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Preview: descriptors.py Size: 1.60 KB

/lib64/python3.6/site-packages/setools/diff/descriptors.py

# Copyright 2015, Tresys Technology, LLC
#
# This file is part of SETools.
#
# SETools is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation, either version 2.1 of
# the License, or (at your option) any later version.
#
# SETools is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with SETools.  If not, see
# <http://www.gnu.org/licenses/>.
#
from weakref import WeakKeyDictionary


class DiffResultDescriptor:

    """Descriptor for managing diff results."""

    # @properties could be used instead, but there are so
    # many result attributes, this will keep the code cleaner.

    def __init__(self, diff_function):
        self.diff_function = diff_function

        # use weak references so instances can be
        # garbage collected, rather than unnecessarily
        # kept around due to this descriptor.
        self.instances = WeakKeyDictionary()

    def __get__(self, obj, objtype=None):
        if obj is None:
            return self

        if self.instances.setdefault(obj, None) is None:
            diff = getattr(obj, self.diff_function)
            diff()

        return self.instances[obj]

    def __set__(self, obj, value):
        self.instances[obj] = value

    def __delete__(self, obj):
        self.instances[obj] = None

Name	Size	Perms	Modified	Actions
__pycache__ DIR	-	drwxr-xr-x	2025-03-30 04:21:30	Edit Download recursive recursive
bool.py	2.83 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
bounds.py	4.10 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
commons.py	2.82 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
conditional.py	1.68 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
constraints.py	8.64 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
context.py	1.89 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
default.py	4.14 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
descriptors.py	1.60 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
difference.py	5.66 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
fsuse.py	3.11 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
genfscon.py	3.25 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
ibendportcon.py	3.28 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
ibpkeycon.py	3.29 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
initsid.py	2.48 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
mls.py	10.31 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
mlsrules.py	4.80 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
netifcon.py	3.71 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
nodecon.py	3.21 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
objclass.py	3.60 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
polcap.py	1.70 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
portcon.py	3.19 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
properties.py	2.33 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
rbacrules.py	6.42 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
roles.py	3.20 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
terules.py	23.71 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
typeattr.py	3.28 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
types.py	4.86 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
users.py	5.40 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
__init__.py	3.15 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive

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