yaffs.net Git - yaffs-website/blob - vendor/symfony/validator/Constraints/ExpressionValidator.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\Constraints;
  13
  14 use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
  15 use Symfony\Component\Validator\Constraint;
  16 use Symfony\Component\Validator\ConstraintValidator;
  17 use Symfony\Component\Validator\Exception\RuntimeException;
  18 use Symfony\Component\Validator\Exception\UnexpectedTypeException;
  19
  20 /**
  21  * @author Fabien Potencier <fabien@symfony.com>
  22  * @author Bernhard Schussek <bschussek@symfony.com>
  23  */
  24 class ExpressionValidator extends ConstraintValidator
  25 {
  26     private $expressionLanguage;
  27
  28     public function __construct($propertyAccessor = null, ExpressionLanguage $expressionLanguage = null)
  29     {
  30         $this->expressionLanguage = $expressionLanguage;
  31     }
  32
  33     /**
  34      * {@inheritdoc}
  35      */
  36     public function validate($value, Constraint $constraint)
  37     {
  38         if (!$constraint instanceof Expression) {
  39             throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Expression');
  40         }
  41
  42         $variables = array();
  43         $variables['value'] = $value;
  44         $variables['this'] = $this->context->getObject();
  45
  46         if (!$this->getExpressionLanguage()->evaluate($constraint->expression, $variables)) {
  47             $this->context->buildViolation($constraint->message)
  48                 ->setParameter('{{ value }}', $this->formatValue($value, self::OBJECT_TO_STRING))
  49                 ->setCode(Expression::EXPRESSION_FAILED_ERROR)
  50                 ->addViolation();
  51         }
  52     }
  53
  54     private function getExpressionLanguage()
  55     {
  56         if (null === $this->expressionLanguage) {
  57             if (!class_exists('Symfony\Component\ExpressionLanguage\ExpressionLanguage')) {
  58                 throw new RuntimeException('Unable to use expressions as the Symfony ExpressionLanguage component is not installed.');
  59             }
  60             $this->expressionLanguage = new ExpressionLanguage();
  61         }
  62
  63         return $this->expressionLanguage;
  64     }
  65 }