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# Copyright 2016, 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 .descriptors import DiffResultDescriptor
from .difference import Difference, SymbolWrapper
class PolCapsDifference(Difference):
"""Determine the difference in polcaps between two policies."""
added_polcaps = DiffResultDescriptor("diff_polcaps")
removed_polcaps = DiffResultDescriptor("diff_polcaps")
def diff_polcaps(self):
"""Generate the difference in polcaps between the policies."""
self.log.info("Generating policy cap differences from {0.left_policy} to {0.right_policy}".
format(self))
self.added_polcaps, self.removed_polcaps, _ = self._set_diff(
(SymbolWrapper(n) for n in self.left_policy.polcaps()),
(SymbolWrapper(n) for n in self.right_policy.polcaps()))
#
# Internal functions
#
def _reset_diff(self):
"""Reset diff results on policy changes."""
self.log.debug("Resetting policy capability differences")
self.added_polcaps = None
self.removed_polcaps = None