On 7 October 2010 05:15, hadf <[email protected]> wrote:
> how jpa or jdo knows that Car is associated to User ?
>
> public class Car {
> @OneToMany
> private Set<Key> users; //this relation ship is untyped
> }
Two alternative datastore frameworks add typing in different ways. Twig
uses direct references:
class Car
{
Set<User> users;
}
and Objectify uses generic Keys;
class Car
{
Set<Key<User>> users;
}
http://code.google.com/p/twig-persist/
http://code.google.com/p/objectify-appengine/
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