package org.apache.maven.model.plugin;
   
   /*
    * 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 org.apache.maven.model.Build;
  import org.apache.maven.model.Model;
  import org.apache.maven.model.Plugin;
  import org.apache.maven.model.PluginExecution;
  import org.apache.maven.model.PluginManagement;
  import org.apache.maven.model.building.ModelBuildingRequest;
  import org.apache.maven.model.building.ModelProblemCollector;
  import org.codehaus.plexus.component.annotations.Component;
  import org.codehaus.plexus.util.xml.Xpp3Dom;
  
  /**
   * Handles expansion of general build plugin configuration into individual executions.
   *
   * @author Benjamin Bentmann
   */
  @Component( role = PluginConfigurationExpander.class )
  public class DefaultPluginConfigurationExpander
      implements PluginConfigurationExpander
  {
  
      @Override
      public void expandPluginConfiguration( Model model, ModelBuildingRequest request, ModelProblemCollector problems )
      {
          Build build = model.getBuild();
  
          if ( build != null )
          {
              expand( build.getPlugins() );
  
              PluginManagement pluginManagement = build.getPluginManagement();
  
              if ( pluginManagement != null )
              {
                  expand( pluginManagement.getPlugins() );
              }
          }
      }
  
      private void expand( List<Plugin> plugins )
      {
          for ( Plugin plugin : plugins )
          {
              Xpp3Dom pluginConfiguration = (Xpp3Dom) plugin.getConfiguration();
  
              if ( pluginConfiguration != null )
              {
                  for ( PluginExecution execution : plugin.getExecutions() )
                  {
                      Xpp3Dom executionConfiguration = (Xpp3Dom) execution.getConfiguration();
  
                      executionConfiguration =
                          Xpp3Dom.mergeXpp3Dom( executionConfiguration, new Xpp3Dom( pluginConfiguration ) );
  
                      execution.setConfiguration( executionConfiguration );
                  }
              }
          }
      }
  
  }