ExpressionValidator.php
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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\LogicException;
use Symfony\Component\Validator\Exception\UnexpectedTypeException;
/**
* @author Fabien Potencier <fabien@symfony.com>
* @author Bernhard Schussek <bschussek@symfony.com>
*/
class ExpressionValidator extends ConstraintValidator
{
private $expressionLanguage;
/**
* @param ExpressionLanguage|null $expressionLanguage
*/
public function __construct($expressionLanguage = null)
{
if (\func_num_args() > 1) {
@trigger_error(sprintf('The "%s" instance should be passed as "%s" first argument instead of second argument since 4.4.', ExpressionLanguage::class, __METHOD__), \E_USER_DEPRECATED);
$expressionLanguage = func_get_arg(1);
if (null !== $expressionLanguage && !$expressionLanguage instanceof ExpressionLanguage) {
throw new \TypeError(sprintf('Argument 2 passed to "%s()" must be an instance of "%s" or null, "%s" given. Since 4.4, passing it as the second argument is deprecated and will trigger a deprecation. Pass it as the first argument instead.', __METHOD__, ExpressionLanguage::class, \is_object($expressionLanguage) ? \get_class($expressionLanguage) : \gettype($expressionLanguage)));
}
} elseif (null !== $expressionLanguage && !$expressionLanguage instanceof ExpressionLanguage) {
@trigger_error(sprintf('The "%s" first argument must be an instance of "%s" or null since 4.4. "%s" given', __METHOD__, ExpressionLanguage::class, \is_object($expressionLanguage) ? \get_class($expressionLanguage) : \gettype($expressionLanguage)), \E_USER_DEPRECATED);
$expressionLanguage = null;
}
$this->expressionLanguage = $expressionLanguage;
}
/**
* {@inheritdoc}
*/
public function validate($value, Constraint $constraint)
{
if (!$constraint instanceof Expression) {
throw new UnexpectedTypeException($constraint, Expression::class);
}
$variables = $constraint->values;
$variables['value'] = $value;
$variables['this'] = $this->context->getObject();
if (!$this->getExpressionLanguage()->evaluate($constraint->expression, $variables)) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value, self::OBJECT_TO_STRING))
->setCode(Expression::EXPRESSION_FAILED_ERROR)
->addViolation();
}
}
private function getExpressionLanguage(): ExpressionLanguage
{
if (null === $this->expressionLanguage) {
if (!class_exists(ExpressionLanguage::class)) {
throw new LogicException('Unable to use expressions as the Symfony ExpressionLanguage component is not installed.');
}
$this->expressionLanguage = new ExpressionLanguage();
}
return $this->expressionLanguage;
}
}