[TASK] transform fulltext scripting from mvel to groovy

Unfortunately you must now add the two lines
of Configuration which are mentioned in the README
to the elasticsearch.yaml
The default param of script.disable_dynamic is sandbox,
so the used class and methods in the script part 
must be whitelisted

Author: mgoldbeck

Classes/Flowpack/ElasticSearch/ContentRepositoryAdaptor/Indexer/NodeIndexer.php

@@ -193,7 +193,10 @@ public function indexNode(Node $node, $targetWorkspaceName = NULL) {
 						'params' => array(
 							'newData' => $documentData
 						),
-						'upsert' => $documentData
+						'upsert' => $documentData,
+						'lang' => 'groovy'
+
+
 					)
 				);
 			} else {
@@ -256,10 +259,15 @@ protected function updateFulltext(Node $node, array $fulltextIndexOfNode, $targe
 						ctx._source.__fulltextParts = new LinkedHashMap();
 					}
 					ctx._source.__fulltextParts[identifier] = fulltext;
-
 					ctx._source.__fulltext = new LinkedHashMap();
-					foreach (fulltextByNode : ctx._source.__fulltextParts.entrySet()) {
-						foreach (element : fulltextByNode.value.entrySet()) {
+
+					Iterator fulltextByNode = ctx._source.__fulltextParts.iterator();
+					for (fulltextByNode; fulltextByNode.hasNext();) {
+
+						Iterator elementIterator = fulltextByNode.next().iterator();
+						for (elementIterator; elementIterator.hasNext();) {
+
+							Map.Entry<String, String> element = elementIterator.next();
 							if (ctx._source.__fulltext.containsKey(element.key)) {
 								ctx._source.__fulltext[element.key] += " " + element.value;
 							} else {
@@ -277,7 +285,8 @@ protected function updateFulltext(Node $node, array $fulltextIndexOfNode, $targe
 					'__fulltextParts' => array(
 						$node->getIdentifier() => $fulltextIndexOfNode
 					)
-				)
+				),
+				'lang' => 'groovy'
 			)
 		);
 	}

README.md

@@ -30,6 +30,40 @@ Relevant Packages:
 
 The configuration from Version 1 to Version 2 has changed; here's what to change:
 
+**elasticsearch.yaml**
+
+Due to the fact that the default scripting language has changed from marvel to groovy since elasticsearch 1.3.0,
+there is a need, depending on your running installation of ElasticSearch, to add following lines of configuration to your
+ElasticSearch Configuration File `elasticsearch.yaml`.
+
+If you are using ElasticSearch version 1.2 you have also to install groovy as a plugin. To install the plugin just run
+the following command in the root folder of your elastic:
+
+```
+bin/plugin -install elasticsearch/elasticsearch-lang-groovy/2.2.0.
+```
+
+```
+script.disable_dynamic: false
+script.default_lang: groovy
+
+```
+
+For running with version > 1.3.x, what is recommended, it is sufficient to add following lines to your
+`elasticsearch.yaml`.
+
+
+```
+script.groovy.sandbox.class_whitelist: java.util.LinkedHashMap
+script.groovy.sandbox.receiver_whitelist:  java.util.Iterator, java.lang.Object, java.util.Map, java.util.Map$Entry
+```
+
+You can get further information about this topic here:
+
+http://www.elasticsearch.org/blog/elasticsearch-1-3-0-released/
+http://www.elasticsearch.org/blog/scripting-security/
+http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/modules-scripting.html
+
 **Settings.yaml**
 
 1. Change the base namespace for configuration from `Flowpack.ElasticSearch.ContentRepositoryAdaptor`