--- /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\DependencyInjection;
+
+class Alias
+{
+ private $id;
+ private $public;
+
+ /**
+ * @param string $id Alias identifier
+ * @param bool $public If this alias is public
+ */
+ public function __construct($id, $public = true)
+ {
+ $this->id = strtolower($id);
+ $this->public = $public;
+ }
+
+ /**
+ * Checks if this DI Alias should be public or not.
+ *
+ * @return bool
+ */
+ public function isPublic()
+ {
+ return $this->public;
+ }
+
+ /**
+ * Sets if this Alias is public.
+ *
+ * @param bool $boolean If this Alias should be public
+ */
+ public function setPublic($boolean)
+ {
+ $this->public = (bool) $boolean;
+ }
+
+ /**
+ * Returns the Id of this alias.
+ *
+ * @return string The alias id
+ */
+ public function __toString()
+ {
+ return $this->id;
+ }
+}