This might be relatively quick to answer, depending on if its possible at all ....

Somewhere in the docs I read that sets of primitive types are not supported by hibernate. Is there any possibility to overcome this limitation by e.g. writing a UserType?

In my application, I have user accounts, and each of these accounts is assigned one ore more "roles", like free_member, administrator...

I planned to put the different roles in a Set of role enums like that:

public interface Account ... {

public Set<Role> getRoles();


As I'm using MySQL, this would be best persisted as a SET column in the user account table, saving me an additional table and a join on each time a security check is performed.

Any suggestions to this?

Best regards
Gregor Melhorn

I plan to add this feature in the following days.

Thank you very much!!! That's really good news!