Refactor collection repositories: use one instance per databox

lib/Alchemy/Phrasea/Collection/Factory/ArrayCachedCollectionRepositoryFactory.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace Alchemy\Phrasea\Collection\Factory;
+
+use Alchemy\Phrasea\Collection\CollectionRepository;
+use Alchemy\Phrasea\Collection\CollectionRepositoryFactory;
+use Alchemy\Phrasea\Collection\Repository\ArrayCacheCollectionRepository;
+
+class ArrayCachedCollectionRepositoryFactory implements CollectionRepositoryFactory
+{
+    /**
+     * @var CollectionRepositoryFactory
+     */
+    private $collectionRepositoryFactory;
+
+    /**
+     * @param CollectionRepositoryFactory $collectionRepositoryFactory
+     */
+    public function __construct(CollectionRepositoryFactory $collectionRepositoryFactory)
+    {
+        $this->collectionRepositoryFactory = $collectionRepositoryFactory;
+    }
+
+    /**
+     * @param int $databoxId
+     * @return CollectionRepository
+     */
+    public function createRepositoryForDatabox($databoxId)
+    {
+        $repository = $this->collectionRepositoryFactory->createRepositoryForDatabox($databoxId);
+
+        return new ArrayCacheCollectionRepository($repository);
+    }
+}