# ___________________________________________________________________________
#
# Pyomo: Python Optimization Modeling Objects
# Copyright (c) 2008-2024
# National Technology and Engineering Solutions of Sandia, LLC
# Under the terms of Contract DE-NA0003525 with National Technology and
# Engineering Solutions of Sandia, LLC, the U.S. Government retains certain
# rights in this software.
# This software is distributed under the 3-clause BSD License.
# ___________________________________________________________________________
import logging
from pyomo.common import Factory
from pyomo.common.plugin_base import PluginError
logger = logging.getLogger('pyomo.core')
[docs]
class UnknownDataManager(object):
[docs]
def __init__(self, *args, **kwds):
#
# The 'type' is the class type of the solver instance
#
self.type = kwds["type"]
def available(self):
return False
[docs]
class DataManagerFactoryClass(Factory):
#
# This is the custom __call__ method
#
def __call__(self, _name=None, args=[], **kwds):
if _name is None:
return self
_name = str(_name)
if _name in self._cls:
dm = self._cls[_name](**kwds)
if not dm.available():
raise PluginError(
"Cannot process data in %s files. The following python packages need to be installed: %s"
% (_name, dm.requirements())
)
else:
dm = UnknownDataManager(type=_name)
return dm
DataManagerFactory = DataManagerFactoryClass('data file')