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.GZIPInputStream; 022import java.util.zip.GZIPOutputStream; 023 024import org.apache.camel.Exchange; 025import org.apache.camel.converter.stream.OutputStreamBuilder; 026import org.apache.camel.spi.DataFormat; 027import org.apache.camel.spi.DataFormatName; 028import org.apache.camel.util.IOHelper; 029 030/** 031 * GZip {@link org.apache.camel.spi.DataFormat} for reading/writing data using gzip. 032 */ 033public class GzipDataFormat extends org.apache.camel.support.ServiceSupport implements DataFormat, DataFormatName { 034 035 @Override 036 public String getDataFormatName() { 037 return "gzip"; 038 } 039 040 public void marshal(final Exchange exchange, final Object graph, final OutputStream stream) throws Exception { 041 InputStream is = exchange.getContext().getTypeConverter().mandatoryConvertTo(InputStream.class, exchange, graph); 042 043 GZIPOutputStream zipOutput = new GZIPOutputStream(stream); 044 try { 045 IOHelper.copy(is, zipOutput); 046 } finally { 047 // must close all input streams 048 IOHelper.close(is, zipOutput); 049 } 050 } 051 052 public Object unmarshal(final Exchange exchange, final InputStream inputStream) throws Exception { 053 GZIPInputStream unzipInput = null; 054 055 OutputStreamBuilder osb = OutputStreamBuilder.withExchange(exchange); 056 try { 057 unzipInput = new GZIPInputStream(inputStream); 058 IOHelper.copy(unzipInput, osb); 059 return osb.build(); 060 } finally { 061 // must close all input streams 062 IOHelper.close(osb, unzipInput, inputStream); 063 } 064 } 065 066 @Override 067 protected void doStart() throws Exception { 068 // noop 069 } 070 071 @Override 072 protected void doStop() throws Exception { 073 // noop 074 } 075}