I have two classes A, B. A has a uni directional one-one with B. A has 5 properties is mapped to a table TableA B has 3 properties mapped to TableA again So B doesnt really have another table but its the same table
Now in hibernate, how do I give the one-one mapping of A->B
as B doesnt have a primary key of its own

(B doesnt extend A and should not as in my domain model, B is like a common class which many other domain classes have a one-one relationship.

If someone could help me with 3.1 annotations as to how I should annotate the getClassB() in A and the classB domain objects it would be great!


Hibernate version: 3.1

Name and version of the database you are using: Oracle 9i

It sounds like a component mapping might be what you're looking for, have you seen this before? http://www.hibernate.org/hib_docs/v3/reference/en/html/components.html

However, if B is a common class with properties that many other tables have, then maybe it would make sense for B to be a base class that these others extend from?

ie- in many apps I've worked on, we have a "BaseEntity" that contains auditing columns, version columns, ID column, etc, and most others extend from it.