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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.dns.messages;
22  
23  
24  import org.apache.directory.server.dns.util.EnumConverter;
25  import org.apache.directory.server.dns.util.ReverseEnumMap;
26  
27  
28  /**
29   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
30   * @version $Rev: 547524 $, $Date: 2007-06-15 06:42:26 +0200 (Fr, 15 Jun 2007) $
31   */
32  public enum OpCode implements EnumConverter<Byte>
33  {
34      /** Standard query */
35      QUERY(0),
36  
37      /** Inverse query */
38      IQUERY(1),
39  
40      /** Server status request */
41      STATUS(2),
42  
43      /** Zone transfer notification */
44      NOTIFY(4),
45  
46      /** Dynamic update message */
47      UPDATE(5);
48  
49      private static ReverseEnumMap<Byte, OpCode> map = new ReverseEnumMap<Byte, OpCode>( OpCode.class );
50  
51      private final byte value;
52  
53  
54      private OpCode( int value )
55      {
56          this.value = ( byte ) value;
57      }
58  
59  
60      public Byte convert()
61      {
62          return this.value;
63      }
64  
65  
66      /**
67       * Converts an ordinal value into an {@link OpCode}.
68       *
69       * @param value
70       * @return The {@link OpCode}.
71       */
72      public static OpCode convert( byte value )
73      {
74          return map.get( value );
75      }
76  }