[hibernate-dev] Immutable entities

[Hardy Ferentschik]

Hi there,

I am trying to figure out what should happen if I modify an entity marked  
as @Immutable. Somehow I expected an exception to be raised, but nothing  
seem to happen. I wrote this test case (the Country entity is marked as  
@Immutable):

	public void testImmutableEntity() throws Exception {
		Session s = openSession();
		Transaction tx = s.beginTransaction();
		Country country = new Country();
		country.setName("Germany");
		s.persist(country);
		tx.commit();
		s.close();

		try {
			s = openSession();
			tx = s.beginTransaction();
			Country germany = (Country) s.get(Country.class, country.getId());
			assertNotNull(germany);
			germany.setName("France");
			s.save(germany);
			// s.delete(germany);
			tx.commit();
			s.close();
			fail();
		} catch (Exception e) {
			log.debug("success");
		}
	}

The exception is never raised. The core documentation only says "Immutable  
classes may not be updated or deleted by the application". It does not say  
anything about what happens if one tries to do so. Should the above  
testcase work or not?

Thanks,
Hardy