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


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.lang.reflect.Method JavaDoc;
20
21 import com.thoughtworks.xstream.converters.ConversionException;
22 import com.thoughtworks.xstream.converters.Converter;
23 import com.thoughtworks.xstream.converters.MarshallingContext;
24 import com.thoughtworks.xstream.converters.UnmarshallingContext;
25 import com.thoughtworks.xstream.io.HierarchicalStreamReader;
26 import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
27
28 /**
29  * @version $Rev: 476049 $ $Date: 2006-11-16 23:35:17 -0500 (Thu, 16 Nov 2006) $
30  */
31 public class QNameConverter implements Converter {
32     private static final String JavaDoc QNAME_CLASS = "javax.xml.namespace.QName";
33
34     public boolean canConvert(Class JavaDoc clazz) {
35         return QNAME_CLASS.equals(clazz.getName());
36     }
37
38     public void marshal(Object JavaDoc object, HierarchicalStreamWriter writer, MarshallingContext marshallingContext) {
39         writer.setValue(object.toString());
40     }
41
42     public Object JavaDoc unmarshal(HierarchicalStreamReader reader, UnmarshallingContext unmarshallingContext) {
43         Class JavaDoc qnameClass = unmarshallingContext.getRequiredType();
44         if (!canConvert(qnameClass)) {
45             throw new ConversionException("Unexpected type in unmarshal: " + qnameClass.getName());
46         }
47
48         String JavaDoc qnameString = reader.getValue();
49         try {
50             Method JavaDoc method = qnameClass.getMethod("valueOf", new Class JavaDoc[]{String JavaDoc.class});
51             Object JavaDoc qname = method.invoke(null, new Object JavaDoc[] { qnameString });
52             return qname;
53         } catch (Exception JavaDoc e) {
54             throw new ConversionException("Unable to convert value to a qname: " + qnameString);
55         }
56     }
57 }
58
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