WorkflowBundle/Validator/EventFieldsValidator.php

<?php

namespace WorkflowBundle\Validator;

use Symfony\Component\Validator\Context\ExecutionContextInterface;
use WorkflowBundle\Utils\DoctrineEvents;
use WorkflowBundle\Utils\WorkFlowEvents;
use WorkflowBundle\Entity\Action;

class EventFieldsValidator
{

    /**
     * @param string $value
     * @param ExecutionContextInterface $context
     * @param array $payload
     */
    public static function validate($value, ExecutionContextInterface $context, $payload)
    {
        /* @var $entity Action */
        $entity = $context->getObject();
        $class = isset($payload['doctrine']) ? DoctrineEvents::class : WorkFlowEvents::class;
        if (!empty(array_intersect($entity->getEvent(), $class::getChoices())) && is_null($value)) {
            $context->buildViolation('error.event_field_required')
                    ->addViolation()
                    ;
        }
    }

}