src/org/apache/xalan/xsltc/trax/DOM2SAX.java

/*
 * @(#)$Id$
 *
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 2001 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.xalan.xsltc.trax;

import org.xml.sax.XMLReader;
import org.xml.sax.ContentHandler;
import org.xml.sax.DTDHandler;
import org.xml.sax.Locator;
import org.xml.sax.ErrorHandler;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;
import org.w3c.dom.Node;
import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import java.io.IOException;
import org.w3c.dom.Entity;
import org.w3c.dom.Notation;

public class DOM2SAX implements XMLReader , Locator {
    private Document _dom = null;
    private ContentHandler _contentHdlr = null;
 
    public DOM2SAX(Node root) {
	_dom = (Document)root;
    }

    public ContentHandler getContentHandler() { 
	return _contentHdlr;
    }
    public DTDHandler getDTDHandler() { 
	return null;
    }
    public ErrorHandler getErrorHandler() {
	return null;
    }
    public boolean getFeature(String name) throws SAXNotRecognizedException,
	SAXNotSupportedException
    {
	return false;
    }
    public void setFeature(String name, boolean value) throws 
	SAXNotRecognizedException, SAXNotSupportedException 
    {
    }

    public void parse(InputSource unused) throws IOException, SAXException {
        Node currNode = _dom;
        parse(currNode);
    }

    private void parse(Node currNode) throws IOException, SAXException {
        Node first = null;
 	if (currNode == null ) return;

        switch (currNode.getNodeType()) {
            case Node.ATTRIBUTE_NODE :
                    break;
            case Node.CDATA_SECTION_NODE :
                    break;
            case Node.COMMENT_NODE :
                    break;
            case Node.DOCUMENT_FRAGMENT_NODE :
                    break;
            case Node.DOCUMENT_NODE :
                    _contentHdlr.setDocumentLocator(this);
                    _contentHdlr.startDocument();
                    Node next = currNode.getFirstChild();
                    while ( next != null ) {
                        parse(next);
                        next = next.getNextSibling();
                    }
                    _contentHdlr.endDocument();
                    break;
            case Node.DOCUMENT_TYPE_NODE :
                    break;
            case Node.ELEMENT_NODE :
                    AttributesImpl attrList = new AttributesImpl();
                    NamedNodeMap map = currNode.getAttributes();
                    int length = map.getLength();
                    for (int i=0; i<length; i++ ){
                        Node attrNode = map.item(i);
                        short code = attrNode.getNodeType();
                        attrList.addAttribute(attrNode.getNamespaceURI(),
                            attrNode.getLocalName(),
                            attrNode.getNodeName(),
                            getNodeTypeFromCode(code),  // must be better way
                            attrNode.getNodeValue());
                    }
                    _contentHdlr.startElement(currNode.getNamespaceURI(),
                        currNode.getLocalName(), currNode.getNodeName(),
                        attrList);
                    next = currNode.getFirstChild();
                    while ( next != null ) {
                        parse(next);
                        next = next.getNextSibling();
                    }
                    _contentHdlr.endElement(currNode.getNamespaceURI(),
                        currNode.getLocalName(), currNode.getNodeName());
                    break;
            case Node.ENTITY_NODE :
                    //Entity edecl = (Entity)currNode;
                    //String name = edecl.getNotationName();
                    //if ( name != null ) {
                    //   _contentHdlr.unparsedEntityDecl(currNode.getNodeName(),
                    //      edecl.getPublicId(), edecl.getSystemId(), name);
                    //}
                    break;
             case Node.ENTITY_REFERENCE_NODE :
                    break;
             case Node.NOTATION_NODE :
                    //Notation ndecl = (Notation)currNode;
                    //_contentHdlr.notationDecl(currNode.getNodeName(),
                     //   ndecl.getPublicId(), ndecl.getSystemId());
                    break;
             case Node.PROCESSING_INSTRUCTION_NODE :
                    _contentHdlr.processingInstruction(currNode.getNodeName(),
                        currNode.getNodeValue());
                    break;
             case Node.TEXT_NODE :
                    String data = currNode.getNodeValue();
                    length = data.length();
                    char[] array = new char[length];
                    data.getChars(0, length, array, 0);
                    _contentHdlr.characters(array, 0, length);
                    break;
            }
    }

    public void parse(String sysId) throws IOException, SAXException {
	throw new IOException("This method is not yet implemented.");
    }
    public void setContentHandler(ContentHandler handler) throws 
	NullPointerException 
    {
	if (handler == null ) throw new NullPointerException();
	_contentHdlr = handler;
    }
    public void setDTDHandler(DTDHandler handler) throws NullPointerException {
	if (handler == null )  throw new NullPointerException();
    }
    public void setEntityResolver(EntityResolver resolver) throws 
	NullPointerException 
    {
	if (resolver == null )  throw new NullPointerException();
    }
    public EntityResolver getEntityResolver() {
	return null;
    }
    public void setErrorHandler(ErrorHandler handler) throws 
	NullPointerException
    {
	if (handler == null )  throw new NullPointerException();
    }
    public void setProperty(String name, Object value) throws
	SAXNotRecognizedException, SAXNotSupportedException {
    }
    public Object getProperty(String name) throws SAXNotRecognizedException,
	SAXNotSupportedException
    {
	return null;
    }

    // Locator methods
    public int getColumnNumber() { return 0; }
    public int getLineNumber() { return 0; }
    public String getPublicId() { return null; }
    public String getSystemId() { return null; }


    // private 
    private String getNodeTypeFromCode(short code) {
	String retval = null;
	switch (code) {
                case Node.ATTRIBUTE_NODE : 
		    retval = "ATTRIBUTE_NODE"; break; 
                case Node.CDATA_SECTION_NODE :
		    retval = "CDATA_SECTION_NODE"; break; 
                case Node.COMMENT_NODE :
		    retval = "COMMENT_NODE"; break; 
                case Node.DOCUMENT_FRAGMENT_NODE :
		    retval = "DOCUMENT_FRAGMENT_NODE"; break; 
                case Node.DOCUMENT_NODE :
		    retval = "DOCUMENT_NODE"; break; 
                case Node.DOCUMENT_TYPE_NODE :
		    retval = "DOCUMENT_TYPE_NODE"; break; 
                case Node.ELEMENT_NODE :
		    retval = "ELEMENT_NODE"; break; 
                case Node.ENTITY_NODE :
		    retval = "ENTITY_NODE"; break; 
                case Node.ENTITY_REFERENCE_NODE :
		    retval = "ENTITY_REFERENCE_NODE"; break; 
                case Node.NOTATION_NODE :
		    retval = "NOTATION_NODE"; break; 
                case Node.PROCESSING_INSTRUCTION_NODE :
		    retval = "PROCESSING_INSTRUCTION_NODE"; break; 
                case Node.TEXT_NODE:
		    retval = "TEXT_NODE"; break; 
        }
	return retval;
    }
}