Chris@14: <?php
Chris@14: 
Chris@14: /*
Chris@14:  * This file is part of the Symfony package.
Chris@14:  *
Chris@14:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@14:  *
Chris@14:  * For the full copyright and license information, please view the LICENSE
Chris@14:  * file that was distributed with this source code.
Chris@14:  */
Chris@14: 
Chris@14: namespace Symfony\Component\Validator;
Chris@14: 
Chris@14: use Psr\Container\ContainerInterface;
Chris@14: use Symfony\Component\Validator\Exception\UnexpectedTypeException;
Chris@14: use Symfony\Component\Validator\Exception\ValidatorException;
Chris@14: 
Chris@14: /**
Chris@14:  * Uses a service container to create constraint validators.
Chris@14:  *
Chris@14:  * @author Kris Wallsmith <kris@symfony.com>
Chris@14:  */
Chris@14: class ContainerConstraintValidatorFactory implements ConstraintValidatorFactoryInterface
Chris@14: {
Chris@14:     private $container;
Chris@14:     private $validators;
Chris@14: 
Chris@14:     public function __construct(ContainerInterface $container)
Chris@14:     {
Chris@14:         $this->container = $container;
Chris@17:         $this->validators = [];
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * {@inheritdoc}
Chris@14:      *
Chris@14:      * @throws ValidatorException      When the validator class does not exist
Chris@14:      * @throws UnexpectedTypeException When the validator is not an instance of ConstraintValidatorInterface
Chris@14:      */
Chris@14:     public function getInstance(Constraint $constraint)
Chris@14:     {
Chris@14:         $name = $constraint->validatedBy();
Chris@14: 
Chris@14:         if (!isset($this->validators[$name])) {
Chris@14:             if ($this->container->has($name)) {
Chris@14:                 $this->validators[$name] = $this->container->get($name);
Chris@14:             } else {
Chris@14:                 if (!class_exists($name)) {
Chris@17:                     throw new ValidatorException(sprintf('Constraint validator "%s" does not exist or is not enabled. Check the "validatedBy" method in your constraint class "%s".', $name, \get_class($constraint)));
Chris@14:                 }
Chris@14: 
Chris@14:                 $this->validators[$name] = new $name();
Chris@14:             }
Chris@14:         }
Chris@14: 
Chris@14:         if (!$this->validators[$name] instanceof ConstraintValidatorInterface) {
Chris@14:             throw new UnexpectedTypeException($this->validators[$name], ConstraintValidatorInterface::class);
Chris@14:         }
Chris@14: 
Chris@14:         return $this->validators[$name];
Chris@14:     }
Chris@14: }