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.comparator;
21
22
23 import java.util.Comparator;
24
25
26 /**
27 * Compares shorts
28 *
29 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
30 */
31 public class ShortComparator implements Comparator<Short>
32 {
33 /** A static instance of a ShortComparator */
34 public static final ShortComparator INSTANCE = new ShortComparator();
35
36 /**
37 * A private constructor of the ShortComparator class
38 */
39 private ShortComparator()
40 {
41 }
42
43
44 /**
45 * Compare two shorts.
46 *
47 * @param short1 First short
48 * @param short2 Second short
49 * @return 1 if short1 > short2, 0 if short1 == short2, -1 if short1 < short2
50 */
51 public int compare( Short short1, Short short2 )
52 {
53 if ( short1 == short2 )
54 {
55 return 0;
56 }
57
58 if ( short1 == null )
59 {
60 if ( short2 == null )
61 {
62 return 0;
63 }
64 else
65 {
66 return -1;
67 }
68 }
69 else
70 {
71 if ( short2 == null )
72 {
73 return 1;
74 }
75 else
76 {
77 if ( short1 < short2 )
78 {
79 return -1;
80 }
81 else if ( short1 > short2 )
82 {
83 return 1;
84 }
85 else
86 {
87 return 0;
88 }
89 }
90 }
91 }
92 }