How to apply @OneToOne to an interface?

Question

Java

interface Info{}

class Opt implements Info{}
class Val implements Info{}

A class has an object of type Info that can accept objects of one of the types Opt or Val
An attempt to use @OneToOne(targetEntity=Val.class targetEntity=Opt.class) fails because multiple targetEntity is not possible

Answer 1

no way. apply to the class.
if you are looking for where to take out common fields - make an abstract class and mark it with @MappedSuperclass
if the interface, bloody nose, is needed for some things, make a marker interface and superclass it.