def __init__(self, name=None, source=None, target=None, guard=None):
# TODO: bool(source) evals to False if IControlNode.providedBy(source)
if IActivityNode.providedBy(source):
self.source = source
if IActivityNode.providedBy(target):
self.target = target
self.guard = guard
super(ActivityEdge, self).__init__(name)
def check_model_constraints(self):
super(ActivityEdge, self).check_model_constraints()
try:
assert self.source or self.target is not None
except AssertionError:
raise ModelIllFormedException,\
str(self) + " " +\
"An ActivityEdge must have source and target set"
# [1]
try:
assert self.source.activity is self.target.activity
except AssertionError:
raise ModelIllFormedException,\
str(self) + " " +\
"Source and target must be in the same activity"
# [2]
try:
assert self.__parent__ is not None
assert IActivity.providedBy(self.__parent__)
except AssertionError:
raise ModelIllFormedException,\
str(self) + " " +\
"An ActivityEdge must have an Activity as parent"
try:
assert IActivityNode.providedBy(self.source)
except AssertionError:
raise ModelIllFormedException,\
str(self) + " " +\
"An ActivityEdge must have an ActivityNode as source"
try:
assert IActivityNode.providedBy(self.target)
except AssertionError:
raise ModelIllFormedException,\
str(self) + " " +\
"An ActivityEdge must have an ActivityNode as target"