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.apache.maven.repository;
20
21 import java.util.ArrayList;
22 import java.util.Collection;
23
24 /**
25 * This is the main graph data structure used by the RepositorySystem to present tree and graph objects.
26 *
27 * @author Oleg Gusakov
28 *
29 */
30 public class MetadataGraph {
31 /** all graph nodes */
32 Collection<MetadataGraphNode> nodes;
33
34 /** entry point for tree-like structures */
35 MetadataGraphNode entry;
36
37 public MetadataGraph(MetadataGraphNode entry) {
38 this();
39
40 this.entry = entry;
41 }
42
43 public MetadataGraph() {
44 nodes = new ArrayList<>(64);
45 }
46
47 public void addNode(MetadataGraphNode node) {
48 nodes.add(node);
49 }
50
51 /**
52 * find a node by the GAV (metadata)
53 *
54 * @param md
55 */
56 public MetadataGraphNode findNode(MavenArtifactMetadata md) {
57 for (MetadataGraphNode mgn : nodes) {
58 if (mgn.metadata.equals(md)) {
59 return mgn;
60 }
61 }
62
63 MetadataGraphNode node = new MetadataGraphNode(md);
64 addNode(node);
65 return node;
66 }
67
68 /**
69 * getter
70 */
71 public MetadataGraphNode getEntry() {
72 return entry;
73 }
74
75 /**
76 * getter
77 */
78 public Collection<MetadataGraphNode> getNodes() {
79 return nodes;
80 }
81 }