def preflight(self):
super(_IPOperator, self).preflight()
for operatorName in self.operatorNames:
self.operatorComponents[operatorName] = {}
sharedCodeBlock = self.parent.sharedCodeBlock
operatorTargetPairs = CodeParser.targetComponentsForOperatorsInString(self.operatorNames, sharedCodeBlock)
operatorNamesUsed = set()
operatorNames = set(self.operatorNames)
integrationVectors = self.parent.deltaAOperator.integrationVectors
field = self.field
legalTargetComponentNames = set()
for v in integrationVectors:
legalTargetComponentNames.update(v.components)
targetComponentNamesUsed = set()
indexAccessedVariables = None
# We loop over this in reverse order as we will be modifying the code string. So in order to not have to
# re-run targetComponentsForOperatorsInString after each modification, we loop over the operatorTargetPairs in
# reverse order so that slices (character index ranges) for earlier operator-target pairs don't change
for operatorName, target, codeSlice in reversed(operatorTargetPairs):
operatorNamesUsed.add(operatorName)
# Target is what is inside the square brackets in the integration code block
# As this is the IP operator, we have a few additional constraints
# Firstly, the targets must be of the form 'phi' or 'phi[j,k][m,n]'
# where j, k, m, n are the names of the integer dimension
if target in legalTargetComponentNames:
# Everything is OK
componentName = target
else:
if indexAccessedVariables == None:
indexAccessedVariables = CodeParser.nonlocalDimensionAccessForVectors(
integrationVectors, sharedCodeBlock
)
try:
# This will extract the componentName corresponding to the indexed variable in the target
# or it will fail because it isn't of that form.
componentName, resultDict = [
(l[0], l[2]) for l in indexAccessedVariables if sharedCodeBlock.codeString[l[3]] == target
][0]
except IndexError:
# Target didn't match something of the form 'phi[j, k][m+3,n-9]'
raise ParserException(
self.xmlElement,
"IP operators can only act on components of integration vectors. "
"The '%(operatorName)s' operator acting on '%(target)s' doesn't seem to be of the right form "
"or '%(target)s' isn't in one of the integration vectors." % locals(),
)
# Check that nonlocally-accessed dimensions are being accessed with the dimension names
# i.e. of the form 'phi(j: j, k:k, m:m, n:n)' not 'phi(j: j-7, k: k*2, m: 3, n: n+1)'
for dimName, (indexString, codeSlice) in resultDict.iteritems():
if not dimName == indexString:
raise ParserException(
self.xmlElement,
"IP operators can only act on every value of a dimension. "
"The problem was caused by the '%(operatorName)s' operator acting on '%(target)s'. "
"EX operators do not have this restriction." % locals(),
)
if componentName in targetComponentNamesUsed:
raise ParserException(
self.xmlElement,
"Check the documentation, only one IP operator can act on a given component, "
"and this operator can only appear once. "
"The problem was with the '%(componentName)s' term appearing more than once in an IP operator. "
"You may be able to accomplish what you are trying with an EX operator." % locals(),
)
targetComponentNamesUsed.add(componentName)
# Now we need to get the vector corresponding to componentName
tempVectorList = [v for v in integrationVectors if componentName in v.components]
assert len(tempVectorList) == 1
targetVector = tempVectorList[0]
# We have our match, now we need to create the operatorComponents dictionary
if not targetVector in self.operatorComponents[operatorName]:
self.operatorComponents[operatorName][targetVector] = [componentName]
else:
self.operatorComponents[operatorName][targetVector].append(componentName)
if targetVector.type == "real":
self.operatorVector.type = "real"
# Check the sanity of the integration code.
# i.e. check that we don't have something of the form:
# dy_dt = L[x].
# Obviously the user could hide this from us, but if we can check the most
# common case that frequently goes wrong, then we should.
CodeParser.performIPOperatorSanityCheck(
componentName, self.propagationDimension, codeSlice, sharedCodeBlock
)
# Replace the L[x] string with 0.0
sharedCodeBlock.codeString = (
sharedCodeBlock.codeString[: codeSlice.start] + "0.0" + sharedCodeBlock.codeString[codeSlice.stop :]
)
# If any operator names weren't used in the code, issue a warning
unusedOperatorNames = operatorNames.difference(operatorNamesUsed)
if unusedOperatorNames:
unusedOperatorNamesString = ", ".join(unusedOperatorNames)
parserWarning(
self.xmlElement, "The following operator names weren't used: %(unusedOperatorNamesString)s" % locals()
)
del self.functions["evaluate"]
vectors = set(self.targetVectors)
self.registerVectorsRequiredInBasis(vectors, self.parent.ipOperatorBasis)
