private TransitionInfo TransitionTo(StateToken stateToken, object data)
{
if (stateToken == null)
{
throw new ArgumentNullException(nameof(stateToken));
}
StateBase state = states.FirstOrDefault(s => s.Token == stateToken);
if (state == null)
{
throw new UnknownStateException(CurrentStateToken, stateToken);
}
RaiseOnExitEvent(stateToken, data);
StateBase oldState = CurrentState;
CurrentState = state;
var stateEnterEventArgs = new StateEnterEventArgs(oldState?.Token, data);
isPerformActionLocked = true;
try
{
OnStateChanged(new StateChangedEventArgs(oldState, CurrentState));
CurrentState.OnEnter(stateEnterEventArgs);
}
finally
{
isPerformActionLocked = false;
}
return(stateEnterEventArgs.Redirect);
}
/// <summary>
/// Called when the state machine enters the current state.
/// </summary>
/// <param name="e">Custem event arguments.</param>
protected internal virtual void OnEnter(StateEnterEventArgs e)
{
Enter?.Invoke(this, e);
}