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.ByteArrayInputStream;
020import java.io.IOException;
021import java.io.OutputStream;
022
023import org.apache.camel.Exchange;
024import org.apache.camel.StreamCache;
025
026/**
027 * A {@link StreamCache} for caching using an in-memory byte array.
028 */
029public final class InputStreamCache extends ByteArrayInputStream implements StreamCache {
030
031    public InputStreamCache(byte[] data) {
032        super(data);
033    }
034
035    public InputStreamCache(byte[] data, int count) {
036        super(data);
037        super.count = count;
038    }
039    
040    public void writeTo(OutputStream os) throws IOException {
041        os.write(buf, pos, count - pos);
042    }
043
044    public StreamCache copy(Exchange exchange) {
045        return new InputStreamCache(buf, count);
046    }
047
048    public boolean inMemory() {
049        return true;
050    }
051
052    public long length() {
053        return count;
054    }
055}