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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;
use Symfony\Component\PropertyAccess\PropertyAccess;
use Symfony\Component\PropertyAccess\PropertyAccessorInterface;
use Symfony\Component\Validator\Constraints\ExpressionValidator;
/**
* Default implementation of the ConstraintValidatorFactoryInterface.
*
* This enforces the convention that the validatedBy() method on any
* Constraint will return the class name of the ConstraintValidator that
* should validate the Constraint.
*
* @author Bernhard Schussek <bschussek@gmail.com>
*/
class ConstraintValidatorFactory implements ConstraintValidatorFactoryInterface
{
protected $validators = array();
/**
* @var PropertyAccessorInterface
*/
private $propertyAccessor;
public function __construct(PropertyAccessorInterface $propertyAccessor = null)
{
$this->propertyAccessor = $propertyAccessor ?: PropertyAccess::createPropertyAccessor();
}
/**
* {@inheritDoc}
*/
public function getInstance(Constraint $constraint)
{
$className = $constraint->validatedBy();
// The second condition is a hack that is needed when CollectionValidator
// calls itself recursively (Collection constraints can be nested).
// Since the context of the validator is overwritten when initialize()
// is called for the nested constraint, the outer validator is
// acting on the wrong context when the nested validation terminates.
//
// A better solution - which should be approached in Symfony 3.0 - is to
// remove the initialize() method and pass the context as last argument
// to validate() instead.
if (!isset($this->validators[$className]) || 'Symfony\Component\Validator\Constraints\CollectionValidator' === $className) {
$this->validators[$className] = 'validator.expression' === $className
? new ExpressionValidator($this->propertyAccessor)
: new $className();
}
return $this->validators[$className];
}
}