1 /**
2 *
3 * Copyright 2005 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.kernel.config.xstream;
18
19 import java.io.IOException;
20
21 import com.thoughtworks.xstream.converters.Converter;
22 import com.thoughtworks.xstream.converters.MarshallingContext;
23 import com.thoughtworks.xstream.converters.UnmarshallingContext;
24 import com.thoughtworks.xstream.converters.ConversionException;
25 import com.thoughtworks.xstream.io.HierarchicalStreamReader;
26 import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
27 import org.w3c.dom.Element;
28 import org.w3c.dom.NodeList;
29 import org.w3c.dom.Node;
30
31 /**
32 * @version $Rev: 410741 $ $Date: 2006-05-31 21:35:48 -0700 (Wed, 31 May 2006) $
33 */
34 public class XStreamGBeanStateConverter implements Converter {
35 public boolean canConvert(Class clazz) {
36 return XStreamGBeanState.class.isAssignableFrom(clazz);
37 }
38
39 public void marshal(Object object, HierarchicalStreamWriter writer, MarshallingContext marshallingContext) {
40 XStreamGBeanState gbeanState = (XStreamGBeanState) object;
41 Element element = null;
42 try {
43 element = gbeanState.getGBeanState();
44 } catch (IOException e) {
45 throw new ConversionException("Cannot get xml version of gbeans", e);
46 }
47 marshallingContext.convertAnother(element);
48 }
49
50 public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext unmarshallingContext) {
51 Element element = (Element) unmarshallingContext.convertAnother(reader, Element.class);
52 NodeList childNodes = element.getChildNodes();
53 for (int i = 0; i < childNodes.getLength(); i ++) {
54 Node node = childNodes.item(i);
55 if (node instanceof Element) {
56 element = (Element) node;
57 return new XStreamGBeanState(element);
58 }
59 }
60 throw new ConversionException("No nested nodes found");
61 }
62 }