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Java > Open Source Codes > org > apache > geronimo > kernel > config > xstream > XStreamGBeanStateConverter


1 /**
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements. See the NOTICE file distributed with
4  * this work for additional information regarding copyright ownership.
5  * The ASF licenses this file to You under the Apache License, Version 2.0
6  * (the "License"); you may not use this file except in compliance with
7  * the License. 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 JavaDoc;
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 JavaDoc;
28 import org.w3c.dom.NodeList JavaDoc;
29 import org.w3c.dom.Node JavaDoc;
30
31 /**
32  * @version $Rev: 476049 $ $Date: 2006-11-16 23:35:17 -0500 (Thu, 16 Nov 2006) $
33  */
34 public class XStreamGBeanStateConverter implements Converter {
35     public boolean canConvert(Class JavaDoc clazz) {
36         return XStreamGBeanState.class.isAssignableFrom(clazz);
37     }
38
39     public void marshal(Object JavaDoc object, HierarchicalStreamWriter writer, MarshallingContext marshallingContext) {
40         XStreamGBeanState gbeanState = (XStreamGBeanState) object;
41         Element JavaDoc element = null;
42         try {
43             element = gbeanState.getGBeanState();
44         } catch (IOException JavaDoc e) {
45             throw new ConversionException("Cannot get xml version of gbeans", e);
46         }
47         marshallingContext.convertAnother(element);
48     }
49
50     public Object JavaDoc unmarshal(HierarchicalStreamReader reader, UnmarshallingContext unmarshallingContext) {
51         Element JavaDoc element = (Element JavaDoc) unmarshallingContext.convertAnother(reader, Element JavaDoc.class);
52         NodeList JavaDoc childNodes = element.getChildNodes();
53         for (int i = 0; i < childNodes.getLength(); i ++) {
54             Node JavaDoc node = childNodes.item(i);
55             if (node instanceof Element JavaDoc) {
56                 element = (Element JavaDoc) node;
57                 return new XStreamGBeanState(element);
58             }
59         }
60         throw new ConversionException("No nested nodes found");
61     }
62 }
63
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