package org.eclipse.aether.internal.transport.wagon;
   
   /*
    * 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 static java.util.Objects.requireNonNull;
  
  import org.apache.maven.wagon.Wagon;
  import org.codehaus.plexus.PlexusContainer;
  import org.codehaus.plexus.classworlds.realm.ClassRealm;
  import org.codehaus.plexus.component.annotations.Component;
  import org.codehaus.plexus.component.annotations.Requirement;
  import org.codehaus.plexus.component.configurator.AbstractComponentConfigurator;
  import org.codehaus.plexus.component.configurator.ComponentConfigurationException;
  import org.codehaus.plexus.component.configurator.ConfigurationListener;
  import org.codehaus.plexus.component.configurator.converters.composite.ObjectWithFieldsConverter;
  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;
  import org.eclipse.aether.transport.wagon.WagonConfigurator;
  
  /**
   * A wagon configurator based on the Plexus component configuration framework.
   */
  @Component( role = WagonConfigurator.class, hint = "plexus" )
  public class PlexusWagonConfigurator
      implements WagonConfigurator
  {
  
      @Requirement
      private PlexusContainer container;
  
      /**
       * Creates an uninitialized wagon configurator.
       * 
       * @noreference This constructor only supports the Plexus IoC container and should not be called directly by
       *              clients.
       */
      public PlexusWagonConfigurator()
      {
          // enables no-arg constructor
      }
  
      /**
       * Creates a wagon configurator using the specified Plexus container.
       *
       * @param container The Plexus container instance to use, must not be {@code null}.
       */
      public PlexusWagonConfigurator( PlexusContainer container )
      {
          this.container = requireNonNull( container, "plexus container cannot be null" );
      }
  
      public void configure( Wagon wagon, Object configuration )
          throws Exception
      {
          PlexusConfiguration config = null;
          if ( configuration instanceof PlexusConfiguration )
          {
              config = (PlexusConfiguration) configuration;
          }
          else if ( configuration instanceof Xpp3Dom )
          {
              config = new XmlPlexusConfiguration( (Xpp3Dom) configuration );
          }
          else if ( configuration == null )
          {
              return;
          }
          else
          {
              throw new IllegalArgumentException( "unexpected configuration type: " + configuration.getClass().getName() );
          }
  
          WagonComponentConfigurator configurator = new WagonComponentConfigurator();
  
          configurator.configureComponent( wagon, config, container.getContainerRealm() );
      }
  
      static class WagonComponentConfigurator
          extends AbstractComponentConfigurator
      {
 
         @Override
         public void configureComponent( Object component, PlexusConfiguration configuration,
                                         ExpressionEvaluator expressionEvaluator, ClassRealm containerRealm,
                                         ConfigurationListener listener )
             throws ComponentConfigurationException
         {
             ObjectWithFieldsConverter converter = new ObjectWithFieldsConverter();
 
             converter.processConfiguration( converterLookup, component, containerRealm, configuration,
                                             expressionEvaluator, listener );
         }
 
     }
 
 }