public void signal()
{
var processInstance = _taskInstance.getProcessInstance();
var bpmContext = processInstance.getBpmContext();
var task = _taskInstance.getTask();
var transitions = task.LeavingTransitions;
if (transitions.Count == 0)
{
_taskInstance.end().save();
return;
}
//每次只走一条transition
int excuteTransitionCount = 0;
foreach (Transition transition in transitions)
{
//Token的Signal操作表示：实例需要离开当前token所在的节点，转移到下一个节点上。
//因为Node与Node之间是“Transition”这个桥梁，
//所以，在转移过程中，会首先把Token放入相关连的Transtion对象中，
//再由Transition对象把Token交给下一个节点。
var transitionInstance = transition.createTransitionInstance(_taskInstance);
if (excuteTransitionCount == 0 && transitionInstance.validate())
{
excuteTransitionCount++;
_taskInstance.leave(transitionInstance, this);
}
}
//没有线满足时，默认无条件走第一条
if (excuteTransitionCount == 0)
{
var firstTransition = (Transition)transitions[0];
var transitionInstance = firstTransition.createTransitionInstance(_taskInstance);
_taskInstance.leave(transitionInstance, this);
}
}
