Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\Validator\Constraints;
Chris@0: 
Chris@0: use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
Chris@0: use Symfony\Component\Validator\Constraint;
Chris@0: use Symfony\Component\Validator\ConstraintValidator;
Chris@0: use Symfony\Component\Validator\Exception\RuntimeException;
Chris@0: use Symfony\Component\Validator\Exception\UnexpectedTypeException;
Chris@0: 
Chris@0: /**
Chris@0:  * @author Fabien Potencier <fabien@symfony.com>
Chris@0:  * @author Bernhard Schussek <bschussek@symfony.com>
Chris@0:  */
Chris@0: class ExpressionValidator extends ConstraintValidator
Chris@0: {
Chris@0:     private $expressionLanguage;
Chris@0: 
Chris@0:     public function __construct($propertyAccessor = null, ExpressionLanguage $expressionLanguage = null)
Chris@0:     {
Chris@0:         $this->expressionLanguage = $expressionLanguage;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function validate($value, Constraint $constraint)
Chris@0:     {
Chris@0:         if (!$constraint instanceof Expression) {
Chris@0:             throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Expression');
Chris@0:         }
Chris@0: 
Chris@17:         $variables = [];
Chris@0:         $variables['value'] = $value;
Chris@0:         $variables['this'] = $this->context->getObject();
Chris@0: 
Chris@0:         if (!$this->getExpressionLanguage()->evaluate($constraint->expression, $variables)) {
Chris@0:             $this->context->buildViolation($constraint->message)
Chris@14:                 ->setParameter('{{ value }}', $this->formatValue($value, self::OBJECT_TO_STRING))
Chris@0:                 ->setCode(Expression::EXPRESSION_FAILED_ERROR)
Chris@0:                 ->addViolation();
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     private function getExpressionLanguage()
Chris@0:     {
Chris@0:         if (null === $this->expressionLanguage) {
Chris@0:             if (!class_exists('Symfony\Component\ExpressionLanguage\ExpressionLanguage')) {
Chris@0:                 throw new RuntimeException('Unable to use expressions as the Symfony ExpressionLanguage component is not installed.');
Chris@0:             }
Chris@0:             $this->expressionLanguage = new ExpressionLanguage();
Chris@0:         }
Chris@0: 
Chris@0:         return $this->expressionLanguage;
Chris@0:     }
Chris@0: }