[hibernate-dev] Immutable entities

[Steve Ebersole]

What happens if you remove the unecessary save() call after changing the
name?


On Mon, 2008-06-23 at 09:08 +0200, Hardy Ferentschik wrote:
> 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
> 
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