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 * The result of an delete operation, when the key to delete is not present in the tree.
25 *
26 * @param <K> The type for the Key
27 * @param <V> The type for the stored value
28
29 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
30 */
31 /* No qualifier*/class NotPresentResult<K, V> extends AbstractResult<K, V> implements DeleteResult<K, V>
32 {
33 /** The unique instance for this class */
34 @SuppressWarnings("rawtypes")
35 public static final NotPresentResult NOT_PRESENT = new NotPresentResult();
36
37
38 /**
39 * A private void constructor, as we won't have any other instance.
40 */
41 private NotPresentResult()
42 {
43 // Do nothing
44 }
45
46
47 /**
48 * {@inheritDoc}
49 */
50 public Page<K, V> getModifiedPage()
51 {
52 return null;
53 }
54
55
56 /**
57 * {@inheritDoc}
58 */
59 public Tuple<K, V> getRemovedElement()
60 {
61 return null;
62 }
63
64
65 /**
66 * {@inheritDoc}
67 */
68 public K getNewLeftMost()
69 {
70 return null;
71 }
72 }