[Validator] added a Metadata factory that can be used with ValidatorInterface::validateValue()

src/Symfony/Component/Validator/Mapping/BlackholeMetadataFactory.php

@@ -0,0 +1,25 @@
+<?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\Mapping;
+
+/**
+ * Simple implementation of ClassMetadataFactoryInterface that can be used when using ValidatorInterface::validateValue().
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class BlackholeMetadataFactory implements ClassMetadataFactoryInterface
+{
+    public function getClassMetadata($class)
+    {
+        throw new \LogicException('BlackholeClassMetadataFactory only works with ValidatorInterface::validateValue().');
+    }
+}