private void HandleReentryTrigger(object[] args, StateRepresentation representativeState, Transition transition)
{
StateRepresentation representation;
transition = representativeState.Exit(transition);
var newRepresentation = GetRepresentation(transition.Destination);
if (!transition.Source.Equals(transition.Destination))
{
// Then Exit the final superstate
transition = new Transition(transition.Destination, transition.Destination, transition.Trigger, args);
newRepresentation.Exit(transition);
_onTransitionedEvent.Invoke(transition);
representation = EnterState(newRepresentation, transition, args);
_onTransitionCompletedEvent.Invoke(transition);
}
else
{
_onTransitionedEvent.Invoke(transition);
representation = EnterState(newRepresentation, transition, args);
_onTransitionCompletedEvent.Invoke(transition);
}
State = representation.UnderlyingState;
}
/// <summary>
/// This method handles the execution of a trigger handler. It finds a
/// handle, then updates the current state information.
/// </summary>
/// <param name="trigger"></param>
/// <param name="args"></param>
void InternalFireOne(TTrigger trigger, params object[] args)
{
// If this is a trigger with parameters, we must validate the parameter(s)
if (_triggerConfiguration.TryGetValue(trigger, out TriggerWithParameters configuration))
{
configuration.ValidateParameters(args);
}
var source = State;
var representativeState = GetRepresentation(source);
// Try to find a trigger handler, either in the current state or a super state.
if (!representativeState.TryFindHandler(trigger, args, out TriggerBehaviourResult result))
{
_unhandledTriggerAction.Execute(representativeState.UnderlyingState, trigger, result?.UnmetGuardConditions);
return;
}
// Handle special case, re-entry in superstate
if (result.Handler is ReentryTriggerBehaviour handler)
{
// Handle transition, and set new state
var transition = new Transition(source, handler.Destination, trigger);
transition = representativeState.Exit(transition);
State = transition.Destination;
var newRepresentation = GetRepresentation(transition.Destination);
// Then Exit the final superstate
transition = new Transition(handler.Destination, handler.Destination, trigger);
newRepresentation.Exit(transition);
_onTransitionedEvent.Invoke(new Transition(source, handler.Destination, trigger));
newRepresentation.Enter(transition, args);
}
// Check if it is an internal transition, or a transition from one state to another.
else if (result.Handler.ResultsInTransitionFrom(source, args, out TState destination))
{
// Handle transition, and set new state
var transition = new Transition(source, destination, trigger);
transition = representativeState.Exit(transition);
State = transition.Destination;
var newRepresentation = GetRepresentation(transition.Destination);
_onTransitionedEvent.Invoke(new Transition(source, destination, trigger));
newRepresentation.Enter(transition, args);
}
else
{
// Internal transitions does not update the current state, but must execute the associated action.
var transition = new Transition(source, destination, trigger);
CurrentRepresentation.InternalAction(transition, args);
}
}
void InternalFireOne(TTrigger trigger, params object[] args)
{
if (_triggerConfiguration.TryGetValue(trigger, out TriggerWithParameters configuration))
{
configuration.ValidateParameters(args);
}
var source = State;
var representativeState = GetRepresentation(source);
if (!representativeState.TryFindHandler(trigger, out TriggerBehaviourResult result))
{
_unhandledTriggerAction.Execute(representativeState.UnderlyingState, trigger, result?.UnmetGuardConditions);
return;
}
if (result.Handler.ResultsInTransitionFrom(source, args, out TState destination))
{
var transition = new Transition(source, destination, trigger);
representativeState.Exit(transition);
State = transition.Destination;
var newRepresentation = GetRepresentation(transition.Destination);
_onTransitionedEvent.Invoke(transition);
newRepresentation.Enter(transition, args);
}
else
{
var transition = new Transition(source, destination, trigger);
CurrentRepresentation.InternalAction(transition, args);
}
}
private void HandleReentryTrigger(object[] args, StateRepresentation representativeState, Transition transition)
{
transition = representativeState.Exit(transition);
State = transition.Destination;
var newRepresentation = GetRepresentation(transition.Destination);
if (!transition.Source.Equals(transition.Destination))
{
// Then Exit the final superstate
transition = new Transition(transition.Destination, transition.Destination, transition.Trigger);
newRepresentation.Exit(transition);
}
_onTransitionedEvent.Invoke(transition);
newRepresentation.Enter(transition, args);
}
/// <summary>
/// This method handles the execution of a trigger handler. It finds a
/// handle, then updates the current state information.
/// </summary>
/// <param name="trigger"></param>
/// <param name="args"></param>
void InternalFireOne(TTrigger trigger, params object[] args)
{
// If this is a trigger with parameters, we must validate the parameter(s)
if (_triggerConfiguration.TryGetValue(trigger, out TriggerWithParameters configuration))
{
configuration.ValidateParameters(args);
}
var source = State;
var representativeState = GetRepresentation(source);
// Try to find a trigger handler, either in the current state or a super state.
if (!representativeState.TryFindHandler(trigger, args, out TriggerBehaviourResult result))
{
_unhandledTriggerAction.Execute(representativeState.UnderlyingState, trigger, result?.UnmetGuardConditions);
return;
}
// Check if this trigger should be ignored
if (result.Handler is IgnoredTriggerBehaviour)
{
return;
}
// Handle special case, re-entry in superstate
if (result.Handler is ReentryTriggerBehaviour handler)
{
// Handle transition, and set new state
var transition = new Transition(source, handler.Destination, trigger);
transition = representativeState.Exit(transition);
State = transition.Destination;
var newRepresentation = GetRepresentation(transition.Destination);
if (!source.Equals(transition.Destination))
{
// Then Exit the final superstate
transition = new Transition(handler.Destination, handler.Destination, trigger);
newRepresentation.Exit(transition);
}
_onTransitionedEvent.Invoke(new Transition(source, handler.Destination, trigger));
newRepresentation.Enter(transition, args);
}
// Check if it is an internal transition, or a transition from one state to another.
else if (result.Handler.ResultsInTransitionFrom(source, args, out TState destination))
{
// Handle transition, and set new state
var transition = new Transition(source, destination, trigger);
transition = representativeState.Exit(transition);
State = transition.Destination;
var newRepresentation = GetRepresentation(transition.Destination);
// Check if there is an intital transition configured
if (newRepresentation.HasInitialTransition)
{
// Verify that the target state is a substate
if (!newRepresentation.GetSubstates().Any(s => s.UnderlyingState.Equals(newRepresentation.InitialTransitionTarget)))
{
throw new InvalidOperationException($"The target ({newRepresentation.InitialTransitionTarget}) for the initial transition is not a substate.");
}
// Check if state has substate(s), and if an initial transition(s) has been set up.
while (newRepresentation.GetSubstates().Any() && newRepresentation.HasInitialTransition)
{
var initialTransition = new Transition(source, newRepresentation.InitialTransitionTarget, trigger);
newRepresentation = GetRepresentation(newRepresentation.InitialTransitionTarget);
newRepresentation.Enter(initialTransition, args);
State = newRepresentation.UnderlyingState;
}
//Alert all listeners of state transition
_onTransitionedEvent.Invoke(new Transition(source, destination, trigger));
}
else
{
//Alert all listeners of state transition
_onTransitionedEvent.Invoke(new Transition(source, destination, trigger));
newRepresentation.Enter(transition, args);
}
}
else
{
// Internal transitions does not update the current state, but must execute the associated action.
var transition = new Transition(source, destination, trigger);
CurrentRepresentation.InternalAction(transition, args);
}
}
protected void NotifyOfTransition(T context, StateTransitionResult <TState, TTrigger> transitionResult)
{
OnTransitionedEvent?.Invoke(context, transitionResult);
}