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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\Extension\Validator\Type;
use Symfony\Component\Form\Extension\Validator\Constraints\Form;
use Symfony\Component\Form\AbstractExtension;
use Symfony\Component\Validator\ValidatorInterface;
use Symfony\Component\Validator\Constraints\Valid;
* Extension supporting the Symfony2 Validator component in forms.
* @author Bernhard Schussek <>
class ValidatorExtension extends AbstractExtension
private $validator;
public function __construct(ValidatorInterface $validator)
$this->validator = $validator;
// 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 \Symfony\Component\Validator\Mapping\ClassMetadata $metadata */
$metadata = $this->validator->getMetadataFactory()->getClassMetadata('Symfony\Component\Form\Form');
$metadata->addConstraint(new Form());
$metadata->addPropertyConstraint('children', new Valid());
public function loadTypeGuesser()
return new ValidatorTypeGuesser($this->validator->getMetadataFactory());
protected function loadTypeExtensions()
return array(
new Type\FormTypeValidatorExtension($this->validator),
new Type\RepeatedTypeValidatorExtension(),
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