integrate former Symfony Propel1 bridge

Form/DataTransformer/CollectionToArrayTransformer.php

@@ -0,0 +1,55 @@
+<?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 Propel\PropelBundle\Form\DataTransformer;
+
+use PropelObjectCollection;
+use Symfony\Component\Form\DataTransformerInterface;
+use Symfony\Component\Form\Exception\TransformationFailedException;
+
+/**
+ * CollectionToArrayTransformer class.
+ *
+ * @author William Durand <william.durand1@gmail.com>
+ * @author Pierre-Yves Lebecq <py.lebecq@gmail.com>
+ */
+class CollectionToArrayTransformer implements DataTransformerInterface
+{
+    public function transform($collection)
+    {
+        if (null === $collection) {
+            return array();
+        }
+
+        if (!$collection instanceof PropelObjectCollection) {
+            throw new TransformationFailedException('Expected a \PropelObjectCollection.');
+        }
+
+        return $collection->getData();
+    }
+
+    public function reverseTransform($array)
+    {
+        $collection = new PropelObjectCollection();
+
+        if ('' === $array || null === $array) {
+            return $collection;
+        }
+
+        if (!is_array($array)) {
+            throw new TransformationFailedException('Expected an array.');
+        }
+
+        $collection->setData($array);
+
+        return $collection;
+    }
+}