# Copyright 2019 Capital One Services, LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from c7n.exceptions import PolicyValidationError
from .core import Filter, ValueFilter
[docs]class MultiAttrFilter(Filter):
multi_attrs = set()
[docs] def validate(self):
delta = set(self.data.keys()).difference(self.multi_attrs)
delta.remove('type')
if 'match-operator' in delta:
delta.remove('match-operator')
if delta:
raise PolicyValidationError(
"filter:{} unknown keys {} on {}".format(
self.type, ", ".join(delta), self.manager.data))
[docs] def process(self, resources, event=None):
matched = []
attr_filters = list(self.get_attr_filters())
match_op = self.data.get('match-operator', 'and') == 'and' and all or any
for r in resources:
target = self.get_target(r)
if match_op([bool(af(target)) for af in attr_filters]):
matched.append(r)
return matched
[docs] def get_target(self, resource):
"""Return the resource, or related resource that should be attribute matched.
"""
return resource
[docs] def get_attr_filters(self):
"""Return an iterator resource attribute filters configured.
"""
for f in self.data.keys():
if f not in self.multi_attrs:
continue
fv = self.data[f]
if isinstance(fv, dict):
fv['key'] = f
else:
fv = {f: fv}
vf = ValueFilter(fv)
vf.annotate = False
yield vf