public override void OnPush()
{
try
{
this._current = this.Grab(this._stage._in);
if (this._current is IMultipleValues <T> mv)
{
this._currentEnumerator = mv.Values.GetEnumerator();
this.MoveCurrentEnumerator();
}
this.PushPull();
}
catch (Exception ex)
{
var directive = this._decider(ex);
switch (directive)
{
case Directive.Stop:
this.FailStage(ex);
break;
case Directive.Resume:
if (!this.HasBeenPulled(this._stage._in))
{
this.Pull(this._stage._in);
}
break;
case Directive.Restart:
this.RestartState();
if (!this.HasBeenPulled(this._stage._in))
{
this.Pull(this._stage._in);
}
break;
default:
throw new ArgumentOutOfRangeException();
}
}
}
private void RestartState()
{
this._current = null;
this._currentEnumerator = null;
}