Answer by Reguel Wermelinger

Reguel Wermelinger — Mon, 22 Dec 2014 08:53:05 -0500

The interface of IIvyEntityManager makes it possible to access the "real" JPA EntityManager by invoking createEntityManager(). So code that uses it could look like this:

private static List<String> getMatchingCountries(String country){
    IIvyEntityManager ivyEntityManager = Ivy.persistence().get("PERSISTENCE_UNIT_NAME");
    EntityManager em = ivyEntityManager.createEntityManager();
    try{
        em.getTransaction().begin();

        // DO FANCY PLAIN JPA STUFF
        Query countryQuery = em.createQuery(
            "SELECT DISTINCT a.country FROM Address a " +
            "WHERE a.country LIKE :userInput");
            countryQuery.setParameter("userInput", "%"+country+"%");
        List<String> result = (List<String>) countryQuery.getResultList();

        em.getTransaction().commit();
        return result;
    }
    finally
    {
        em.close();
    }
}

Answers to: How to use JPA entity manager instead of Ivy Entity Manager?

Answer by Reguel Wermelinger