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ContainerConstraintValidatorFactory.php
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<?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; use Psr\Container\ContainerInterface; use Symfony\Component\Validator\Exception\UnexpectedTypeException; use Symfony\Component\Validator\Exception\ValidatorException; /** * Uses a service container to create constraint validators. * * @author Kris Wallsmith <kris@symfony.com> */ class ContainerConstraintValidatorFactory implements ConstraintValidatorFactoryInterface { private $container; private $validators; public function __construct(ContainerInterface $container) { $this->container = $container; $this->validators = []; } /** * {@inheritdoc} * * @throws ValidatorException When the validator class does not exist * @throws UnexpectedTypeException When the validator is not an instance of ConstraintValidatorInterface */ public function getInstance(Constraint $constraint) { $name = $constraint->validatedBy(); if (!isset($this->validators[$name])) { if ($this->container->has($name)) { $this->validators[$name] = $this->container->get($name); } else { if (!class_exists($name)) { throw new ValidatorException(sprintf('Constraint validator "%s" does not exist or is not enabled. Check the "validatedBy" method in your constraint class "%s".', $name, get_debug_type($constraint))); } $this->validators[$name] = new $name(); } } if (!$this->validators[$name] instanceof ConstraintValidatorInterface) { throw new UnexpectedTypeException($this->validators[$name], ConstraintValidatorInterface::class); } return $this->validators[$name]; } }