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.managed;
21
22
23 import java.util.List;
24
25 import org.apache.directory.mavibot.btree.Tuple;
26
27
28 /**
29 * The result of a delete operation, when the child has not been merged, and when
30 * we have borrowed an element from the left sibling. It contains the
31 * reference to the modified page, and the removed element.
32 *
33 * @param <K> The type for the Key
34 * @param <V> The type for the stored value
35
36 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
37 */
38 /* No qualifier */class BorrowedFromLeftResult<K, V> extends AbstractBorrowedFromSiblingResult<K, V>
39 {
40 /**
41 * The default constructor for BorrowedFromLeftResult.
42 *
43 * @param modifiedPage The modified page
44 * @param modifiedSibling The modified sibling
45 * @param removedElement The removed element (can be null if the key wasn't present in the tree)
46 */
47 /* No qualifier */BorrowedFromLeftResult( Page<K, V> modifiedPage, Page<K, V> modifiedSibling,
48 Tuple<K, V> removedElement )
49 {
50 super( modifiedPage, modifiedSibling, removedElement, AbstractBorrowedFromSiblingResult.SiblingPosition.LEFT );
51 }
52
53
54 /**
55 * A constructor for BorrowedFromLeftResult which takes a list of copied pages.
56 *
57 * @param copiedPages the list of copied pages
58 * @param modifiedPage The modified page
59 * @param modifiedSibling The modified sibling
60 * @param removedElement The removed element (can be null if the key wasn't present in the tree)
61 */
62 /* No qualifier */BorrowedFromLeftResult( List<Page<K, V>> copiedPages, Page<K, V> modifiedPage,
63 Page<K, V> modifiedSibling,
64 Tuple<K, V> removedElement )
65 {
66 super( copiedPages, modifiedPage, modifiedSibling, removedElement,
67 AbstractBorrowedFromSiblingResult.SiblingPosition.LEFT );
68 }
69
70
71 /**
72 * @see Object#toString()
73 */
74 public String toString()
75 {
76 StringBuilder sb = new StringBuilder();
77
78 sb.append( "Borrowed from left" );
79 sb.append( super.toString() );
80
81 return sb.toString();
82 }
83 }