1 package org.apache.maven.plugins.javadoc;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import org.codehaus.plexus.util.StringUtils;
23
24 /**
25 * Once the plugin requires Java9, this class can be replaced with java.lang.Runtime.Version
26 * <p>
27 * <strong>Note: </strong> Ensure the methods match, although parse+compareTo+toString should be enough.
28 * </p>
29 *
30 *
31 * @author Robert Scholte
32 * @since 3.0.0
33 */
34 public class JavadocVersion implements Comparable<JavadocVersion>
35 {
36 private String rawVersion;
37
38 private JavadocVersion( String rawVersion )
39 {
40 if ( StringUtils.isEmpty( rawVersion ) )
41 {
42 throw new IllegalArgumentException( "The rawVersion could not be null." );
43 }
44 this.rawVersion = rawVersion;
45 }
46
47 /**
48 * Parser only the version-scheme.
49 *
50 * @param s the version string
51 * @return the version wrapped in a JavadocVersion
52 */
53 static JavadocVersion parse( String s )
54 {
55 return new JavadocVersion( s );
56 }
57
58 @Override
59 public int compareTo( JavadocVersion other )
60 {
61 String[] thisSegments = this.rawVersion.split( "\\." );
62 String[] otherSegments = other.rawVersion.split( "\\." );
63
64 int minSegments = Math.min( thisSegments.length, otherSegments.length );
65
66 for ( int index = 0; index < minSegments; index++ )
67 {
68 int thisValue = Integer.parseInt( thisSegments[index] );
69 int otherValue = Integer.parseInt( otherSegments[index] );
70
71 int compareValue = Integer.compare( thisValue, otherValue );
72
73 if ( compareValue != 0 )
74 {
75 return compareValue;
76 }
77 }
78
79 return ( thisSegments.length - otherSegments.length );
80 }
81
82 @Override
83 public String toString()
84 {
85 return rawVersion;
86 }
87 }