A policy at a certain URL. The final policy is computed by merging the
subtree policies of all ancestor-or-self directories with the URL policy of
the actual URL.
Returns the resulting policy for a certain URL.
Parameters: controller - The acccess controller. Parameters: _url - The URL. Parameters: manager - The policy manager.
Obtains the credentials from the policy manager. This method is expensive
and therefore only called when needed.
throws: AccessControlException - when something went wrong.
Obtains the policies from the policy manager. This method is expensive
and therefore only called when needed.
throws: AccessControlException - when something went wrong.