//Create a PortalObjectPermission
PortalObjectPermission portalperm = new PortalObjectPermission("/default", "view");
pc.addToRole("employee",portalperm);
PortalObjectPermission windowPerm = new PortalObjectPermission("/default/default/a","view");
pc.addToRole("janitor", windowPerm);
PortalObjectPermission contextPerm = new PortalObjectPermission("/","view");
pc.addToRole("admin", contextPerm);
pc.commit();