internal void CalculateStateTransition(StateActivity currentState, string targetStateName)
{
if (currentState == null)
{
throw new ArgumentNullException("currentState");
}
if (String.IsNullOrEmpty(targetStateName))
{
throw new ArgumentNullException("targetStateName");
}
while (currentState != null && (currentState.QualifiedName.Equals(targetStateName) || !StateMachineHelpers.ContainsState(currentState, targetStateName)))
{
CloseStateAction action = new CloseStateAction(currentState.QualifiedName);
this.Actions.Enqueue(action);
currentState = currentState.Parent as StateActivity;
}
if (currentState == null)
{
throw new InvalidOperationException(SR.GetUnableToTransitionToState(targetStateName));
}
while (!currentState.QualifiedName.Equals(targetStateName))
{
foreach (Activity childActivity in currentState.EnabledActivities)
{
StateActivity childState = childActivity as StateActivity;
if (childState != null)
{
//
if (StateMachineHelpers.ContainsState(childState, targetStateName))
{
ExecuteChildStateAction action = new ExecuteChildStateAction(currentState.QualifiedName, childState.QualifiedName);
this.Actions.Enqueue(action);
currentState = childState;
break;
}
}
}
}
if (!StateMachineHelpers.IsLeafState(currentState))
{
throw new InvalidOperationException(SR.GetInvalidStateTransitionPath());
}
}