/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 1999-2003 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) 1999, Lotus
* Development Corporation., http://www.lotus.com. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.xalan.transformer;
import org.apache.xml.dtm.DTM;
import org.apache.xml.dtm.ref.DTMTreeWalker;
import org.apache.xpath.XPathContext;
/**
* <meta name="usage" content="internal"/>
* Handle a walk of a tree, but screen out attributes for
* the result tree.
*/
public class TreeWalker2Result extends DTMTreeWalker
{
/** The transformer instance */
TransformerImpl m_transformer;
/** The result tree handler */
ResultTreeHandler m_handler;
/** Node where to start the tree walk */
int m_startNode;
/**
* Constructor.
*
* @param transformer Non-null transformer instance
* @param handler The Result tree handler to use
*/
public TreeWalker2Result(TransformerImpl transformer,
ResultTreeHandler handler)
{
super(handler, null);
m_transformer = transformer;
m_handler = handler;
}
/**
* Perform a pre-order traversal non-recursive style.
*
* @param pos Start node for traversal
*
* @throws TransformerException
*/
public void traverse(int pos) throws org.xml.sax.SAXException
{
m_dtm = m_transformer.getXPathContext().getDTM(pos);
m_startNode = pos;
super.traverse(pos);
}
/**
* End processing of given node
*
*
* @param node Node we just finished processing
*
* @throws org.xml.sax.SAXException
*/
protected void endNode(int node) throws org.xml.sax.SAXException
{
super.endNode(node);
if(DTM.ELEMENT_NODE == m_dtm.getNodeType(node))
{
m_transformer.getXPathContext().popCurrentNode();
}
}
/**
* Start traversal of the tree at the given node
*
*
* @param node Starting node for traversal
*
* @throws TransformerException
*/
protected void startNode(int node) throws org.xml.sax.SAXException
{
XPathContext xcntxt = m_transformer.getXPathContext();
try
{
if (DTM.ELEMENT_NODE == m_dtm.getNodeType(node))
{
xcntxt.pushCurrentNode(node);
if(m_startNode != node)
{
super.startNode(node);
}
else
{
String elemName = m_dtm.getNodeName(node);
String localName = m_dtm.getLocalName(node);
String namespace = m_dtm.getNamespaceURI(node);
//xcntxt.pushCurrentNode(node);
m_handler.startElement(namespace, localName, elemName, null);
boolean hasNSDecls = false;
DTM dtm = m_dtm;
for (int ns = dtm.getFirstNamespaceNode(node, true);
DTM.NULL != ns; ns = dtm.getNextNamespaceNode(node, ns, true))
{
m_handler.ensureNamespaceDeclDeclared(dtm, ns);
}
// %REVIEW% This flag is apparently never set true. Is that
// a bug, or should this code be phased out?
if(hasNSDecls)
{
m_handler.addNSDeclsToAttrs();
}
for (int attr = dtm.getFirstAttribute(node);
DTM.NULL != attr; attr = dtm.getNextAttribute(attr))
{
m_handler.addAttribute(attr);
}
}
}
else
{
xcntxt.pushCurrentNode(node);
super.startNode(node);
xcntxt.popCurrentNode();
}
}
catch(javax.xml.transform.TransformerException te)
{
throw new org.xml.sax.SAXException(te);
}
}
}