURI(attrPrefix) == null) {
+                        String msg =
+                            Utils.messages.createMessage(
+                                MsgKey.ER_ATTR_UNBOUND_PREFIX_IN_ENTREF,
+                                new Object[] {
+                                    node.getNodeName(),
+                                    child.getNodeName(),
+                                    attrs.item(i)});
+
+                        if (fErrorHandler != null) {
+                            fErrorHandler.handleError(
+                                new DOMErrorImpl(
+                                    DOMError.SEVERITY_FATAL_ERROR,
+                                    msg,
+                                    MsgKey.ER_ATTR_UNBOUND_PREFIX_IN_ENTREF,
+                                    null,
+                                    null,
+                                    null));
+                        }
+                    }
+                }
+            }
+
+            if (child.hasChildNodes()) {
+                checkUnboundPrefixInEntRef(child);
+            }
+        }
+    }
+
+    // ***********************************************************************
+    // Namespace normalization
+    // ***********************************************************************
+    /**
+     * Records local namespace declarations, to be used for normalization later
+     * 
+     * @param Node, The element node, whose namespace declarations are to be recorded
+     */
+    protected void recordLocalNSDecl(Node node) {
+        NamedNodeMap atts = ((Element) node).getAttributes();
+        int length = atts.getLength();
+
+        for (int i = 0; i < length; i++) {
+            Node attr = atts.item(i);
+
+            String localName = attr.getLocalName();
+            String attrPrefix = attr.getPrefix();
+            String attrValue = attr.getNodeValue();
+            String attrNS = attr.getNamespaceURI();
+
+            localName =
+                localName == null
+                    || XMLNS_PREFIX.equals(localName) ? "" : localName;
+            attrPrefix = attrPrefix == null ? "" : attrPrefix;
+            attrValue = attrValue == null ? "" : attrValue;
+            attrNS = attrNS == null ? "" : attrNS;
+
+            // check if attribute is a namespace decl
+            if (XMLNS_URI.equals(attrNS)) {
+
+                // No prefix may be bound to http://www.w3.org/2000/xmlns/.
+                if (XMLNS_URI.equals(attrValue)) {
+                    String msg =
+                        Utils.messages.createMessage(
+                            MsgKey.ER_NS_PREFIX_CANNOT_BE_BOUND,
+                            new Object[] { attrPrefix, XMLNS_URI });
+
+                    if (fErrorHandler != null) {
+                        fErrorHandler.handleError(
+                            new DOMErrorImpl(
+                                DOMError.SEVERITY_ERROR,
+                                msg,
+                                MsgKey.ER_NS_PREFIX_CANNOT_BE_BOUND,
+                                null,
+                                null,
+                                null));
+                    }
+                } else {
+                    // store the namespace-declaration
+                	if (XMLNS_PREFIX.equals(attrPrefix) ) {
+                        // record valid decl
+                        if (attrValue.length() != 0) {
+                            fNSBinder.declarePrefix(localName, attrValue);
+                        } else {
+                            // Error; xmlns:prefix=""
+                        }
+                    } else { // xmlns
+                        // empty prefix is always bound ("" or some string)
+                        fNSBinder.declarePrefix("", attrValue);
+                    }
+                }
+                
+            }
+        }
+    }
+
+    /**
+     * Fixes an element's namespace
+     * 
+     * @param Node, The element node, whose namespace is to be fixed
+     */
+    protected void fixupElementNS(Node node) throws SAXException {
+        String namespaceURI = ((Element) node).getNamespaceURI();
+        String prefix = ((Element) node).getPrefix();
+        String localName = ((Element) node).getLocalName();
+
+        if (namespaceURI != null) {
+            //if ( Element's prefix/namespace pair (or default namespace,
+            // if no prefix) are within the scope of a binding )
+            prefix = prefix == null ? "" : prefix;
+            String inScopeNamespaceURI = fNSBinder.getURI(prefix);
+
+            if ((inScopeNamespaceURI != null
+                && inScopeNamespaceURI.equals(namespaceURI))) {
+                // do nothing, declaration in scope is inherited
+                
+            } else {
+                // Create a local namespace declaration attr for this namespace,
+                // with Element's current prefix (or a default namespace, if
+                // no prefix). If there's a conflicting local declaration
+                // already present, change its value to use this namespace.
+                
+                // Add the xmlns declaration attribute
+            	//fNSBinder.pushNamespace(prefix, namespaceURI, fElementDepth);
+                if ((fFeatures & NAMESPACEDECLS) != 0) {
+                    if ("".equals(prefix) || "".equals(namespaceURI)) {
+                    	((Element)node).setAttributeNS(XMLNS_URI, XMLNS_PREFIX, namespaceURI);
+                    } else {
+                    	((Element)node).setAttributeNS(XMLNS_URI, XMLNS_PREFIX + ":" + prefix, namespaceURI);
+                    }
+                }
+                fLocalNSBinder.declarePrefix(prefix, namespaceURI);
+                fNSBinder.declarePrefix(prefix, namespaceURI);
+
+            } 
+        } else {
+            // Element has no namespace
+            // DOM Level 1
+            if (localName == null || "".equals(localName)) {
+                //  DOM Level 1 node!
+                String msg =
+                    Utils.messages.createMessage(
+                        MsgKey.ER_NULL_LOCAL_ELEMENT_NAME,
+                        new Object[] { node.getNodeName()});
+
+                if (fErrorHandler != null) {
+                    fErrorHandler.handleError(
+                        new DOMErrorImpl(
+                            DOMError.SEVERITY_ERROR,
+                            msg,
+                            MsgKey.ER_NULL_LOCAL_ELEMENT_NAME,
+                            null,
+                            null,
+                            null));
+                }
+            } else {
+            	namespaceURI = fNSBinder.getURI("");
+            	if (namespaceURI !=null && namespaceURI.length() > 0) {
+            	    ((Element)node).setAttributeNS(XMLNS_URI, XMLNS_PREFIX, "");
+            		fLocalNSBinder.declarePrefix("", "");
+                    fNSBinder.declarePrefix("", "");
+            	}
+            }
+        }
+    }
+    /** 
+     * This table is a quick lookup of a property key (String) to the integer that
+     * is the bit to flip in the fFeatures field, so the integers should have
+     * values 1,2,4,8,16...
+     * 
+     */
+    private static final Hashtable s_propKeys = new Hashtable();
+    static {
+
+        // Initialize the mappings of property keys to bit values (Integer objects)
+        // or mappings to a String object "", which indicates we are interested
+        // in the property, but it does not have a simple bit value to flip
+
+        // cdata-sections
+        int i = CDATA;
+        Integer val = new Integer(i);
+        s_propKeys.put(
+            DOMConstants.S_DOM3_PROPERTIES_NS + DOMConstants.DOM_CDATA_SECTIONS,
+            val);
+
+        // comments
+        int i1 = COMMENTS;
+        val = new Integer(i1);
+        s_propKeys.put(
+            DOMConstants.S_DOM3_PROPERTIES_NS + DOMConstants.DOM_COMMENTS,
+            val);
+
+        // element-content-whitespace
+        int i2 = ELEM_CONTENT_WHITESPACE;
+        val = new Integer(i2);
+        s_propKeys.put(
+            DOMConstants.S_DOM3_PROPERTIES_NS
+                + DOMConstants.DOM_ELEMENT_CONTENT_WHITESPACE,
+            val);
+        int i3 = ENTITIES;
+
+        // entities
+        val = new Integer(i3);
+        s_propKeys.put(
+            DOMConstants.S_DOM3_PROPERTIES_NS + DOMConstants.DOM_ENTITIES,
+            val);
+
+        // namespaces
+        int i4 = NAMESPACES;
+        val = new Integer(i4);
+        s_propKeys.put(
+            DOMConstants.S_DOM3_PROPERTIES_NS + DOMConstants.DOM_NAMESPACES,
+            val);
+
+        // namespace-declarations
+        int i5 = NAMESPACEDECLS;
+        val = new Integer(i5);
+        s_propKeys.put(
+            DOMConstants.S_DOM3_PROPERTIES_NS
+                + DOMConstants.DOM_NAMESPACE_DECLARATIONS,
+            val);
+
+        // split-cdata-sections
+        int i6 = SPLITCDATA;
+        val = new Integer(i6);
+        s_propKeys.put(
+            DOMConstants.S_DOM3_PROPERTIES_NS + DOMConstants.DOM_SPLIT_CDATA,
+            val);
+
+        // discard-default-content	
+        int i7 = WELLFORMED;
+        val = new Integer(i7);
+        s_propKeys.put(
+            DOMConstants.S_DOM3_PROPERTIES_NS + DOMConstants.DOM_WELLFORMED,
+            val);
+
+        // discard-default-content	
+        int i8 = DISCARDDEFAULT;
+        val = new Integer(i8);
+        s_propKeys.put(
+            DOMConstants.S_DOM3_PROPERTIES_NS
+                + DOMConstants.DOM_DISCARD_DEFAULT_CONTENT,
+            val);
+
+        // We are interested in these properties, but they don't have a simple
+        // bit value to deal with.
+        s_propKeys.put(
+            DOMConstants.S_DOM3_PROPERTIES_NS
+                + DOMConstants.DOM_FORMAT_PRETTY_PRINT,
+            "");
+        s_propKeys.put(DOMConstants.S_XSL_OUTPUT_OMIT_XML_DECL, "");
+        s_propKeys.put(
+            DOMConstants.S_XERCES_PROPERTIES_NS + DOMConstants.S_XML_VERSION,
+            "");
+        s_propKeys.put(DOMConstants.S_XSL_OUTPUT_ENCODING, "");
+        s_propKeys.put(OutputPropertiesFactory.S_KEY_ENTITIES, "");
+    }
+
+    /**
+     * Initializes fFeatures based on the DOMConfiguration Parameters set.
+     *
+     * @param properties DOMConfiguraiton properties that were set and which are
+     * to be used while serializing the DOM. 
+     */
+    protected void initProperties(Properties properties) {
+
+        for (Enumeration keys = properties.keys(); keys.hasMoreElements();) {
+
+            final String key = (String) keys.nextElement();
+    
+            // caonical-form
+            // Other features will be enabled or disabled when this is set to true or false.
+
+            // error-handler; set via the constructor
+
+            // infoset
+            // Other features will be enabled or disabled when this is set to true
+
+            // A quick lookup for the given set of properties (cdata-sections ...)
+            final Object iobj = s_propKeys.get(key);
+            if (iobj != null) {
+                if (iobj instanceof Integer) {
+                    // Dealing with a property that has a simple bit value that
+                    // we need to set
+
+                    // cdata-sections			
+                    // comments
+                    // element-content-whitespace
+                    // entities
+                    // namespaces
+                    // namespace-declarations
+                    // split-cdata-sections
+                    // well-formed
+                    // discard-default-content
+                    final int BITFLAG = ((Integer) iobj).intValue();
+                    if ((properties.getProperty(key).endsWith("yes"))) {
+                        fFeatures = fFeatures | BITFLAG;
+                    } else {
+                        fFeatures = fFeatures & ~BITFLAG;
+                    }
+                } else {
+                    // We are interested in the property, but it is not
+                    // a simple bit that we need to set.
+
+                    if ((DOMConstants.S_DOM3_PROPERTIES_NS
+                        + DOMConstants.DOM_FORMAT_PRETTY_PRINT)
+                        .equals(key)) {
+                        // format-pretty-print; set internally on the serializers via xsl:output properties in LSSerializer
+                        if ((properties.getProperty(key).endsWith("yes"))) {
+                            fSerializer.setIndent(true);
+                            fSerializer.setIndentAmount(3);
+                        } else {
+                            fSerializer.setIndent(false);
+                        }
+                    } else if (
+                        (DOMConstants.S_XSL_OUTPUT_OMIT_XML_DECL).equals(
+                            key)) {
+                        // omit-xml-declaration; set internally on the serializers via xsl:output properties in LSSerializer
+                        if ((properties.getProperty(key).endsWith("yes"))) {
+                            fSerializer.setOmitXMLDeclaration(true);
+                        } else {
+                            fSerializer.setOmitXMLDeclaration(false);
+                        }
+                    } else if (
+                        (
+                            DOMConstants.S_XERCES_PROPERTIES_NS
+                                + DOMConstants.S_XML_VERSION).equals(
+                            key)) {
+                        // Retreive the value of the XML Version attribute via the xml-version
+                        String version = properties.getProperty(key);
+                        if ("1.1".equals(version)) {
+                            fIsXMLVersion11 = true;
+                            fSerializer.setVersion(version);
+                        } else {
+                            fSerializer.setVersion("1.0");
+                        }
+                    } else if (
+                        (DOMConstants.S_XSL_OUTPUT_ENCODING).equals(key)) {
+                        // Retreive the value of the XML Encoding attribute
+                        String encoding = properties.getProperty(key);
+                        if (encoding != null) {
+                            fSerializer.setEncoding(encoding);
+                        }
+                    } else if ((OutputPropertiesFactory.S_KEY_ENTITIES).equals(key)) {
+                        // Retreive the value of the XML Encoding attribute
+                        String entities = properties.getProperty(key);
+                        if (DOMConstants.S_XSL_VALUE_ENTITIES.equals(entities)) {
+                            fSerializer.setDTDEntityExpansion(false);
+                        }
+                    } else {
+                        // We shouldn't get here, ever, now what?
+                    }
+                }
+            }
+        }
+        // Set the newLine character to use
+        if (fNewLine != null) {
+            fSerializer.setOutputProperty(OutputPropertiesFactory.S_KEY_LINE_SEPARATOR,
+                    fNewLine.toString());
+        }
+    }
+
+} //TreeWalker



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