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 package org.eclipse.aether.util.version;
20
21 import org.eclipse.aether.version.InvalidVersionSpecificationException;
22
23 /**
24 * A version scheme using a generic version syntax and common sense sorting.
25 * <p>
26 * This scheme accepts versions of any form, interpreting a version as a sequence of numeric and alphabetic segments.
27 * The characters '-', '_', and '.' as well as the mere transitions from digit to letter and vice versa delimit the
28 * version segments. Delimiters are treated as equivalent.
29 * </p>
30 * <p>
31 * Numeric segments are compared mathematically, alphabetic segments are compared lexicographically and
32 * case-insensitively. However, the following qualifier strings are recognized and treated specially: "alpha" = "a" <
33 * "beta" = "b" < "milestone" = "m" < "cr" = "rc" < "snapshot" < "final" = "ga" < "sp". All of those
34 * well-known qualifiers are considered smaller/older than other strings. An empty segment/string is equivalent to 0.
35 * </p>
36 * <p>
37 * In addition to the above mentioned qualifiers, the tokens "min" and "max" may be used as final version segment to
38 * denote the smallest/greatest version having a given prefix. For example, "1.2.min" denotes the smallest version in
39 * the 1.2 line, "1.2.max" denotes the greatest version in the 1.2 line. A version range of the form "[M.N.*]" is short
40 * for "[M.N.min, M.N.max]".
41 * </p>
42 * <p>
43 * Numbers and strings are considered incomparable against each other. Where version segments of different kind would
44 * collide, comparison will instead assume that the previous segments are padded with trailing 0 or "ga" segments,
45 * respectively, until the kind mismatch is resolved, e.g. "1-alpha" = "1.0.0-alpha" < "1.0.1-ga" = "1.0.1".
46 * </p>
47 */
48 public final class GenericVersionScheme extends VersionSchemeSupport {
49 @Override
50 public GenericVersion parseVersion(final String version) throws InvalidVersionSpecificationException {
51 return new GenericVersion(version);
52 }
53
54 /**
55 * A handy main method that behaves similarly like maven-artifact ComparableVersion is, to make possible test
56 * and possibly compare differences between the two.
57 * <p>
58 * To check how "1.2.7" compares to "1.2-SNAPSHOT", for example, you can issue
59 * <pre>jbang --main=org.eclipse.aether.util.version.GenericVersionScheme org.apache.maven.resolver:maven-resolver-util:1.9.18 "1.2.7" "1.2-SNAPSHOT"</pre>
60 * command to command line, output is very similar to that of ComparableVersion on purpose.
61 */
62 public static void main(String... args) {
63 System.out.println(
64 "Display parameters as parsed by Maven Resolver 'generic' scheme (in canonical form and as a list of tokens)"
65 + " and comparison result:");
66 if (args.length == 0) {
67 return;
68 }
69
70 GenericVersion prev = null;
71 int i = 1;
72 for (String version : args) {
73 GenericVersion c = new GenericVersion(version);
74
75 if (prev != null) {
76 int compare = prev.compareTo(c);
77 System.out.println(
78 " " + prev + ' ' + ((compare == 0) ? "==" : ((compare < 0) ? "<" : ">")) + ' ' + version);
79 }
80
81 System.out.println((i++) + ". " + version + " -> " + c.asString() + "; tokens: " + c.asItems());
82
83 prev = c;
84 }
85 }
86 }