JPA equivalent to Hibernate's @NaturalId

Question

In Hibernate I can create a unique key using @NaturalId on several properties of the entity.

Is there a JPA equivalent annotation, something that is a part of javax.persistence?

Craniate

Answer 1

What I usually do is add a unique constraint on the columns, using @Table(uniqueConstraints = @UniqueConstraint(columnNames={column_1, ..., column_n}))

Aeriell

And you also need to set nullable=false, as it is implied by Hibernate's NatuarlId – Wilser

This will not replace an @Id column. Petr's answer is correct. – Overcapitalize

@Amalgovinus The question implied that the desired solution should create a unique key. It was not necessary to mimic the workings of the NaturalId annotation exactly. My answer clearly states that I add unique constraints to columns, I don't pretend I am replacing the NaturalId annotation. – Aeriell

@Amalgovinus I'm using @NaturalId as a "secondary" id, together with @Id Integer id. @NaturalId really like an unique constraints together with NOT NULL and I doubt, it can be used as primary id. – Intumescence

Answer 2

No, there is not. You will have to use composite keys, so either EmbeddedId or IdClass depending what you prefer.

Dismember