Moved cache drivers outside core to extensions (plugins)

plugins/cache-redis/Predis/Collection/Iterator/HashKey.php

@@ -0,0 +1,56 @@
+<?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\Collection\Iterator;
+
+use Predis\ClientInterface;
+
+/**
+ * Abstracts the iteration of fields and values of an hash by leveraging the
+ * HSCAN command (Redis >= 2.8) wrapped in a fully-rewindable PHP iterator.
+ *
+ * @author Daniele Alessandri <suppakilla@gmail.com>
+ *
+ * @link http://redis.io/commands/scan
+ */
+class HashKey extends CursorBasedIterator
+{
+    protected $key;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __construct(ClientInterface $client, $key, $match = null, $count = null)
+    {
+        $this->requiredCommand($client, 'HSCAN');
+
+        parent::__construct($client, $match, $count);
+
+        $this->key = $key;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function executeCommand()
+    {
+        return $this->client->hscan($this->key, $this->cursor, $this->getScanOptions());
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function extractNext()
+    {
+        $this->position = key($this->elements);
+        $this->current = array_shift($this->elements);
+    }
+}