1 /*
2 * Copyright 2008-2013 smartics, Kronseder & Reiner GmbH
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package de.smartics.maven.issues.util;
17
18 import java.io.Serializable;
19 import java.util.Comparator;
20
21 import org.apache.maven.artifact.versioning.ArtifactVersion;
22
23 /**
24 * Inverts the natural order of the artifact version. Greater version numbers
25 * come first.
26 *
27 * @author <a href="mailto:robert.reiner@smartics.de">Robert Reiner</a>
28 * @version $Revision:591 $
29 */
30 public class InverseVersionComparator implements Comparator<ArtifactVersion>,
31 Serializable
32 {
33 // ********************************* Fields *********************************
34
35 // --- constants ------------------------------------------------------------
36
37 /**
38 * The class version identifier.
39 * <p>
40 * The value of this constant is {@value}.
41 */
42 private static final long serialVersionUID = 1L;
43
44 // --- members --------------------------------------------------------------
45
46 /**
47 * An instance for reuse.
48 */
49 public static final InverseVersionComparator INSTANCE =
50 new InverseVersionComparator();
51
52 // ****************************** Initializer *******************************
53
54 // ****************************** Constructors ******************************
55
56 /**
57 * Default constructor.
58 */
59 public InverseVersionComparator()
60 {
61 }
62
63 // ****************************** Inner Classes *****************************
64
65 // ********************************* Methods ********************************
66
67 // --- init -----------------------------------------------------------------
68
69 // --- get&set --------------------------------------------------------------
70
71 // --- business -------------------------------------------------------------
72
73 /**
74 * {@inheritDoc}
75 * <p>
76 * Returns the inverse natural order of the artifact version.
77 * </p>
78 */
79 @SuppressWarnings("unchecked")
80 public int compare(final ArtifactVersion o1, final ArtifactVersion o2)
81 {
82 return o2.compareTo(o1);
83 }
84
85 // --- object basics --------------------------------------------------------
86
87 }