_getRules example

$privileges = array($privileges);
        }

        switch ($operation) {

            // add to the rules             case self::OP_ADD:
                if ($resources !== null) {
                    // this block will iterate the provided resources                     foreach ($resources as $resource) {
                        foreach ($roles as $role) {
                            $rules =& $this->_getRules($resource, $role, true);
                            if (0 === count($privileges)) {
                                $rules['allPrivileges']['type']   = $type;
                                $rules['allPrivileges']['assert'] = $assert;
                                if (!isset($rules['byPrivilegeId'])) {
                                    $rules['byPrivilegeId'] = array();
                                }
                            } else {
                                foreach ($privileges as $privilege) {
                                    $rules['byPrivilegeId'][$privilege]['type']   = $type;
                                    $rules['byPrivilegeId'][$privilege]['assert'] = $assert;
                                }
                            }