Home | History | Annotate | Download | only in entity 
      1 /*
      2  * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/entity/EntityTemplate.java $
      3  * $Revision: 496070 $
      4  * $Date: 2007-01-14 04:18:34 -0800 (Sun, 14 Jan 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.entity;
     33 
     34 import java.io.IOException;
     35 import java.io.InputStream;
     36 import java.io.OutputStream;
     37 
     38 /**
     39  * Entity that delegates the process of content generation to an abstract
     40  * content producer.
     41  *
     42  * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
     43  *
     44  * @version $Revision: 496070 $
     45  *
     46  * @since 4.0
     47  */
     48 public class EntityTemplate extends AbstractHttpEntity {
     49 
     50     private final ContentProducer contentproducer;
     51 
     52     public EntityTemplate(final ContentProducer contentproducer) {
     53         super();
     54         if (contentproducer == null) {
     55             throw new IllegalArgumentException("Content producer may not be null");
     56         }
     57         this.contentproducer = contentproducer;
     58     }
     59 
     60     public long getContentLength() {
     61         return -1;
     62     }
     63 
     64     public InputStream getContent() {
     65         throw new UnsupportedOperationException("Entity template does not implement getContent()");
     66     }
     67 
     68     public boolean isRepeatable() {
     69         return true;
     70     }
     71 
     72     public void writeTo(final OutputStream outstream) throws IOException {
     73         if (outstream == null) {
     74             throw new IllegalArgumentException("Output stream may not be null");
     75         }
     76         this.contentproducer.writeTo(outstream);
     77     }
     78 
     79     public boolean isStreaming() {
     80         return true;
     81     }
     82 
     83     public void consumeContent() throws IOException {
     84     }
     85 
     86 }
     87