1# 

2# This file is part of ap_verify. 

3# 

4# Developed for the LSST Data Management System. 

5# This product includes software developed by the LSST Project 

6# (http://www.lsst.org). 

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

8# for details of code ownership. 

9# 

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

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

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

13# (at your option) any later version. 

14# 

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

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

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

18# GNU General Public License for more details. 

19# 

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

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

22# 

23 

24from lsst.daf.persistence import Policy 

25 

26 

27# TODO: remove in DM-29042 

28class Config: 

29 """Confuration manager for ``ap_verify``. 

30 

31 This is a singleton `lsst.daf.persistence.Policy` that may be accessed 

32 from other modules in ``ap_verify`` as needed using `Config.instance`. 

33 Please do not construct objects of this class directly. 

34 

35 Objects of this type are immutable. 

36 """ 

37 

38 def __init__(self): 

39 path = Policy.defaultPolicyFile('ap_verify', 'dataset_config.yaml', 'config') 

40 self._allInfo = Policy(path) 

41 self._validate() 

42 

43 def _validate(self): 

44 """Test that the loaded configuration is correct. 

45 

46 Raises 

47 ------ 

48 RuntimeError 

49 Raised if validation failed 

50 """ 

51 try: 

52 datasetMap = self._allInfo['datasets'] 

53 if not isinstance(datasetMap, Policy): 53 ↛ 54line 53 didn't jump to line 54, because the condition on line 53 was never true

54 raise TypeError('`datasets` is not a dictionary') 

55 except (KeyError, TypeError) as e: 

56 raise RuntimeError('Invalid config file.') from e 

57 

58 def __getitem__(self, key): 

59 return self._allInfo[key] 

60 

61 def __contains__(self, key): 

62 return key in self._allInfo 

63 

64 

65Config.instance = Config() 

66"""The sole `Config` object used by the program. 

67"""