1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 /* 19 * $Id: XNodeSetForDOM.java 469368 2006-10-31 04:41:36Z minchau $ 20 */ 21 package org.apache.xpath.objects; 22 23 import org.apache.xml.dtm.DTMManager; 24 import org.apache.xpath.NodeSetDTM; 25 import org.apache.xpath.XPathContext; 26 27 import org.w3c.dom.Node; 28 import org.w3c.dom.NodeList; 29 import org.w3c.dom.traversal.NodeIterator; 30 31 /** 32 * This class overrides the XNodeSet#object() method to provide the original 33 * Node object, NodeList object, or NodeIterator. 34 */ 35 public class XNodeSetForDOM extends XNodeSet 36 { 37 static final long serialVersionUID = -8396190713754624640L; 38 Object m_origObj; 39 40 public XNodeSetForDOM(Node node, DTMManager dtmMgr) 41 { 42 m_dtmMgr = dtmMgr; 43 m_origObj = node; 44 int dtmHandle = dtmMgr.getDTMHandleFromNode(node); 45 setObject(new NodeSetDTM(dtmMgr)); 46 ((NodeSetDTM) m_obj).addNode(dtmHandle); 47 } 48 49 /** 50 * Construct a XNodeSet object. 51 * 52 * @param val Value of the XNodeSet object 53 */ 54 public XNodeSetForDOM(XNodeSet val) 55 { 56 super(val); 57 if(val instanceof XNodeSetForDOM) 58 m_origObj = ((XNodeSetForDOM)val).m_origObj; 59 } 60 61 public XNodeSetForDOM(NodeList nodeList, XPathContext xctxt) 62 { 63 m_dtmMgr = xctxt.getDTMManager(); 64 m_origObj = nodeList; 65 66 // JKESS 20020514: Longer-term solution is to force 67 // folks to request length through an accessor, so we can defer this 68 // retrieval... but that requires an API change. 69 // m_obj=new org.apache.xpath.NodeSetDTM(nodeList, xctxt); 70 org.apache.xpath.NodeSetDTM nsdtm=new org.apache.xpath.NodeSetDTM(nodeList, xctxt); 71 m_last=nsdtm.getLength(); 72 setObject(nsdtm); 73 } 74 75 public XNodeSetForDOM(NodeIterator nodeIter, XPathContext xctxt) 76 { 77 m_dtmMgr = xctxt.getDTMManager(); 78 m_origObj = nodeIter; 79 80 // JKESS 20020514: Longer-term solution is to force 81 // folks to request length through an accessor, so we can defer this 82 // retrieval... but that requires an API change. 83 // m_obj = new org.apache.xpath.NodeSetDTM(nodeIter, xctxt); 84 org.apache.xpath.NodeSetDTM nsdtm=new org.apache.xpath.NodeSetDTM(nodeIter, xctxt); 85 m_last=nsdtm.getLength(); 86 setObject(nsdtm); 87 } 88 89 /** 90 * Return the original DOM object that the user passed in. For use primarily 91 * by the extension mechanism. 92 * 93 * @return The object that this class wraps 94 */ 95 public Object object() 96 { 97 return m_origObj; 98 } 99 100 /** 101 * Cast result object to a nodelist. Always issues an error. 102 * 103 * @return null 104 * 105 * @throws javax.xml.transform.TransformerException 106 */ 107 public NodeIterator nodeset() throws javax.xml.transform.TransformerException 108 { 109 return (m_origObj instanceof NodeIterator) 110 ? (NodeIterator)m_origObj : super.nodeset(); 111 } 112 113 /** 114 * Cast result object to a nodelist. Always issues an error. 115 * 116 * @return null 117 * 118 * @throws javax.xml.transform.TransformerException 119 */ 120 public NodeList nodelist() throws javax.xml.transform.TransformerException 121 { 122 return (m_origObj instanceof NodeList) 123 ? (NodeList)m_origObj : super.nodelist(); 124 } 125 126 127 128 } 129
