class VehicleAssembler(object):
appearance = property(lambda self: self.__appearance)
def __init__(self, vehicle):
self.__appearance = VehicleAppearance()
self.__vehicleRef = weakref.ref(vehicle)
def prerequisites(self):
prereqs = self.__appearance.prerequisites(self.__vehicleRef())
return prereqs
def _assembleParts(self, vehicle, appearance):
pass
def constructAppearance(self, prereqs):
self._assembleParts(self.__vehicleRef(), self.__appearance)
return self.__appearance
def __init__(self, vehicle):
self.__appearance = VehicleAppearance()
self.__vehicleRef = weakref.ref(vehicle)