"""Contains the Factory class."""
__all__ = ['Factory']
from direct.directnotify.DirectNotifyGlobal import directNotify
[docs]class Factory:
"""This class manages a list of object types and their corresponding constructors.
Objects may be created on-demand from their type. Object types may be any hashable
piece of unique data (such as a string).
This class is intended to be derived from. Subclasses should call self._registerTypes
to set up type constructors."""
notify = directNotify.newCategory('Factory')
[docs] def __init__(self):
self._type2ctor = {}
[docs] def create(self, type, *args, **kwArgs):
return self._type2ctor[type](*args, **kwArgs)
def _registerType(self, type, ctor):
if type in self._type2ctor:
self.notify.debug('replacing %s ctor %s with %s' %
(type, self._type2ctor[type], ctor))
self._type2ctor[type] = ctor
def _registerTypes(self, type2ctor):
for type, ctor in list(type2ctor.items()):
self._registerType(type, ctor)
[docs] def nullCtor(self, *args, **kwArgs):
return None
