/*
    * 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.
   */
  package org.apache.maven.model.plugin;
  
  import java.util.List;
  import javax.inject.Named;
  import javax.inject.Singleton;
  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.util.xml.Xpp3Dom;
  
  /**
   * Handles expansion of general build plugin configuration into individual executions.
   *
   * @author Benjamin Bentmann
   */
  @Named
  @Singleton
  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);
                  }
              }
          }
      }
  }