I am modifying an application where an ancestor class is persisted before asking the user what type he wants to use, where some types are descendant classes. Once a class is persisted, is it possible to modify the class type to be a descendant class?
For example,
class Pet{}
class Dog extends Pet{}
.....
Pet p = new Pet();
entityManager.persist(p);
.....
Dog d = new Pet(p); ???
entityManager.persist(d);
In general, I can't find a lot of information about how to use inheritance withc EJB3. Can anyone point me to some good links?
TIA
