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.FilterInputStream;
021    import java.io.IOException;
022    import java.io.OutputStream;
023    
024    import org.apache.camel.StreamCache;
025    import org.apache.camel.util.IOHelper;
026    
027    /**
028     * A {@link StreamCache} for {@link java.io.ByteArrayInputStream}
029     */
030    public class ByteArrayInputStreamCache extends FilterInputStream implements StreamCache {
031    
032        private final int length;
033    
034        public ByteArrayInputStreamCache(ByteArrayInputStream in) {
035            super(in);
036            this.length = in.available();
037        }
038    
039        public void reset() {
040            try {
041                super.reset();
042            } catch (IOException e) {
043                // ignore
044            }
045        }
046    
047    
048        public void writeTo(OutputStream os) throws IOException {
049            IOHelper.copyAndCloseInput(in, os);
050        }
051    
052        public boolean inMemory() {
053            return true;
054        }
055    
056        @Override
057        public long length() {
058            return length;
059        }
060    }