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.camel.dataformat.xstream;
018    
019    import java.io.InputStream;
020    import java.io.OutputStream;
021    import java.util.HashMap;
022    import java.util.Map;
023    
024    import javax.xml.stream.XMLStreamException;
025    
026    import com.thoughtworks.xstream.io.HierarchicalStreamReader;
027    import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
028    import com.thoughtworks.xstream.io.xml.QNameMap;
029    import com.thoughtworks.xstream.io.xml.StaxReader;
030    import com.thoughtworks.xstream.io.xml.StaxWriter;
031    
032    import org.apache.camel.Exchange;
033    import org.apache.camel.spi.DataFormat;
034    import org.codehaus.jettison.mapped.MappedXMLInputFactory;
035    import org.codehaus.jettison.mapped.MappedXMLOutputFactory;
036    
037    /**
038     * A <a href="http://camel.apache.org/data-format.html">data format</a>
039     * ({@link DataFormat}) using XStream and Jettison to marshal to and from JSON
040     *
041     * @version $Revision: 748596 $
042     */
043    
044    public class JsonDataFormat extends AbstractXStreamWrapper {
045        private final MappedXMLOutputFactory mof;
046        private final MappedXMLInputFactory mif;
047        
048        public JsonDataFormat() {
049            final Map nstjsons = new HashMap();
050            mof = new MappedXMLOutputFactory(nstjsons);
051            mif = new MappedXMLInputFactory(nstjsons);
052        }
053    
054        protected HierarchicalStreamWriter createHierarchicalStreamWriter(Exchange exchange, Object body, OutputStream stream) throws XMLStreamException {        
055            return new StaxWriter(new QNameMap(), mof.createXMLStreamWriter(stream));
056        }
057    
058        protected HierarchicalStreamReader createHierarchicalStreamReader(Exchange exchange, InputStream stream) throws XMLStreamException {        
059            return new StaxReader(new QNameMap(), mif.createXMLStreamReader(stream));
060        }
061    
062    }