1 package org.codehaus.modello.model;
2
3 /*
4 * Copyright (c) 2004, Codehaus.org
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy of
7 * this software and associated documentation files (the "Software"), to deal in
8 * the Software without restriction, including without limitation the rights to
9 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
10 * of the Software, and to permit persons to whom the Software is furnished to do
11 * so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in all
14 * copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24
25 /**
26 * A version range. Can be of 3 forms:<ul>
27 * <li><code>x.y.z</code>: a range of only one precise version,</li>
28 * <li><code>x.y.z<b>+</b></code>: a range starting form a precise version (included), without upper limit,</li>
29 * <li><code>x.y.z<b>/</b>i.j.k</code>: a range from one version to another (both included).</li>
30 * </ul>
31 * @author <a href="mailto:evenisse@codehaus.org">Emmanuel Venisse</a>
32 */
33 public class VersionRange {
34 private static final String VERSION_SEPARATOR = "/";
35
36 private Version fromVersion;
37
38 private Version toVersion;
39
40 public VersionRange(String versionRange) {
41 if (versionRange.endsWith("+")) {
42 fromVersion = new Version(versionRange.substring(0, versionRange.length() - 1));
43
44 toVersion = Version.INFINITE;
45 } else if (versionRange.indexOf(VERSION_SEPARATOR) > 0 && !versionRange.endsWith(VERSION_SEPARATOR)) {
46 int pos = versionRange.indexOf(VERSION_SEPARATOR);
47
48 fromVersion = new Version(versionRange.substring(0, pos));
49
50 toVersion = new Version(versionRange.substring(pos + 1));
51 } else {
52 fromVersion = new Version(versionRange);
53
54 toVersion = new Version(versionRange);
55 }
56 }
57
58 public VersionRange(Version version) {
59 fromVersion = version;
60
61 toVersion = version;
62 }
63
64 public Version getFromVersion() {
65 return fromVersion;
66 }
67
68 public Version getToVersion() {
69 return toVersion;
70 }
71
72 public boolean isToInfinite() {
73 return toVersion == Version.INFINITE;
74 }
75
76 // ----------------------------------------------------------------------
77 // Object overrides
78 // ----------------------------------------------------------------------
79
80 public int hashCode() {
81 return fromVersion.hashCode() + toVersion.hashCode();
82 }
83
84 public boolean equals(Object obj) {
85 if (!(obj instanceof VersionRange)) {
86 return false;
87 }
88
89 VersionRange other = (VersionRange) obj;
90
91 return fromVersion.equals(other.fromVersion) && toVersion.equals(other.toVersion);
92 }
93
94 public String toString() {
95 if (fromVersion.equals(toVersion)) {
96 return fromVersion.toString("", ".");
97 } else if (toVersion.equals(Version.INFINITE)) {
98 return fromVersion.toString("", ".") + "+";
99 } else {
100 return "[" + fromVersion.toString("", ".") + " => " + toVersion.toString("", ".") + "]";
101 }
102 }
103 }