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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\PropertyAccess\PropertyAccess;
use Symfony\Component\PropertyAccess\PropertyAccessorInterface;
use Symfony\Component\PropertyAccess\PropertyPath;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
use Symfony\Component\Validator\Context\ExecutionContextInterface;
use Symfony\Component\Validator\Exception\RuntimeException;
use Symfony\Component\Validator\Exception\UnexpectedTypeException;
/**
* @author Fabien Potencier <fabien@symfony.com>
* @author Bernhard Schussek <bschussek@symfony.com>
*/
class ExpressionValidator extends ConstraintValidator
{
private $propertyAccessor;
private $expressionLanguage;
public function __construct(PropertyAccessorInterface $propertyAccessor = null, ExpressionLanguage $expressionLanguage = null)
{
$this->propertyAccessor = $propertyAccessor;
$this->expressionLanguage = $expressionLanguage;
}
/**
* {@inheritdoc}
*/
public function validate($value, Constraint $constraint)
{
if (!$constraint instanceof Expression) {
throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Expression');
}
$variables = array();
// Symfony 2.5+
if ($this->context instanceof ExecutionContextInterface) {
$variables['value'] = $value;
$variables['this'] = $this->context->getObject();
} elseif (null === $this->context->getPropertyName()) {
$variables['value'] = $value;
$variables['this'] = $value;
} else {
$root = $this->context->getRoot();
$variables['value'] = $value;
if (\is_object($root)) {
// Extract the object that the property belongs to from the object
// graph
$path = new PropertyPath($this->context->getPropertyPath());
$parentPath = $path->getParent();
$variables['this'] = $parentPath ? $this->getPropertyAccessor()->getValue($root, $parentPath) : $root;
} else {
$variables['this'] = null;
}
}
if (!$this->getExpressionLanguage()->evaluate($constraint->expression, $variables)) {
if ($this->context instanceof ExecutionContextInterface) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value, self::OBJECT_TO_STRING))
->setCode(Expression::EXPRESSION_FAILED_ERROR)
->addViolation();
} else {
$this->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value, self::OBJECT_TO_STRING))
->setCode(Expression::EXPRESSION_FAILED_ERROR)
->addViolation();
}
}
}
private function getExpressionLanguage()
{
if (null === $this->expressionLanguage) {
if (!class_exists('Symfony\Component\ExpressionLanguage\ExpressionLanguage')) {
throw new RuntimeException('Unable to use expressions as the Symfony ExpressionLanguage component is not installed.');
}
$this->expressionLanguage = new ExpressionLanguage();
}
return $this->expressionLanguage;
}
private function getPropertyAccessor()
{
if (null === $this->propertyAccessor) {
if (!class_exists('Symfony\Component\PropertyAccess\PropertyAccess')) {
throw new RuntimeException('Unable to use expressions as the Symfony PropertyAccess component is not installed.');
}
$this->propertyAccessor = PropertyAccess::createPropertyAccessor();
}
return $this->propertyAccessor;
}
}