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# lazy.py
# Copyright (C) 2008-2010 Michael Trier (mtrier@gmail.com) and contributors
#
# This module is part of GitPython and is released under
# the BSD License: http://www.opensource.org/licenses/bsd-license.php
class LazyMixin(object):
lazy_properties = []
def __init__(self):
self.__baked__ = False
def __getattribute__(self, attr):
val = object.__getattribute__(self, attr)
if val is not None:
return val
else:
self.__prebake__()
return object.__getattribute__(self, attr)
def __bake__(self):
""" This method should be overridden in the derived class. """
raise NotImplementedError(" '__bake__' method has not been implemented.")
def __prebake__(self):
if self.__baked__:
return
self.__bake__()
self.__baked__ = True
def __bake_it__(self):
self.__baked__ = True
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