vendor/symfony/validator/Mapping/Factory/LazyLoadingMetadataFactory.php line 71
<?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\Factory;use Psr\Cache\CacheItemPoolInterface;use Symfony\Component\Validator\Exception\NoSuchMetadataException;use Symfony\Component\Validator\Mapping\ClassMetadata;use Symfony\Component\Validator\Mapping\Loader\LoaderInterface;use Symfony\Component\Validator\Mapping\MetadataInterface;/*** Creates new {@link ClassMetadataInterface} instances.** Whenever {@link getMetadataFor()} is called for the first time with a given* class name or object of that class, a new metadata instance is created and* returned. On subsequent requests for the same class, the same metadata* instance will be returned.** You can optionally pass a {@link LoaderInterface} instance to the constructor.* Whenever a new metadata instance is created, it is passed to the loader,* which can configure the metadata based on configuration loaded from the* filesystem or a database. If you want to use multiple loaders, wrap them in a* {@link LoaderChain}.** You can also optionally pass a {@link CacheInterface} instance to the* constructor. This cache will be used for persisting the generated metadata* between multiple PHP requests.** @author Bernhard Schussek <bschussek@gmail.com>*/class LazyLoadingMetadataFactory implements MetadataFactoryInterface{protected $loader;protected $cache;/*** The loaded metadata, indexed by class name.** @var ClassMetadata[]*/protected $loadedClasses = [];public function __construct(LoaderInterface $loader = null, CacheItemPoolInterface $cache = null){$this->loader = $loader;$this->cache = $cache;}/*** If the method was called with the same class name (or an object of that* class) before, the same metadata instance is returned.** If the factory was configured with a cache, this method will first look* for an existing metadata instance in the cache. If an existing instance* is found, it will be returned without further ado.** Otherwise, a new metadata instance is created. If the factory was* configured with a loader, the metadata is passed to the* {@link LoaderInterface::loadClassMetadata()} method for further* configuration. At last, the new object is returned.*/public function getMetadataFor(mixed $value): MetadataInterface{if (!\is_object($value) && !\is_string($value)) {throw new NoSuchMetadataException(sprintf('Cannot create metadata for non-objects. Got: "%s".', get_debug_type($value)));}$class = ltrim(\is_object($value) ? $value::class : $value, '\\');if (isset($this->loadedClasses[$class])) {return $this->loadedClasses[$class];}if (!class_exists($class) && !interface_exists($class, false)) {throw new NoSuchMetadataException(sprintf('The class or interface "%s" does not exist.', $class));}$cacheItem = $this->cache?->getItem($this->escapeClassName($class));if ($cacheItem?->isHit()) {$metadata = $cacheItem->get();// Include constraints from the parent class$this->mergeConstraints($metadata);return $this->loadedClasses[$class] = $metadata;}$metadata = new ClassMetadata($class);$this->loader?->loadClassMetadata($metadata);if (null !== $cacheItem) {$this->cache->save($cacheItem->set($metadata));}// Include constraints from the parent class$this->mergeConstraints($metadata);return $this->loadedClasses[$class] = $metadata;}private function mergeConstraints(ClassMetadata $metadata){if ($metadata->getReflectionClass()->isInterface()) {return;}// Include constraints from the parent classif ($parent = $metadata->getReflectionClass()->getParentClass()) {$metadata->mergeConstraints($this->getMetadataFor($parent->name));}// Include constraints from all directly implemented interfacesforeach ($metadata->getReflectionClass()->getInterfaces() as $interface) {if ('Symfony\Component\Validator\GroupSequenceProviderInterface' === $interface->name) {continue;}if ($parent && \in_array($interface->getName(), $parent->getInterfaceNames(), true)) {continue;}$metadata->mergeConstraints($this->getMetadataFor($interface->name));}}public function hasMetadataFor(mixed $value): bool{if (!\is_object($value) && !\is_string($value)) {return false;}$class = ltrim(\is_object($value) ? $value::class : $value, '\\');return class_exists($class) || interface_exists($class, false);}/*** Replaces backslashes by dots in a class name.*/private function escapeClassName(string $class): string{if (str_contains($class, '@')) {// anonymous class: replace all PSR6-reserved charactersreturn str_replace(["\0", '\\', '/', '@', ':', '{', '}', '(', ')'], '.', $class);}return str_replace('\\', '.', $class);}}