[eclipselink-users] Embeddables and inheritance

[Laird Nelson <ljnelson@xxxxxxxxx>]

The specification says, with regard to @Embeddable classes:
> Embeddable classes must adhere to the requirements specified in Section 2.1 for entities with the exception
> that embeddable classes are not annotated as Entity.

Section 2.1.9, a sub-section of Section 2.1, and therefore included by it, includes the stanza:
> An entity may inherit from another entity class.

That tells me that @Embeddables should be allowed to inherit from one another in exactly the same way that entities are allowed to inherit from one another.

I have one @Embeddable class (GeneralLedgerAccountIdentifier) that inherits from another (GeneralLedgerAccountType), and, at the moment, adds no additional state information (so no additional persistent fields, although I plan to add some later).  I have another class that uses this @Embeddable as its primary key, via the @EmbeddedId annotation.

EclipseLink (1.1.2-SNAPSHOT) bombs out and says:
> Exception Description: Entity [class ljn.GeneralLedgerAccount] uses [class ljn.GeneralLedgerAccountIdentifier] as embedded id class whose access-type has been determined as [FIELD]. But [class ljn.GeneralLedgerAccountIdentifier] does not define any [FIELD]. It is likely that you have not provided sufficient metadata in your id class [class ljn.GeneralLedgerAccountIdentifier].

Neither OpenJPA nor Hibernate have a problem with this particular construction and work properly in my opinion.

Should I file a bug, or is there a nuance in the specification I am not aware of that governs this case?

Thanks,
Laird