/*
    * Copyright 2009-2010 Steve Chaloner
    *
    * Licensed 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 be.objectify.led.factory.type;
  
  import be.objectify.led.FactoryResolver;
  import be.objectify.led.GenericTypes;
  import be.objectify.led.ObjectFactory;
  import be.objectify.led.TypeFactory;
  import be.objectify.led.factory.object.SetFactory;
  import be.objectify.led.util.StringUtils;
  
  import java.lang.reflect.Field;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  import java.util.StringTokenizer;
  
  /**
   * @author Steve Chaloner
   * @version <!-- $Revision$ -->, <!-- $Date$ -->
   */
  public class SetTypeFactory implements TypeFactory<Set>
  {
      private final FactoryResolver factoryResolver;
  
      public SetTypeFactory(FactoryResolver factoryResolver)
      {
          this.factoryResolver = factoryResolver;
      }
  
      /**
       * {@inheritDoc}
       */
      public SetFactory createObjectFactory(Class[] classes,
                                            Field field)
      {
          return new SetFactory(classes[0],
                                field,
                                factoryResolver)
          {
              protected Collection parse(String propertyName,
                                         String propertyValue,
                                         ObjectFactory objectFactory)
              {
                  List list = new ArrayList();
                  if (!StringUtils.isEmpty(propertyValue))
                  {
                      for (StringTokenizer stringTokenizer = new StringTokenizer(propertyValue); stringTokenizer.hasMoreTokens();)
                      {
                          list.add(objectFactory.createObject(propertyName,
                                                              stringTokenizer.nextToken()));
                      }
                  }
                  return list;
              }
  
              protected Set createSet()
              {
                  return new HashSet();
              }
          };
      }
  
      /**
       * {@inheritDoc}
       */
      public Class<Set> getBoundClass()
      {
          return Set.class;
      }
  
      /**
       * {@inheritDoc}
       */
      public Class[] determineClassType(Class fieldType,
                                        GenericTypes genericTypes)
      {
          if (genericTypes == null || genericTypes.value().length != 1)
          {
              throw new RuntimeException("GenericTypes(value class) annotation required to determine Collection value type");
          }
  
          return genericTypes.value();
      }
 }