[news.eclipse.rt.eclipselink] Re: interfaces

[aclipse@xxxxxxxx (Andreas Leue)]

Dear James,

thank you for the clarification.

> You can define a OneToOne relationship to an interface using the
> @VariableOneToOne EclipseLink annotation.

Is there a notation to do this inside xml mappings?

> There is currently no annotation for interface descriptors, but you
> can define them using a SessionCustomizer and create a
> RelationalDescriptor of interface type (setJavaInterface()).

I tried defining a mapping for an interface in xml, but get a null pointer 
exception at
org.eclipse.persistence.internal.jpa.metadata.accessors.classes.EntityAccessor
line 190:

           EntityAccessor parentAccessor = 
getProject().getEntityAccessor(parent.getName());

I guess that "parent" is null, since interfaces do not habe a superclass.
Is this supposed to work, or am I on the wrong track by trying this?

Besides - I'm just curious: am I the only one missing this feature in JPA? 
To me it seems rather natural to map interfaces.

Andreas