# Copyright 2014-2015, Tresys Technology, LLC # Copyright 2018, Chris PeBenito <pebenito@ieee.org> # # SPDX-License-Identifier: LGPL-2.1-only # from abc import ABC, abstractmethod from logging import Logger from typing import Iterable from .policyrep import SELinuxPolicy class PolicyQuery(ABC): """Abstract base class for SELinux policy queries.""" log: Logger policy: SELinuxPolicy def __init__(self, policy: SELinuxPolicy, **kwargs) -> None: self.policy = policy # keys are sorted in reverse order so regex settings # are set before the criteria, e.g. name_regex # is set before name. This ensures correct behavior # since the criteria descriptors are sensitve to # regex settings. for name in sorted(kwargs.keys(), reverse=True): attr = getattr(self, name, None) # None is not callable if callable(attr): raise ValueError("Keyword parameter {0} conflicts with a callable.".format(name)) setattr(self, name, kwargs[name]) @abstractmethod def results(self) -> Iterable: """ Generator which returns the matches for the query. This method should be overridden by subclasses. """ pass