/*
 * The Apache Software License, Version 1.1 
 * 
 *
 * Copyright (c) 1999 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.xpath.xml;

import org.w3c.dom.*;
import org.xml.sax.*;
import org.xml.sax.ext.LexicalHandler;

import org.apache.xml.utils.AttList;

/**
 * <meta name="usage" content="advanced"/>
 * This class does a pre-order walk of the DOM tree, calling the FormatterListener
 * interface as it goes.
 */
public class TreeWalker //extends org.apache.xml.utils.TreeWalker
{
  
  org.apache.xml.utils.TreeWalker m_walker; 
  
  /**
   * Constructor.
   * @param   formatterListener The implemention of the 
   * FormatterListener operation (toXMLString, digest, ...)
   */
  public TreeWalker(DocumentHandler formatterListener) 
  {
    if(formatterListener instanceof FormatterToXML)
      m_walker = new org.apache.xml.utils.TreeWalker(((FormatterToXML)formatterListener).getSerializerObject(), new org.apache.xpath.DOM2Helper());
    //super(formatterListener);
  } 
 
  /**
   * Perform a pre-order traversal non-recursive style.
   */
  public void traverse(Node pos) throws SAXException 
  {
    m_walker.traverse(pos);
  }
  
  /**
   * Perform a pre-order traversal non-recursive style.
   */
  public void traverse(Node pos, Node top) throws SAXException 
  {
    m_walker.traverse(pos, top);
  }
  
  
  
}  //TreeWalker