1/* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package com.sun.org.apache.xpath.internal.jaxp; 27 28import java.util.Iterator; 29import javax.xml.xpath.XPathException; 30import javax.xml.xpath.XPathNodes; 31import javax.xml.xpath.XPathEvaluationResult.XPathResultType; 32import org.w3c.dom.Node; 33import org.w3c.dom.NodeList; 34 35/** 36 * This class implements XPathNodes that represents a set of nodes selected by 37 * evaluating an expression. 38 */ 39public class XPathNodesImpl implements XPathNodes { 40 Class<Node> elementType; 41 NodeList nodeList = null; 42 43 public XPathNodesImpl(NodeList nodeList, Class<Node> elementType) { 44 this.nodeList = nodeList; 45 this.elementType = elementType; 46 } 47 48 @Override 49 public Iterator<Node> iterator() { 50 return new NodeSetIterator<>(elementType); 51 } 52 53 class NodeSetIterator<E> implements Iterator<E> { 54 int currentIndex; 55 Class<E> elementType; 56 NodeSetIterator(Class<E> elementType) { 57 this.elementType = elementType; 58 } 59 public boolean hasNext() { 60 if (nodeList != null) { 61 return currentIndex < nodeList.getLength(); 62 } 63 64 return false; 65 } 66 67 public E next() { 68 if (nodeList != null && nodeList.getLength() > 0) { 69 return elementType.cast(nodeList.item(currentIndex++)); 70 } 71 return null; 72 } 73 } 74 75 @Override 76 public int size() { 77 if (nodeList != null) { 78 return nodeList.getLength(); 79 } 80 return 0; 81 } 82 83 @Override 84 public Node get(int index) throws XPathException { 85 if (index <0 || index >= size()) { 86 throw new IndexOutOfBoundsException("Index " + index + " is out of bounds"); 87 } 88 if (nodeList != null) { 89 return nodeList.item(index); 90 } 91 return null; 92 } 93} 94