Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\HttpKernel\Controller\ArgumentResolver;
Chris@0: 
Chris@0: use Symfony\Component\HttpFoundation\Request;
Chris@0: use Symfony\Component\HttpKernel\Controller\ArgumentValueResolverInterface;
Chris@0: use Symfony\Component\HttpKernel\ControllerMetadata\ArgumentMetadata;
Chris@0: 
Chris@0: /**
Chris@0:  * Yields the default value defined in the action signature when no value has been given.
Chris@0:  *
Chris@0:  * @author Iltar van der Berg <kjarli@gmail.com>
Chris@0:  */
Chris@0: final class DefaultValueResolver implements ArgumentValueResolverInterface
Chris@0: {
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function supports(Request $request, ArgumentMetadata $argument)
Chris@0:     {
Chris@0:         return $argument->hasDefaultValue() || (null !== $argument->getType() && $argument->isNullable() && !$argument->isVariadic());
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function resolve(Request $request, ArgumentMetadata $argument)
Chris@0:     {
Chris@0:         yield $argument->hasDefaultValue() ? $argument->getDefaultValue() : null;
Chris@0:     }
Chris@0: }