The proposed pull request is working.

Awesome, I'm still fixing a few things but it should be integrated soon.

List<?> result1 = session.createQuery( "from Person e where e.id.firstName = 'Emmanuel'" ).list();

Markus Gritsch Are you saying that this does not work?
We might not have a test for this, I need to check.

                // the entire composite key elements have to be available in order to identify a entity
		PersonPK emmanuelPk = new PersonPK();
		emmanuelPk.setFirstName( "Emmanuel" );
		emmanuelPk.setLastName( "Bernard" );
		
		Object result2 = session.get(Person.class, emmanuelPk);

This make sense, session.get(...) is supposed to return only one element. What f there are to users with name 'Emmanuel'? And what if one of the key does not have the surname set, how would you recognize a partial composite key from one with a null attribute (for cases where null is a valid value).

Maybe I'm missing something.