1 package org.apache.maven.repository;
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.ArrayList;
23 import java.util.List;
24
25 /**
26 * MetadataGraph node - as it's a directed graph - holds adjacency lists for incident and exident nodes
27 *
28 * @author Oleg Gusakov
29 * @version $Id: MetadataGraphNode.java 958295 2010-06-26 23:16:18Z hboutemy $
30 *
31 */
32 public class MetadataGraphNode
33 {
34 /** node payload */
35 MavenArtifactMetadata metadata;
36
37 /** nodes, incident to this (depend on me) */
38 List<MetadataGraphNode> inNodes;
39
40 /** nodes, exident to this (I depend on) */
41 List<MetadataGraphNode> exNodes;
42
43 public MetadataGraphNode()
44 {
45 inNodes = new ArrayList<MetadataGraphNode>(4);
46 exNodes = new ArrayList<MetadataGraphNode>(8);
47 }
48
49 public MetadataGraphNode( MavenArtifactMetadata metadata )
50 {
51 this();
52 this.metadata = metadata;
53 }
54
55 public MetadataGraphNode addIncident( MetadataGraphNode node )
56 {
57 inNodes.add( node );
58 return this;
59 }
60
61 public MetadataGraphNode addExident( MetadataGraphNode node )
62 {
63 exNodes.add( node );
64 return this;
65 }
66
67 @Override
68 public boolean equals( Object obj )
69 {
70 if ( obj == null )
71 {
72 return false;
73 }
74
75 if ( MetadataGraphNode.class.isAssignableFrom( obj.getClass() ) )
76 {
77 MetadataGraphNode node2 = (MetadataGraphNode) obj;
78
79 if ( node2.metadata == null )
80 {
81 return metadata == null;
82 }
83
84 return metadata == null ? false : metadata.toString().equals( node2.metadata.toString() );
85 }
86 else
87 {
88 return super.equals( obj );
89 }
90 }
91
92 @Override
93 public int hashCode()
94 {
95 if ( metadata == null )
96 {
97 return super.hashCode();
98 }
99
100 return metadata.toString().hashCode();
101 }
102 }