From e10a8b11387b6cd98fab58614fbd1bc0496f27a1 Mon Sep 17 00:00:00 2001
From: Jan Schnasse <schnasse@gmx.de>
Date: Thu, 4 Jul 2019 09:22:42 +0200
Subject: [PATCH] add additional check, if identifier is not provided as an
 array

---
 app/helper/oai/WglMapper.java | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/app/helper/oai/WglMapper.java b/app/helper/oai/WglMapper.java
index a8b6d540..81ca8bf3 100644
--- a/app/helper/oai/WglMapper.java
+++ b/app/helper/oai/WglMapper.java
@@ -268,9 +268,13 @@ private List<String> getList(JsonNode n, String string) {
 	private String getString(JsonNode n, String string) {
 		StringBuffer result = new StringBuffer();
 		JsonNode a = n.at(string);
-		for (JsonNode item : a) {
-			String str = item.asText("no Value found");
-			result.append(str + " ,");
+		if (a.isArray()) {
+			for (JsonNode item : a) {
+				String str = item.asText("no Value found");
+				result.append(str + " ,");
+			}
+		} else {
+			result.append(a.asText());
 		}
 		if (result.length() == 0)
 			return null;