I wanted to use the EJB3 @PrePersist/@PreUpdate callback annotations. I haven't gotten it to work (callbacks are not called), and I suspect that I have to use the EntityManager/EntityManagerFactory to get this working.

However, after poking around with the EntityManager stuff, I realized that I won't be able to use the Hibernate Criteria API. (I would like to use the Criteria API internally for my DAO classes.)

Any way around this?

Never mind... I figured it out.

For those interested, you can cast the EntityManager as a HibernateEntityManager and call getSession on the latter to get the good ol' Hibernate Session.