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 }