public final static boolean notGranted(UserDetails userDetails, String permission) {
		Collection<GrantedPrivilege> privileges = userDetails.getAllPrivileges();
		if(privileges == null || privileges.size() < 1) {
			return true;
		}
		
		for(GrantedPrivilege privilege : privileges) {
			if(comparePrivilege(privilege, permission)) {
				return false;
			}
		}
		return true;
	}