package org.apache.maven.configuration.internal;
   
   /*
    * 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.io.File;
  
  import org.apache.commons.lang3.Validate;
  import org.apache.maven.configuration.BeanConfigurationException;
  import org.apache.maven.configuration.BeanConfigurationPathTranslator;
  import org.apache.maven.configuration.BeanConfigurationRequest;
  import org.apache.maven.configuration.BeanConfigurationValuePreprocessor;
  import org.apache.maven.configuration.BeanConfigurator;
  import org.codehaus.plexus.component.annotations.Component;
  import org.codehaus.plexus.component.configurator.ComponentConfigurationException;
  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.ExpressionEvaluationException;
  import org.codehaus.plexus.component.configurator.expression.TypeAwareExpressionEvaluator;
  import org.codehaus.plexus.configuration.PlexusConfiguration;
  import org.codehaus.plexus.configuration.xml.XmlPlexusConfiguration;
  import org.codehaus.plexus.util.xml.Xpp3Dom;
  
  /**
   * <strong>Warning:</strong> This is an internal class that is only public for technical reasons, it is not part of the
   * public API. In particular, this class can be changed or deleted without prior notice.
   *
   * @author Benjamin Bentmann
   */
  @Component( role = BeanConfigurator.class )
  public class DefaultBeanConfigurator
      implements BeanConfigurator
  {
  
      private final ConverterLookup converterLookup = new DefaultConverterLookup();
  
      public void configureBean( BeanConfigurationRequest request )
          throws BeanConfigurationException
      {
          Validate.notNull( request, "request cannot be null" );
          Validate.notNull( request.getBean(), "request.bean cannot be null" );
  
          Object configuration = request.getConfiguration();
          if ( configuration == null )
          {
              return;
          }
  
          PlexusConfiguration plexusConfig;
          if ( configuration instanceof PlexusConfiguration )
          {
              plexusConfig = (PlexusConfiguration) configuration;
          }
          else if ( configuration instanceof Xpp3Dom )
          {
              plexusConfig = new XmlPlexusConfiguration( (Xpp3Dom) configuration );
          }
          else
          {
              throw new BeanConfigurationException( "unsupported bean configuration source ("
                  + configuration.getClass().getName() + ")" );
          }
  
          if ( request.getConfigurationElement() != null )
          {
              plexusConfig = plexusConfig.getChild( request.getConfigurationElement() );
          }
  
          ClassLoader classLoader = request.getClassLoader();
          if ( classLoader == null )
          {
              classLoader = request.getBean().getClass().getClassLoader();
          }
  
          BeanExpressionEvaluator evaluator = new BeanExpressionEvaluator( request );
  
          ObjectWithFieldsConverter converter = new ObjectWithFieldsConverter();
  
          try
          {
              converter.processConfiguration( converterLookup, request.getBean(), classLoader, plexusConfig, evaluator );
          }
         catch ( ComponentConfigurationException e )
         {
             throw new BeanConfigurationException( e.getMessage(), e );
         }
     }
 
     static class BeanExpressionEvaluator
         implements TypeAwareExpressionEvaluator
     {
 
         private final BeanConfigurationValuePreprocessor preprocessor;
 
         private final BeanConfigurationPathTranslator translator;
 
         public BeanExpressionEvaluator( BeanConfigurationRequest request )
         {
             preprocessor = request.getValuePreprocessor();
             translator = request.getPathTranslator();
         }
 
         public Object evaluate( String expression, Class<?> type )
             throws ExpressionEvaluationException
         {
             if ( preprocessor != null )
             {
                 try
                 {
                     return preprocessor.preprocessValue( expression, type );
                 }
                 catch ( BeanConfigurationException e )
                 {
                     throw new ExpressionEvaluationException( e.getMessage(), e );
                 }
             }
             return expression;
         }
 
         public Object evaluate( String expression )
             throws ExpressionEvaluationException
         {
             return evaluate( expression, null );
         }
 
         public File alignToBaseDirectory( File file )
         {
             if ( translator != null )
             {
                 return translator.translatePath( file );
             }
             return file;
         }
 
     }
 
 }