--- /dev/null
+<?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\Util;
+
+/**
+ * Contains utility methods for dealing with property paths.
+ *
+ * For more extensive functionality, use Symfony's PropertyAccess component.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+class PropertyPath
+{
+ /**
+ * Appends a path to a given property path.
+ *
+ * If the base path is empty, the appended path will be returned unchanged.
+ * If the base path is not empty, and the appended path starts with a
+ * squared opening bracket ("["), the concatenation of the two paths is
+ * returned. Otherwise, the concatenation of the two paths is returned,
+ * separated by a dot (".").
+ *
+ * @param string $basePath The base path
+ * @param string $subPath The path to append
+ *
+ * @return string The concatenation of the two property paths
+ */
+ public static function append($basePath, $subPath)
+ {
+ if ('' !== (string) $subPath) {
+ if ('[' === $subPath[0]) {
+ return $basePath.$subPath;
+ }
+
+ return '' !== (string) $basePath ? $basePath.'.'.$subPath : $subPath;
+ }
+
+ return $basePath;
+ }
+
+ /**
+ * Not instantiable.
+ */
+ private function __construct()
+ {
+ }
+}