Hi,

I've a question about inheritance in context of code generation.
I want to generate the annotated model classes as superclasses.
(code generation from an UML model as base)
e.g.

Generated superclass:

@Entity
@Table(name="USER")
public class UserAbstract implements java.io.Serializable {
...
}

These generated classes should act as superclasses for concrete classes which are implemented by hand.

Subclass:

public class User extends UserAbstract
..
}


Is this possible for the annotation model? When I annotate a superclass and use a subclass for persistence I get Exceptions when I try to persist the object with the EntityManager ==>

Exception in thread "main" java.lang.IllegalArgumentException: Unknown entity: User

It seems that the concrete instance has to be annotated.

Could anybody give me a hint how to solve such problems?


TIA

Martin

this is not possible

@MappedSuperclass
public class UserAbstract implements java.io.Serializable {
...
}


@Entity
public class User extends UserAbstract
..
}