I'm jumping into the middle of the thread here, so I
apologize if I'm skipping something, but...
> But, my SportsCar bean HAS to extend EntityBean. How
can I have
> implementation inheritance here?
SportsCarBean does NOT have to extend entity bean
directly. If CarBean extends EntityBean, then
SportscarBean can extend CarBean and satisfy the
requirement that your talking about...
Lauren
> > >Consider that I have two classes Car and SportsCar where SportsCar
> >extends
> > >Car. Now, the system has objects of both classes. I want to model this
> > >relationship in entity beans. How should I go about it? Can I have two
> > >entity bean classes.. CarBean and SportsCarBean?
> >You can use implementation inheritance to make SportsCarBean a subclass of
> >CarBean. You can also use interface inheritance for the remote interface.
>
> But, my SportsCar bean HAS to extend EntityBean. How can I have
> implementation inheritance here?
>
>
> >
> >The problem is with the Home interface:
> >
> >public interface CarHome extends javax.ejb.EJBHome {
> > Car findByPrimaryKey(CarKey key)
> > }
> > public interface SportsCarHome extends CarHome {
> > SportsCar findByPrimaryKey(CarKey key);
> > }
>
> findByPrimaryKey() in SportsCar cannot return SprotsCar because then the
> return types won't match.
>
> Also, when I retrieve all the cars, I should also get SportsCars. I can't
> call two findByXXX() methods (one for Car and one for SportsCar) to retrieve
> all the cars.
>
> Please help,
> Tom.
>
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