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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\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
use Symfony\Component\Validator\Exception\UnexpectedTypeException;
/**
* Validates whether a value is a valid language code
*
* @author Bernhard Schussek <bernhard.schussek@symfony.com>
*
* @api
*/
class LanguageValidator extends ConstraintValidator
{
/**
* Checks if the passed value is valid.
*
* @param mixed $value The value that should be validated
* @param Constraint $constraint The constraint for the validation
*
* @return Boolean Whether or not the value is valid
*
* @api
*/
public function isValid($value, Constraint $constraint)
{
if (null === $value || '' === $value) {
return true;
}
if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
throw new UnexpectedTypeException($value, 'string');
}
$value = (string) $value;
if (!in_array($value, \Symfony\Component\Locale\Locale::getLanguages())) {
$this->setMessage($constraint->message, array('{{ value }}' => $value));
return false;
}
return true;
}
}
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