def _determine_next_flow(self, data):
"""
根据当前传入的数据判断下一个应该流向的 flow
:param data:
:return:
"""
for condition in self.conditions:
try:
local = {
'result':
eval(condition.source_key, {},
{'data': data.get_outputs()})
}
except KeyError:
raise SourceKeyException(
'%s does not exist in %s' %
(condition.source_key, data.get_outputs()))
try:
result = eval(condition.evaluate, {}, local)
except Exception as e:
raise EvaluationException('%s fail with message: %s' %
(condition.evaluate, e.message))
if result:
return condition.sequence_flow
return None
def targets_meet_condition(self, data):
targets = []
for condition in self.conditions:
deformatted_data = {
deformat_constant_key(key): value
for key, value in data.items()
}
try:
resolved_evaluate = ConstantTemplate(
condition.evaluate).resolve_data(deformatted_data)
result = BoolRule(resolved_evaluate).test(data)
except Exception as e:
raise EvaluationException(
'evaluate[%s] fail with data[%s] message: %s' %
(condition.evaluate, json.dumps(deformatted_data),
e.message))
if result:
targets.append(condition.sequence_flow.target)
if not targets:
raise ConditionExhaustedException(
'all conditions of branches are False')
return targets
def _determine_next_flow_with_boolrule(self, data):
"""
根据当前传入的数据判断下一个应该流向的 flow （ 不使用 eval 的版本）
:param data:
:return:
"""
for condition in self.conditions:
try:
result = BoolRule(condition.evaluate).test(data)
except Exception as e:
raise EvaluationException(
'evaluate[%s] fail with data[%s] message: %s' %
(condition.evaluate, json.dumps(data), e.message))
if result:
return condition.sequence_flow
return None
def _determine_next_flow_with_boolrule(self, data):
"""
根据当前传入的数据判断下一个应该流向的 flow （ 不使用 eval 的版本）
:param data:
:return:
"""
for condition in self.conditions:
deformatted_data = {deformat_constant_key(key): value for key, value in data.items()}
try:
resolved_evaluate = ConstantTemplate(condition.evaluate).resolve_data(deformatted_data)
result = BoolRule(resolved_evaluate).test(data)
except Exception as e:
raise EvaluationException(
'evaluate[%s] fail with data[%s] message: %s' % (
condition.evaluate,
json.dumps(deformatted_data),
e.message
)
)
if result:
return condition.sequence_flow
return None