[Summary view] [Print] [Text view]

   1  <?php
   2  
   3  /*
   4   * This file is part of the Symfony package.
   5   *
   6   * (c) Fabien Potencier <fabien@symfony.com>
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  namespace Symfony\Component\HttpKernel\Controller\ArgumentResolver;
  13  
  14  use Symfony\Component\HttpFoundation\Request;
  15  use Symfony\Component\HttpKernel\Controller\ArgumentValueResolverInterface;
  16  use Symfony\Component\HttpKernel\ControllerMetadata\ArgumentMetadata;
  17  
  18  /**
  19   * Yields the default value defined in the action signature when no value has been given.
  20   *
  21   * @author Iltar van der Berg <kjarli@gmail.com>
  22   */
  23  final class DefaultValueResolver implements ArgumentValueResolverInterface
  24  {
  25      /**
  26       * {@inheritdoc}
  27       */
  28      public function supports(Request $request, ArgumentMetadata $argument)
  29      {
  30          return $argument->hasDefaultValue() || (null !== $argument->getType() && $argument->isNullable() && !$argument->isVariadic());
  31      }
  32  
  33      /**
  34       * {@inheritdoc}
  35       */
  36      public function resolve(Request $request, ArgumentMetadata $argument)
  37      {
  38          yield $argument->hasDefaultValue() ? $argument->getDefaultValue() : null;
  39      }
  40  }