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