/*

  * 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 org.slf4j.Logger;

 import org.slf4j.LoggerFactory;

 /**

  * Object factory for Enums.

  *

  * @author Steve Chaloner

  */

 public class EnumFactory extends AbstractObjectFactory<Enum>

 {

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

     private final Class<? extends Enum> clazz;

     public EnumFactory(Class<? extends Enum> clazz)

     {

         this.clazz = clazz;

     }

     /**

      * {@inheritDoc}

      */

     public Enum createObject(String propertyName,

                              String propertyValue)

     {

         Enum value = null;

         if (propertyValue != null)

         {

             propertyValue = propertyValue.trim();

             try

             {

                 value = getValue(clazz,

                                  propertyValue);

             }

             catch (IllegalArgumentException e)

             {

                 LOGGER.error(String.format("Unable to parse %s to enum of type [%s]",

                                            propertyValue,

                                            clazz),

                              e);

             }

         }

         return value;

     }

     /**

      * {@inheritDoc}

      */

     public Class<Enum> getBoundClass()

     {

         return Enum.class;

     }

     private Enum getValue(Class<? extends Enum> clazz,

                           String value) throws IllegalArgumentException

     {

         Enum e;

         try

         {

             e = Enum.valueOf(clazz,

                              value);

         }

         catch (IllegalArgumentException e1)

         {

             try

             {

                 e = Enum.valueOf(clazz,

                                  value.toUpperCase());

             }

             catch (IllegalArgumentException e2)

             {

                 e = Enum.valueOf(clazz,

                                  value.toLowerCase());

             }

         }

         return e;

     }

 }