1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/**
* Copyright 2012 Julien Eluard
* This project includes software developed by Julien Eluard: https://github.com/jeluard/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.semver;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
import org.apache.commons.lang.StringUtils;
/**
*
* Version following semantic defined by <a href="http://semver.org/">Semantic Versioning</a> document.
*
*/
@Immutable
public final class Version implements Comparable<Version> {
/**
* {@link Version} element. From most meaningful to less meaningful.
*/
public enum Element {
MAJOR, MINOR, PATCH, SPECIAL;
}
private static final String FORMAT = "(\\d+)\\.(\\d+)(?:\\.)?(\\d*)(\\.|-|\\+)?([0-9A-Za-z-.]*)?";
private static final Pattern PATTERN = Pattern.compile(Version.FORMAT);
private static final String SNAPSHOT_VERSION_SUFFIX = "-SNAPSHOT";
private final int major;
private final int minor;
private final int patch;
private final String separator;
private final String special;
public Version(@Nonnegative final int major, @Nonnegative final int minor, @Nonnegative final int patch) {
this(major, minor, patch, null, null);
}
public Version(@Nonnegative final int major, @Nonnegative final int minor, @Nonnegative final int patch, @Nullable final String separator, @Nullable final String special) {
if (major < 0) {
throw new IllegalArgumentException(Element.MAJOR+" must be positive");
}
if (minor < 0) {
throw new IllegalArgumentException(Element.MINOR+" must be positive");
}
if (patch < 0) {
throw new IllegalArgumentException(Element.PATCH+" must be positive");
}
this.major = major;
this.minor = minor;
this.patch = patch;
this.separator = separator;
this.special = special;
}
/**
*
* Creates a Version from a string representation. Must match Version#FORMAT.
*
* @param version
* @return
*/
public static Version parse(@Nonnull final String version) {
final Matcher matcher = Version.PATTERN.matcher(version);
if (!matcher.matches()) {
throw new IllegalArgumentException("<"+version+"> does not match format "+Version.FORMAT);
}
final int major = Integer.valueOf(matcher.group(1));
final int minor = Integer.valueOf(matcher.group(2));
final int patch;
final String patchMatch = matcher.group(3);
if (StringUtils.isNotEmpty(patchMatch)) {
patch = Integer.valueOf(patchMatch);
} else {
patch = 0;
}
final String separator = matcher.group(4);
final String special = matcher.group(5);
return new Version(major, minor, patch, separator, "".equals(special) ? null : special);
}
/**
* @param type
* @return next {@link Version} regarding specified {@link Version.Element}
*/
public Version next(@Nonnull final Version.Element element) {
if (element == null) {
throw new IllegalArgumentException("null element");
}
switch (element) {
case MAJOR:
return new Version(this.major+1, 0, 0);
case MINOR:
return new Version(this.major, this.minor+1, 0);
case PATCH:
return new Version(this.major, this.minor, this.patch+1);
default:
throw new IllegalArgumentException("Unknown element <"+element+">");
}
}
public boolean isInDevelopment() {
return this.major == 0;
}
public boolean isStable() {
return !isInDevelopment();
}
public boolean isSnapshot() {
return this.special != null && this.special.endsWith(Version.SNAPSHOT_VERSION_SUFFIX);
}
@Override
public int hashCode() {
int hash = 5;
hash = 43 * hash + this.major;
hash = 43 * hash + this.minor;
hash = 43 * hash + this.patch;
hash = 43 * hash + (this.special != null ? this.special.hashCode() : 0);
return hash;
}
@Override
public boolean equals(@Nullable final Object object) {
if (!(object instanceof Version)) {
return false;
}
final Version other = (Version) object;
if (other.major != this.major || other.minor != this.minor || other.patch != this.patch) {
return false;
}
return (this.special == null) ? other.special == null : this.special.equals(other.special);
}
@Override
public int compareTo(final Version other) {
if (equals(other)) {
return 0;
}
if (this.major < other.major) {
return -1;
} else if (this.major == other.major) {
if (this.minor < other.minor) {
return -1;
} else if (this.minor == other.minor) {
if (this.patch < other.patch) {
return -1;
} else if (this.special != null && other.special != null) {
return this.special.compareTo(other.special);
} else if (other.special != null) {
return -1;
} else if (this.special != null) {
return 1;
} // else handled by previous equals check
}
}
return 1;
}
@Override
public String toString() {
final StringBuilder builder = new StringBuilder();
builder.append(this.major).append(".").append(this.minor).append(".").append(this.patch);
if (this.separator != null) {
builder.append(this.separator);
}
if (this.special != null) {
builder.append(this.special);
}
return builder.toString();
}
}
|
