Merge pull request #35 from thomasblass/ObjectIdentifierTransformer

[Task] Add ObjectIdentifierTransformer

Author: skurfuerst

Classes/Flowpack/ElasticSearch/Indexer/Object/Transform/ObjectIdentifierTransformer.php

@@ -0,0 +1,49 @@
+<?php
+namespace Flowpack\ElasticSearch\Indexer\Object\Transform;
+
+/*                                                                        *
+ * This script belongs to the TYPO3 Flow package "Flowpack.ElasticSearch".*
+ *                                                                        *
+ * It is free software; you can redistribute it and/or modify it under    *
+ * the terms of the GNU Lesser General Public License, either version 3   *
+ *  of the License, or (at your option) any later version.                *
+ *                                                                        *
+ * The TYPO3 project - inspiring people to share!                         *
+ *                                                                        */
+
+use TYPO3\Flow\Annotations as Flow;
+use TYPO3\Flow\Persistence\PersistenceManagerInterface;
+
+/**
+ * @Flow\Scope("singleton")
+ */
+class ObjectIdentifierTransformer implements TransformerInterface {
+
+	/**
+	 * @Flow\Inject
+	 * @var PersistenceManagerInterface
+	 */
+	protected $persistenceManager;
+
+	/**
+	 * Returns the Elasticsearch type this transform() method returns
+	 *
+	 * @return string
+	 */
+	public function getTargetMappingType() {
+		return 'string';
+	}
+
+	/**
+	 * @param mixed $source
+	 * @param \Flowpack\ElasticSearch\Annotations\Transform $annotation
+	 * @return string
+	 */
+	public function transformByAnnotation($source, \Flowpack\ElasticSearch\Annotations\Transform $annotation) {
+        if($source != null) {
+    		return $this->persistenceManager->getIdentifierByObject($source);
+        }
+        return '';
+	}
+}
+