1 /* 2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/impl/entity/EntitySerializer.java $ 3 * $Revision: 560343 $ 4 * $Date: 2007-07-27 11:18:19 -0700 (Fri, 27 Jul 2007) $ 5 * 6 * ==================================================================== 7 * Licensed to the Apache Software Foundation (ASF) under one 8 * or more contributor license agreements. See the NOTICE file 9 * distributed with this work for additional information 10 * regarding copyright ownership. The ASF licenses this file 11 * to you under the Apache License, Version 2.0 (the 12 * "License"); you may not use this file except in compliance 13 * with the License. You may obtain a copy of the License at 14 * 15 * http://www.apache.org/licenses/LICENSE-2.0 16 * 17 * Unless required by applicable law or agreed to in writing, 18 * software distributed under the License is distributed on an 19 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 20 * KIND, either express or implied. See the License for the 21 * specific language governing permissions and limitations 22 * under the License. 23 * ==================================================================== 24 * 25 * This software consists of voluntary contributions made by many 26 * individuals on behalf of the Apache Software Foundation. For more 27 * information on the Apache Software Foundation, please see 28 * <http://www.apache.org/>. 29 * 30 */ 31 32 package org.apache.http.impl.entity; 33 34 import java.io.IOException; 35 import java.io.OutputStream; 36 37 import org.apache.http.HttpEntity; 38 import org.apache.http.HttpException; 39 import org.apache.http.HttpMessage; 40 import org.apache.http.entity.ContentLengthStrategy; 41 import org.apache.http.impl.io.ChunkedOutputStream; 42 import org.apache.http.impl.io.ContentLengthOutputStream; 43 import org.apache.http.impl.io.IdentityOutputStream; 44 import org.apache.http.io.SessionOutputBuffer; 45 46 /** 47 * Default implementation of an entity serializer. 48 * <p> 49 * This entity serializer currently supports only "chunked" and "identitiy" transfer-coding</a> 50 * </p> 51 * 52 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> 53 * 54 * @version $Revision: 560343 $ 55 * 56 * @since 4.0 57 */ 58 public class EntitySerializer { 59 60 private final ContentLengthStrategy lenStrategy; 61 62 public EntitySerializer(final ContentLengthStrategy lenStrategy) { 63 super(); 64 if (lenStrategy == null) { 65 throw new IllegalArgumentException("Content length strategy may not be null"); 66 } 67 this.lenStrategy = lenStrategy; 68 } 69 70 protected OutputStream doSerialize( 71 final SessionOutputBuffer outbuffer, 72 final HttpMessage message) throws HttpException, IOException { 73 long len = this.lenStrategy.determineLength(message); 74 if (len == ContentLengthStrategy.CHUNKED) { 75 return new ChunkedOutputStream(outbuffer); 76 } else if (len == ContentLengthStrategy.IDENTITY) { 77 return new IdentityOutputStream(outbuffer); 78 } else { 79 return new ContentLengthOutputStream(outbuffer, len); 80 } 81 } 82 83 public void serialize( 84 final SessionOutputBuffer outbuffer, 85 final HttpMessage message, 86 final HttpEntity entity) throws HttpException, IOException { 87 if (outbuffer == null) { 88 throw new IllegalArgumentException("Session output buffer may not be null"); 89 } 90 if (message == null) { 91 throw new IllegalArgumentException("HTTP message may not be null"); 92 } 93 if (entity == null) { 94 throw new IllegalArgumentException("HTTP entity may not be null"); 95 } 96 OutputStream outstream = doSerialize(outbuffer, message); 97 entity.writeTo(outstream); 98 outstream.close(); 99 } 100 101 } 102
