Strategy implementation

gistfile1.php

<?php
namespace Haushaltportal\Stdlib\Hydrator\Strategy;

use Zend\Stdlib\Hydrator\Strategy\StrategyInterface;

class ProduktbereichStrategy implements StrategyInterface
{
    /**
     * {@inheritDoc}
     */
    public function extract($value)
    {
        if (is_numeric($value) || $value === null) {
            return $value;
        }

        return $value->getId();
    }

    /**
     * {@inheritDoc}
     */
    public function hydrate($value)
    {
        return $value;
    }
}