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application/Espo/Core/FieldProcessing/SpecificFieldLoader.php

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+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\FieldProcessing;
+
+use Espo\Core\InjectableFactory;
+use Espo\ORM\Defs;
+use Espo\ORM\Entity;
+use RuntimeException;
+
+/**
+ * @since 9.1.0
+ * @internal Yet experimental.
+ */
+class SpecificFieldLoader
+{
+    public function __construct(
+        private Defs $defs,
+        private InjectableFactory $injectableFactory,
+    ) {}
+
+    public function process(Entity $entity, string $field): void
+    {
+        /** @var ?class-string<Loader<Entity>> $loaderClassName */
+        $loaderClassName = $this->defs
+            ->getEntity($entity->getEntityType())
+            ->tryGetField($field)
+            ?->getParam('loaderClassName');
+
+        if (!$loaderClassName) {
+            return;
+        }
+
+        $loader = $this->injectableFactory->create($loaderClassName);
+
+        if (!$loader instanceof Loader) {
+            throw new RuntimeException("Bad field loader.");
+        }
+
+        $loader->process($entity, Loader\Params::create());
+    }
+}