/*
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*
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* 2. Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and the
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* please contact info@exolab.org.
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* 4. Products derived from this Software may not be called "Exolab"
* nor may "Exolab" appear in their names without prior written
* permission of Intalio, Inc. Exolab is a registered
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*
* 5. Due credit should be given to the Exolab Project
* (http://www.exolab.org/).
*
* THIS SOFTWARE IS PROVIDED BY INTALIO, INC. AND CONTRIBUTORS
* ``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
* INTALIO, INC. 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.
*
* Copyright 1999 (C) Intalio, Inc. All Rights Reserved.
*
* This file was adapted From XSL:P
*
* $Id$
*/
package org.exolab.castor.xml.util;
import org.exolab.castor.xml.EventProducer;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.ProcessingInstruction;
import org.w3c.dom.Text;
import org.xml.sax.AttributeList;
import org.xml.sax.DocumentHandler;
/**
* A class for converting a DOM document to SAX events
* @author <a href="mailto:kvisco@intalio.com">Keith Visco</a>
* @version $Revision$ $Date: 2003-03-03 00:05:44 -0700 (Mon, 03 Mar 2003) $
**/
public class DOMEventProducer implements EventProducer {
private DocumentHandler _handler = null;
private Node _node = null;
/**
* Creates a new DOMEventProducer
**/
public DOMEventProducer() {
super();
} //-- DOMEventProducer
/**
* Creates a new DOMEventProducer for the given Node
* @param node the node to create the DOMEventProducer for.
**/
public DOMEventProducer(Node node) {
super();
this._node = node;
} //-- DOMEventProducer
/**
* Sets the DocumentHandler to use when firing events
**/
public void setDocumentHandler(DocumentHandler handler) {
this._handler = handler;
} //-- setDocumentHandler
/**
* Sets the node which is to be converted into SAX events
* @param node the node which is to be converted into SAX events
**/
public void setNode(Node node) {
this._node = node;
} //-- setNode
/**
* Starts producing the events for the Node which is to be
* converted into SAX events
**/
public void start()
throws org.xml.sax.SAXException
{
if ((_node == null) || (_handler == null)) return;
process(_node, _handler);
} //-- start
/**
* Walks the given DOM Document and converts it into it's corresponding
* SAX events
* @param document the Node to process into SAX events
* @param handler the DocumentHandler to send events to
**/
public static void process(Document document, DocumentHandler handler)
throws org.xml.sax.SAXException
{
if (document == null) return;
if (handler == null) return;
handler.startDocument();
processChildren(document, handler);
handler.endDocument();
} //-- process(Document, DocumentHandler)
/**
* Breaks down the given node into it's corresponding SAX events
* @param node the Node to process into SAX events
* @param handler the DocumentHandler to send events to
**/
public static void process(Node node, DocumentHandler handler)
throws org.xml.sax.SAXException
{
if ((node == null) || (handler == null)) return;
switch(node.getNodeType()) {
case Node.DOCUMENT_NODE:
process((Document)node, handler);
break;
case Node.DOCUMENT_FRAGMENT_NODE:
processChildren(node, handler);
break;
case Node.ELEMENT_NODE:
process((Element)node, handler);
break;
case Node.CDATA_SECTION_NODE:
case Node.TEXT_NODE:
process((Text)node, handler);
break;
case Node.PROCESSING_INSTRUCTION_NODE:
process((ProcessingInstruction)node, handler);
break;
case Node.COMMENT_NODE:
default:
break;
}
} //-- process(Node, DocumentHandler)
//-------------------/
//- Private Methods -/
//-------------------/
/**
* Breaks down the given node into it's corresponding SAX events
* @param handler the DocumentHandler to send events to
**/
private static void process(Element element, DocumentHandler handler)
throws org.xml.sax.SAXException
{
String name = element.getNodeName();
AttributeList atts
= new AttributeListWrapper(element.getAttributes());
handler.startElement(name, atts);
processChildren(element, handler);
handler.endElement(name);
} //-- process(Element, DocumentHandler);
/**
* Breaks down the given node into it's corresponding SAX events
* @param handler the DocumentHandler to send events to
**/
private static void process(Text text, DocumentHandler handler)
throws org.xml.sax.SAXException
{
String data = text.getData();
if ((data != null) && (data.length() > 0)) {
char[] chars = data.toCharArray();
handler.characters(chars, 0, chars.length);
}
} //-- process(Text, DocumentHandler)
/**
* Breaks down the given ProcessingInstruction into it's corresponding
* SAX event
* @param pi the processing instruction to process
* @param handler the DocumentHandler to send events to
**/
private static void process
(ProcessingInstruction pi, DocumentHandler handler)
throws org.xml.sax.SAXException
{
handler.processingInstruction(pi.getTarget(),pi.getData());
} //-- process(ProcessingInstruction, DocumentHandler);
/**
* Processes the children of the given Node
* @param node the Node to process the children of
* @param handler the DocumentHandler to send events to
**/
private static void processChildren
(Node node, DocumentHandler handler)
throws org.xml.sax.SAXException
{
Node child = node.getFirstChild();
while (child != null) {
process(child, handler);
child = child.getNextSibling();
}
} //-- processChildren
} //-- DOMEventProducer