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   *   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
   *
   *    https://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
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   ****************************************************************/
  
  package org.apache.cayenne.reflect;
  
  import org.apache.cayenne.CayenneRuntimeException;
  import org.apache.cayenne.ExtendedEnumeration;
  import org.apache.cayenne.util.Util;
  
  /**
   * @since 1.2
   */
  class EnumConverter<T extends Enum<T> & ExtendedEnumeration> implements Converter<T> {
  
      @Override
      @SuppressWarnings("unchecked")
      public T convert(Object object, Class<T> type) {
  
          if (ExtendedEnumeration.class.isAssignableFrom(type)) {
              ExtendedEnumeration[] values;
  
              try {
                  values = (ExtendedEnumeration[]) type.getMethod("values").invoke(null);
              }
              catch (Exception e) {
                  // unexpected, all enums should have values
                  throw new CayenneRuntimeException(e);
              }
  
              for (ExtendedEnumeration en : values) {
                  if (Util.nullSafeEquals(en.getDatabaseValue(), object)) {
                      return (T) en;
                  }
              }
  
              return null;
          }
  
          if (object == null) {
              return null;
          }
  
          return (T) Enum.valueOf(type, object.toString());
      }
  }
  