1 package org.apache.maven.shared.dependency.graph.internal;
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 java.util.Objects;
23
24 import org.apache.maven.project.MavenProject;
25
26 /**
27 * Uniquely defines an artifact by groupId, artifactId and version.
28 */
29 final class ArtifactKey
30 {
31 private final String groupId;
32 private final String artifactId;
33 private final String version;
34 private final int hashCode;
35
36 ArtifactKey( String groupId, String artifactId, String version )
37 {
38 this.groupId = groupId;
39 this.artifactId = artifactId;
40 this.version = version;
41 this.hashCode = Objects.hash( groupId, artifactId, version );
42 }
43
44 ArtifactKey( MavenProject project )
45 {
46 this( project.getGroupId(), project.getArtifactId(), project.getVersion() );
47 }
48
49 @Override
50 public boolean equals( Object o )
51 {
52 if ( this == o )
53 {
54 return true;
55 }
56
57 if ( !( o instanceof ArtifactKey ) )
58 {
59 return false;
60 }
61
62 ArtifactKey that = (ArtifactKey) o;
63
64 return artifactId.equals( that.artifactId ) && groupId.equals( that.groupId ) && version.equals( that.version );
65 }
66
67 @Override
68 public int hashCode()
69 {
70 return hashCode;
71 }
72 }