How to get the field annotated with @Id in EJB3 (JPA) and Hibernate?

Question

The title is self explanatory.

I would be glad to hear solutions, thanks.

Answer 1

There's a shorter approach than listed so far:

Reflections r = new Reflections(this.getClass().getPackage().getName());
Set<Field> fields = r.getFieldsAnnotatedWith(Id.class);

Answer 2

JPA2 has a metamodel. Just use that, and you then stay standards compliant. The docs of any JPA implementation ought to give you enough information on how to access the metamodel