package org.apache.maven.report.projectinfo;
   
   /*
    * 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.BufferedReader;
  import java.io.File;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.LineNumberReader;
  import java.io.OutputStream;
  import java.util.Locale;
  
  import org.apache.maven.artifact.Artifact;
  import org.apache.maven.artifact.repository.metadata.RepositoryMetadataManager;
  import org.apache.maven.artifact.resolver.filter.ArtifactFilter;
  import org.apache.maven.artifact.resolver.filter.ScopeArtifactFilter;
  import org.apache.maven.plugins.annotations.Component;
  import org.apache.maven.plugins.annotations.Mojo;
  import org.apache.maven.plugins.annotations.Parameter;
  import org.apache.maven.plugins.annotations.ResolutionScope;
  import org.apache.maven.project.DefaultProjectBuildingRequest;
  import org.apache.maven.project.ProjectBuildingRequest;
  import org.apache.maven.report.projectinfo.dependencies.Dependencies;
  import org.apache.maven.report.projectinfo.dependencies.DependenciesReportConfiguration;
  import org.apache.maven.report.projectinfo.dependencies.RepositoryUtils;
  import org.apache.maven.report.projectinfo.dependencies.renderer.DependenciesRenderer;
  import org.apache.maven.shared.dependency.graph.DependencyGraphBuilder;
  import org.apache.maven.shared.dependency.graph.DependencyGraphBuilderException;
  import org.apache.maven.shared.dependency.graph.DependencyNode;
  import org.apache.maven.shared.jar.classes.JarClassesAnalysis;
  import org.codehaus.plexus.util.IOUtil;
  import org.codehaus.plexus.util.ReaderFactory;
  
  /**
   * Generates the Project Dependencies report.
   *
   * @author <a href="mailto:jason@maven.org">Jason van Zyl </a>
   * @author <a href="mailto:vincent.siveton@gmail.com">Vincent Siveton </a>
   * @since 2.0
   */
  @Mojo( name = "dependencies", requiresDependencyResolution = ResolutionScope.TEST )
  public class DependenciesReport
      extends AbstractProjectInfoReport
  {
      /**
       * Images resources dir
       */
      private static final String RESOURCES_DIR = "org/apache/maven/report/projectinfo/resources";
  
      // ----------------------------------------------------------------------
      // Mojo components
      // ----------------------------------------------------------------------
  
      /**
       * Dependency graph builder component.
       *
       * @since 2.5
       */
      @Component( hint = "default" )
      private DependencyGraphBuilder dependencyGraphBuilder;
  
      /**
       * Jar classes analyzer component.
       *
       * @since 2.1
       */
      @Component
      private JarClassesAnalysis classesAnalyzer;
  
      /**
       * Repository metadata component.
       *
       * @since 2.1
       */
      @Component
      private RepositoryMetadataManager repositoryMetadataManager;
  
      // ----------------------------------------------------------------------
      // Mojo parameters
      // ----------------------------------------------------------------------
 
     /**
      * Display file details for each dependency, such as: file size, number of
      * classes, number of packages etc.
      *
      * @since 2.1
      */
     @Parameter( property = "dependency.details.enabled", defaultValue = "true" )
     private boolean dependencyDetailsEnabled;
 
     // ----------------------------------------------------------------------
     // Public methods
     // ----------------------------------------------------------------------
 
     @Override
     public boolean canGenerateReport()
     {
         boolean result = super.canGenerateReport();
         if ( result && skipEmptyReport )
         {
             // This seems to be a bit too much but the DependenciesRenderer applies the same logic
             DependencyNode dependencyNode = resolveProject();
             Dependencies dependencies = new Dependencies( project, dependencyNode, classesAnalyzer );
             result = dependencies.hasDependencies();
         }
 
         return result;
     }
 
     @Override
     public void executeReport( Locale locale )
     {
         try
         {
             copyResources( new File( getOutputDirectory() ) );
         }
         catch ( IOException e )
         {
             getLog().error( "Cannot copy ressources", e );
         }
         
         ProjectBuildingRequest buildingRequest =
             new DefaultProjectBuildingRequest( getSession().getProjectBuildingRequest() );
         buildingRequest.setLocalRepository( localRepository );
         buildingRequest.setRemoteRepositories( remoteRepositories );
         buildingRequest.setPluginArtifactRepositories( pluginRepositories );
 
         RepositoryUtils repoUtils =
             new RepositoryUtils( getLog(), projectBuilder, repositorySystem, resolver,
                                  project.getRemoteArtifactRepositories(), project.getPluginArtifactRepositories(),
                                  buildingRequest, repositoryMetadataManager );
 
         DependencyNode dependencyNode = resolveProject();
 
         Dependencies dependencies = new Dependencies( project, dependencyNode, classesAnalyzer );
 
         DependenciesReportConfiguration config =
             new DependenciesReportConfiguration( dependencyDetailsEnabled );
 
         DependenciesRenderer r =
             new DependenciesRenderer( getSink(), locale, getI18N( locale ), getLog(), dependencies,
                                       dependencyNode, config, repoUtils, repositorySystem, projectBuilder,
                                       buildingRequest );
         r.render();
     }
 
     /**
      * {@inheritDoc}
      */
     public String getOutputName()
     {
         return "dependencies";
     }
 
     @Override
     protected String getI18Nsection()
     {
         return "dependencies";
     }
 
     // ----------------------------------------------------------------------
     // Private methods
     // ----------------------------------------------------------------------
 
     /**
      * @return resolve the dependency tree
      */
     private DependencyNode resolveProject()
     {
         try
         {
             ArtifactFilter artifactFilter = new ScopeArtifactFilter( Artifact.SCOPE_TEST );
             return dependencyGraphBuilder.buildDependencyGraph( project, artifactFilter );
         }
         catch ( DependencyGraphBuilderException e )
         {
             getLog().error( "Unable to build dependency tree.", e );
             return null;
         }
     }
 
     /**
      * @param outputDirectory the wanted output directory
      * @throws IOException if any
      */
     private void copyResources( File outputDirectory )
         throws IOException
     {
         InputStream resourceList = null;
         InputStream in = null;
         BufferedReader reader = null;
         OutputStream out = null;
         try
         {
             resourceList = getClass().getClassLoader().getResourceAsStream( RESOURCES_DIR + "/resources.txt" );
 
             if ( resourceList != null )
             {
                 reader = new LineNumberReader( new InputStreamReader( resourceList, ReaderFactory.US_ASCII ) );
 
                 for ( String line = reader.readLine(); line != null; line = reader.readLine() )
                 {
                     in = getClass().getClassLoader().getResourceAsStream( RESOURCES_DIR + "/" + line );
 
                     if ( in == null )
                     {
                         throw new IOException( "The resource " + line + " doesn't exist." );
                     }
 
                     File outputFile = new File( outputDirectory, line );
 
                     if ( !outputFile.getParentFile().exists() )
                     {
                         outputFile.getParentFile().mkdirs();
                     }
 
                     out = new FileOutputStream( outputFile );
                     IOUtil.copy( in, out );
                     out.close();
                     out = null;
                     in.close();
                     in = null;
                 }
 
                 reader.close();
                 reader = null;
             }
         }
         finally
         {
             IOUtil.close( out );
             IOUtil.close( reader );
             IOUtil.close( in );
             IOUtil.close( resourceList );
         }
     }
 }