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
7 * "License"); you may not use this file except in compliance
8 * with the License. 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,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.ws.commons.schema;
20
21 import java.util.ArrayList;
22 import java.util.List;
23
24 import org.w3c.dom.DocumentFragment;
25 import org.w3c.dom.Node;
26 import org.w3c.dom.NodeList;
27
28 /**
29 * Class to return a node list without thread-safety issue.
30 *
31 */
32 class DocumentFragmentNodeList implements NodeList {
33 private List nodes;
34 private DocumentFragment fragment;
35
36 /**
37 * Construct a list of the children of a given node.
38 * @param parentNode node from which to copy children.
39 */
40 DocumentFragmentNodeList(Node parentNode) {
41 fragment = parentNode.getOwnerDocument().createDocumentFragment();
42 nodes = new ArrayList();
43 for(Node child = parentNode.getFirstChild(); child != null; child = child.getNextSibling()) {
44 nodes.add(fragment.appendChild(child.cloneNode(true)));
45 }
46 }
47
48 /**
49 * Create a list of the children of a given node that are elements with a specified qualified name.
50 * @param parentNode node from which to copy children.
51 * @param filterUri Namespace URI of children to copy.
52 * @param filterLocal Local name of children to copy.
53 */
54 DocumentFragmentNodeList(Node parentNode, String filterUri, String filterLocal) {
55 fragment = parentNode.getOwnerDocument().createDocumentFragment();
56 nodes = new ArrayList();
57 for(Node child = parentNode.getFirstChild(); child != null; child = child.getNextSibling()) {
58 if(child.getNodeType() == Node.ELEMENT_NODE
59 && child.getNamespaceURI().equals(filterUri)
60 && child.getLocalName().equals(filterLocal)) {
61 nodes.add(fragment.appendChild(child.cloneNode(true)));
62 }
63 }
64 }
65
66 public int getLength() {
67 return nodes.size();
68 }
69
70 public Node item(int index) {
71 if(nodes == null) {
72 return null;
73 } else {
74 return (Node) nodes.get(index);
75 }
76 }
77
78 }