vendor/symfony/validator/Mapping/Loader/AbstractLoader.php line 73
<?php/** This file is part of the Symfony package.** (c) Fabien Potencier <fabien@symfony.com>** For the full copyright and license information, please view the LICENSE* file that was distributed with this source code.*/namespace Symfony\Component\Validator\Mapping\Loader;use Symfony\Component\Validator\Attribute\HasNamedArguments;use Symfony\Component\Validator\Constraint;use Symfony\Component\Validator\Exception\MappingException;/*** Base loader for validation metadata.** This loader supports the loading of constraints from Symfony's default* namespace (see {@link DEFAULT_NAMESPACE}) using the short class names of* those constraints. Constraints can also be loaded using their fully* qualified class names. At last, namespace aliases can be defined to load* constraints with the syntax "alias:ShortName".** @author Bernhard Schussek <bschussek@gmail.com>*/abstract class AbstractLoader implements LoaderInterface{/*** The namespace to load constraints from by default.*/public const DEFAULT_NAMESPACE = '\\Symfony\\Component\\Validator\\Constraints\\';protected $namespaces = [];/*** @var array<class-string, bool>*/private array $namedArgumentsCache = [];/*** Adds a namespace alias.** The namespace alias can be used to reference constraints from specific* namespaces in {@link newConstraint()}:** $this->addNamespaceAlias('mynamespace', '\\Acme\\Package\\Constraints\\');** $constraint = $this->newConstraint('mynamespace:NotNull');*/protected function addNamespaceAlias(string $alias, string $namespace){$this->namespaces[$alias] = $namespace;}/*** Creates a new constraint instance for the given constraint name.** @param string $name The constraint name. Either a constraint relative* to the default constraint namespace, or a fully* qualified class name. Alternatively, the constraint* may be preceded by a namespace alias and a colon.* The namespace alias must have been defined using* {@link addNamespaceAlias()}.* @param mixed $options The constraint options** @throws MappingException If the namespace prefix is undefined*/protected function newConstraint(string $name, mixed $options = null): Constraint{if (str_contains($name, '\\') && class_exists($name)) {$className = $name;} elseif (str_contains($name, ':')) {[$prefix, $className] = explode(':', $name, 2);if (!isset($this->namespaces[$prefix])) {throw new MappingException(sprintf('Undefined namespace prefix "%s".', $prefix));}$className = $this->namespaces[$prefix].$className;} else {$className = self::DEFAULT_NAMESPACE.$name;}if ($this->namedArgumentsCache[$className] ??= (bool) (new \ReflectionMethod($className, '__construct'))->getAttributes(HasNamedArguments::class)) {return new $className(...$options);}return new $className($options);}}