from typing import Dict, Type
__author__ = 'Artur Barseghyan'
__copyright__ = '2013-2019 Artur Barseghyan'
__license__ = 'MPL-1.1 OR GPL-2.0-only OR LGPL-2.1-or-later'
__all__ = (
'Registry',
)
class Registry(type):
"""Base registry."""
REGISTRY: Dict[str, Type]
def __new__(cls, name, bases, attrs):
new_cls = type.__new__(cls, name, bases, attrs)
# Here the name of the class is used as key but it could be any class
# parameter.
if getattr(new_cls, '_uid', None):
cls.REGISTRY[new_cls._uid] = new_cls
return new_cls
@property
def _uid(cls) -> str:
return getattr(cls, 'uid', cls.__name__)
@classmethod
def reset(cls) -> None:
cls.REGISTRY = {}
@classmethod
def get(cls, key, default=None):
return cls.REGISTRY.get(key, default)
@classmethod
def items(cls):
return cls.REGISTRY.items()
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