Moved cache drivers outside core to extensions (plugins)

plugins/cache-redis/Predis/Configuration/OptionInterface.php

@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of the Predis package.
+ *
+ * (c) Daniele Alessandri <suppakilla@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Predis\Configuration;
+
+/**
+ * Defines an handler used by Predis\Configuration\Options to filter, validate
+ * or return default values for a given option.
+ *
+ * @author Daniele Alessandri <suppakilla@gmail.com>
+ */
+interface OptionInterface
+{
+    /**
+     * Filters and validates the passed value.
+     *
+     * @param OptionsInterface $options Options container.
+     * @param mixed            $value   Input value.
+     *
+     * @return mixed
+     */
+    public function filter(OptionsInterface $options, $value);
+
+    /**
+     * Returns the default value for the option.
+     *
+     * @param OptionsInterface $options Options container.
+     *
+     * @return mixed
+     */
+    public function getDefault(OptionsInterface $options);
+}