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# Copyright 2009 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
"""Metaclass to automatically decorate methods."""
from types import FunctionType
__metaclass__ = type
__all__ = ['AutoDecorate']
def AutoDecorate(*decorators):
"""Factory to generate metaclasses that automatically apply decorators."""
class AutoDecorateMetaClass(type):
def __new__(cls, class_name, bases, class_dict):
new_class_dict = {}
for name, value in class_dict.items():
if type(value) == FunctionType:
for decorator in decorators:
value = decorator(value)
assert callable(value), (
"Decorator %s didn't return a callable."
% repr(decorator))
new_class_dict[name] = value
return type.__new__(cls, class_name, bases, new_class_dict)
return AutoDecorateMetaClass
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