How engine extract s Generic Type on runtime

[snau2005]

Hi,
I'm wondering how EJB engine extracts on runtime Class information from List, as I know such info is erased on runtime (Generics rules Java 5), in given example how to get SomeClass.class ?!

@OneToMany(mappedBy = ?someField?)
 public List<SomeClass> someClasses;

Or I'm wrong and this is possible (How?)?

[snau2005]

It's possible:
http://forum.hibernate.org/viewtopic.php?t=954042&highlight=runtime