Default class for Hibernate Single Table Inheritance Scheme

Question

I have an application that maps views into an existing Hibernate schema that makes extensive use of single table inheritance with a discriminator-value in the CLASSNAME column. What makes my situation unusual is that I do not what to support all the subclasses (discriminator-value in the Hibernate mappings) in the data, just those of interest to the application.

The problem is that if the application encounters an unsupported discriminator-value, Hibernate throws a "org.hibernate.WrongClassException" because it cannot find a mapping with the required discriminator-value.

What I would like to do is to create subclass that Hibernate will use if the discriminator-value is unknown (instead of throwing an exception).

Is there a way to do this?

Thanks, Ed

Community · Accepted Answer · 2017-05-23 12:14:03Z

0

I found the answer here for those using annotation:

Mapping Hibernate entity for unknown DiscriminatorValue for InheritanceType.SINGLE_TABLE.

What this does not tell you is what to use in a mapping file. I checked the open source code and it appears that the discriminator-value="<not null discriminator>" will do the trick. Hibernate checks for this value (and <null discriminator>), and gives them special handling.

edited May 23, 2017 at 12:14

CommunityBot

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answered Jul 18, 2015 at 0:34

Ed Van Horne

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