package org.apache.maven.shared.runtime;
   
   /*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.maven.artifact.ArtifactUtils;
  import org.apache.maven.model.Dependency;
  import org.apache.maven.project.MavenProject;
  
  /**
   * Utility methods for working with Maven projects.
   * 
   * @author <a href="mailto:markh@apache.org">Mark Hobson</a>
   * @version $Id: MavenProjectUtils.java 1341416 2012-05-22 11:38:54Z markh $
   * @see MavenProject
   */
  final class MavenProjectUtils
  {
      // constructors -----------------------------------------------------------
  
      private MavenProjectUtils()
      {
          throw new AssertionError();
      }
  
      // public methods ---------------------------------------------------------
  
      /**
       * Aligns dependency versions to their corresponding project version for the specified projects.
       * 
       * @param projects the projects whose dependency versions to align
       */
      public static void mediateDependencyVersions( List<MavenProject> projects )
      {
          Map<String, String> versionsByProjectId = getVersionsByProjectId( projects );
  
          for ( MavenProject project : projects )
          {
              mediateProject( project, versionsByProjectId );
          }
      }
  
      // private methods --------------------------------------------------------
  
      private static void mediateProject( MavenProject project, Map<String, String> versionsByProjectId )
      {
          for ( Dependency dependency : project.getDependencies() )
          {
              mediateDependency( dependency, versionsByProjectId );
          }
      }
  
      private static void mediateDependency( Dependency dependency, Map<String, String> versionsByProjectId )
      {
          String projectId = versionlessKey( dependency );
          String version = versionsByProjectId.get( projectId );
  
          if ( version != null )
          {
              dependency.setVersion( version );
          }
      }
  
      private static Map<String, String> getVersionsByProjectId( List<MavenProject> projects )
      {
          Map<String, String> versionsByProjectId = new HashMap<String, String>();
  
          for ( MavenProject project : projects )
          {
              String projectId = versionlessKey( project );
              String version = project.getVersion();
  
              versionsByProjectId.put( projectId, version );
          }
  
          return versionsByProjectId;
      }
  
      private static String versionlessKey( MavenProject project )
     {
         return ArtifactUtils.versionlessKey( project.getGroupId(), project.getArtifactId() );
     }
 
     private static String versionlessKey( Dependency dependency )
     {
         return ArtifactUtils.versionlessKey( dependency.getGroupId(), dependency.getArtifactId() );
     }
 }