001package org.apache.maven.repository.metadata; 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.Arrays; 024import java.util.Comparator; 025import java.util.List; 026 027import org.apache.maven.artifact.ArtifactScopeEnum; 028import org.codehaus.plexus.component.annotations.Component; 029import org.codehaus.plexus.component.annotations.Requirement; 030 031/** 032 * default implementation of the metadata classpath transformer 033 * 034 * @author <a href="oleg@codehaus.org">Oleg Gusakov</a> 035 * 036 */ 037@Component( role = ClasspathTransformation.class ) 038public class DefaultClasspathTransformation 039 implements ClasspathTransformation 040{ 041 @Requirement 042 GraphConflictResolver conflictResolver; 043 044 //---------------------------------------------------------------------------------------------------- 045 public ClasspathContainer transform( MetadataGraph dirtyGraph, ArtifactScopeEnum scope, boolean resolve ) 046 throws MetadataGraphTransformationException 047 { 048 try 049 { 050 if ( dirtyGraph == null || dirtyGraph.isEmpty() ) 051 { 052 return null; 053 } 054 055 MetadataGraph cleanGraph = conflictResolver.resolveConflicts( dirtyGraph, scope ); 056 057 if ( cleanGraph == null || cleanGraph.isEmpty() ) 058 { 059 return null; 060 } 061 062 ClasspathContainer cpc = new ClasspathContainer( scope ); 063 if ( cleanGraph.isEmptyEdges() ) 064 { 065 // single entry in the classpath, populated from itself 066 ArtifactMetadata amd = cleanGraph.getEntry().getMd(); 067 cpc.add( amd ); 068 } 069 else 070 { 071 ClasspathGraphVisitor v = new ClasspathGraphVisitor( cleanGraph, cpc ); 072 MetadataGraphVertex entry = cleanGraph.getEntry(); 073 ArtifactMetadata md = entry.getMd(); 074 // entry point 075 v.visit( entry ); // , md.getVersion(), md.getArtifactUri() ); 076 } 077 078 return cpc; 079 } 080 catch ( GraphConflictResolutionException e ) 081 { 082 throw new MetadataGraphTransformationException( e ); 083 } 084 } 085 086 //=================================================================================================== 087 /** 088 * Helper class to traverse graph. Required to make the containing method thread-safe 089 * and yet use class level data to lessen stack usage in recursion 090 */ 091 private class ClasspathGraphVisitor 092 { 093 MetadataGraph graph; 094 095 ClasspathContainer cpc; 096 097 List<MetadataGraphVertex> visited; 098 099 // ----------------------------------------------------------------------- 100 protected ClasspathGraphVisitor( MetadataGraph cleanGraph, ClasspathContainer cpc ) 101 { 102 this.cpc = cpc; 103 this.graph = cleanGraph; 104 105 visited = new ArrayList<MetadataGraphVertex>( cleanGraph.getVertices().size() ); 106 } 107 108 // ----------------------------------------------------------------------- 109 protected void visit( MetadataGraphVertex node ) // , String version, String artifactUri ) 110 { 111 ArtifactMetadata md = node.getMd(); 112 if ( visited.contains( node ) ) 113 { 114 return; 115 } 116 117 cpc.add( md ); 118// 119// TreeSet<MetadataGraphEdge> deps = new TreeSet<MetadataGraphEdge>( 120// new Comparator<MetadataGraphEdge>() 121// { 122// public int compare( MetadataGraphEdge e1 123// , MetadataGraphEdge e2 124// ) 125// { 126// if( e1.getDepth() == e2.getDepth() ) 127// { 128// if( e2.getPomOrder() == e1.getPomOrder() ) 129// return e1.getTarget().toString().compareTo(e2.getTarget().toString() ); 130// 131// return e2.getPomOrder() - e1.getPomOrder(); 132// } 133// 134// return e2.getDepth() - e1.getDepth(); 135// } 136// } 137// ); 138 139 List<MetadataGraphEdge> exits = graph.getExcidentEdges( node ); 140 141 if ( exits != null && exits.size() > 0 ) 142 { 143 MetadataGraphEdge[] sortedExits = exits.toArray( new MetadataGraphEdge[exits.size()] ); 144 Arrays.sort( sortedExits 145 , 146 new Comparator<MetadataGraphEdge>() 147 { 148 public int compare( MetadataGraphEdge e1 149 , MetadataGraphEdge e2 150 ) 151 { 152 if ( e1.getDepth() == e2.getDepth() ) 153 { 154 if ( e2.getPomOrder() == e1.getPomOrder() ) 155 { 156 return e1.getTarget().toString().compareTo( e2.getTarget().toString() ); 157 } 158 return e2.getPomOrder() - e1.getPomOrder(); 159 } 160 161 return e2.getDepth() - e1.getDepth(); 162 } 163 } 164 ); 165 166 for ( MetadataGraphEdge e : sortedExits ) 167 { 168 MetadataGraphVertex targetNode = e.getTarget(); 169 targetNode.getMd().setArtifactScope( e.getScope() ); 170 targetNode.getMd().setWhy( e.getSource().getMd().toString() ); 171 visit( targetNode ); 172 } 173 } 174 175 } 176 //----------------------------------------------------------------------- 177 //----------------------------------------------------------------------- 178 } 179 //---------------------------------------------------------------------------------------------------- 180 //---------------------------------------------------------------------------------------------------- 181} 182 183 184