/*
* $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/impl/entity/EntityDeserializer.java $
* $Revision: 560358 $
* $Date: 2007-07-27 12:30:42 -0700 (Fri, 27 Jul 2007) $
*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.http.impl.entity;
import java.io.IOException;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpException;
import org.apache.http.HttpMessage;
import org.apache.http.entity.BasicHttpEntity;
import org.apache.http.entity.ContentLengthStrategy;
import org.apache.http.impl.io.ChunkedInputStream;
import org.apache.http.impl.io.ContentLengthInputStream;
import org.apache.http.impl.io.IdentityInputStream;
import org.apache.http.io.SessionInputBuffer;
import org.apache.http.protocol.HTTP;
/**
* Default implementation of an entity deserializer.
* <p>
* This entity deserializer currently supports only "chunked" and "identitiy" transfer-coding</a>
* </p>
*
* @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
*
* @version $Revision: 560358 $
*
* @since 4.0
*/
public class EntityDeserializer {
private final ContentLengthStrategy lenStrategy;
public EntityDeserializer(final ContentLengthStrategy lenStrategy) {
super();
if (lenStrategy == null) {
throw new IllegalArgumentException("Content length strategy may not be null");
}
this.lenStrategy = lenStrategy;
}
protected BasicHttpEntity doDeserialize(
final SessionInputBuffer inbuffer,
final HttpMessage message) throws HttpException, IOException {
BasicHttpEntity entity = new BasicHttpEntity();
long len = this.lenStrategy.determineLength(message);
if (len == ContentLengthStrategy.CHUNKED) {
entity.setChunked(true);
entity.setContentLength(-1);
entity.setContent(new ChunkedInputStream(inbuffer));
} else if (len == ContentLengthStrategy.IDENTITY) {
entity.setChunked(false);
entity.setContentLength(-1);
entity.setContent(new IdentityInputStream(inbuffer));
} else {
entity.setChunked(false);
entity.setContentLength(len);
entity.setContent(new ContentLengthInputStream(inbuffer, len));
}
Header contentTypeHeader = message.getFirstHeader(HTTP.CONTENT_TYPE);
if (contentTypeHeader != null) {
entity.setContentType(contentTypeHeader);
}
Header contentEncodingHeader = message.getFirstHeader(HTTP.CONTENT_ENCODING);
if (contentEncodingHeader != null) {
entity.setContentEncoding(contentEncodingHeader);
}
return entity;
}
public HttpEntity deserialize(
final SessionInputBuffer inbuffer,
final HttpMessage message) throws HttpException, IOException {
if (inbuffer == null) {
throw new IllegalArgumentException("Session input buffer may not be null");
}
if (message == null) {
throw new IllegalArgumentException("HTTP message may not be null");
}
return doDeserialize(inbuffer, message);
}
}