def convert_problem(args,
target_problem_type,
valid_problem_types,
has_capability=lambda x: False,
**kwds):
"""
Convert a problem, defined by the 'args' tuple, into another
problem.
"""
if len(valid_problem_types) == 0:
raise ConverterError("No valid problem types")
if not (target_problem_type is None or \
target_problem_type in valid_problem_types):
msg = "Problem type '%s' is not valid"
raise ConverterError(msg % str(target_problem_type))
if len(args) == 0:
raise ConverterError("Empty argument list")
#
# Setup list of source problem types
#
tmp = args[0]
if isinstance(tmp, str):
fname = tmp.split(os.sep)[-1]
if os.sep in fname: #pragma:nocover
fname = tmp.split(os.sep)[-1]
source_ptype = [guess_format(fname)]
if source_ptype is [None]:
raise ConverterError("Unknown suffix type: " + tmp)
else:
source_ptype = args[0].valid_problem_types()
#
# Setup list of valid problem types
#
valid_ptypes = copy.copy(valid_problem_types)
if target_problem_type is not None:
valid_ptypes.remove(target_problem_type)
valid_ptypes = [target_problem_type] + valid_ptypes
if source_ptype[0] in valid_ptypes:
valid_ptypes.remove(source_ptype[0])
valid_ptypes = [source_ptype[0]] + valid_ptypes
#
# Iterate over the valid problem types, starting with the target type
#
# Apply conversion and return for first match
#
for ptype in valid_ptypes:
for s_ptype in source_ptype:
#
# If the source and target types are equal, then simply the return
# the args (return just the first element of the tuple if it has length
# one.
#
if s_ptype == ptype:
return (args, ptype, None)
#
# Otherwise, try to convert
#
for name in ProblemConverterFactory:
converter = ProblemConverterFactory(name)
if converter.can_convert(s_ptype, ptype):
tmp = [s_ptype, ptype] + list(args)
tmp = tuple(tmp)
# propagate input keywords to the converter
tmpkw = kwds
tmpkw['capabilities'] = has_capability
problem_files, symbol_map = converter.apply(*tmp, **tmpkw)
return problem_files, ptype, symbol_map
msg = 'No conversion possible. Source problem type: %s. Valid target ' \
'types: %s'
raise ConverterError(msg %
(str(source_ptype[0]), list(map(str, valid_ptypes))))
def convert_problem(args,
target_problem_type,
valid_problem_types,
has_capability=lambda x: False,
**kwds):
"""
Convert a problem, defined by the 'args' tuple, into another
problem.
"""
if len(valid_problem_types) == 0:
raise ConverterError("No valid problem types")
if not (target_problem_type is None or \
target_problem_type in valid_problem_types):
msg = "Problem type '%s' is not valid"
raise ConverterError(msg % str( target_problem_type ))
if len(args) == 0:
raise ConverterError("Empty argument list")
#
# Setup list of source problem types
#
tmp = args[0]
if isinstance(tmp,basestring):
fname = tmp.split(os.sep)[-1]
if os.sep in fname: #pragma:nocover
fname = tmp.split(os.sep)[-1]
source_ptype = [guess_format(fname)]
if source_ptype is [None]:
raise ConverterError("Unknown suffix type: "+tmp)
else:
source_ptype = args[0].valid_problem_types()
#
# Setup list of valid problem types
#
valid_ptypes = copy.copy(valid_problem_types)
if target_problem_type is not None:
valid_ptypes.remove(target_problem_type)
valid_ptypes = [target_problem_type] + valid_ptypes
if source_ptype[0] in valid_ptypes:
valid_ptypes.remove(source_ptype[0])
valid_ptypes = [source_ptype[0]] + valid_ptypes
#
# Iterate over the valid problem types, starting with the target type
#
# Apply conversion and return for first match
#
for ptype in valid_ptypes:
for s_ptype in source_ptype:
#
# If the source and target types are equal, then simply the return
# the args (return just the first element of the tuple if it has length
# one.
#
if s_ptype == ptype:
return (args,ptype,None)
#
# Otherwise, try to convert
#
for converter in ExtensionPoint(IProblemConverter):
if converter.can_convert(s_ptype, ptype):
tmp = [s_ptype,ptype] + list(args)
tmp = tuple(tmp)
# propagate input keywords to the converter
tmpkw = kwds
tmpkw['capabilities'] = has_capability
problem_files, symbol_map = converter.apply(*tmp, **tmpkw)
return problem_files, ptype, symbol_map
msg = 'No conversion possible. Source problem type: %s. Valid target ' \
'types: %s'
raise ConverterError(msg % (str(source_ptype[0]), list(map(str, valid_ptypes))))