gistfile1.txt

/**
     * Get a user from the Security Context
     *
     * @return mixed
     *
     * @throws \LogicException If SecurityBundle is not available
     *
     * @see Symfony\Component\Security\Core\Authentication\Token\TokenInterface::getUser()
     */
    public function getUser()
    {
        if (!$this->container->has('security.context')) {
            throw new \LogicException('The SecurityBundle is not registered in your application.');
        }

        if (null === $token = $this->container->get('security.context')->getToken()) {
            return null;
        }

        if (!is_object($user = $token->getUser())) {
            return null;
        }

        return $user;
    }