/*

 * reserved comment block

 * DO NOT REMOVE OR ALTER!

 */

/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You under the Apache License, Version 2.0

 * (the "License"); you may not use this file except in compliance with

 * the License.  You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.sun.org.apache.xpath.internal.objects;

import com.sun.org.apache.xml.internal.dtm.DTMManager;

import com.sun.org.apache.xpath.internal.NodeSetDTM;

import com.sun.org.apache.xpath.internal.XPathContext;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

import org.w3c.dom.traversal.NodeIterator;

/**

 * This class overrides the XNodeSet#object() method to provide the original

 * Node object, NodeList object, or NodeIterator.

 */

public class XNodeSetForDOM extends XNodeSet

{

    static final long serialVersionUID = -8396190713754624640L;

  Object m_origObj;

  public XNodeSetForDOM(Node node, DTMManager dtmMgr)

  {

    m_dtmMgr = dtmMgr;

    m_origObj = node;

    int dtmHandle = dtmMgr.getDTMHandleFromNode(node);

    setObject(new NodeSetDTM(dtmMgr));

    ((NodeSetDTM) m_obj).addNode(dtmHandle);

  }

  /**

   * Construct a XNodeSet object.

   *

   * @param val Value of the XNodeSet object

   */

  public XNodeSetForDOM(XNodeSet val)

  {

        super(val);

        if(val instanceof XNodeSetForDOM)

        m_origObj = ((XNodeSetForDOM)val).m_origObj;

  }

  public XNodeSetForDOM(NodeList nodeList, XPathContext xctxt)

  {

    m_dtmMgr = xctxt.getDTMManager();

    m_origObj = nodeList;

    // JKESS 20020514: Longer-term solution is to force

    // folks to request length through an accessor, so we can defer this

    // retrieval... but that requires an API change.

    // m_obj=new com.sun.org.apache.xpath.internal.NodeSetDTM(nodeList, xctxt);

    com.sun.org.apache.xpath.internal.NodeSetDTM nsdtm=new com.sun.org.apache.xpath.internal.NodeSetDTM(nodeList, xctxt);

    m_last=nsdtm.getLength();

    setObject(nsdtm);

  }

  public XNodeSetForDOM(NodeIterator nodeIter, XPathContext xctxt)

  {

    m_dtmMgr = xctxt.getDTMManager();

    m_origObj = nodeIter;

    // JKESS 20020514: Longer-term solution is to force

    // folks to request length through an accessor, so we can defer this

    // retrieval... but that requires an API change.

    // m_obj = new com.sun.org.apache.xpath.internal.NodeSetDTM(nodeIter, xctxt);

    com.sun.org.apache.xpath.internal.NodeSetDTM nsdtm=new com.sun.org.apache.xpath.internal.NodeSetDTM(nodeIter, xctxt);

    m_last=nsdtm.getLength();

    setObject(nsdtm);

  }

  /**

   * Return the original DOM object that the user passed in.  For use primarily

   * by the extension mechanism.

   *

   * @return The object that this class wraps

   */

  public Object object()

  {

    return m_origObj;

  }

  /**

   * Cast result object to a nodelist. Always issues an error.

   *

   * @return null

   *

   * @throws javax.xml.transform.TransformerException

   */

  public NodeIterator nodeset() throws javax.xml.transform.TransformerException

  {

    return (m_origObj instanceof NodeIterator)

                   ? (NodeIterator)m_origObj : super.nodeset();

  }

  /**

   * Cast result object to a nodelist. Always issues an error.

   *

   * @return null

   *

   * @throws javax.xml.transform.TransformerException

   */

  public NodeList nodelist() throws javax.xml.transform.TransformerException

  {

    return (m_origObj instanceof NodeList)

                   ? (NodeList)m_origObj : super.nodelist();

  }

}