public bool Emit()
{
#region Emit Conditions Check
// check emit conditions, it is enough to pass if one of the conditions is met. This allows to make OR logical comparisons between SignalEmitConditions.
bool emitConditionMet = SignalEmitConditions.Count > 0 ? false : true;
foreach (ISignalCondition signalCondition in SignalEmitConditions)
{
if (signalCondition.IsValid)
{
emitConditionMet = true;
}
}
if (!emitConditionMet)
{
SignalNotProcessedEventArgs eventArgs = new SignalNotProcessedEventArgs(SignalFailure.EmitConditionsNotMet, SignalEmitConditions.ToList <ISignalCondition>());
if (OnSignalNotProcessed != null)
{
OnSignalNotProcessed.Invoke(eventArgs);
}
return(false);
}
#endregion
#region Transition Conditions Check
// check transition conditions, there must be only one valid transition. If more than one, stop emitting the signal, otherwise this might cause undefined behaviour.
int conditionMetCount = SignalTransitionConditions.Count != 0 ? 0 : 1;
foreach (KeyValuePair <SignalCondition <S, T, G>, Transition <S, T, G> > pair in SignalTransitionConditions)
{
if (pair.Key.IsValid)
{
pair.Value.CanTransition = true;
conditionMetCount++;
}
else
{
pair.Value.CanTransition = false;
}
}
if (conditionMetCount == 0)
{
SignalNotProcessedEventArgs eventArgs = new SignalNotProcessedEventArgs(SignalFailure.TransitionConditionsNotMet, SignalTransitionConditions.Keys.ToList <ISignalCondition>());
if (OnSignalNotProcessed != null)
{
OnSignalNotProcessed.Invoke(eventArgs);
}
return(false);
}
else if (conditionMetCount > 1)
{
SignalNotProcessedEventArgs eventArgs = new SignalNotProcessedEventArgs(SignalFailure.TransitionAmbiguity, SignalTransitionConditions.Keys.ToList <ISignalCondition>());
if (OnSignalNotProcessed != null)
{
OnSignalNotProcessed.Invoke(eventArgs);
}
return(false);
}
#endregion
#region Process Signal
if (!stateMachine.ProcessSignal(this))
{
SignalNotProcessedEventArgs eventArgs = new SignalNotProcessedEventArgs(SignalFailure.NoTransitionToState);
if (OnSignalNotProcessed != null)
{
OnSignalNotProcessed.Invoke(eventArgs);
}
return(false);
}
return(true);
#endregion
}
internal void AddEmitCondition(SignalCondition <S, T, G> condition)
{
SignalEmitConditions.Add(condition);
}
