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
25 /**
26 * The result of an delete operation, when the key to delete is not present in the tree.
27 *
28 * @param <K> The type for the Key
29 * @param <V> The type for the stored value
30
31 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
32 */
33 public class NotPresentResult<K, V> extends AbstractResult<K, V> implements DeleteResult<K, V>
34 {
35 /** The unique instance for this class */
36 @SuppressWarnings("rawtypes")
37 public static final NotPresentResult NOT_PRESENT = new NotPresentResult();
38
39
40 /**
41 * A private void constructor, as we won't have any other instance.
42 */
43 private NotPresentResult()
44 {
45 // Do nothing
46 }
47
48
49 /**
50 * {@inheritDoc}
51 */
52 public Page<K, V> getModifiedPage()
53 {
54 return null;
55 }
56
57
58 /**
59 * {@inheritDoc}
60 */
61 public Tuple<K, V> getRemovedElement()
62 {
63 return null;
64 }
65
66
67 /**
68 * {@inheritDoc}
69 */
70 public K getNewLeftMost()
71 {
72 return null;
73 }
74 }