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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.maven.lifecycle.internal;
20  
21  import java.util.HashMap;
22  import java.util.List;
23  import java.util.Map;
24  
25  import org.apache.maven.lifecycle.internal.builder.BuilderCommon;
26  import org.apache.maven.project.MavenProject;
27  
28  /**
29   * <p>
30   * Provides the positional index of the project
31   * </p>
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   */
36  // TODO Kristian wonders if this class really is necessary and if it overlaps other concepts.
37  public final class ProjectIndex {
38  
39      private final Map<String, MavenProject> projects;
40  
41      private final Map<String, Integer> indices;
42  
43      public ProjectIndex(List<MavenProject> projects) {
44          this.projects = new HashMap<>(projects.size() * 2);
45          this.indices = new HashMap<>(projects.size() * 2);
46  
47          for (int i = 0; i < projects.size(); i++) {
48              MavenProject project = projects.get(i);
49              String key = BuilderCommon.getKey(project);
50  
51              this.getProjects().put(key, project);
52              this.getIndices().put(key, i);
53          }
54      }
55  
56      public Map<String, MavenProject> getProjects() {
57          return projects;
58      }
59  
60      public Map<String, Integer> getIndices() {
61          return indices;
62      }
63  }