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1   /*
2    *  Licensed to the Apache Software Foundation (ASF) under one
3    *  or more contributor license agreements.  See the NOTICE file
4    *  distributed with this work for additional information
5    *  regarding copyright ownership.  The ASF licenses this file
6    *  to you under the Apache License, Version 2.0 (the
7    *  "License"); you may not use this file except in compliance
8    *  with the License.  You may obtain a copy of the License at
9    *  
10   *    http://www.apache.org/licenses/LICENSE-2.0
11   *  
12   *  Unless required by applicable law or agreed to in writing,
13   *  software distributed under the License is distributed on an
14   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   *  KIND, either express or implied.  See the License for the
16   *  specific language governing permissions and limitations
17   *  under the License. 
18   *  
19   */
20  
21  package org.apache.directory.server.changepw.io;
22  
23  
24  import java.io.IOException;
25  import java.nio.ByteBuffer;
26  
27  import org.apache.directory.server.changepw.messages.ChangePasswordError;
28  import org.apache.directory.server.kerberos.shared.io.encoder.ErrorMessageEncoder;
29  import org.apache.directory.server.kerberos.shared.messages.ErrorMessage;
30  
31  
32  /**
33   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
34   * @version $Rev: 546375 $, $Date: 2007-06-12 06:05:00 +0200 (Di, 12 Jun 2007) $
35   */
36  public class ChangePasswordErrorEncoder
37  {
38      private static final int HEADER_LENGTH = 6;
39  
40  
41      /**
42       * Encodes a {@link ChangePasswordError} into a {@link ByteBuffer}.
43       *
44       * @param buf
45       * @param message
46       * @throws IOException
47       */
48      public void encode( ByteBuffer buf, ChangePasswordError message ) throws IOException
49      {
50          // Build error message bytes
51          ErrorMessage errorMessage = message.getErrorMessage();
52          ErrorMessageEncoder errorEncoder = new ErrorMessageEncoder();
53          byte[] errorBytes = errorEncoder.encode( errorMessage );
54  
55          short messageLength = ( short ) ( HEADER_LENGTH + errorBytes.length );
56          buf.putShort( messageLength );
57  
58          short protocolVersion = 1;
59          buf.putShort( protocolVersion );
60  
61          short zeroIndicatesError = 0;
62          buf.putShort( zeroIndicatesError );
63  
64          buf.put( errorBytes );
65      }
66  }