NPE after switching from Alpha1 to Alpha2

[jwgmeligmeyling]

Happens on initialisation of the CriteriaBuilderFactory. Switching back to Alpha1 solved the problem for me.

INFO: Blaze-Persistence version: Blaze-Persistence 'Ink' 1.2.0-Alpha2
Exception in thread "main" java.lang.NullPointerException
	at org.hibernate.mapping.Column.getCanonicalName(Column.java:352)
	at org.hibernate.mapping.Table.getColumn(Table.java:232)
	at com.blazebit.persistence.impl.hibernate.HibernateExtendedQuerySupport.getColumnTypes(HibernateExtendedQuerySupport.java:180)
	at com.blazebit.persistence.impl.EntityMetamodelImpl.<init>(EntityMetamodelImpl.java:89)
	at com.blazebit.persistence.impl.CriteriaBuilderFactoryImpl.<init>(CriteriaBuilderFactoryImpl.java:80)
	at com.blazebit.persistence.impl.CriteriaBuilderConfigurationImpl.createCriteriaBuilderFactory(
[....]

[Mobe91]

What Hibernate version are you using?

[beikov]

Would be interesting if you could debug and check for what entity/table and column this happens. Do you have computed columns in your entities maybe?

[jwgmeligmeyling]

5.2.6.Final with the blaze-persistence-integration-hibernate-5.2

[jwgmeligmeyling]

I do have one @Formula column in one entity, if that counts as a computed column. I am running a few batches on 1.2.0-Alpha1, but in a few minutes I can test against 1.2.0-Alpha2 again and provide some debugging information.

[beikov]

Let me create a test for that so I can make sure this works. I think the persister reports null as column name for such properties which is why this exception might happen.

[beikov]

Indeed, was able to reproduce it.

[beikov]

Can you confirm it works with the latest snapshot? Sorry to say, but it seems you'd have to stick to a custom build for now.
From what I can say, the Alpha3 release is probably 1 month away so either you use the SNAPSHOT now or stick with Alpha1 until then.

[jwgmeligmeyling]

Unfortunately the bug is still present in the latest snapshot (I tested against the repository master). After stepping through the code, it seems to happen for a regular column in an abstract entity mapped with @Inheritance(strategy = InheritanceType.TABLE_PER_CLASS). (So the table name actually comes from the subtype)

[jwgmeligmeyling]

Thanks for merging! I'll stick with using the latest SNAPSHOT for now 😉