Seems not to be called

AgencyStrategy.php

<?php
namespace Admin\Hydrator;

use cwdCommon\Doctrine\EntityManagerAwareInterface;
use Zend\Stdlib\Hydrator\Strategy\DefaultStrategy;

class AgencyStrategy extends DefaultStrategy implements EntityManagerAwareInterface
{
    /**
     * @var \Doctrine\ORM\EntityManager
     */
    private $em;

    public function extract($value)
    {
        echo 'extract - i got called';
        $result = array();
        foreach ($value as $instance) {
            $result[] = $instance->getAgencyId();
        }
        return $result;
    }

    public function hydrate($value)
    {
        echo 'hydrate - i got called';
        $result = $value;
        if (is_array($value)) {
            $result = array();
            foreach ($value as $id) {
                $result[] = $this->findEntity($id);
            }
        }

        return $result;
    }

    private function findEntity($id)
    {
        return $this->getEntityManager()->find('Admin\Entity\Agency', $id);
    }

    public function getEntityManager()
    {
        return $this->em;
    }

    /* (non-PHPdoc)
     * @see \cwdCommon\Doctrine\EntityManagerAwareInterface::setEntityManager()
     */
     public function setEntityManager(\Doctrine\ORM\EntityManager $em) {
        $this->em = $em;
     }
}