Add MapperInterface with a doctrine implementation

Mapper/DoctrineMapper.php

@@ -0,0 +1,60 @@
+<?php
+
+namespace FOQ\ElasticaBundle\Mapper;
+
+use FOQ\ElasticaBundle\MapperInterface;
+use Doctrine\Common\Persistence\ObjectRepository;
+
+/**
+ * Maps Elastica documents with Doctrine objects
+ * This mapper assumes an exact match between
+ * elastica documents ids and doctrine object ids
+ */
+class DoctrineMapper implements MapperInterface
+{
+    /**
+     * Repository to fetch the objects from
+     *
+     * @var ObjectRepository
+     */
+    protected $objectRepository = null;
+
+    /**
+     * Doctrine identifier field
+     *
+     * @var string
+     */
+    protected $identifier = null;
+
+    /**
+     * Instanciates a new Mapper
+     *
+     * @param ObjectRepository objectRepository
+     * @param string $identifier
+     */
+    public function __construct(ObjectRepository $objectRepository, $identifier = 'id')
+    {
+        $this->objectRepository = $objectRepository;
+        $this->identifier       = $identifier;
+    }
+
+    /**
+     * Transforms an array of elastica objects into an array of
+     * model objects fetched from the doctrine repository
+     *
+     * @return array
+     **/
+    public function fromElasticaObjects(array $elasticaObjects)
+    {
+        $ids = array_map(function($elasticaObject) {
+            return $elasticaObject->getId();
+        }, $elasticaObjects);
+
+        return $this->objectRepository
+            ->createQueryBuilder()
+            ->field($this->identifier)->in($ids)
+            ->getQuery()
+            ->execute();
+    }
+
+}

MapperInterface.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace FOQ\ElasticaBundle;
+
+/**
+ * Maps Elastica documents with persisted objects
+ */
+interface MapperInterface
+{
+    /**
+     * Transforms an array of elastica objects into an array of
+     * model objects fetched from the doctrine repository
+     *
+     * @return array
+     **/
+    function fromElasticaObjects(array $elasticaObjects);
+}