DateTime converter

DateTimeConverter.php

<?php

use Sensio\Bundle\FrameworkExtraBundle\Request\ParamConverter\ParamConverterInterface;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\ConfigurationInterface;
use Symfony\Component\HttpFoundation\Request;

/**
 * Convert a date from the request to a DateTime instance.
 *
 * The semantics are controller semantics $varDate matches to a route parameter {var}
 */
class DateTimeConverter implements ParamConverterInterface
{
    /**
     * @param Request $request
     * @param ConfigurationInterface $configuration
     */
    public function apply(Request $request, ConfigurationInterface $configuration)
    {
        $varName = $configuration->getName();
        if ($request->attributes->has($varName) && !($value = $request->attributes->get($varName)) instanceof \DateTime) {
            try {
                $options = $configuration->getOptions();
                if (isset($options['format'])) {
                    $date = \DateTime::createFromFormat($options['format'], $value);
                } else {
                    $date = new \DateTime($value);
                }
            } catch(\Exception $e) {
                if (!$configuration->isOptional()) {
                    throw new \InvalidArgumentException("Invalid date given.");
                }
                $date = null;
            }
            $request->attributes->set($varName, $date);
        }
    }

    /**
     * @param ConfigurationInterface $configuration
     * @return bool
     */
    public function supports(ConfigurationInterface $configuration)
    {
        return $configuration->getClass() == 'DateTime';
    }
}