Coverage for python / lsst / ctrl / execute / namedClassFactory.py: 21%

1# This file is part of ctrl_execute. 

2# 

3# Developed for the LSST Data Management System. 

4# This product includes software developed by the LSST Project 

5# (https://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 <https://www.gnu.org/licenses/>. 

27 

28 

29class NamedClassFactory: 

30 """Create a new "name" class object 

31 

32 Parameters 

33 ---------- 

34 name : `str` 

35 the fully qualified name of an object 

36 

37 Returns 

38 ------- 

39 classobj : `object` 

40 an object of the specified name 

41 """ 

42 

43 @staticmethod 

44 def createClass(name): 

45 dot = name.rindex(".") 

46 pack = name[0:dot] 

47 modname = name[dot + 1 :] 

48 modname = modname[0].capitalize() + modname[1:] 

49 # -1 is no longer accepted in python 3 

50 # module = __import__(name, globals(), locals(), [modname], -1) 

51 module = __import__(name, globals(), locals(), [modname], 0) 

52 classobj = getattr(module, modname) 

53 if classobj is None: 

54 raise RuntimeError(f"Attempt to instantiate class {name!r} failed. Could not find that class.") 

55 return classobj