1 /**
2 *
3 * Copyright 2003-2004 The Apache Software Foundation
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.geronimo.converter;
18
19 import org.w3c.dom.Element;
20 import org.w3c.dom.NodeList;
21 import org.w3c.dom.Node;
22
23 /**
24 * Some helper methods for reading DOM trees. Have I written this like 8 times or what?
25 *
26 * @version $Rev: 355877 $ $Date: 2005-12-10 18:48:27 -0800 (Sat, 10 Dec 2005) $
27 */
28 public class DOMUtils {
29 public static String getChildText(Element parent, String childName) {
30 NodeList list = parent.getElementsByTagName(childName);
31 if(list.getLength() > 1) {
32 throw new IllegalStateException();
33 } else if(list.getLength() == 0) {
34 return null;
35 }
36 Element child = (Element) list.item(0);
37 return getText(child);
38 }
39
40 public static String getText(Element element) {
41 StringBuffer buf = new StringBuffer();
42 NodeList list = element.getChildNodes();
43 boolean found = false;
44 for(int i=0; i<list.getLength(); i++) {
45 Node node = list.item(i);
46 if(node.getNodeType() == Node.TEXT_NODE) {
47 buf.append(node.getNodeValue());
48 found = true;
49 }
50 }
51 return found ? buf.toString() : null;
52 }
53 }