Spring - entitymanager / transaction

Hello...
I´m working with Spring Data JPA.
But because it is inflexible, I created a class
sô i could create dynamic query.

So, for that class I have an EntityManager instance.
And since I´m using hibernate´s criteria API, i do this:

Session hibernateSession = entityManager.unwrap(Session.class);
Criteria criteria = hibernateSession.createCriteria(entityClass);

but, at the very first line I receive an exception:

java.lang.IllegalStateException: No transactional EntityManager available


The class that receives entityManager and passes it through another class via constructor:

@PersistenceContext
private EntityManager entityManager;

//...

@PostConstruct
public void init(){
lazyModel = new BaseLazyModelJPA<Grupo, Integer>(grupoService, entityManager, Grupo.class, messageUtil);
grupoFiltro = new Grupo();
}


The class that uses it:


public BaseLazyModelJPA(BaseService<T, PK> baseService,
EntityManager entityManager, Class<T> entityClass,
MessageUtil messageUtil) {
this.entityManager = entityManager;
}

Can any body help me figure this out?

This is naive for you to say

Quote:

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But because it is inflexible, I created a class
sô i could create dynamic query.

---

. Can you provide your config here. I don't think you've enabled transaction manager in your config.