def setInternalLabelProperty(self, prop):
if self.isValidLabelProperty(prop): # raises exception if not
if self.internallabelprop not in [prop, None]:
raise pynt.ConsistencyException(
"Layer %s has internal label property %s, can not override it to %s"
% (self, self.internallabelprop, prop))
self.internallabelprop = prop
def isValidLabelProperty(self, prop):
"""Raises an error if the given property would not be consistent with the current label
properties, or with a label property in the first place"""
curlabeltype = self.getLabelType()
assert (isinstance(prop, Property))
assert (isinstance(prop.range,
LabelSet)) # or prop.range in [int, str])
if not prop.incompatible:
raise pynt.ConsistencyException(
"Label property %s must have incompatible flag set to True." %
(prop))
elif curlabeltype not in [None, prop.range]:
raise pynt.ConsistencyException(
"Can't set label property %s with labelset %s: The labelset of layer %s is already set to %s"
% (prop, prop.range, self.getName(), curlabeltype))
return True