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.spi.DataFormat;
025    import org.apache.camel.util.ExchangeHelper;
026    
027    /**
028     * The text based <a href="http://camel.apache.org/data-format.html">data format</a> supporting
029     * charset encoding.
030     *
031     * @version 
032     */
033    public class StringDataFormat implements DataFormat {
034    
035        private String charset;
036    
037        public StringDataFormat() {
038        }
039    
040        public StringDataFormat(String charset) {
041            this.charset = charset;
042        }
043    
044        public String getCharset() {
045            return charset;
046        }
047    
048        public void setCharset(String charset) {
049            this.charset = charset;
050        }
051    
052        public void marshal(Exchange exchange, Object graph, OutputStream stream) throws IOException {
053            String text = ExchangeHelper.convertToType(exchange, String.class, graph);
054    
055            byte[] bytes;
056            if (charset != null) {
057                bytes = text.getBytes(charset);
058            } else {
059                bytes = text.getBytes();
060            }
061            stream.write(bytes);
062        }
063    
064        public Object unmarshal(Exchange exchange, InputStream stream) throws IOException {
065            byte[] bytes = ExchangeHelper.convertToType(exchange, byte[].class, stream);
066    
067            String answer;
068            if (charset != null) {
069                answer = new String(bytes, charset);
070            } else {
071                answer = new String(bytes);
072            }
073    
074            return answer;
075        }
076        
077    }