v2/src/common/org/apache/xmlbeans/impl/common/Sax2Dom.java - xmlbeans - Git at Google

 /*
  * The Apache Software License, Version 1.1
  *
  *
  * Copyright (c) 2001-2003 The Apache Software Foundation.  All rights
  * reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in
  *    the documentation and/or other materials provided with the
  *    distribution.
  *
  * 3. The end-user documentation included with the redistribution,
  *    if any, must include the following acknowledgment:
  *       "This product includes software developed by the
  *        Apache Software Foundation (http://www.apache.org/)."
  *    Alternately, this acknowledgment may appear in the software itself,
  *    if and wherever such third-party acknowledgments normally appear.
  *
  * 4. The names "Xalan" and "Apache Software Foundation" must
  *    not be used to endorse or promote products derived from this
  *    software without prior written permission. For written
  *    permission, please contact apache@apache.org.
  *
  * 5. Products derived from this software may not be called "Apache",
  *    nor may "Apache" appear in their name, without prior written
  *    permission of the Apache Software Foundation.
  *
  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  * ====================================================================
  *
  * This software consists of voluntary contributions made by many
  * individuals on behalf of the Apache Software Foundation and was
  * originally based on software copyright (c) 2001, Sun
  * Microsystems., http://www.sun.com.  For more
  * information on the Apache Software Foundation, please see
  * <http://www.apache.org/>.
  *
  * @author G. Todd Miller
  */

 package org.apache.xmlbeans.impl.common;

 import org.w3c.dom.Node;
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
 import org.w3c.dom.ProcessingInstruction;
 import org.w3c.dom.Comment;
 import org.xml.sax.Attributes;
 import org.xml.sax.Locator;
 import org.xml.sax.SAXException;
 import org.xml.sax.ContentHandler;
 import org.xml.sax.helpers.DefaultHandler;
 import org.xml.sax.ext.LexicalHandler;

 import javax.xml.parsers.ParserConfigurationException;
 import javax.xml.parsers.DocumentBuilderFactory;
 import java.util.Stack;
 import java.util.Vector;

 public class Sax2Dom
         extends DefaultHandler
         implements ContentHandler, LexicalHandler
 {
     public static final String EMPTYSTRING = "";
     public static final String XML_PREFIX = "xml";
     public static final String XMLNS_PREFIX = "xmlns";
     public static final String XMLNS_STRING = "xmlns:";
     public static final String XMLNS_URI = "http://www.w3.org/2000/xmlns/";

     private Node _root = null;
     private Document _document = null;
     private Stack _nodeStk = new Stack();
     private Vector _namespaceDecls = null;

     public Sax2Dom() throws ParserConfigurationException
     {
         final DocumentBuilderFactory factory =
                 DocumentBuilderFactory.newInstance();
         _document = factory.newDocumentBuilder().newDocument();
         _root = _document;
     }

     public Sax2Dom(Node root) throws ParserConfigurationException
     {
         _root = root;
         if (root instanceof Document)
         {
             _document = (Document) root;
         }
         else if (root != null)
         {
             _document = root.getOwnerDocument();
         }
         else
         {
             final DocumentBuilderFactory factory =
                     DocumentBuilderFactory.newInstance();
             _document = factory.newDocumentBuilder().newDocument();
             _root = _document;
         }
     }

     public Node getDOM()
     {
         return _root;
     }

     public void characters(char[] ch, int start, int length)
     {
         final Node last = (Node) _nodeStk.peek();

         // No text nodes can be children of root (DOM006 exception)
         if (last != _document)
         {
             final String text = new String(ch, start, length);
             last.appendChild(_document.createTextNode(text));
         }
     }

     public void startDocument()
     {
         _nodeStk.push(_root);
     }

     public void endDocument()
     {
         _nodeStk.pop();
     }

     public void startElement(String namespace, String localName, String qName,
                              Attributes attrs)
     {
         final Element tmp = (Element) _document.createElementNS(namespace, qName);

         // Add namespace declarations first
         if (_namespaceDecls != null)
         {
             final int nDecls = _namespaceDecls.size();
             for (int i = 0; i < nDecls; i++)
             {
                 final String prefix = (String) _namespaceDecls.elementAt(i++);

                 if (prefix == null || prefix.equals(EMPTYSTRING))
                 {
                     tmp.setAttributeNS(XMLNS_URI, XMLNS_PREFIX,
                             (String) _namespaceDecls.elementAt(i));
                 }
                 else
                 {
                     tmp.setAttributeNS(XMLNS_URI, XMLNS_STRING + prefix,
                             (String) _namespaceDecls.elementAt(i));
                 }
             }
             _namespaceDecls.clear();
         }

         // Add attributes to element
         final int nattrs = attrs.getLength();
         for (int i = 0; i < nattrs; i++)
         {
             if (attrs.getLocalName(i) == null)
             {
                 tmp.setAttribute(attrs.getQName(i), attrs.getValue(i));
             }
             else
             {
                 tmp.setAttributeNS(attrs.getURI(i), attrs.getQName(i),
                         attrs.getValue(i));
             }
         }

         // Append this new node onto current stack node
         Node last = (Node) _nodeStk.peek();
         last.appendChild(tmp);

         // Push this node onto stack
         _nodeStk.push(tmp);
     }

     public void endElement(String namespace, String localName, String qName)
     {
         _nodeStk.pop();
     }

     public void startPrefixMapping(String prefix, String uri)
     {
         if (_namespaceDecls == null)
         {
             _namespaceDecls = new Vector(2);
         }
         _namespaceDecls.addElement(prefix);
         _namespaceDecls.addElement(uri);
     }

     public void endPrefixMapping(String prefix)
     {
         // do nothing
     }

     /**
      * This class is only used internally so this method should never
      * be called.
      */
     public void ignorableWhitespace(char[] ch, int start, int length)
     {
     }

     /**
      * adds processing instruction node to DOM.
      */
     public void processingInstruction(String target, String data)
     {
         final Node last = (Node) _nodeStk.peek();
         ProcessingInstruction pi = _document.createProcessingInstruction(
                 target, data);
         if (pi != null) last.appendChild(pi);
     }

     /**
      * This class is only used internally so this method should never
      * be called.
      */
     public void setDocumentLocator(Locator locator)
     {
     }

     /**
      * This class is only used internally so this method should never
      * be called.
      */
     public void skippedEntity(String name)
     {
     }


     /**
      * Lexical Handler method to create comment node in DOM tree.
      */
     public void comment(char[] ch, int start, int length)
     {
         final Node last = (Node) _nodeStk.peek();
         Comment comment = _document.createComment(new String(ch, start, length));
         if (comment != null) last.appendChild(comment);
     }

     // Lexical Handler methods- not implemented
     public void startCDATA()
     {
     }

     public void endCDATA()
     {
     }

     public void startEntity(java.lang.String name)
     {
     }

     public void endEntity(String name)
     {
     }

     public void startDTD(String name, String publicId, String systemId)
             throws SAXException
     {
     }

     public void endDTD()
     {
     }
 }
	/*
	* The Apache Software License, Version 1.1
	*
	*
	* Copyright (c) 2001-2003 The Apache Software Foundation. All rights
	* reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	*
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	*
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in
	* the documentation and/or other materials provided with the
	* distribution.
	*
	* 3. The end-user documentation included with the redistribution,
	* if any, must include the following acknowledgment:
	* "This product includes software developed by the
	* Apache Software Foundation (http://www.apache.org/)."
	* Alternately, this acknowledgment may appear in the software itself,
	* if and wherever such third-party acknowledgments normally appear.
	*
	* 4. The names "Xalan" and "Apache Software Foundation" must
	* not be used to endorse or promote products derived from this
	* software without prior written permission. For written
	* permission, please contact apache@apache.org.
	*
	* 5. Products derived from this software may not be called "Apache",
	* nor may "Apache" appear in their name, without prior written
	* permission of the Apache Software Foundation.
	*
	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
	* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
	* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
	* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	* SUCH DAMAGE.
	* ====================================================================
	*
	* This software consists of voluntary contributions made by many
	* individuals on behalf of the Apache Software Foundation and was
	* originally based on software copyright (c) 2001, Sun
	* Microsystems., http://www.sun.com. For more
	* information on the Apache Software Foundation, please see
	* <http://www.apache.org/>.
	*
	* @author G. Todd Miller
	*/

	package org.apache.xmlbeans.impl.common;

	import org.w3c.dom.Node;
	import org.w3c.dom.Document;
	import org.w3c.dom.Element;
	import org.w3c.dom.ProcessingInstruction;
	import org.w3c.dom.Comment;
	import org.xml.sax.Attributes;
	import org.xml.sax.Locator;
	import org.xml.sax.SAXException;
	import org.xml.sax.ContentHandler;
	import org.xml.sax.helpers.DefaultHandler;
	import org.xml.sax.ext.LexicalHandler;

	import javax.xml.parsers.ParserConfigurationException;
	import javax.xml.parsers.DocumentBuilderFactory;
	import java.util.Stack;
	import java.util.Vector;

	public class Sax2Dom
	extends DefaultHandler
	implements ContentHandler, LexicalHandler
	{
	public static final String EMPTYSTRING = "";
	public static final String XML_PREFIX = "xml";
	public static final String XMLNS_PREFIX = "xmlns";
	public static final String XMLNS_STRING = "xmlns:";
	public static final String XMLNS_URI = "http://www.w3.org/2000/xmlns/";

	private Node _root = null;
	private Document _document = null;
	private Stack _nodeStk = new Stack();
	private Vector _namespaceDecls = null;

	public Sax2Dom() throws ParserConfigurationException
	{
	final DocumentBuilderFactory factory =
	DocumentBuilderFactory.newInstance();
	_document = factory.newDocumentBuilder().newDocument();
	_root = _document;
	}

	public Sax2Dom(Node root) throws ParserConfigurationException
	{
	_root = root;
	if (root instanceof Document)
	{
	_document = (Document) root;
	}
	else if (root != null)
	{
	_document = root.getOwnerDocument();
	}
	else
	{
	final DocumentBuilderFactory factory =
	DocumentBuilderFactory.newInstance();
	_document = factory.newDocumentBuilder().newDocument();
	_root = _document;
	}
	}

	public Node getDOM()
	{
	return _root;
	}

	public void characters(char[] ch, int start, int length)
	{
	final Node last = (Node) _nodeStk.peek();

	// No text nodes can be children of root (DOM006 exception)
	if (last != _document)
	{
	final String text = new String(ch, start, length);
	last.appendChild(_document.createTextNode(text));
	}
	}

	public void startDocument()
	{
	_nodeStk.push(_root);
	}

	public void endDocument()
	{
	_nodeStk.pop();
	}

	public void startElement(String namespace, String localName, String qName,
	Attributes attrs)
	{
	final Element tmp = (Element) _document.createElementNS(namespace, qName);

	// Add namespace declarations first
	if (_namespaceDecls != null)
	{
	final int nDecls = _namespaceDecls.size();
	for (int i = 0; i < nDecls; i++)
	{
	final String prefix = (String) _namespaceDecls.elementAt(i++);

	if (prefix == null \|\| prefix.equals(EMPTYSTRING))
	{
	tmp.setAttributeNS(XMLNS_URI, XMLNS_PREFIX,
	(String) _namespaceDecls.elementAt(i));
	}
	else
	{
	tmp.setAttributeNS(XMLNS_URI, XMLNS_STRING + prefix,
	(String) _namespaceDecls.elementAt(i));
	}
	}
	_namespaceDecls.clear();
	}

	// Add attributes to element
	final int nattrs = attrs.getLength();
	for (int i = 0; i < nattrs; i++)
	{
	if (attrs.getLocalName(i) == null)
	{
	tmp.setAttribute(attrs.getQName(i), attrs.getValue(i));
	}
	else
	{
	tmp.setAttributeNS(attrs.getURI(i), attrs.getQName(i),
	attrs.getValue(i));
	}
	}

	// Append this new node onto current stack node
	Node last = (Node) _nodeStk.peek();
	last.appendChild(tmp);

	// Push this node onto stack
	_nodeStk.push(tmp);
	}

	public void endElement(String namespace, String localName, String qName)
	{
	_nodeStk.pop();
	}

	public void startPrefixMapping(String prefix, String uri)
	{
	if (_namespaceDecls == null)
	{
	_namespaceDecls = new Vector(2);
	}
	_namespaceDecls.addElement(prefix);
	_namespaceDecls.addElement(uri);
	}

	public void endPrefixMapping(String prefix)
	{
	// do nothing
	}

	/**
	* This class is only used internally so this method should never
	* be called.
	*/
	public void ignorableWhitespace(char[] ch, int start, int length)
	{
	}

	/**
	* adds processing instruction node to DOM.
	*/
	public void processingInstruction(String target, String data)
	{
	final Node last = (Node) _nodeStk.peek();
	ProcessingInstruction pi = _document.createProcessingInstruction(
	target, data);
	if (pi != null) last.appendChild(pi);
	}

	/**
	* This class is only used internally so this method should never
	* be called.
	*/
	public void setDocumentLocator(Locator locator)
	{
	}

	/**
	* This class is only used internally so this method should never
	* be called.
	*/
	public void skippedEntity(String name)
	{
	}


	/**
	* Lexical Handler method to create comment node in DOM tree.
	*/
	public void comment(char[] ch, int start, int length)
	{
	final Node last = (Node) _nodeStk.peek();
	Comment comment = _document.createComment(new String(ch, start, length));
	if (comment != null) last.appendChild(comment);
	}

	// Lexical Handler methods- not implemented
	public void startCDATA()
	{
	}

	public void endCDATA()
	{
	}

	public void startEntity(java.lang.String name)
	{
	}

	public void endEntity(String name)
	{
	}

	public void startDTD(String name, String publicId, String systemId)
	throws SAXException
	{
	}

	public void endDTD()
	{
	}
	}