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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  package org.apache.directory.mavibot.btree;
21  
22  
23  /**
24   * An abstract class used to store a modification done on a BTree.
25   *  
26   * @param <K> The key type
27   * @param <V> The value type
28   * 
29   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
30   */
31  /* No qualifier*/abstract class Modification<K, V> extends Tuple<K, V>
32  {
33      /** The byte used to define an Addition in the serialized journal */
34      public static final byte ADDITION = 0;
35  
36      /** The byte used to define a Deletion in the serialized journal */
37      public static final byte DELETION = 1;
38  
39  
40      /**
41       * Create a new Modification instance.
42       * 
43       * @param key The key being modified
44       * @param value The value being modified
45       */
46      protected Modification( K key, V value )
47      {
48          super( key, value );
49      }
50  }