1 # Copyright 2014, Tresys Technology, LLC 2 # 3 # This file is part of SETools. 4 # 5 # SETools is free software: you can redistribute it and/or modify 6 # it under the terms of the GNU Lesser General Public License as 7 # published by the Free Software Foundation, either version 2.1 of 8 # the License, or (at your option) any later version. 9 # 10 # SETools is distributed in the hope that it will be useful, 11 # but WITHOUT ANY WARRANTY; without even the implied warranty of 12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 # GNU Lesser General Public License for more details. 14 # 15 # You should have received a copy of the GNU Lesser General Public 16 # License along with SETools. If not, see 17 # <http://www.gnu.org/licenses/>. 18 # 19 from . import exception 20 from . import symbol 21 from . import objclass 22 23 24 class PolicyRule(symbol.PolicySymbol): 25 26 """This is base class for policy rules.""" 27 28 def __str__(self): 29 raise NotImplementedError 30 31 @property 32 def ruletype(self): 33 """The rule type for the rule.""" 34 return self.qpol_symbol.rule_type(self.policy) 35 36 @property 37 def source(self): 38 """ 39 The source for the rule. This should be overridden by 40 subclasses. 41 """ 42 raise NotImplementedError 43 44 @property 45 def target(self): 46 """ 47 The target for the rule. This should be overridden by 48 subclasses. 49 """ 50 raise NotImplementedError 51 52 @property 53 def tclass(self): 54 """The object class for the rule.""" 55 return objclass.class_factory(self.policy, self.qpol_symbol.object_class(self.policy)) 56 57 @property 58 def default(self): 59 """ 60 The default for the rule. This should be overridden by 61 subclasses. 62 """ 63 raise NotImplementedError 64 65 @property 66 def conditional(self): 67 """The conditional expression for this rule.""" 68 # Most rules cannot be conditional. 69 raise exception.RuleNotConditional 70 71 def statement(self): 72 return str(self) 73
