001package org.apache.maven.model.composition;
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.LinkedHashMap;
024import java.util.List;
025import java.util.Map;
026
027import org.apache.maven.model.Dependency;
028import org.apache.maven.model.DependencyManagement;
029import org.apache.maven.model.Model;
030import org.apache.maven.model.building.ModelBuildingRequest;
031import org.apache.maven.model.building.ModelProblemCollector;
032import org.codehaus.plexus.component.annotations.Component;
033
034/**
035 * Handles the import of dependency management from other models into the target model.
036 *
037 * @author Benjamin Bentmann
038 */
039@Component( role = DependencyManagementImporter.class )
040public class DefaultDependencyManagementImporter
041    implements DependencyManagementImporter
042{
043
044    @Override
045    public void importManagement( Model target, List<? extends DependencyManagement> sources,
046                                  ModelBuildingRequest request, ModelProblemCollector problems )
047    {
048        if ( sources != null && !sources.isEmpty() )
049        {
050            Map<String, Dependency> dependencies = new LinkedHashMap<>();
051
052            DependencyManagement depMngt = target.getDependencyManagement();
053
054            if ( depMngt != null )
055            {
056                for ( Dependency dependency : depMngt.getDependencies() )
057                {
058                    dependencies.put( dependency.getManagementKey(), dependency );
059                }
060            }
061            else
062            {
063                depMngt = new DependencyManagement();
064                target.setDependencyManagement( depMngt );
065            }
066
067            for ( DependencyManagement source : sources )
068            {
069                for ( Dependency dependency : source.getDependencies() )
070                {
071                    String key = dependency.getManagementKey();
072                    if ( !dependencies.containsKey( key ) )
073                    {
074                        dependencies.put( key, dependency );
075                    }
076                }
077            }
078
079            depMngt.setDependencies( new ArrayList<>( dependencies.values() ) );
080        }
081    }
082
083}