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.processor;
018    
019    import java.io.ByteArrayOutputStream;
020    
021    import org.apache.camel.Exchange;
022    import org.apache.camel.Message;
023    import org.apache.camel.Processor;
024    import org.apache.camel.spi.DataFormat;
025    import org.apache.camel.util.ObjectHelper;
026    
027    /**
028     * Marshals the body of the incoming message using the given
029     * <a href="http://camel.apache.org/data-format.html">data format</a>
030     *
031     * @version $Revision: 17083 $
032     */
033    public class MarshalProcessor implements Processor, Traceable {
034        private final DataFormat dataFormat;
035    
036        public MarshalProcessor(DataFormat dataFormat) {
037            this.dataFormat = dataFormat;
038        }
039    
040        public void process(Exchange exchange) throws Exception {
041            ObjectHelper.notNull(dataFormat, "dataFormat");
042    
043            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
044            Message in = exchange.getIn();
045            Object body = in.getBody();
046    
047            // lets setup the out message before we invoke the dataFormat
048            // so that it can mutate it if necessary
049            Message out = exchange.getOut();
050            out.copyFrom(in);
051    
052            dataFormat.marshal(exchange, body, buffer);
053            byte[] data = buffer.toByteArray();
054            out.setBody(data);
055        }
056    
057        @Override
058        public String toString() {
059            return "Marshal[" + dataFormat + "]";
060        }
061    
062        public String getTraceLabel() {
063            return "marshal[" + dataFormat + "]";
064        }
065    }