package groovy.tiger;

import java.lang.reflect.Type;
import java.lang.reflect.ParameterizedType;

/**
 * @author Emmanuel Bernard
 */
public class Home<T> {
   T owner;

   public Class<T> getOwnerClass()
   {
      Class<T> entityClass;
      Type type = getClass().getGenericSuperclass();
      System.out.println( getClass() );
      System.out.println( getClass().getSuperclass() );
      System.out.println( getClass().getGenericSuperclass() );
      if (type instanceof ParameterizedType)
      {
         ParameterizedType paramType = (ParameterizedType) type;
         entityClass = (Class<T>) paramType.getActualTypeArguments()[0];
      }
      else
      {
         throw new IllegalArgumentException("Could not guess entity class by reflection");
      }
      return entityClass;
   }
}

/*
The following Groovy class, does not even compile

package groovy.tiger

import java.lang.reflect.Type;
import java.lang.reflect.ParameterizedType;

class Home<T> {
   T owner

   public Class<T> getOwnerClass()
   {
      def entityClass
      Type type = getClass().getGenericSuperclass();
      if (type instanceof ParameterizedType)
      {
         ParameterizedType paramType = (ParameterizedType) type;
         entityClass = (Class<T>) paramType.getActualTypeArguments()[0];
      }
      else
      {
         throw new IllegalArgumentException("Could not guess entity class by reflection");
      }
      return entityClass;
   }             
}
*/