How to persist a collection of interface's Collection<Interface> in JPA ?

Question

Hi, I have an the following scenario:

// several classes that implement different interfaces 
class A implements X,Y {}
class B implements Y,Z {}
class C implements X,Z {}

// other classes that contain collections of one of the interfaces(different objects)
class G {
  Collection<X> mayContainAC;
}
class H {
  Collection<Y> mayContainAB;
}
class I {
  Collection<Z> mayContainBC;
}

How would I go about persisting this using JPA?

From what I can see JPA doesn't support Collections of interfaces. Is the correct? JDO does support it but I am having difficulties getting JDO to place nicely with my Wicket app.

Thanks, Tom

Answer 1

How would I go about persisting this using JPA?

Not supported.

From what I can see JPA doesn't support Collections of interfaces. Is the correct?

If the interface has a single persistent implementer, then you can define it using the targetEntity.

If the interface has multiple implementers, it's not supported by standard JPA.