| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you 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 typing import Set |
| |
| |
| class WeightRule: |
| """Weight rules.""" |
| |
| DOWNSTREAM = 'downstream' |
| UPSTREAM = 'upstream' |
| ABSOLUTE = 'absolute' |
| |
| _ALL_WEIGHT_RULES = set() # type: Set[str] |
| |
| @classmethod |
| def is_valid(cls, weight_rule): |
| """Check if weight rule is valid.""" |
| return weight_rule in cls.all_weight_rules() |
| |
| @classmethod |
| def all_weight_rules(cls): |
| """Returns all weight rules""" |
| if not cls._ALL_WEIGHT_RULES: |
| cls._ALL_WEIGHT_RULES = { |
| getattr(cls, attr) |
| for attr in dir(cls) |
| if not attr.startswith("_") and not callable(getattr(cls, attr)) |
| } |
| return cls._ALL_WEIGHT_RULES |