www.aleph1.co.uk Git - yaffs-website/blob - vendor/symfony/validator/ContainerConstraintValidatorFactory.php

   1 <?php
   2
   3 /*
   4  * This file is part of the Symfony package.
   5  *
   6  * (c) Fabien Potencier <fabien@symfony.com>
   7  *
   8  * For the full copyright and license information, please view the LICENSE
   9  * file that was distributed with this source code.
  10  */
  11
  12 namespace Symfony\Component\Validator;
  13
  14 use Psr\Container\ContainerInterface;
  15 use Symfony\Component\Validator\Exception\UnexpectedTypeException;
  16 use Symfony\Component\Validator\Exception\ValidatorException;
  17
  18 /**
  19  * Uses a service container to create constraint validators.
  20  *
  21  * @author Kris Wallsmith <kris@symfony.com>
  22  */
  23 class ContainerConstraintValidatorFactory implements ConstraintValidatorFactoryInterface
  24 {
  25     private $container;
  26     private $validators;
  27
  28     public function __construct(ContainerInterface $container)
  29     {
  30         $this->container = $container;
  31         $this->validators = array();
  32     }
  33
  34     /**
  35      * {@inheritdoc}
  36      *
  37      * @throws ValidatorException      When the validator class does not exist
  38      * @throws UnexpectedTypeException When the validator is not an instance of ConstraintValidatorInterface
  39      */
  40     public function getInstance(Constraint $constraint)
  41     {
  42         $name = $constraint->validatedBy();
  43
  44         if (!isset($this->validators[$name])) {
  45             if ($this->container->has($name)) {
  46                 $this->validators[$name] = $this->container->get($name);
  47             } else {
  48                 if (!class_exists($name)) {
  49                     throw new ValidatorException(sprintf('Constraint validator "%s" does not exist or it is not enabled. Check the "validatedBy" method in your constraint class "%s".', $name, \get_class($constraint)));
  50                 }
  51
  52                 $this->validators[$name] = new $name();
  53             }
  54         }
  55
  56         if (!$this->validators[$name] instanceof ConstraintValidatorInterface) {
  57             throw new UnexpectedTypeException($this->validators[$name], ConstraintValidatorInterface::class);
  58         }
  59
  60         return $this->validators[$name];
  61     }
  62 }