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.impl;
018    
019    import java.io.IOException;
020    import java.io.InputStream;
021    import java.io.OutputStream;
022    
023    import org.apache.camel.Exchange;
024    import org.apache.camel.converter.IOConverter;
025    import org.apache.camel.spi.DataFormat;
026    import org.apache.camel.util.ExchangeHelper;
027    
028    /**
029     * The text based <a href="http://activemq.apache.org/camel/data-format.html">data format</a> supporting
030     * charset encoding.
031     *
032     * @version $Revision: 37863 $
033     */
034    public class StringDataFormat implements DataFormat {
035    
036        private String charset;
037    
038        public StringDataFormat(String charset) {
039            this.charset = charset;
040        }
041    
042        public void marshal(Exchange exchange, Object graph, OutputStream stream) throws IOException {
043            String text = ExchangeHelper.convertToType(exchange, String.class, graph);
044    
045            byte[] bytes;
046            if (charset != null) {
047                bytes = text.getBytes(charset);
048            } else {
049                bytes = text.getBytes();
050            }
051            stream.write(bytes);
052        }
053    
054        public Object unmarshal(Exchange exchange, InputStream stream) throws IOException, ClassNotFoundException {
055            byte[] bytes = IOConverter.toBytes(stream);
056    
057            String answer;
058            if (charset != null) {
059                answer = new String(bytes, charset);
060            } else {
061                answer = new String(bytes);
062            }
063    
064            return answer;
065        }
066        
067    }