Classes List

Symfony\Component\Validator\Constraints\ExpressionValidator

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<?php

/* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */


namespace Symfony\Component\Validator\Constraints;

use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
use Symfony\Component\Validator\Exception\RuntimeException;
use Symfony\Component\Validator\Exception\UnexpectedTypeException;

/** * @author Fabien Potencier <fabien@symfony.com> * @author Bernhard Schussek <bschussek@symfony.com> */
class ExpressionValidator extends ConstraintValidator
{
    private $expressionLanguage;

    public function __construct($propertyAccessor = nullExpressionLanguage $expressionLanguage = null)
    {
        $this->expressionLanguage = $expressionLanguage;
    }

    /** * {@inheritdoc} */
    public function validate($valueConstraint $constraint)
    {
        if (!$constraint instanceof Expression) {
            throw new UnexpectedTypeException($constraint__NAMESPACE__.'\Expression');
        }

        $variables = array();
        $variables['value'] = $value;
        $variables['this'] = $this->context->getObject();

        if (!$this->getExpressionLanguage()->evaluate($constraint->expression$variables)) {
            $this->context->buildViolation($constraint->message)
                ->setParameter('{{ value }}'$this->formatValue($valueself::OBJECT_TO_STRING))
                ->setCode(Expression::EXPRESSION_FAILED_ERROR)
                ->addViolation();
        }
    }

    private function getExpressionLanguage()
    {
        if (null === $this->expressionLanguage) {
            if (!class_exists('Symfony\Component\ExpressionLanguage\ExpressionLanguage')) {
                throw new RuntimeException('Unable to use expressions as the Symfony ExpressionLanguage component is not installed.');
            }
            $this->expressionLanguage = new ExpressionLanguage();
        }

        return $this->expressionLanguage;
    }
}