/*

  * 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.

  */

 package org.codehaus.mojo.flatten.model.resolution;

 import com.google.common.base.Objects;

 import org.apache.maven.project.MavenProject;

 import java.io.File;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

 /**

  * Holds a list of models and allows to retrieve them by their coordinates.

  *

  * @author Christoph Böhme

  */

 class ReactorModelPool

 {

     private Map<Coordinates, File> models = new HashMap<Coordinates, File>();

     public File find( String groupId, String artifactId, String version )

     {

         return models.get( new Coordinates( groupId, artifactId, version ) );

     }

     public void addProjects( List<MavenProject> projects )

     {

         for ( MavenProject project : projects )

         {

             addProject( project );

         }

     }

     public void addProject( MavenProject project )

     {

         Coordinates coordinates = new Coordinates( project.getGroupId(), project.getArtifactId(),

                 project.getVersion() );

         models.put( coordinates, project.getFile() );

     }

     private static final class Coordinates

     {

         final String groupId;

         final String artifactId;

         final String version;

         Coordinates( String groupId, String artifactId, String version ) {

             this.groupId = groupId;

             this.artifactId = artifactId;

             this.version = version;

         }

         @Override

         public boolean equals(Object obj) {

             if (obj == this) {

                 return true;

             }

             if (obj instanceof Coordinates) {

                 Coordinates other = (Coordinates) obj;

                 return artifactId.equals(other.artifactId) && groupId.equals(other.groupId)

                         && version.equals(other.version);

             }

             return false;

         }

         @Override

         public int hashCode() {

             return Objects.hashCode(artifactId, groupId, version);

         }

     }

 }