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.impl;
018    
019    import java.io.ByteArrayOutputStream;
020    import java.io.InputStream;
021    import java.io.OutputStream;
022    import java.util.zip.Deflater;
023    import java.util.zip.DeflaterOutputStream;
024    import java.util.zip.InflaterInputStream;
025    
026    import org.apache.camel.Exchange;
027    import org.apache.camel.converter.IOConverter;
028    import org.apache.camel.spi.DataFormat;
029    
030    public class ZipDataFormat implements DataFormat {
031    
032        private static final int INITIALBYTEARRAYSIZE = 1048576;
033        private int compressionLevel;
034    
035        public ZipDataFormat() {
036            this.compressionLevel = Deflater.BEST_SPEED;
037        }
038    
039        public ZipDataFormat(int compressionLevel) {
040            this.compressionLevel = compressionLevel;
041        }
042    
043        public void marshal(Exchange exchange, Object body, OutputStream stream)
044            throws Exception {
045            InputStream is;
046            if (body instanceof InputStream) {
047                is = (InputStream)body;
048            }
049            is = exchange.getIn().getBody(InputStream.class);
050            if (is == null) {
051                throw new IllegalArgumentException("Can't get the inputstream for ZipDataFormat mashalling");
052            }
053           
054            DeflaterOutputStream zipOutput = new DeflaterOutputStream(stream, new Deflater(compressionLevel));
055            
056            // Compress the data
057            IOConverter.copy(is, zipOutput);
058            zipOutput.close();
059    
060        }
061    
062        public Object unmarshal(Exchange exchange, InputStream stream)
063            throws Exception {
064            
065            InputStream is = stream;
066            if (is == null) {           
067                exchange.getIn().getBody(InputStream.class);
068            }
069            if (is == null) {
070                throw new IllegalArgumentException("Can't get the inputStream for ZipDataFormat unmashalling");
071            }
072            
073            InflaterInputStream unzipInput = new InflaterInputStream(is);
074            
075            // Create an expandable byte array to hold the inflated data
076            ByteArrayOutputStream bos = new ByteArrayOutputStream();
077            
078            IOConverter.copy(unzipInput, bos);        
079    
080            return bos.toByteArray();
081        }
082    
083    }