Hibernate Subclass which has multiple discriminator values

Question

Hello I have a Subclass which needs to cover multiple Discriminator Values.

something like:

@DiscriminatorValue(value = "ACT","DNR","ATT" )

would do me perfect.

we have existing data where several discriminators can be mapped to one class (as they are similar types of what our system will consider the same thing)

Answer 1

You can use DiscriminatorFormula:

// Base class
@DiscriminatorFormula("case when value in ('ACT','DNR','ATT') then 1 
   when 'OTH' then 2 else 3 end")

// Subclass 
@DiscriminatorValue("1") // maps to ACT, DNR, ATT

Answer 2

A subclass has exactly 1 discriminator value.

You can add additional subclasses under the existing subclass for the extra discriminator values. Subclasses need not have additional properties or behavior.