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vendor/symfony/validator/Constraints/ExpressionValidator.php

@@ -0,0 +1,65 @@
+<?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\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+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 $expressionLanguage;
+
+    public function __construct($propertyAccessor = null, ExpressionLanguage $expressionLanguage = null)
+    {
+        $this->expressionLanguage = $expressionLanguage;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function validate($value, Constraint $constraint)
+    {
+        if (!$constraint instanceof Expression) {
+            throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Expression');
+        }
+
+        $variables = array();
+        $variables['value'] = $value;
+        $variables['this'] = $this->context->getObject();
+
+        if (!$this->getExpressionLanguage()->evaluate($constraint->expression, $variables)) {
+            $this->context->buildViolation($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;
+    }
+}