package org.apache.maven.project;
   
   /*
    * 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.List;
  import java.util.Objects;
  
  import org.apache.maven.artifact.repository.ArtifactRepository;
  import org.apache.maven.model.Model;
  import org.apache.maven.model.building.AbstractModelBuildingListener;
  import org.apache.maven.model.building.ModelBuildingEvent;
  import org.apache.maven.model.building.ModelProblem.Severity;
  import org.apache.maven.model.building.ModelProblem.Version;
  import org.apache.maven.model.building.ModelProblemCollectorRequest;
  import org.apache.maven.plugin.PluginManagerException;
  import org.apache.maven.plugin.PluginResolutionException;
  import org.apache.maven.plugin.version.PluginVersionResolutionException;
  
  /**
   * Processes events from the model builder while building the effective model for a {@link MavenProject} instance.
   *
   * @author Benjamin Bentmann
   */
  public class DefaultModelBuildingListener
      extends AbstractModelBuildingListener
  {
  
      private MavenProject project;
  
      private ProjectBuildingHelper projectBuildingHelper;
  
      private ProjectBuildingRequest projectBuildingRequest;
  
      private List<ArtifactRepository> remoteRepositories;
  
      private List<ArtifactRepository> pluginRepositories;
  
      public DefaultModelBuildingListener( MavenProject project, ProjectBuildingHelper projectBuildingHelper,
                                           ProjectBuildingRequest projectBuildingRequest )
      {
          this.project = Objects.requireNonNull( project, "project cannot be null" );
          this.projectBuildingHelper =
              Objects.requireNonNull( projectBuildingHelper, "projectBuildingHelper cannot be null" );
          this.projectBuildingRequest =
              Objects.requireNonNull( projectBuildingRequest, "projectBuildingRequest cannot be null" );
          this.remoteRepositories = projectBuildingRequest.getRemoteRepositories();
          this.pluginRepositories = projectBuildingRequest.getPluginArtifactRepositories();
      }
  
      /**
       * Gets the project whose model is being built.
       *
       * @return The project, never {@code null}.
       */
      public MavenProject getProject()
      {
          return project;
      }
  
      @Override
      public void buildExtensionsAssembled( ModelBuildingEvent event )
      {
          Model model = event.getModel();
  
          try
          {
              pluginRepositories =
                  projectBuildingHelper.createArtifactRepositories( model.getPluginRepositories(), pluginRepositories,
                                                                    projectBuildingRequest );
          }
          catch ( Exception e )
          {
              event.getProblems().add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE )
                      .setMessage( "Invalid plugin repository: " + e.getMessage() )
                      .setException( e ) );
          }
          project.setPluginArtifactRepositories( pluginRepositories );
  
          if ( event.getRequest().isProcessPlugins() )
          {
              try
              {
                 ProjectRealmCache.CacheRecord record =
                     projectBuildingHelper.createProjectRealm( project, model, projectBuildingRequest );
 
                 project.setClassRealm( record.getRealm() );
                 project.setExtensionDependencyFilter( record.getExtensionArtifactFilter() );
             }
             catch ( PluginResolutionException | PluginManagerException | PluginVersionResolutionException e )
             {
                 event.getProblems().add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE )
                         .setMessage( "Unresolveable build extension: " + e.getMessage() )
                         .setException( e ) );
             }
 
             projectBuildingHelper.selectProjectRealm( project );
         }
 
         // build the regular repos after extensions are loaded to allow for custom layouts
         try
         {
             remoteRepositories =
                 projectBuildingHelper.createArtifactRepositories( model.getRepositories(), remoteRepositories,
                                                                   projectBuildingRequest );
         }
         catch ( Exception e )
         {
             event.getProblems().add( new ModelProblemCollectorRequest( Severity.ERROR, Version.BASE )
                     .setMessage( "Invalid artifact repository: " + e.getMessage() )
                     .setException( e ) );
         }
         project.setRemoteArtifactRepositories( remoteRepositories );
     }
 
 }