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 }