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1   /*
2    * ====================================================================
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with the License.  You may obtain a copy of the License at
10   *
11   *   http://www.apache.org/licenses/LICENSE-2.0
12   *
13   * Unless required by applicable law or agreed to in writing,
14   * software distributed under the License is distributed on an
15   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16   * KIND, either express or implied.  See the License for the
17   * specific language governing permissions and limitations
18   * under the License.
19   * ====================================================================
20   *
21   * This software consists of voluntary contributions made by many
22   * individuals on behalf of the Apache Software Foundation.  For more
23   * information on the Apache Software Foundation, please see
24   * <http://www.apache.org/>.
25   *
26   */
27  
28  package org.apache.http.nio;
29  
30  import java.io.IOException;
31  import java.nio.ByteBuffer;
32  import java.nio.channels.WritableByteChannel;
33  
34  import org.apache.http.nio.ContentEncoder;
35  
36  /**
37   * A {@link WritableByteChannel} that delegates to a {@link ContentEncoder}.
38   * Attempts to close this channel are ignored, and {@link #isOpen} always
39   * returns <code>true</code>.
40   *
41   * @since 4.0
42   */
43  public class ContentEncoderChannel implements WritableByteChannel {
44  
45      private final ContentEncoder contentEncoder;
46  
47      public ContentEncoderChannel(ContentEncoder contentEncoder) {
48          this.contentEncoder = contentEncoder;
49      }
50  
51      public int write(ByteBuffer src) throws IOException {
52          return contentEncoder.write(src);
53      }
54  
55      public void close() {}
56  
57      public boolean isOpen() {
58          return true;
59      }
60  
61  }