/*

  * 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.object;

 import be.objectify.led.FactoryResolver;

 import be.objectify.led.ObjectFactory;

 import org.slf4j.Logger;

 import org.slf4j.LoggerFactory;

 import java.lang.reflect.Field;

 import java.util.Collection;

 import java.util.Set;

 /**

  * @author Steve Chaloner

  */

 public abstract class SetFactory<T> extends AbstractObjectFactory<Set>

 {

     private static final Logger LOGGER = LoggerFactory.getLogger(SetFactory.class);

     private final Class clazz;

     private final Field field;

     private final FactoryResolver factoryResolver;

     public SetFactory(Class clazz,

                        Field field,

                        FactoryResolver factoryResolver)

     {

         this.clazz = clazz;

         this.field = field;

         this.factoryResolver = factoryResolver;

     }

     public Set<T> createObject(String propertyName,

                                String propertyValue)

     {

         Set<T> set = createSet();

         ObjectFactory objectFactory = factoryResolver.resolveFactory(clazz,

                                                                      field);

         if (objectFactory == null)

         {

             LOGGER.info("No factory available for type [{}]",

                         clazz.getCanonicalName());

         }

         else

         {

             Collection<T> values = parse(propertyName,

                                          propertyValue,

                                          objectFactory);

             if (values != null)

             {

                 set.addAll(values);

             }

             else

             {

                 LOGGER.info("Property value [{}] did not parse into collection of type [{}]",

                             propertyValue,

                             clazz.getCanonicalName());

             }

         }

         return set;

     }

     public Class<Set> getBoundClass()

     {

         return Set.class;

     }

     protected abstract Collection<T> parse(String propertyName,

                                            String propertyValue,

                                            ObjectFactory<T> objectFactory);

     protected abstract Set<T> createSet();

 }