/// <summary>
/// Configures the state transitions of the machine.
/// </summary>
/// <param name="state">State</param>
private void ConfigureStateTransitions(MachineState state)
{
this.GotoTransitions = state.GotoTransitions;
this.PushTransitions = state.PushTransitions;
this.ActionBindings = state.ActionBindings;
this.IgnoredEvents = state.IgnoredEvents;
this.DeferredEvents = state.DeferredEvents;
// If the state stack is non-empty, update the data structures
// with the following logic.
if (this.StateStack.Count > 0)
{
var lowerState = this.StateStack.Peek();
foreach (var e in lowerState.DeferredEvents)
{
if (!this.CanHandleEvent(e))
{
this.DeferredEvents.Add(e);
}
}
foreach (var e in lowerState.IgnoredEvents)
{
if (!this.CanHandleEvent(e))
{
this.IgnoredEvents.Add(e);
}
}
foreach (var action in lowerState.ActionBindings)
{
if (!this.CanHandleEvent(action.Key))
{
this.ActionBindings.Add(action.Key, action.Value);
}
}
}
}
/// <summary>
/// Initializes the state.
/// </summary>
/// <param name="machine">Machine</param>
internal void InitializeState(Machine machine)
{
this.Machine = machine;
this.GotoTransitions = new GotoStateTransitions();
this.PushTransitions = new PushStateTransitions();
this.ActionBindings = new ActionBindings();
this.IgnoredEvents = new HashSet <Type>();
this.DeferredEvents = new HashSet <Type>();
var entryAttribute = this.GetType().GetCustomAttribute(typeof(OnEntry), false) as OnEntry;
var exitAttribute = this.GetType().GetCustomAttribute(typeof(OnExit), false) as OnExit;
if (entryAttribute != null)
{
var method = this.Machine.GetType().GetMethod(entryAttribute.Action,
BindingFlags.NonPublic | BindingFlags.Instance);
var action = (Action)Delegate.CreateDelegate(typeof(Action), this.Machine, method);
this.EntryAction = action;
}
if (exitAttribute != null)
{
var method = this.Machine.GetType().GetMethod(exitAttribute.Action,
BindingFlags.NonPublic | BindingFlags.Instance);
var action = (Action)Delegate.CreateDelegate(typeof(Action), this.Machine, method);
this.ExitAction = action;
}
var gotoAttributes = this.GetType().GetCustomAttributes(typeof(OnEventGotoState), false)
as OnEventGotoState[];
var pushAttributes = this.GetType().GetCustomAttributes(typeof(OnEventPushState), false)
as OnEventPushState[];
var doAttributes = this.GetType().GetCustomAttributes(typeof(OnEventDoAction), false)
as OnEventDoAction[];
foreach (var attr in gotoAttributes)
{
if (attr.Action == null)
{
this.GotoTransitions.Add(attr.Event, attr.State);
}
else
{
var method = this.Machine.GetType().GetMethod(attr.Action,
BindingFlags.NonPublic | BindingFlags.Instance);
var action = (Action)Delegate.CreateDelegate(typeof(Action), this.Machine, method);
this.GotoTransitions.Add(attr.Event, attr.State, action);
}
}
foreach (var attr in pushAttributes)
{
this.PushTransitions.Add(attr.Event, attr.State);
}
foreach (var attr in doAttributes)
{
var method = this.Machine.GetType().GetMethod(attr.Action,
BindingFlags.NonPublic | BindingFlags.Instance);
var action = (Action)Delegate.CreateDelegate(typeof(Action), this.Machine, method);
this.ActionBindings.Add(attr.Event, action);
}
var ignoreEventsAttribute = this.GetType().GetCustomAttribute(typeof(IgnoreEvents), false) as IgnoreEvents;
var deferEventsAttribute = this.GetType().GetCustomAttribute(typeof(DeferEvents), false) as DeferEvents;
if (ignoreEventsAttribute != null)
{
this.IgnoredEvents.UnionWith(ignoreEventsAttribute.Events);
}
if (deferEventsAttribute != null)
{
this.DeferredEvents.UnionWith(deferEventsAttribute.Events);
}
}
