/*
    * 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.eclipse.aether.internal.transport.wagon;
  
  import javax.inject.Inject;
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import org.apache.maven.wagon.Wagon;
  import org.codehaus.plexus.PlexusContainer;
  import org.codehaus.plexus.classworlds.realm.ClassRealm;
  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;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * A wagon configurator based on the Plexus component configuration framework.
   */
  @Named("plexus")
  @Singleton
  public class PlexusWagonConfigurator implements WagonConfigurator {
      private final PlexusContainer container;
  
      /**
       * Creates a wagon configurator using the specified Plexus container.
       *
       * @param container The Plexus container instance to use, must not be {@code null}.
       */
      @Inject
      public PlexusWagonConfigurator(final PlexusContainer container) {
          this.container = requireNonNull(container, "plexus container cannot be null");
      }
  
      public void configure(Wagon wagon, Object configuration) throws Exception {
          requireNonNull(wagon, "wagon cannot be null");
          requireNonNull(configuration, "configuration cannot be null");
  
          PlexusConfiguration config;
          if (configuration instanceof PlexusConfiguration) {
              config = (PlexusConfiguration) configuration;
          } else if (configuration instanceof Xpp3Dom) {
              config = new XmlPlexusConfiguration((Xpp3Dom) configuration);
          } 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);
          }
      }
  }