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 */
017package org.apache.camel.converter.stream;
018
019import java.io.IOException;
020import java.io.OutputStream;
021import java.io.StringReader;
022
023import org.apache.camel.Exchange;
024import org.apache.camel.StreamCache;
025
026/**
027 * A {@link org.apache.camel.StreamCache} for String {@link java.io.Reader}s
028 */
029public class ReaderCache extends StringReader implements StreamCache {
030
031    private final String data;
032
033    public ReaderCache(String data) {
034        super(data);
035        this.data = data;
036    }
037
038    public void close() {
039        // Do not release the string for caching
040    }
041
042    @Override
043    public void reset() {
044        try {
045            super.reset();
046        } catch (IOException e) {
047            // ignore
048        }
049    }
050
051    public void writeTo(OutputStream os) throws IOException {
052        os.write(data.getBytes());
053    }
054
055    public StreamCache copy(Exchange exchange) throws IOException {
056        return new ReaderCache(data);
057    }
058
059    public boolean inMemory() {
060        return true;
061    }
062
063    public long length() {
064        return data.length();
065    }
066
067    String getData() {
068        return data;
069    }
070
071}