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1   package org.apache.maven.resolver.examples;
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 org.apache.maven.resolver.examples.util.Booter;
23  import org.apache.maven.resolver.examples.util.ReverseTreeRepositoryListener;
24  import org.eclipse.aether.DefaultRepositorySystemSession;
25  import org.eclipse.aether.RepositorySystem;
26  import org.eclipse.aether.artifact.Artifact;
27  import org.eclipse.aether.artifact.DefaultArtifact;
28  import org.eclipse.aether.collection.CollectRequest;
29  import org.eclipse.aether.resolution.ArtifactDescriptorRequest;
30  import org.eclipse.aether.resolution.ArtifactDescriptorResult;
31  import org.eclipse.aether.util.graph.manager.DependencyManagerUtils;
32  import org.eclipse.aether.util.graph.transformer.ConflictResolver;
33  import org.eclipse.aether.util.listener.ChainedRepositoryListener;
34  
35  /**
36   * Example of building reverse dependency tree using custom {@link ReverseTreeRepositoryListener}.
37   */
38  public class ReverseDependencyTree
39  {
40  
41      /**
42       * Main.
43       * @param args
44       * @throws Exception
45       */
46      public static void main( String[] args )
47          throws Exception
48      {
49          System.out.println( "------------------------------------------------------------" );
50          System.out.println( ReverseDependencyTree.class.getSimpleName() );
51  
52          RepositorySystem system = Booter.newRepositorySystem( Booter.selectFactory( args ) );
53  
54          DefaultRepositorySystemSession session = Booter.newRepositorySystemSession( system );
55  
56          // install the listener into session
57          session.setRepositoryListener( new ChainedRepositoryListener( session.getRepositoryListener(),
58                  new ReverseTreeRepositoryListener() ) );
59  
60          session.setConfigProperty( ConflictResolver.CONFIG_PROP_VERBOSE, true );
61          session.setConfigProperty( DependencyManagerUtils.CONFIG_PROP_VERBOSE, true );
62  
63          Artifact artifact = new DefaultArtifact( "org.apache.maven:maven-resolver-provider:3.6.1" );
64  
65          ArtifactDescriptorRequest descriptorRequest = new ArtifactDescriptorRequest();
66          descriptorRequest.setArtifact( artifact );
67          descriptorRequest.setRepositories( Booter.newRepositories( system, session ) );
68          ArtifactDescriptorResult descriptorResult = system.readArtifactDescriptor( session, descriptorRequest );
69  
70          CollectRequest collectRequest = new CollectRequest();
71          collectRequest.setRequestContext( "demo" );
72          collectRequest.setRootArtifact( descriptorResult.getArtifact() );
73          collectRequest.setDependencies( descriptorResult.getDependencies() );
74          collectRequest.setManagedDependencies( descriptorResult.getManagedDependencies() );
75          collectRequest.setRepositories( descriptorRequest.getRepositories() );
76  
77          system.collectDependencies( session, collectRequest );
78  
79          // in this demo we are not interested in collect result,
80          // as all the "demo work" is done by installed ReverseTreeRepositoryListener
81      }
82  
83  }