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1# This file is part of pex_config. 

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 software is dual licensed under the GNU General Public License and also 

10# under a 3-clause BSD license. Recipients may choose which of these licenses 

11# to use; please see the files gpl-3.0.txt and/or bsd_license.txt, 

12# respectively. If you choose the GPL option then the following text applies 

13# (but note that there is still no warranty even if you opt for BSD instead): 

14# 

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

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

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

18# (at your option) any later version. 

19# 

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

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

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

23# GNU General Public License for more details. 

24# 

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

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

27 

28__all__ = ('makePropertySet',) 

29 

30try: 

31 import lsst.daf.base as dafBase 

32except ImportError: 

33 dafBase = None 

34 

35 

36def makePropertySet(config): 

37 """Convert a configuration into a `lsst.daf.base.PropertySet`. 

38 

39 Parameters 

40 ---------- 

41 config : `lsst.pex.config.Config` 

42 Configuration instance. 

43 

44 Returns 

45 ------- 

46 propertySet : `lsst.daf.base.PropertySet` 

47 A `~lsst.daf.base.PropertySet` that is equivalent to the ``config`` 

48 instance. If ``config`` is `None` then this return value is also 

49 `None`. 

50 

51 See also 

52 -------- 

53 lsst.daf.base.PropertySet 

54 """ 

55 if dafBase is None: 

56 raise RuntimeError("lsst.daf.base is not available") 

57 

58 def _helper(ps, prefix, dict_): 

59 for k, v in dict_.items(): 

60 name = prefix + "." + k if prefix is not None else k 

61 if isinstance(v, dict): 

62 _helper(ps, name, v) 

63 elif v is not None: 

64 ps.set(name, v) 

65 

66 if config is not None: 

67 ps = dafBase.PropertySet() 

68 _helper(ps, None, config.toDict()) 

69 return ps 

70 else: 

71 return None