1 /* 2 * reserved comment block 3 * DO NOT REMOVE OR ALTER! 4 */ 5 /* 6 * Copyright 1999-2004 The Apache Software Foundation. 7 * 8 * Licensed under the Apache License, Version 2.0 (the "License"); 9 * you may not use this file except in compliance with the License. 10 * You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 * 20 */ 21 package com.sun.org.apache.xml.internal.security.utils; 22 23 import java.util.ArrayList; 24 import java.util.List; 25 26 import org.w3c.dom.Document; 27 import org.w3c.dom.Node; 28 import org.w3c.dom.NodeList; 29 30 /** 31 * 32 * @author Christian Geuer-Pollmann 33 * 34 */ 35 public class HelperNodeList implements NodeList { 36 37 /** Field nodes */ 38 List<Node> nodes = new ArrayList<Node>(20); 39 boolean _allNodesMustHaveSameParent = false; 40 41 /** 42 * 43 */ 44 public HelperNodeList() { 45 this(false); 46 } 47 48 49 /** 50 * @param allNodesMustHaveSameParent 51 */ 52 public HelperNodeList(boolean allNodesMustHaveSameParent) { 53 this._allNodesMustHaveSameParent = allNodesMustHaveSameParent; 54 } 55 56 /** 57 * Method item 58 * 59 * @param index 60 * @return node with inde i 61 */ 62 public Node item(int index) { 63 64 // log.log(java.util.logging.Level.FINE, "item(" + index + ") of " + this.getLength() + " nodes"); 65 66 return nodes.get(index); 67 } 68 69 /** 70 * Method getLength 71 * 72 * @return length of the list 73 */ 74 public int getLength() { 75 return nodes.size(); 76 } 77 78 /** 79 * Method appendChild 80 * 81 * @param node 82 * @throws IllegalArgumentException 83 */ 84 public void appendChild(Node node) throws IllegalArgumentException { 85 if (this._allNodesMustHaveSameParent && this.getLength() > 0) { 86 if (this.item(0).getParentNode() != node.getParentNode()) { 87 throw new IllegalArgumentException("Nodes have not the same Parent"); 88 } 89 } 90 nodes.add(node); 91 } 92 93 /** 94 * @return the document that contains this nodelist 95 */ 96 public Document getOwnerDocument() { 97 if (this.getLength() == 0) { 98 return null; 99 } 100 return XMLUtils.getOwnerDocument(this.item(0)); 101 } 102 }