001    /**
002     *  Licensed to the Apache Software Foundation (ASF) under one or more
003     *  contributor license agreements.  See the NOTICE file distributed with
004     *  this work for additional information regarding copyright ownership.
005     *  The ASF licenses this file to You under the Apache License, Version 2.0
006     *  (the "License"); you may not use this file except in compliance with
007     *  the License.  You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     *  Unless required by applicable law or agreed to in writing, software
012     *  distributed under the License is distributed on an "AS IS" BASIS,
013     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     *  See the License for the specific language governing permissions and
015     *  limitations under the License.
016     */
017    package org.apache.geronimo.kernel.config.xstream;
018    
019    import java.lang.reflect.Method;
020    
021    import com.thoughtworks.xstream.converters.ConversionException;
022    import com.thoughtworks.xstream.converters.Converter;
023    import com.thoughtworks.xstream.converters.MarshallingContext;
024    import com.thoughtworks.xstream.converters.UnmarshallingContext;
025    import com.thoughtworks.xstream.io.HierarchicalStreamReader;
026    import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
027    
028    /**
029     * @version $Rev: 706640 $ $Date: 2008-10-21 14:44:05 +0000 (Tue, 21 Oct 2008) $
030     */
031    public class QNameConverter implements Converter {
032        private static final String QNAME_CLASS = "javax.xml.namespace.QName";
033    
034        public boolean canConvert(Class clazz) {
035            return QNAME_CLASS.equals(clazz.getName());
036        }
037    
038        public void marshal(Object object, HierarchicalStreamWriter writer, MarshallingContext marshallingContext) {
039            writer.setValue(object.toString());
040        }
041    
042        public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext unmarshallingContext) {
043            Class qnameClass = unmarshallingContext.getRequiredType();
044            if (!canConvert(qnameClass)) {
045                throw new ConversionException("Unexpected type in unmarshal: " + qnameClass.getName());
046            }
047    
048            String qnameString = reader.getValue();
049            try {
050                Method method = qnameClass.getMethod("valueOf", new Class[]{String.class});
051                Object qname = method.invoke(null, new Object[] { qnameString });
052                return qname;
053            } catch (Exception e) {
054                throw new ConversionException("Unable to convert value to a qname: " + qnameString, e);
055            }
056        }
057    }