001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements. See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership. The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the  "License");
007     * you may not use this file except in compliance with the License.
008     * You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package org.apache.xpath.objects;
020    
021    import org.apache.xml.dtm.DTM;
022    import org.apache.xpath.XPathContext;
023    /*
024     * 
025     * @author igorh
026     *
027     * Simple wrapper to DTM and XPathContext objects.
028     * Used in XRTreeFrag for caching references to the objects.
029     */
030     public final class DTMXRTreeFrag {
031      private DTM m_dtm;
032      private int m_dtmIdentity = DTM.NULL;
033      private XPathContext m_xctxt;
034     
035      public DTMXRTreeFrag(int dtmIdentity, XPathContext xctxt){
036          m_xctxt = xctxt;
037          m_dtmIdentity = dtmIdentity;
038          m_dtm = xctxt.getDTM(dtmIdentity); 
039        }
040    
041      public final void destruct(){
042        m_dtm = null;         
043        m_xctxt = null; 
044     }
045    
046    final  DTM getDTM(){return m_dtm;}
047    public final  int getDTMIdentity(){return m_dtmIdentity;}
048    final  XPathContext getXPathContext(){return m_xctxt;}
049    
050    public final int hashCode() { return m_dtmIdentity; }
051    public final boolean equals(Object obj) {
052       if (obj instanceof DTMXRTreeFrag) {
053           return (m_dtmIdentity == ((DTMXRTreeFrag)obj).getDTMIdentity());
054       }
055       return false;
056     }
057    
058    }