org.hibernate.Session#byNaturalId ( )源码实例Demo

private static Statistics verifyFindCountryByNaturalId(EntityManagerFactory emf, String callingCode, String expectedName) {
    Statistics stats = getStatistics(emf);

    EntityManager em = emf.createEntityManager();
    EntityTransaction transaction = em.getTransaction();
    transaction.begin();

    final Session session = em.unwrap(Session.class);
    final NaturalIdLoadAccess<Country> loader = session.byNaturalId(Country.class);
    loader.using("callingCode", callingCode);
    Country country = loader.load();
    if (!country.getName().equals(expectedName))
        throw new RuntimeException("Incorrect citizen: " + country.getName() + ", expected: " + expectedName);

    transaction.commit();
    em.close();

    return stats;
}
 

private static void updateNaturalId(EntityManagerFactory emf, Map<String, Counts> counts) {
    Statistics stats = getStatistics(emf);

    EntityManager em = emf.createEntityManager();
    EntityTransaction transaction = em.getTransaction();
    transaction.begin();

    final Session session = em.unwrap(Session.class);
    final NaturalIdLoadAccess<Citizen> loader = session.byNaturalId(Citizen.class);
    loader.using("ssn", "45989213T");
    Citizen citizen = loader.load();
    String expected = "Stark";
    if (!citizen.getLastname().equals(expected))
        throw new RuntimeException("Incorrect citizen: " + citizen.getLastname() + ", expected: " + expected);

    citizen.setSsn("78902007R");

    transaction.commit();
    em.close();

    assertRegionStats(counts, stats);
}
 

private static void verifyFindCitizenByNaturalId(EntityManagerFactory emf, String ssn, String expectedLastName,
        Map<String, Counts> counts) {
    Statistics stats = getStatistics(emf);

    EntityManager em = emf.createEntityManager();
    EntityTransaction transaction = em.getTransaction();
    transaction.begin();

    final Session session = em.unwrap(Session.class);
    final NaturalIdLoadAccess<Citizen> loader = session.byNaturalId(Citizen.class);
    loader.using("ssn", ssn);
    Citizen citizen = loader.load();
    if (!citizen.getLastname().equals(expectedLastName))
        throw new RuntimeException("Incorrect citizen: " + citizen.getLastname() + ", expected: " + expectedLastName);

    transaction.commit();
    em.close();

    assertRegionStats(counts, stats);
}