Reports incorrectly defined persistent object classes in the following cases:
Class is not top-level
Class is final
Class is annotated several times
Class is defined as both a persistent entity and an entity listener
Example:
@Entity
@EntityListeners(value = JavaEntity.class) // Error: both @Entity and @EntityListener annotations are pointing to the same class
public final class JavaEntity { // Error: persistent entity should not be final
...
}