Added RelationListIteratorAdapter

src/contracts/Repository/Iterator/BatchIteratorAdapter/RelationListIteratorAdapter.php

@@ -0,0 +1,42 @@
+<?php
+
+/**
+ * @copyright Copyright (C) Ibexa AS. All rights reserved.
+ * @license For full copyright and license information view LICENSE file distributed with this source code.
+ */
+declare(strict_types=1);
+
+namespace Ibexa\Contracts\Core\Repository\Iterator\BatchIteratorAdapter;
+
+use Ibexa\Contracts\Core\Repository\ContentService;
+use Ibexa\Contracts\Core\Repository\Iterator\BatchIteratorAdapter;
+use Ibexa\Contracts\Core\Repository\Values\Content\RelationType;
+use Ibexa\Contracts\Core\Repository\Values\Content\VersionInfo;
+use Iterator;
+use IteratorIterator;
+
+final class RelationListIteratorAdapter implements BatchIteratorAdapter
+{
+    public function __construct(
+        readonly private ContentService $contentService,
+        readonly private VersionInfo $versionInfo,
+        readonly private ?RelationType $relationType = null,
+    ) {
+    }
+
+    public function fetch(int $offset, int $limit): Iterator
+    {
+        $iterator = $this->contentService->loadRelationList(
+            $this->versionInfo,
+            $offset,
+            $limit,
+            $this->relationType
+        )->getIterator();
+
+        if ($iterator instanceof Iterator) {
+            return $iterator;
+        }
+
+        return new IteratorIterator($iterator);
+    }
+}