how to define annotation for interface implementation_

koeieyou · **Joined:** Mon Mar 13, 2006 6:15 pm **Posts:** 2

hi,
i use ejb3.0,and I have some classes:

Code:

Interface Item{...}
Class  ItemImplA implements Item{...}
Class  ItemImplB implements Item{...}
@Entity
Class Order{
    
[color=red]Item item;[/color]

    ...
}

so now i don't know how to write annotation for item.
i think @TargetEntity can only use for one class.but now i have 2 classes implements Item.What can I do? Is an interface-reference supported?
thanks.

emmanuel · **Posted:** Sat Mar 25, 2006 8:23 am

An interface pointing to 2 different mapped class implementations is not supported currently

daweisse · **Joined:** Tue Apr 25, 2006 10:01 am **Posts:** 1

is there a way to annotate an interface with only one implementing class?
I have an interface Item and just one implementing class ItemImpl. Can I annotate Item pointing to ItemImpl?
I didn't find anything in the Hibernate Annotations Reference concerning Interfaces and how to map them...

Thanks for your help.
Did

emmanuel · **Posted:** Thu Apr 27, 2006 10:35 am

what you should do is annotate the implementation
and use the following construct
@ManyToOne(targetEntity=MyServiceImpl.class)
MyService getMyService()