Add ObjectToArrayTransformerInterface with an automatic implementation

Transformer/ObjectToArrayAutomaticTransformer.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace FOQ\ElasticaBundle\Transformer;
+
+/**
+ * AutomaticObjectToArrayTransformer
+ * Tries to convert objects by generating getters
+ * based on the required keys
+ */
+class ObjectToArrayAutomaticTransformer implements ObjectToArrayTransformerInterface
+{
+    /**
+     * Transforms an object into an array having the required keys
+     *
+     * @param object $object the object to convert
+     * @param array $requiredKeys the keys we want to have in the returned array
+     * @return array
+     **/
+    public function transform($object, array $requiredKeys)
+    {
+        $class = get_class($object);
+        $array = array();
+        foreach ($requiredKeys as $key) {
+            $getter = 'get'.ucfirst($key);
+            if (!method_exists($class, $getter)) {
+                throw new InvalidArgumentException(sprintf('The getter %s::%s does not exist', $this->objectClass, $getter));
+            }
+            $array[$key] = $object->$getter();
+        }
+
+        return $array;
+    }
+}