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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  /**
35   * A {@link WritableByteChannel} that delegates to a {@link ContentEncoder}.
36   * Attempts to close this channel are ignored, and {@link #isOpen} always
37   * returns <code>true</code>.
38   *
39   * @since 4.0
40   */
41  public class ContentEncoderChannel implements WritableByteChannel {
42  
43      private final ContentEncoder contentEncoder;
44  
45      public ContentEncoderChannel(final ContentEncoder contentEncoder) {
46          this.contentEncoder = contentEncoder;
47      }
48  
49      public int write(final ByteBuffer src) throws IOException {
50          return contentEncoder.write(src);
51      }
52  
53      public void close() {}
54  
55      public boolean isOpen() {
56          return true;
57      }
58  
59  }