Move Indexable callback calculations to a new service

Provider/IndexableInterface.php

@@ -0,0 +1,25 @@
+<?php
+
+/**
+ * This file is part of the FOSElasticaBundle project.
+ *
+ * (c) Infinite Networks Pty Ltd <http://www.infinite.net.au>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace FOS\ElasticaBundle\Provider;
+
+interface IndexableInterface
+{
+    /**
+     * Checks if an object passed should be indexable or not.
+     *
+     * @param string $indexName
+     * @param string $typeName
+     * @param mixed $object
+     * @return bool
+     */
+    public function isObjectIndexable($indexName, $typeName, $object);
+}