use of entityManager.createNativeQuery(query,foo.class)

Question

I would like to return a List of Integers from a

javax.persistence.EntityManager.createNativeQuery call

Why is the following incorrect?

Answer 1

JPA was designed to provide an automatic mapping between Objects and a relational database. Since Integer is not a persistant entity, why do you need to use JPA ? A simple JDBC request will work fine.