package org.apache.maven.plugin.dependency.resolvers;
   
   /*
    * 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.FileWriter;
  import java.io.IOException;
  import java.io.Writer;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  
  import org.apache.maven.artifact.Artifact;
  import org.apache.maven.artifact.repository.ArtifactRepository;
  import org.apache.maven.artifact.resolver.ArtifactNotFoundException;
  import org.apache.maven.artifact.resolver.ArtifactResolutionException;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.plugin.dependency.AbstractResolveMojo;
  import org.apache.maven.plugin.dependency.utils.DependencyUtil;
  import org.apache.maven.plugins.annotations.LifecyclePhase;
  import org.apache.maven.plugins.annotations.Mojo;
  import org.apache.maven.plugins.annotations.Parameter;
  import org.apache.maven.project.ProjectBuildingException;
  import org.apache.maven.project.artifact.InvalidDependencyVersionException;
  import org.apache.maven.shared.artifact.filter.collection.ArtifactFilterException;
  import org.apache.maven.shared.artifact.filter.collection.ArtifactsFilter;
  import org.apache.maven.shared.artifact.filter.collection.FilterArtifacts;
  import org.codehaus.plexus.util.IOUtil;
  
  /**
   * Goal that resolves all project plugins and reports and their dependencies.
   *
   * @author <a href="mailto:brianf@apache.org">Brian Fox</a>
   * @version $Id: ResolvePluginsMojo.java 1451088 2013-02-28 04:22:41Z brianf $
   * @since 2.0
   */
  @Mojo( name = "resolve-plugins", defaultPhase = LifecyclePhase.GENERATE_SOURCES, threadSafe = true )
  public class ResolvePluginsMojo
      extends AbstractResolveMojo
  {
  
      /**
       * Remote repositories which will be searched for plugins.
       */
      @Parameter( defaultValue = "${project.pluginArtifactRepositories}", readonly = true, required = true )
      private List<ArtifactRepository> remotePluginRepositories;
  
      /**
       * If we should exclude transitive dependencies
       */
      @Parameter( property = "excludeTransitive", defaultValue = "false" )
      private boolean excludeTransitive;
  
      /**
       * Main entry into mojo. Gets the list of dependencies and iterates through
       * displaying the resolved version.
       *
       * @throws MojoExecutionException with a message if an error occurs.
       */
      protected void doExecute()
          throws MojoExecutionException
      {
          Writer outputWriter = null;
  
          try
          {
              final Set<Artifact> plugins = resolvePluginArtifacts();
  
              if ( this.outputFile != null )
              {
                  outputFile.getParentFile()
                            .mkdirs();
  
                  outputWriter = new FileWriter( outputFile );
              }
  
              for ( final Artifact plugin : plugins )
              {
                  String logStr = "Plugin Resolved: " + DependencyUtil.getFormattedFileName( plugin, false );
                  if ( !silent )
                  {
                      this.getLog()
                          .info( logStr );
                 }
 
                 if ( outputWriter != null )
                 {
                     outputWriter.write( logStr );
                     outputWriter.write( "\n" );
                 }
 
                 if ( !excludeTransitive )
                 {
                     for ( final Artifact artifact : resolveArtifactDependencies( plugin ) )
                     {
                         logStr =
                             "    Plugin Dependency Resolved: " + DependencyUtil.getFormattedFileName( artifact, false );
 
                         if ( !silent )
                         {
                             this.getLog()
                                 .info( logStr );
                         }
 
                         if ( outputWriter != null )
                         {
                             outputWriter.write( logStr );
                             outputWriter.write( "\n" );
                         }
                     }
                 }
             }
         }
         catch ( final IOException e )
         {
             throw new MojoExecutionException( "Nested:", e );
         }
         catch ( final ArtifactResolutionException e )
         {
             throw new MojoExecutionException( "Nested:", e );
         }
         catch ( final ArtifactNotFoundException e )
         {
             throw new MojoExecutionException( "Nested:", e );
         }
         catch ( final ProjectBuildingException e )
         {
             throw new MojoExecutionException( "Nested:", e );
         }
         catch ( final InvalidDependencyVersionException e )
         {
             throw new MojoExecutionException( "Nested:", e );
         }
         catch ( final ArtifactFilterException e )
         {
             throw new MojoExecutionException( "Nested:", e );
         }
         finally
         {
             IOUtil.close( outputWriter );
         }
 
     }
 
     /**
      * This method resolves the plugin artifacts from the project.
      *
      * @return set of resolved plugin artifacts.
      * @throws ArtifactResolutionException
      * @throws ArtifactNotFoundException
      * @throws ArtifactFilterException 
      */
     @SuppressWarnings( "unchecked" )
     protected Set<Artifact> resolvePluginArtifacts()
         throws ArtifactResolutionException, ArtifactNotFoundException, ArtifactFilterException
     {
         final Set<Artifact> plugins = project.getPluginArtifacts();
         final Set<Artifact> reports = project.getReportArtifacts();
 
         Set<Artifact> artifacts = new HashSet<Artifact>();
         artifacts.addAll( reports );
         artifacts.addAll( plugins );
 
         final FilterArtifacts filter = getPluginArtifactsFilter();
         artifacts = filter.filter( artifacts );
 
         //        final ArtifactFilter filter = getPluginFilter();
         for ( final Artifact artifact : new HashSet<Artifact>( artifacts ) )
         {
             //            if ( !filter.include( artifact ) )
             //            {
             //                final String logStr =
             //                    String.format( "    Plugin SKIPPED: %s", DependencyUtil.getFormattedFileName( artifact, false ) );
             //
             //                if ( !silent )
             //                {
             //                    this.getLog()
             //                        .info( logStr );
             //                }
             //
             //                artifacts.remove( artifact );
             //                continue;
             //            }
 
             // resolve the new artifact
             this.resolver.resolve( artifact, this.remotePluginRepositories, this.getLocal() );
         }
         return artifacts;
     }
 
     @Override
     protected ArtifactsFilter getMarkedArtifactFilter()
     {
         return null;
     }
 }