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.converter.stream;
018    
019    import java.io.IOException;
020    import java.io.OutputStream;
021    import java.io.StringReader;
022    
023    import org.apache.camel.StreamCache;
024    import org.slf4j.Logger;
025    import org.slf4j.LoggerFactory;
026    
027    /**
028     * {@link org.apache.camel.StreamCache} implementation for Cache the Reader {@link java.io.Reader}s
029     */
030    public class ReaderCache extends StringReader implements StreamCache {
031    
032        private static final transient Logger LOG = LoggerFactory.getLogger(ReaderCache.class);
033    
034        private String data;
035    
036        public ReaderCache(String data) {
037            super(data);
038            this.data = data;
039        }
040    
041        public void close() {
042            // Do not release the string for caching
043        }
044    
045        @Override
046        public void reset() {
047            try {
048                super.reset();
049            } catch (IOException e) {
050                LOG.warn("Cannot reset cache", e);
051            }
052        }
053    
054        public void writeTo(OutputStream os) throws IOException {
055            os.write(data.getBytes());
056        }
057    
058        String getData() {
059            return data;
060        }
061    
062    }