JPA Objects does not currently provide any support to access the underlying JPA Persistence Context (javax.persistence.PersistenceContext), nor to other abstractions such as the javax.persistence.EntityManager, javax.persistence.EntityManagerFactory, javax.persistence.EntityTransaction or javax.persistence.Query.

This also means that the locking modes (per javax.persistence.LockModeType and the EntityManager.lock() method) cannot currently be specified.