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<?php
/**
* see that empty extrefs get rendered as type Empty, ie as null
*/
namespace Graviton\DocumentBundle\Serializer\Listener;
use Graviton\DocumentBundle\Document\ExtRefHoldingDocumentInterface;
use JMS\Serializer\EventDispatcher\PreSerializeEvent;
*
* @author List of contributors <https://github.com/libgraviton/graviton/graphs/contributors>
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
* @link http://swisscom.ch
class EmptyExtRefListener
{
* if is empty extref object, divert serializing to type Empty, which creates a null instead of empty object
* @param PreSerializeEvent $event event
* @return void
* @throws \Exception
public function onPreSerialize(PreSerializeEvent $event)
$object = $event->getObject();
if ($object instanceof ExtRefHoldingDocumentInterface && $object->isEmptyExtRefObject() === true) {
$event->setType('Empty', [$object]);
}
libgraviton /
graviton
