package org.apache.maven.archetype.downloader;
   
   /*
    * 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.io.File;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.maven.artifact.Artifact;
  import org.apache.maven.artifact.repository.ArtifactRepository;
  import org.apache.maven.project.ProjectBuildingRequest;
  import org.apache.maven.shared.transfer.artifact.DefaultArtifactCoordinate;
  import org.apache.maven.shared.transfer.artifact.resolve.ArtifactResolver;
  import org.apache.maven.shared.transfer.artifact.resolve.ArtifactResolverException;
  import org.codehaus.plexus.component.annotations.Component;
  import org.codehaus.plexus.component.annotations.Requirement;
  
  /**
   * @author Jason van Zyl
   */
  @Component( role = Downloader.class )
  public class DefaultDownloader
      implements Downloader
  {
      @Requirement
      private ArtifactResolver artifactResolver;
  
      @Override
      public File download( String groupId, String artifactId, String version, ArtifactRepository archetypeRepository,
                            ArtifactRepository localRepository, List<ArtifactRepository> remoteRepositories,
                            ProjectBuildingRequest buildingRequest )
          throws DownloadException, DownloadNotFoundException
     {
          DefaultArtifactCoordinate jarCoordinate = new DefaultArtifactCoordinate();
          jarCoordinate.setGroupId( groupId );
          jarCoordinate.setArtifactId( artifactId );
          jarCoordinate.setVersion( version );
          
          DefaultArtifactCoordinate pomCoordinate = new DefaultArtifactCoordinate();
          pomCoordinate.setGroupId( groupId );
          pomCoordinate.setArtifactId( artifactId );
          pomCoordinate.setVersion( version );
          pomCoordinate.setExtension( "pom" );
  
          List<ArtifactRepository> repositories = new ArrayList<>( remoteRepositories );
          if ( repositories.isEmpty() && archetypeRepository != null )
          {
              repositories.add( archetypeRepository );
          }
          else if ( repositories.isEmpty() && localRepository != null )
          {
              repositories.add( localRepository );
          }
  
          ArtifactRepository localRepo = localRepository;
          
          buildingRequest.setLocalRepository( localRepo );
          buildingRequest.setRemoteRepositories( repositories );
  
          Artifact artifact;
          try
          {
              artifact = artifactResolver.resolveArtifact( buildingRequest, jarCoordinate ).getArtifact();
          }
          catch ( ArtifactResolverException e )
          {
              throw new DownloadException( "Error downloading " + jarCoordinate + ".", e );
          }
  
          // still required???
          try
          {
              artifactResolver.resolveArtifact( buildingRequest, pomCoordinate );
          }
          catch ( ArtifactResolverException e )
          {
              throw new DownloadException( "Error downloading POM for " + artifact.getId() + ".", e );
          }
  
          return artifact.getFile();
      }
  
     @Override
     public File downloadOld( String groupId, String artifactId, String version, ArtifactRepository archetypeRepository,
                              ArtifactRepository localRepository, List<ArtifactRepository> remoteRepositories,
                              ProjectBuildingRequest buildingRequest )
         throws DownloadException, DownloadNotFoundException
     {
         DefaultArtifactCoordinate jarCoordinate = new DefaultArtifactCoordinate();
         jarCoordinate.setGroupId( groupId );
         jarCoordinate.setArtifactId( artifactId );
         jarCoordinate.setVersion( version );
         
         try
         {
             return artifactResolver.resolveArtifact( buildingRequest, jarCoordinate ).getArtifact().getFile();
         }
         catch ( ArtifactResolverException e )
         {
             throw new DownloadException( "Error downloading " + jarCoordinate + ".", e );
         }
     }
 }