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/*
* $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/entity/AbstractHttpEntity.java $
* $Revision: 496070 $
* $Date: 2007-01-14 04:18:34 -0800 (Sun, 14 Jan 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.entity;
import java.io.IOException;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.message.BasicHeader;
import org.apache.http.protocol.HTTP;
/**
* Abstract base class for entities.
* Provides the commonly used attributes for streamed and self-contained
* implementations of {@link HttpEntity HttpEntity}.
*
* @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
*
* @version $Revision: 496070 $
*
* @since 4.0
*/
public abstract class AbstractHttpEntity implements HttpEntity {
/**
* The Content-Type header.
* Returned by {@link #getContentType getContentType},
* unless that method is overridden.
*/
protected Header contentType;
/**
* The Content-Encoding header.
* Returned by {@link #getContentEncoding getContentEncoding},
* unless that method is overridden.
*/
protected Header contentEncoding;
/**
* The 'chunked' flag.
* Returned by {@link #isChunked isChunked},
* unless that method is overridden.
*/
protected boolean chunked;
/**
* Protected default constructor.
* The attributes of the created object remain
* <code>null</code> and <code>false</code>, respectively.
*/
protected AbstractHttpEntity() {
super();
}
/**
* Obtains the Content-Type header.
* The default implementation returns the value of the
* {@link #contentType contentType} attribute.
*
* @return the Content-Type header, or <code>null</code>
*/
public Header getContentType() {
return this.contentType;
}
/**
* Obtains the Content-Encoding header.
* The default implementation returns the value of the
* {@link #contentEncoding contentEncoding} attribute.
*
* @return the Content-Encoding header, or <code>null</code>
*/
public Header getContentEncoding() {
return this.contentEncoding;
}
/**
* Obtains the 'chunked' flag.
* The default implementation returns the value of the
* {@link #chunked chunked} attribute.
*
* @return the 'chunked' flag
*/
public boolean isChunked() {
return this.chunked;
}
/**
* Specifies the Content-Type header.
* The default implementation sets the value of the
* {@link #contentType contentType} attribute.
*
* @param contentType the new Content-Encoding header, or
* <code>null</code> to unset
*/
public void setContentType(final Header contentType) {
this.contentType = contentType;
}
/**
* Specifies the Content-Type header, as a string.
* The default implementation calls
* {@link #setContentType(Header) setContentType(Header)}.
*
* @param ctString the new Content-Type header, or
* <code>null</code> to unset
*/
public void setContentType(final String ctString) {
Header h = null;
if (ctString != null) {
h = new BasicHeader(HTTP.CONTENT_TYPE, ctString);
}
setContentType(h);
}
/**
* Specifies the Content-Encoding header.
* The default implementation sets the value of the
* {@link #contentEncoding contentEncoding} attribute.
*
* @param contentEncoding the new Content-Encoding header, or
* <code>null</code> to unset
*/
public void setContentEncoding(final Header contentEncoding) {
this.contentEncoding = contentEncoding;
}
/**
* Specifies the Content-Encoding header, as a string.
* The default implementation calls
* {@link #setContentEncoding(Header) setContentEncoding(Header)}.
*
* @param ceString the new Content-Encoding header, or
* <code>null</code> to unset
*/
public void setContentEncoding(final String ceString) {
Header h = null;
if (ceString != null) {
h = new BasicHeader(HTTP.CONTENT_ENCODING, ceString);
}
setContentEncoding(h);
}
/**
* Specifies the 'chunked' flag.
* The default implementation sets the value of the
* {@link #chunked chunked} attribute.
*
* @param b the new 'chunked' flag
*/
public void setChunked(boolean b) {
this.chunked = b;
}
/**
* Does not consume anything.
* The default implementation does nothing if
* {@link HttpEntity#isStreaming isStreaming}
* returns <code>false</code>, and throws an exception
* if it returns <code>true</code>.
* This removes the burden of implementing
* an empty method for non-streaming entities.
*
* @throws IOException in case of an I/O problem
* @throws UnsupportedOperationException
* if a streaming subclass does not override this method
*/
public void consumeContent()
throws IOException, UnsupportedOperationException{
if (isStreaming()) {
throw new UnsupportedOperationException
("streaming entity does not implement consumeContent()");
}
} // consumeContent
} // class AbstractHttpEntity
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