BRMS and seam: no principal object

[mvlach]

Hi,

I have run the BRMS with seam, but I have problem with this rule:

rule aaaaaaaa
when
    c: PermissionCheck(name=="ticket", action=="viewDetail")
    p: Principal()
then
    System.out.println("grant ticket: " + p);
    c.grant();
end;

When I remove the p:Principal(), all works good. But I thiks, where should be a principal object in working memory. So, why can I test this rule ?

Btw: the user is logged.

Thanks for response.

Mila