public final function delegate(Elevator $elevator, $signal)
{
if (is_null($this->nextProcessor)) {
throw new Exception("Unrecognized signal received: " . print_r($signal));
}
return $this->nextProcessor->handleSignal($elevator, $signal);
}
/** @return Elevator */
public function sendSignal($signal)
{
$this->process();
$state = $this->signalProcessor->handleSignal($this, $signal);
if (!is_null($state)) {
$this->state = $state;
$this->resetTimeStamp();
}
return $this;
}