The original question stems from this question:
Why is this JPA 2.0 mapping giving me an error in Eclipse/JBoss Tools?
As you can see this constellation also freaks out the Eclipse Dali JPA validator. The JPA spec seems to allow this as seen here (somewhat reliable):
Does the JPA specification allow references to non-primary key columns?
The exact code posted in the first question also raises a Hibernate MappingException:
Exception in thread "main" javax.persistence.PersistenceException: [PersistenceUnit: geoareas] Unable to configure EntityManagerFactory
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:374)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:56)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:48)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:32)
at tld.geoareas.Main.main(Main.java:69)
Caused by: org.hibernate.MappingException: property [_tld_geoareas_model_Zip__identifierMapper.country] not found on entity [tld.geoareas.model.Country]
at org.hibernate.mapping.PersistentClass.getRecursiveProperty(PersistentClass.java:378)
at org.hibernate.cfg.annotations.TableBinder.bindFk(TableBinder.java:414)
at org.hibernate.cfg.ToOneFkSecondPass.doSecondPass(ToOneFkSecondPass.java:115)
at org.hibernate.cfg.Configuration.processEndOfQueue(Configuration.java:1550)
at org.hibernate.cfg.Configuration.processFkSecondPassInOrder(Configuration.java:1473)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1389)
at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1345)
at org.hibernate.ejb.Ejb3Configuration.buildMappings(Ejb3Configuration.java:1477)
at org.hibernate.ejb.EventListenerConfigurator.configure(EventListenerConfigurator.java:193)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:1096)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:278)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:362)
... 4 more
Caused by: org.hibernate.MappingException: property [_tld_geoareas_model_Zip__identifierMapper.country] not found on entity [tld.geoareas.model.Country]
at org.hibernate.mapping.PersistentClass.getRecursiveProperty(PersistentClass.java:424)
at org.hibernate.mapping.PersistentClass.getRecursiveProperty(PersistentClass.java:375)
... 15 more
I'm especially irritated by the "recursive property". After all, it's just a simple single-column reference to a UNIQUE, NOT NULL CHAR(2) column of a GeoAreas sub table Countries. Note the inheritance might have some impact here, but it's still not overly complicated IMHO.
So, is this a Hibernate bug?