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* This file is part of the Symfony package.
* (c) Fabien Potencier <>
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
namespace Symfony\Component\Form\Extension\Validator;
use Symfony\Component\Form\AbstractExtension;
use Symfony\Component\Form\Extension\Validator\Constraints\Form;
use Symfony\Component\Validator\Constraints\Traverse;
use Symfony\Component\Validator\Mapping\ClassMetadata;
use Symfony\Component\Validator\Validator\ValidatorInterface;
* Extension supporting the Symfony Validator component in forms.
* @author Bernhard Schussek <>
class ValidatorExtension extends AbstractExtension
private $validator;
public function __construct(ValidatorInterface $validator)
$metadata = $validator->getMetadataFor('Symfony\Component\Form\Form');
// Register the form constraints in the validator programmatically.
// This functionality is required when using the Form component without
// the DIC, where the XML file is loaded automatically. Thus the following
// code must be kept synchronized with validation.xml
/* @var $metadata ClassMetadata */
$metadata->addConstraint(new Form());
$metadata->addConstraint(new Traverse(false));
$this->validator = $validator;
public function loadTypeGuesser()
return new ValidatorTypeGuesser($this->validator);
protected function loadTypeExtensions()
return [
new Type\FormTypeValidatorExtension($this->validator),
new Type\RepeatedTypeValidatorExtension(),
new Type\SubmitTypeValidatorExtension(),