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