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 */ 017package org.apache.camel.impl; 018 019import java.io.InputStream; 020import java.io.OutputStream; 021import java.util.zip.Deflater; 022import java.util.zip.DeflaterOutputStream; 023import java.util.zip.InflaterInputStream; 024 025import org.apache.camel.Exchange; 026import org.apache.camel.converter.stream.OutputStreamBuilder; 027import org.apache.camel.spi.DataFormat; 028import org.apache.camel.spi.DataFormatName; 029import org.apache.camel.util.IOHelper; 030 031/** 032 * "Deflate" compression data format. 033 * See {@link org.apache.camel.model.dataformat.ZipFileDataFormat} for Zip file compression. 034 */ 035public class ZipDataFormat extends org.apache.camel.support.ServiceSupport implements DataFormat, DataFormatName { 036 037 private int compressionLevel; 038 039 public ZipDataFormat() { 040 this.compressionLevel = Deflater.BEST_SPEED; 041 } 042 043 public ZipDataFormat(int compressionLevel) { 044 this.compressionLevel = compressionLevel; 045 } 046 047 @Override 048 public String getDataFormatName() { 049 return "zip"; 050 } 051 052 public int getCompressionLevel() { 053 return compressionLevel; 054 } 055 056 public void setCompressionLevel(int compressionLevel) { 057 this.compressionLevel = compressionLevel; 058 } 059 060 public void marshal(final Exchange exchange, final Object graph, final OutputStream stream) throws Exception { 061 // ask for a mandatory type conversion to avoid a possible NPE beforehand as we do copy from the InputStream 062 final InputStream is = exchange.getContext().getTypeConverter().mandatoryConvertTo(InputStream.class, exchange, graph); 063 064 final Deflater deflater = new Deflater(compressionLevel); 065 final DeflaterOutputStream zipOutput = new DeflaterOutputStream(stream, deflater); 066 try { 067 IOHelper.copy(is, zipOutput); 068 } finally { 069 IOHelper.close(is, zipOutput); 070 071 /* 072 * As we create the Deflater our self and do not use the stream default 073 * (see {@link java.util.zip.DeflaterOutputStream#usesDefaultDeflater}) 074 * we need to close the Deflater to not risk a OutOfMemoryException 075 * in native code parts (see {@link java.util.zip.Deflater#end}) 076 */ 077 deflater.end(); 078 } 079 } 080 081 public Object unmarshal(final Exchange exchange, final InputStream inputStream) throws Exception { 082 InflaterInputStream inflaterInputStream = new InflaterInputStream(inputStream); 083 OutputStreamBuilder osb = OutputStreamBuilder.withExchange(exchange); 084 085 try { 086 IOHelper.copy(inflaterInputStream, osb); 087 return osb.build(); 088 } finally { 089 // must close input streams 090 IOHelper.close(osb, inflaterInputStream, inputStream); 091 } 092 } 093 094 @Override 095 protected void doStart() throws Exception { 096 // noop 097 } 098 099 @Override 100 protected void doStop() throws Exception { 101 // noop 102 } 103}