/*
    * 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.felix.bundleplugin;
  
  
  import org.apache.maven.archiver.MavenArchiveConfiguration;
  import org.apache.maven.project.MavenProject;
  import org.codehaus.plexus.component.configurator.converters.composite.ObjectWithFieldsConverter;
  import org.codehaus.plexus.component.configurator.converters.lookup.ConverterLookup;
  import org.codehaus.plexus.component.configurator.converters.lookup.DefaultConverterLookup;
  import org.codehaus.plexus.component.configurator.expression.DefaultExpressionEvaluator;
  import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluator;
  import org.codehaus.plexus.configuration.PlexusConfiguration;
  import org.codehaus.plexus.configuration.xml.XmlPlexusConfiguration;
  import org.codehaus.plexus.util.xml.Xpp3Dom;
  
  
  /**
   * Provide access to the archive configuration from the jar plugin
   * 
   * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a>
   */
  public final class JarPluginConfiguration
  {
      public static MavenArchiveConfiguration getArchiveConfiguration( MavenProject project )
      {
          MavenArchiveConfiguration archiveConfig = new MavenArchiveConfiguration();
  
          try
          {
              ObjectWithFieldsConverter converter = new ObjectWithFieldsConverter();
              ClassLoader loader = JarPluginConfiguration.class.getClassLoader();
              ExpressionEvaluator evaluator = new DefaultExpressionEvaluator();
              ConverterLookup converters = new DefaultConverterLookup();
  
              PlexusConfiguration settings = null;
  
              try
              {
                  // first look for bundle specific archive settings
                  settings = getPluginConfiguration( project, "org.apache.felix", "maven-bundle-plugin" );
                  settings = settings.getChild( "archive" );
              }
              catch ( Exception e )
              {
              }
  
              // if it's empty fall back to the jar archive settings
              if ( null == settings || settings.getChildCount() == 0 )
              {
                  settings = getCorePluginConfiguration( project, "jar" );
                  settings = settings.getChild( "archive" );
              }
  
              converter.processConfiguration( converters, archiveConfig, loader, settings, evaluator, null );
          }
          catch ( Exception e )
          {
              // ignore and return empty configuration...
          }
  
          return archiveConfig;
      }
  
  
      private static PlexusConfiguration getCorePluginConfiguration( MavenProject project, String pluginName )
      {
          return getPluginConfiguration( project, "org.apache.maven.plugins", "maven-" + pluginName + "-plugin" );
      }
  
  
      private static PlexusConfiguration getPluginConfiguration( MavenProject project, String groupId, String artifactId )
      {
          Xpp3Dom pluginConfig = project.getGoalConfiguration( groupId, artifactId, null, null );
  
          return new XmlPlexusConfiguration( pluginConfig );
      }
  }