package org.apache.maven.shared.tools.test;
   
   /*
    * 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.lang.reflect.Field;
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Method;
  import java.util.HashMap;
  import java.util.Map;
  
  import org.codehaus.plexus.util.ReflectionUtils;
  import org.codehaus.plexus.util.StringUtils;
  
  /**
   * @version $Id$
   */
  public class ReflectiveSetter
  {
      private Map<String, Setter> cachedPropertySetters = new HashMap<String, Setter>();
  
      private final Class<?> targetClass;
  
      /**
       * @param targetClass
       */
      public ReflectiveSetter( Class<?> targetClass )
      {
          this.targetClass = targetClass;
      }
  
      /**
       * @param propertyName
       * @param value
       * @param target
       * @throws Throwable
       */
      public void setProperty( String propertyName, Object value, Object target )
          throws Throwable
      {
  
          String preferredMethodName = "set" + StringUtils.capitalizeFirstLetter( propertyName );
  
          Setter setter = null;
  
          Method method = ReflectionUtils.getSetter( preferredMethodName, targetClass );
  
          if ( method != null )
          {
              setter = new MethodSetter( propertyName, method );
          }
          else
          {
              Field field = ReflectionUtils.getFieldByNameIncludingSuperclasses( propertyName, targetClass );
  
              setter = new FieldSetter( propertyName, field );
          }
  
          cachedPropertySetters.put( setter.getProperty(), setter );
  
          try
          {
              setter.set( value, target );
          }
          catch ( InvocationTargetException e )
          {
              throw e.getTargetException();
          }
      }
  
      private interface Setter
      {
          void set( Object value, Object target )
              throws IllegalArgumentException, IllegalAccessException, InvocationTargetException;
  
          String getProperty();
      }
  
      private static class MethodSetter
          implements Setter
      {
          private Method method;
  
         private String name;
 
         MethodSetter( String name, Method method )
         {
             this.name = name;
             this.method = method;
         }
 
         /** {@inheritDoc} */
         public String getProperty()
         {
             return name;
         }
 
         /** {@inheritDoc} */
         public void set( Object value, Object target )
             throws IllegalArgumentException, IllegalAccessException, InvocationTargetException
         {
             boolean wasAccessible = method.isAccessible();
 
             method.setAccessible( true );
             try
             {
                 method.invoke( target, new Object[] { value } );
             }
             finally
             {
                 method.setAccessible( wasAccessible );
             }
         }
     }
 
     private static class FieldSetter
         implements Setter
     {
         private Field field;
 
         private String name;
 
         FieldSetter( String name, Field field )
         {
             this.name = name;
             this.field = field;
         }
 
         /** {@inheritDoc} */
         public String getProperty()
         {
             return name;
         }
 
         /** {@inheritDoc} */
         public void set( Object value, Object target )
             throws IllegalArgumentException, IllegalAccessException, InvocationTargetException
         {
             boolean wasAccessible = field.isAccessible();
 
             field.setAccessible( true );
             try
             {
                 field.set( target, value );
             }
             finally
             {
                 field.setAccessible( wasAccessible );
             }
         }
     }
 }