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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.lifecycle.internal.builder.BuilderCommon;
23  import org.apache.maven.project.MavenProject;
24  
25  import java.util.HashMap;
26  import java.util.List;
27  import java.util.Map;
28  
29  /**
30   * Provides the positional index of the project
31   *
32   * @since 3.0
33   * @author Benjamin Bentmann
34   * @author Kristian Rosenvold (extracted class only)
35   *         <p/>
36   *         NOTE: This class is not part of any public api and can be changed or deleted without prior notice.
37   */
38  // Todo: Kristian wonders if this class really is necessary and if it overlaps other concepts.
39  public final class ProjectIndex
40  {
41  
42      private final Map<String, MavenProject> projects;
43  
44      private final Map<String, Integer> indices;
45  
46      public ProjectIndex( List<MavenProject> projects )
47      {
48          this.projects = new HashMap<String, MavenProject>( projects.size() * 2 );
49          this.indices = new HashMap<String, Integer>( projects.size() * 2 );
50  
51          for ( int i = 0; i < projects.size(); i++ )
52          {
53              MavenProject project = projects.get( i );
54              String key = BuilderCommon.getKey( project );
55  
56              this.getProjects().put( key, project );
57              this.getIndices().put( key, i );
58          }
59      }
60  
61      public Map<String, MavenProject> getProjects()
62      {
63          return projects;
64      }
65  
66      public Map<String, Integer> getIndices()
67      {
68          return indices;
69      }
70  }