4 * This file is part of the Symfony package.
6 * (c) Fabien Potencier <fabien@symfony.com>
8 * For the full copyright and license information, please view the LICENSE
9 * file that was distributed with this source code.
12 namespace Symfony\Component\HttpKernel\Controller\ArgumentResolver;
14 use Symfony\Component\HttpFoundation\Request;
15 use Symfony\Component\HttpKernel\Controller\ArgumentValueResolverInterface;
16 use Symfony\Component\HttpKernel\ControllerMetadata\ArgumentMetadata;
19 * Yields the default value defined in the action signature when no value has been given.
21 * @author Iltar van der Berg <kjarli@gmail.com>
23 final class DefaultValueResolver implements ArgumentValueResolverInterface
28 public function supports(Request $request, ArgumentMetadata $argument)
30 return $argument->hasDefaultValue() || (null !== $argument->getType() && $argument->isNullable() && !$argument->isVariadic());
36 public function resolve(Request $request, ArgumentMetadata $argument)
38 yield $argument->hasDefaultValue() ? $argument->getDefaultValue() : null;