From dd308cd87e5a9ccf6071ea340ad8dda5c34c768a Mon Sep 17 00:00:00 2001
From: Javen O'Neal <onealj@apache.org>
Date: Tue, 22 Mar 2016 07:04:51 +0000
Subject: [PATCH] return unmodifiable shared strings to guarentee parallel data
 structures stay in sync

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1736144 13f79535-47bb-0310-9956-ffa450edef68
---
 .../java/org/apache/poi/xssf/model/SharedStringsTable.java      | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ooxml/java/org/apache/poi/xssf/model/SharedStringsTable.java b/src/ooxml/java/org/apache/poi/xssf/model/SharedStringsTable.java
index c641a4f77..8ade04f8f 100644
--- a/src/ooxml/java/org/apache/poi/xssf/model/SharedStringsTable.java
+++ b/src/ooxml/java/org/apache/poi/xssf/model/SharedStringsTable.java
@@ -206,7 +206,7 @@ public class SharedStringsTable extends POIXMLDocumentPart {
      * @return array of CTRst beans
      */
     public List<CTRst> getItems() {
-        return strings;
+        return Collections.unmodifiableList(strings);
     }
 
     /**