001package org.apache.maven.lifecycle.internal;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 *
012 *  http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022import org.apache.maven.lifecycle.internal.builder.BuilderCommon;
023import org.apache.maven.project.MavenProject;
024
025import java.util.HashMap;
026import java.util.List;
027import java.util.Map;
028
029/**
030 * Provides the positional index of the project
031 * 
032 * @since 3.0
033 * @author Benjamin Bentmann
034 * @author Kristian Rosenvold (extracted class only)
035 *         <p/>
036 *         NOTE: This class is not part of any public api and can be changed or deleted without prior notice.
037 */
038// Todo: Kristian wonders if this class really is necessary and if it overlaps other concepts.
039public final class ProjectIndex
040{
041
042    private final Map<String, MavenProject> projects;
043
044    private final Map<String, Integer> indices;
045
046    public ProjectIndex( List<MavenProject> projects )
047    {
048        this.projects = new HashMap<String, MavenProject>( projects.size() * 2 );
049        this.indices = new HashMap<String, Integer>( projects.size() * 2 );
050
051        for ( int i = 0; i < projects.size(); i++ )
052        {
053            MavenProject project = projects.get( i );
054            String key = BuilderCommon.getKey( project );
055
056            this.getProjects().put( key, project );
057            this.getIndices().put( key, i );
058        }
059    }
060
061    public Map<String, MavenProject> getProjects()
062    {
063        return projects;
064    }
065
066    public Map<String, Integer> getIndices()
067    {
068        return indices;
069    }
070}