persistence@glassfish.java.net

new to glassfish and EJB3- problem with EntityManager

From: Bob Treacy <bobtreacy_at_yahoo.com>
Date: Sun, 25 Jun 2006 17:29:11 -0700 (PDT)

I am just getting started with Glassfish and EJB3.
What could be causing the first line of findAll()
below to be generating a NullPointerException?

@Stateless
public class StudyFacade implements StudyFacadeLocal {

    @PersistenceContext
    private EntityManager em;
...
    public List findAll() {
        Query q = em.createQuery("SELECT object(s)
from Study as s");
..

}

Thanks,
Bob Treacy