Don't use old Syntax for fetching field content from ES

oaipmh-core/src/main/java/info/textgrid/middleware/IdentifierListDelivererIDIOM.java

@@ -14,6 +14,8 @@ import org.elasticsearch.index.query.QueryBuilders;
 import org.elasticsearch.index.query.RangeQueryBuilder;
 import org.elasticsearch.search.SearchHit;
 import org.elasticsearch.search.builder.SearchSourceBuilder;
+import org.json.JSONObject;
+
 import info.textgrid.middleware.oaipmh.ListIdentifiersType;
 import info.textgrid.middleware.oaipmh.ResumptionTokenType;
 
@@ -97,7 +99,7 @@ public class IdentifierListDelivererIDIOM extends IdentifierListDelivererAbstrac
       searchRequest.source(searchSourceBuilder);
       searchRequest.scroll(TimeValue.timeValueHours(24L));
       scrollResp = OAI_ESClient.getEsClient().search(searchRequest, RequestOptions.DEFAULT);
-      //scrollResp = OAI_ESClient.getEsClient().prepareSearchScroll(resumptionToken)
+      //	scrollResp = OAI_ESClient.getEsClient().prepareSearchScroll(resumptionToken)
       // .setScroll(TimeValue.timeValueHours(24L)).execute().actionGet();
     }
 
@@ -112,8 +114,8 @@ public class IdentifierListDelivererIDIOM extends IdentifierListDelivererAbstrac
 
       for (SearchHit hit : scrollResp.getHits().getHits()) {
         i++;
-        String textgridURI =
-            hit.getFields().get("textgridUri").getValue().toString().replace(".0", "");
+        String textgridURI = OAIPMHUtilities.fieldLoader(new JSONObject(hit.getSourceAsMap()), "textgridUri").replace(".0","");
+            //hit.getFields().get("textgridUri").getValue().toString().replace(".0", "");
         RecordDelivererIDIOM idiomRecord = new RecordDelivererIDIOM(true, false);
         identifierList.getHeader()
             .add(idiomRecord.getRecordById(textgridURI).getRecord().getHeader());