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1   package org.apache.maven.model.management;
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.Collections;
23  import java.util.HashMap;
24  import java.util.List;
25  import java.util.Map;
26  
27  import javax.inject.Named;
28  import javax.inject.Singleton;
29  
30  import org.apache.maven.model.Dependency;
31  import org.apache.maven.model.DependencyManagement;
32  import org.apache.maven.model.Exclusion;
33  import org.apache.maven.model.Model;
34  import org.apache.maven.model.building.ModelBuildingRequest;
35  import org.apache.maven.model.building.ModelProblemCollector;
36  import org.apache.maven.model.merge.MavenModelMerger;
37  
38  /**
39   * Handles injection of dependency management into the model.
40   *
41   * @author Benjamin Bentmann
42   */
43  @SuppressWarnings( { "checkstyle:methodname" } )
44  @Named
45  @Singleton
46  public class DefaultDependencyManagementInjector
47      implements DependencyManagementInjector
48  {
49  
50      private ManagementModelMerger merger = new ManagementModelMerger();
51  
52      @Override
53      public void injectManagement( Model model, ModelBuildingRequest request, ModelProblemCollector problems )
54      {
55          merger.mergeManagedDependencies( model );
56      }
57  
58      /**
59       * ManagementModelMerger
60       */
61      protected static class ManagementModelMerger
62          extends MavenModelMerger
63      {
64  
65          public void mergeManagedDependencies( Model model )
66          {
67              DependencyManagement dependencyManagement = model.getDependencyManagement();
68              if ( dependencyManagement != null )
69              {
70                  Map<Object, Dependency> dependencies = new HashMap<>();
71                  Map<Object, Object> context = Collections.emptyMap();
72  
73                  for ( Dependency dependency : model.getDependencies() )
74                  {
75                      Object key = getDependencyKey( dependency );
76                      dependencies.put( key, dependency );
77                  }
78  
79                  for ( Dependency managedDependency : dependencyManagement.getDependencies() )
80                  {
81                      Object key = getDependencyKey( managedDependency );
82                      Dependency dependency = dependencies.get( key );
83                      if ( dependency != null )
84                      {
85                          mergeDependency( dependency, managedDependency, false, context );
86                      }
87                  }
88              }
89          }
90  
91          @Override
92          protected void mergeDependency_Optional( Dependency target, Dependency source, boolean sourceDominant,
93                                                   Map<Object, Object> context )
94          {
95              // optional flag is not managed
96          }
97  
98          @Override
99          protected void mergeDependency_Exclusions( Dependency target, Dependency source, boolean sourceDominant,
100                                                    Map<Object, Object> context )
101         {
102             List<Exclusion> tgt = target.getExclusions();
103             if ( tgt.isEmpty() )
104             {
105                 List<Exclusion> src = source.getExclusions();
106 
107                 for ( Exclusion element : src )
108                 {
109                     Exclusion clone = element.clone();
110                     target.addExclusion( clone );
111                 }
112             }
113         }
114 
115     }
116 
117 }