Source code for pyomo.core.plugins.transform.hierarchy

# ____________________________________________________________________________________
#
# Pyomo: Python Optimization Modeling Objects
# Copyright (c) 2008-2026 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.
# ____________________________________________________________________________________

from pyomo.core.base import Transformation



[docs]
class AbstractTransformation(Transformation):
    """
    Base class for all model transformations that produce abstract
    models.
    """


[docs]
    def __init__(self, **kwds):
        kwds["name"] = kwds.get("name", "abstract_transformation")
        super(AbstractTransformation, self).__init__(**kwds)





[docs]
class ConcreteTransformation(Transformation):
    """
    Base class for all model transformations that produce concrete
    models.
    """


[docs]
    def __init__(self, **kwds):
        kwds["name"] = kwds.get("name", "concrete_transformation")
        super(ConcreteTransformation, self).__init__(**kwds)





[docs]
class IsomorphicTransformation(Transformation):
    """
    Base class for 'lossless' transformations for which a bijective
    mapping between optimal variable values and the optimal cost
    exists.
    """


[docs]
    def __init__(self, **kwds):
        kwds["name"] = kwds.get("name", "isomorphic_transformation")
        super(IsomorphicTransformation, self).__init__(**kwds)





[docs]
class LinearTransformation(Transformation):
    """Base class for all linear model transformations."""


[docs]
    def __init__(self, **kwds):
        kwds["name"] = kwds.get("name", "linear_transform")
        super(LinearTransformation, self).__init__(**kwds)





[docs]
class NonIsomorphicTransformation(Transformation):
    """
    Base class for 'lossy' transformations for which a bijective
    mapping between optimal variable values and the optimal cost does
    not  exist.
    """


[docs]
    def __init__(self, **kwds):
        kwds["name"] = kwds.get("name", "isomorphic_transformation")
        super(NonIsomorphicTransformation, self).__init__(**kwds)





[docs]
class NonlinearTransformation(Transformation):
    """Base class for all nonlinear model transformations."""


[docs]
    def __init__(self, **kwds):
        kwds["name"] = kwds.get("name", "nonlinear_transform")
        super(NonlinearTransformation, self).__init__(**kwds)