/**
* {@inheritdoc}
*
* @throws InvalidEventException
*
* @since Method available since Release 2.2.0
*/
public function addTransitionEvent(TransitionEventInterface $event)
{
if ($event->getEventId() != EventInterface::EVENT_START) {
throw new InvalidEventException(sprintf('The transition event for the state "%s" should be "%s", "%s" is specified.', $this->getStateId(), EventInterface::EVENT_START, $event->getEventId()));
}
parent::addTransitionEvent($event);
}
/**
* Evaluates the guard for the given event.
*
* @param EventInterface $event
*
* @return bool
*
* @since Method available since Release 2.0.0
*/
private function evaluateGuard(TransitionEventInterface $event)
{
if ($event->getGuard() === null) {
return true;
}
return call_user_func($event->getGuard(), $event, $this->getPayload(), $this);
}
