What is a good inheritance strategy with Hibernate and JPA?

Question

I have this situation:

I have an entity, Person, that contains all personal details of a person, like birth date, street address, municipality ecc ecc. And I have an entity ClubMember that describe a member of a club and contains some field like: registration date, type of member, credit, ecc ecc

So, a ClubMember is a Person, and I think is correct describe this with a inheritance: ClubMember extends Person, but, what type of strategy?

I would obtain two table in database, Person and ClubMember, with ClubMember that contain id_person like an @OneToOne relationship, but keep the inheritance between entities; is this possible (and is correct)?

JOINED is the strategy closest to my target, but I lose the ID field of table ClubMember, in fact ID become the ID of table Person...

Answer 1

Blow, you should keep performance issues when choosing some kind of inheritance strategy. Here you can see a good insight about available inheritance strategies. Do not forget a inheritance can be re-writen as a association as follows

instead of

public class A {}

public class B extends A {}

you can use

public class B {

    private A a;

}

Or you can use MapedSuperClass To map all of your inherited properties whitout using any Hibernate/JPA inheritance strategy. See here

Keep in mind when using default JPA/Hibernate annotations, Hibernate always fetch all of subclasses. If you have a single hierarchy, prefer To use Single Table Inheritance strategy. Joined strategy is better designed when you have a complex hierarchy but it suffers due To performance issues when querying for any entity.