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__author__ = "Kristian B. Oelgaard (k.b.oelgaard@tudelft.nl) and Anders Logg (logg@simula.no)"
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__date__ = "2009-03-06 -- 2009-08-26"
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__copyright__ = "Copyright (C) 2009 Kristian B. Oelgaard and Anders Logg"
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__license__ = "GNU GPL version 3 or any later version"
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# Modified by Garth N. Wells 2009
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from ufl import FiniteElement as UFLFiniteElement
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from ufl import MixedElement as UFLMixedElement
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from ufl import ElementRestriction as UFLElementRestriction
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from ufl import TensorElement as UFLTensorElement
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from ffc.common.log import debug, error
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from finiteelement import FiniteElement as FFCFiniteElement
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from mixedelement import MixedElement as FFCMixedElement
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from quadratureelement import QuadratureElement as FFCQuadratureElement
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# Cache for computed elements
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def create_element(ufl_element, domain=None):
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"Create FFC element (wrapper for FIAT element) from UFL element."
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if ufl_element in _cache:
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debug("Found element in element cache: " + str(ufl_element))
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return _cache[ufl_element]
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# Save the element that we'll use as hash
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ufl_element_hash = ufl_element
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if isinstance(ufl_element, UFLElementRestriction):
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# If we already have a domain, make sure that it is equal to the domain
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# of the restricted element
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if domain and domain != ufl_element.domain():
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error("Domain of restriction is not equal to the domain of the already restricted element. %s %s"\
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%(str(domain), str(ufl_element.domain())))
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# Get element and domain
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domain = ufl_element.domain()
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ufl_element = ufl_element.element()
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# Create equivalent FFC element
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if isinstance(ufl_element, UFLFiniteElement):
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if ufl_element.family() == "Quadrature":
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ffc_element = FFCQuadratureElement(ufl_element, domain)
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ffc_element = FFCFiniteElement(ufl_element, domain)
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elif isinstance(ufl_element, UFLMixedElement):
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sub_elements = [create_element(e, domain) for e in ufl_element.sub_elements()]
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ffc_element = FFCMixedElement(sub_elements, repr(ufl_element), domain)
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# FIXME: Temporary hack to 'support' tensor elements
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if isinstance(ufl_element, UFLTensorElement):
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ffc_element._rank = len(ufl_element._shape)
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error("Unable to create equivalent FIAT element: %s" % str(ufl_element))
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# Add element to cache
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_cache[ufl_element_hash] = ffc_element
added
removed
ffc/fem/createelement.py
