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63 lines
2.2 KiB
Python
63 lines
2.2 KiB
Python
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# -*- coding: utf-8 -*-
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# Copyright (C) 2012 Matthew Hampton
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301 USA
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from ...exceptions import WorkflowException
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from .BpmnSpecMixin import BpmnSpecMixin
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from ...specs import TaskSpec
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from ...specs.ExclusiveChoice import ExclusiveChoice
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class ExclusiveGateway(ExclusiveChoice, BpmnSpecMixin):
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"""
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Task Spec for a bpmn:exclusiveGateway node.
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"""
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def test(self):
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"""
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Checks whether all required attributes are set. Throws an exception
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if an error was detected.
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"""
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# This has been overridden to allow a single default flow out (without a
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# condition) - useful for the converging type
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TaskSpec.test(self)
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# if len(self.cond_task_specs) < 1:
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# raise WorkflowException(self, 'At least one output required.')
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for condition, name in self.cond_task_specs:
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if name is None:
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raise WorkflowException(self, 'Condition with no task spec.')
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task_spec = self._wf_spec.get_task_spec_from_name(name)
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if task_spec is None:
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msg = 'Condition leads to non-existent task ' + repr(name)
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raise WorkflowException(self, msg)
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if condition is None:
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continue
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@property
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def spec_type(self):
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return 'Exclusive Gateway'
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def serialize(self, serializer):
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return serializer.serialize_exclusive_gateway(self)
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@classmethod
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def deserialize(self, serializer, wf_spec, s_state):
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return serializer.deserialize_exclusive_gateway(wf_spec, s_state)
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