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() );

     }

 }