Session s = openSession();
Transaction t = s.beginTransaction();
Parent p = new Parent("Marc");
Parent p2 = new Parent("Nathalie");
Child c = new Child("Elvira");
Child c2 = new Child("Blase");
p.getChildren().add(c);
p.getChildren().add(c2);
s.persist(p);
s.persist(p2);
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
c = (Child) s.get(Child.class, "Elvira");
c.setAge(2);
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
p = (Parent) s.get(Parent.class, "Marc");
c = (Child) s.get(Child.class, "Elvira");
c.setAge(18);
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
p = (Parent) s.get(Parent.class, "Marc");
p2 = (Parent) s.get(Parent.class, "Nathalie");
c = (Child) s.get(Child.class, "Elvira");
assertEquals( p.getChildren().indexOf(c), 0 );
p.getChildren().remove(c);
p2.getChildren().add(c);
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
Parent p3 = new Parent("Marion");
p3.getChildren().add( new Child("Gavin") );
s.merge(p3);
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
s.createQuery( "delete from Child" ).executeUpdate();
s.createQuery( "delete from Parent" ).executeUpdate();
t.commit();
s.close();
