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1   package org.apache.maven.lifecycle.internal;
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.execution.MavenSession;
23  import org.apache.maven.lifecycle.internal.builder.BuilderCommon;
24  import org.apache.maven.project.MavenProject;
25  import org.codehaus.plexus.component.annotations.Component;
26  
27  import java.util.ArrayList;
28  import java.util.Collections;
29  import java.util.List;
30  
31  /**
32   * <strong>NOTE:</strong> This class is not part of any public api and can be changed or deleted without prior notice.
33   * 
34   * @since 3.0
35   * @author Kristian Rosenvold
36   */
37  @Component( role = BuildListCalculator.class )
38  public class BuildListCalculator
39  {
40      public ProjectBuildList calculateProjectBuilds( MavenSession session, List<TaskSegment> taskSegments )
41      {
42          List<ProjectSegment> projectBuilds = new ArrayList<>();
43  
44          MavenProject rootProject = session.getTopLevelProject();
45  
46          for ( TaskSegment taskSegment : taskSegments )
47          {
48              List<MavenProject> projects;
49  
50              if ( taskSegment.isAggregating() )
51              {
52                  projects = Collections.singletonList( rootProject );
53              }
54              else
55              {
56                  projects = session.getProjects();
57              }
58              for ( MavenProject project : projects )
59              {
60                  ClassLoader tccl = Thread.currentThread().getContextClassLoader();
61                  try
62                  {
63                      BuilderCommon.attachToThread( project ); // Not totally sure if this is needed for anything
64                      MavenSession copiedSession = session.clone();
65                      copiedSession.setCurrentProject( project );
66                      projectBuilds.add( new ProjectSegment( project, taskSegment, copiedSession ) );
67                  }
68                  finally
69                  {
70                      Thread.currentThread().setContextClassLoader( tccl );
71                  }
72              }
73          }
74          return new ProjectBuildList( projectBuilds );
75      }
76  }