| Dir : /proc/self/root/opt/saltstack/salt/lib/python3.10/site-packages/salt/utils/ |
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| Dir : //proc/self/root/opt/saltstack/salt/lib/python3.10/site-packages/salt/utils/immutabletypes.py |
"""
:codeauthor: Pedro Algarvio (pedro@algarvio.me)
salt.utils.immutabletypes
~~~~~~~~~~~~~~~~~~~~~~~~~
Immutable types
"""
import copy
from collections.abc import Mapping, Sequence, Set
class ImmutableDict(Mapping):
"""
An immutable dictionary implementation
"""
def __init__(self, obj):
self.__obj = obj
def __len__(self):
return len(self.__obj)
def __iter__(self):
return iter(self.__obj)
def __getitem__(self, key):
return freeze(self.__obj[key])
def __repr__(self):
return f"<{self.__class__.__name__} {repr(self.__obj)}>"
def __deepcopy__(self, memo):
return copy.deepcopy(self.__obj)
def copy(self):
"""
Return an un-frozen copy of self
"""
return copy.deepcopy(self.__obj)
class ImmutableList(Sequence):
"""
An immutable list implementation
"""
def __init__(self, obj):
self.__obj = obj
def __len__(self):
return len(self.__obj)
def __iter__(self):
return iter(self.__obj)
def __add__(self, other):
return self.__obj + other
def __radd__(self, other):
return other + self.__obj
def __getitem__(self, key):
return freeze(self.__obj[key])
def __repr__(self):
return f"<{self.__class__.__name__} {repr(self.__obj)}>"
def __deepcopy__(self, memo):
return copy.deepcopy(self.__obj)
def copy(self):
"""
Return an un-frozen copy of self
"""
return copy.deepcopy(self.__obj)
class ImmutableSet(Set):
"""
An immutable set implementation
"""
def __init__(self, obj):
self.__obj = obj
def __len__(self):
return len(self.__obj)
def __iter__(self):
return iter(self.__obj)
def __contains__(self, key):
return key in self.__obj
def __repr__(self):
return f"<{self.__class__.__name__} {repr(self.__obj)}>"
def __deepcopy__(self, memo):
return copy.deepcopy(self.__obj)
def copy(self):
"""
Return an un-frozen copy of self
"""
return copy.deepcopy(self.__obj)
def freeze(obj):
"""
Freeze python types by turning them into immutable structures.
"""
if isinstance(obj, dict):
return ImmutableDict(obj)
if isinstance(obj, list):
return ImmutableList(obj)
if isinstance(obj, set):
return ImmutableSet(obj)
return obj