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    import org.apache.camel.util.ExchangeHelper;
030    
031    public class ZipDataFormat implements DataFormat {
032    
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 graph, OutputStream stream)
044            throws Exception {
045    
046            InputStream is = exchange.getContext().getTypeConverter().convertTo(InputStream.class, graph);
047            if (is == null) {
048                throw new IllegalArgumentException("Cannot get the inputstream for ZipDataFormat mashalling");
049            }
050    
051            DeflaterOutputStream zipOutput = new DeflaterOutputStream(stream, new Deflater(compressionLevel));
052            try {
053                IOConverter.copy(is, zipOutput);
054            } finally {
055                zipOutput.close();
056            }
057        }
058    
059        public Object unmarshal(Exchange exchange, InputStream stream)
060            throws Exception {
061    
062            InputStream is = ExchangeHelper.getMandatoryInBody(exchange, InputStream.class);
063            InflaterInputStream unzipInput = new InflaterInputStream(is);
064            
065            // Create an expandable byte array to hold the inflated data
066            ByteArrayOutputStream bos = new ByteArrayOutputStream();
067            IOConverter.copy(unzipInput, bos);
068            return bos.toByteArray();
069        }
070    
071    }