| # |
| # 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 __future__ import annotations |
| |
| from enum import Enum |
| |
| from airflow.compat.functools import cache |
| |
| |
| class WeightRule(str, Enum): |
| """Weight rules.""" |
| |
| DOWNSTREAM = "downstream" |
| UPSTREAM = "upstream" |
| ABSOLUTE = "absolute" |
| |
| @classmethod |
| def is_valid(cls, weight_rule: str) -> bool: |
| """Check if weight rule is valid.""" |
| return weight_rule in cls.all_weight_rules() |
| |
| @classmethod |
| @cache |
| def all_weight_rules(cls) -> set[str]: |
| """Returns all weight rules.""" |
| return set(cls.__members__.values()) |
| |
| def __str__(self) -> str: |
| return self.value |