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.InputStream;
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.ExchangeHelper;
026    import org.apache.camel.util.ObjectHelper;
027    
028    /**
029     * Unmarshals the body of the incoming message using the given
030     * <a href="http://camel.apache.org/data-format.html">data format</a>
031     *
032     * @version $Revision: 749193 $
033     */
034    public class UnmarshalProcessor implements Processor {
035        private final DataFormat dataFormat;
036    
037        public UnmarshalProcessor(DataFormat dataFormat) {
038            this.dataFormat = dataFormat;
039        }
040    
041        public void process(Exchange exchange) throws Exception {
042            ObjectHelper.notNull(dataFormat, "dataFormat");
043    
044            InputStream stream = ExchangeHelper.getMandatoryInBody(exchange, InputStream.class);
045            try {
046                // lets setup the out message before we invoke the dataFormat
047                // so that it can mutate it if necessary
048                Message out = exchange.getOut(true);
049                out.copyFrom(exchange.getIn());
050    
051                Object result = dataFormat.unmarshal(exchange, stream);
052                out.setBody(result);
053            } finally {
054                if (stream != null) {
055                    stream.close();
056                }
057            }
058        }
059    }