Question

We are developing a Java EE application using Hibernate as a JPA provider. We now wish to use Hibernate Criterias but for that I need to get access to the HibernateEntityManagerImpl.

We have this currently in our componentContext.xml

  <context:component-scan base-package="com.volvo.it.lsm"/>

<!-- JPA EntityManagerFactory -->
<bean id="EmployeeDomainEntityManagerFactory" parent="hibernateEntityManagerFactory"      class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> 
     <property name="persistenceUnitName" value="EmployeeDomainPU" /> 
</bean>

and in our classes:

@PersistenceContext(unitName = "EmployeeDomainPU")
public void setEntityManager(EntityManager em) {
    this.em = em;
}

Thanks!

Answer 1

Use this code:

Session session = (Session) entityManager.getDelegate();
session.createCriteria(...);

Note that JPA2 has a (different) Criteria API as well. It’s harder to use IMHO, but it’s more type-safe, and has the same advantages as the Hibernate Criteria API (be able to dynamically compose a query)