01: /**
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * 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: */package org.apache.geronimo.converter;
17:
18: import org.w3c.dom.Element;
19: import org.w3c.dom.NodeList;
20: import org.w3c.dom.Node;
21:
22: /**
23: * Some helper methods for reading DOM trees. Have I written this like 8 times or what?
24: *
25: * @version $Rev: 547737 $ $Date: 2007-06-15 09:47:19 -0700 (Fri, 15 Jun 2007) $
26: */
27: public class DOMUtils {
28: public static String getChildText(Element parent, String childName) {
29: NodeList list = parent.getElementsByTagName(childName);
30: if (list.getLength() > 1) {
31: throw new IllegalStateException(
32: "Multiple child elements with name " + childName);
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: }
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