def _toAtomSequence(aSequence):
prevMultifieldCount = 0
returnSequence = []
for fieldIndex, fieldContent in enumerate(aSequence):
atomLocation = AtomLocation()
isMultiField = _isMultifield(fieldContent)
if prevMultifieldCount and isMultiField:
raise MyClipsException("Two multifields in a single expression found!")
# calculate position from the end
if prevMultifieldCount == 0:
atomLocation.beginIndex = fieldIndex
atomLocation.fromBegin = True
if prevMultifieldCount > 0 or isMultiField :
atomLocation.endIndex = len(aSequence) - fieldIndex - 1
atomLocation.fromEnd = True
if isMultiField:
prevMultifieldCount += 1
atomLocation.isMultiField = True
returnSequence.append((atomLocation, fieldContent))
return returnSequence
def _patternToAtomLocations(aPatternCE, patternIndex):
if isinstance(aPatternCE, types.OrderedPatternCE):
returnSequence = _toAtomSequence(aPatternCE.constraints)
for atomLocation, _ in returnSequence:
atomLocation.patternIndex = patternIndex
return returnSequence
elif isinstance(aPatternCE, types.TemplatePatternCE):
returnSequence = []
for slot in aPatternCE.templateSlots:
if isinstance(slot, types.SingleFieldLhsSlot):
# easy to handle: convert the location to a atom location with a field element
atomLocation = AtomLocation()
atomLocation.slotName = slot.slotName
atomLocation.fullSlot = True
atomLocation.patternIndex = patternIndex
returnSequence.append((atomLocation, slot.slotValue))
else:
multifieldSequence = _toAtomSequence(slot.slotValue)
for atomLocation, _ in multifieldSequence:
atomLocation.patternIndex = patternIndex
atomLocation.slotName = slot.slotName
returnSequence += multifieldSequence
return returnSequence
else:
raise ValueError("Invalid aPatternCE types: %s"%aPatternCE.__class__.__name__)
