/*
    * 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;
      }
  }