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entity.py
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45 lines (36 loc) · 1.44 KB
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# Copyright 2022 The FeatHub Authors
#
# 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
#
# https://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 abc import ABC, abstractmethod
import json
from typing import Dict
class Entity(ABC):
"""An entity is the primary node to make up a metadata graph.
An entity can refer to e.g. a dataset or a user. The concept is similar to
the entity defined in the DataHub metadata model
(https://github.com/datahub-project/datahub/blob/master/docs/modeling/metadata-model.md).
"""
def __init__(self) -> None:
pass
@abstractmethod
def to_json(self) -> Dict:
"""
Returns a json-formatted object representing this entity.
"""
pass
def __str__(self) -> str:
return json.dumps(self.to_json(), indent=2, sort_keys=True)
def __repr__(self) -> str:
return self.__str__()
def __eq__(self, other: object) -> bool:
return isinstance(other, self.__class__) and self.to_json() == other.to_json()