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.ByteArrayOutputStream; 020import java.io.InputStream; 021import java.io.OutputStream; 022import java.util.zip.GZIPInputStream; 023import java.util.zip.GZIPOutputStream; 024 025import org.apache.camel.Exchange; 026import org.apache.camel.spi.DataFormat; 027import org.apache.camel.util.IOHelper; 028 029/** 030 * GZip {@link org.apache.camel.spi.DataFormat} for reading/writing data using gzip. 031 */ 032public class GzipDataFormat implements DataFormat { 033 034 public void marshal(Exchange exchange, Object graph, OutputStream stream) throws Exception { 035 InputStream is = exchange.getContext().getTypeConverter().mandatoryConvertTo(InputStream.class, exchange, graph); 036 037 GZIPOutputStream zipOutput = new GZIPOutputStream(stream); 038 try { 039 IOHelper.copy(is, zipOutput); 040 } finally { 041 // must close all input streams 042 IOHelper.close(is, zipOutput); 043 } 044 } 045 046 public Object unmarshal(Exchange exchange, InputStream stream) throws Exception { 047 InputStream is = exchange.getIn().getMandatoryBody(InputStream.class); 048 GZIPInputStream unzipInput = null; 049 050 // Create an expandable byte array to hold the inflated data 051 ByteArrayOutputStream bos = new ByteArrayOutputStream(); 052 try { 053 unzipInput = new GZIPInputStream(is); 054 IOHelper.copy(unzipInput, bos); 055 return bos.toByteArray(); 056 } finally { 057 // must close all input streams 058 IOHelper.close(unzipInput, is); 059 } 060 } 061 062}