Abstract parent class for common rest controller methods.

RestController.php

<?php
namespace Acme\DemoBundle\Controller;

use Symfony\Component\HttpFoundation\Response;
use FOS\RestBundle\Controller\FOSRestController;
use FOS\RestBundle\View\View;
use Doctrine\ORM\EntityRepository;

abstract class RestController extends FOSRestController
{

    /**
     * @var Response
     */
    protected $lastModifiedResponse;

    /**
     * @param \DateTime $lastModified
     * @return bool
     */
    public function isNotModified(\DateTime $lastModified)
    {
        $this->lastModifiedResponse = new Response();
        $this->lastModifiedResponse->setLastModified($lastModified);
        $this->lastModifiedResponse->setPublic();

        if ($this->lastModifiedResponse->isNotModified($this->getRequest())) {
            return true;
        }

        return false;
    }

    /**
     * @return Response
     */
    public function getLastModifiedResponse()
    {
        return $this->lastModifiedResponse;
    }
}