Hibernate unbound type and no explicit target entity when using generic

I have the following two classes:

@Entity 
@Table(name = "criteria") 
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name = AbstractCriteria.TYPE, discriminatorType = DiscriminatorType.STRING)
public abstract class AbstractCriteria<T> implements Serializable {

   public static final String TYPE = "type";

   ...
   @Column(name = "clazz") private Class<T> clazz;
   ...

   protected AbstractCriteria(Class<T> clazz) {
      this.clazz = Preconditions.checkNotNull(clazz);
   }
   ...

   public abstract Predicate<T> evaluate(T value);
}

@Entity 
@DiscriminatorValue(CriteriaType.Values.DATETIME_IS_BETWEEN) 
public class DateTimeIsBetweenCriteria extends AbstractCriteria<DateTime> {
   ...
   public DateTimeIsBetweenCriteria() {
      super(DateTime.class);
   }
   ...


   @Override 
   public Predicate<DateTime> evaluate(DateTime value) {
      ...
   }
}

When I tried to save an instance of the DateTimeIsBetweenCriteria class, I got this exception:

Exception in thread "main" org.hibernate.AnnotationException: 
Property ...AbstractCriteria.clazz has an unbound type and no explicit target entity.
Resolve this Generic usage issue or set an explicit target attribute (eg @OneToMany(target=) or use an explicit @Type

I need clazz for a method in AbstractCriteria, and T can be String, DateTime, Boolean, etc.

I was thinking about making clazz @Transient, but if I do that, I still have to have another column to identify which criteria to save so that when loading the criteria back from the database, I know which kind of criteria it is. I think this is kinda hacky.

Any ideas how I can resolve that exception without changing my design?

I appreciate your time a lot.