001package org.apache.maven.repository; 002 003/* 004 * Licensed to the Apache Software Foundation (ASF) under one 005 * or more contributor license agreements. See the NOTICE file 006 * distributed with this work for additional information 007 * regarding copyright ownership. The ASF licenses this file 008 * to you under the Apache License, Version 2.0 (the 009 * "License"); you may not use this file except in compliance 010 * with the License. You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, 015 * software distributed under the License is distributed on an 016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 017 * KIND, either express or implied. See the License for the 018 * specific language governing permissions and limitations 019 * under the License. 020 */ 021 022import java.util.ArrayList; 023import java.util.Collection; 024 025/** 026 * This is the main graph data structure used by the RepositorySystem to present tree and graph objects. 027 * 028 * @author Oleg Gusakov 029 * 030 */ 031public class MetadataGraph 032{ 033 /** all graph nodes */ 034 Collection<MetadataGraphNode> nodes; 035 036 /** entry point for tree-like structures */ 037 MetadataGraphNode entry; 038 039 public MetadataGraph( MetadataGraphNode entry ) 040 { 041 this(); 042 043 this.entry = entry; 044 } 045 046 public MetadataGraph() 047 { 048 nodes = new ArrayList<MetadataGraphNode>( 64 ); 049 } 050 051 public void addNode( MetadataGraphNode node ) 052 { 053 nodes.add( node ); 054 } 055 056 /** 057 * find a node by the GAV (metadata) 058 * 059 * @param md 060 * @return 061 */ 062 public MetadataGraphNode findNode( MavenArtifactMetadata md ) 063 { 064 for ( MetadataGraphNode mgn : nodes ) 065 { 066 if ( mgn.metadata.equals( md ) ) 067 { 068 return mgn; 069 } 070 } 071 072 MetadataGraphNode node = new MetadataGraphNode( md ); 073 addNode( node ); 074 return node; 075 } 076 077 /** 078 * getter 079 * 080 * @return 081 */ 082 public MetadataGraphNode getEntry() 083 { 084 return entry; 085 } 086 087 /** 088 * getter 089 * 090 * @return 091 */ 092 public Collection<MetadataGraphNode> getNodes() 093 { 094 return nodes; 095 } 096}