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1# This file is part of daf_butler. 

2# 

3# Developed for the LSST Data Management System. 

4# This product includes software developed by the LSST Project 

5# (http://www.lsst.org). 

6# See the COPYRIGHT file at the top-level directory of this distribution 

7# for details of code ownership. 

8# 

9# This program is free software: you can redistribute it and/or modify 

10# it under the terms of the GNU General Public License as published by 

11# the Free Software Foundation, either version 3 of the License, or 

12# (at your option) any later version. 

13# 

14# This program is distributed in the hope that it will be useful, 

15# but WITHOUT ANY WARRANTY; without even the implied warranty of 

16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

17# GNU General Public License for more details. 

18# 

19# You should have received a copy of the GNU General Public License 

20# along with this program. If not, see <http://www.gnu.org/licenses/>. 

21 

22from __future__ import annotations 

23 

24from dataclasses import dataclass 

25from typing import Optional 

26 

27from .ref import DatasetRef 

28from ..timespan import Timespan 

29 

30 

31@dataclass 

32class DatasetAssociation: 

33 """A struct that represents the membership of a single dataset in a 

34 single collection. 

35 """ 

36 

37 __slots__ = ("ref", "collection", "timespan") 

38 

39 ref: DatasetRef 

40 """Resolved reference to a dataset (`DatasetRef`). 

41 """ 

42 

43 collection: str 

44 """Name of a collection (`str`). 

45 """ 

46 

47 timespan: Optional[Timespan] 

48 """Validity range of the dataset if this is a `~CollectionType.CALIBRATION` 

49 collection (`Timespan` or `None`). 

50 """