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