Custom doctrine hydrator

doctrine.yaml

doctrine:
    orm:
        entity_managers:
            default:
                hydrators:
                    some_hydrator: App\Doctrine\ORM\Hydration\SomeHydrator

SomeHydrator.php

<?php

namespace App\Doctrine\ORM\Hydration;

use App\Entity\User;
use Doctrine\ORM\Internal\Hydration\ObjectHydrator;

class SomeHydrator extends ObjectHydrator
{
    /**
     * @return array
     */
    protected function hydrateAllData()
    {
        $entries = parent::hydrateAllData();
        $result = [];

        foreach ($entries as $entry) {
            ...
            // Do soemthing here

            $result[] = ...
        }

        return $result;
    }
}