From 90f228cabb62bbd49771cbf9358ffb2ae0bae740 Mon Sep 17 00:00:00 2001
From: Sayi <sayi@apache.org>
Date: Wed, 28 Apr 2021 09:26:16 +0000
Subject: [PATCH] Fix ArrayIndexOutOfBoundsException if XWPFRun does not set
 style

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1889259 13f79535-47bb-0310-9956-ffa450edef68
---
 .../java/org/apache/poi/xwpf/usermodel/XWPFRun.java   |  9 ++-------
 .../org/apache/poi/xwpf/usermodel/TestXWPFRun.java    | 11 +++++++++++
 2 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/poi-ooxml/src/main/java/org/apache/poi/xwpf/usermodel/XWPFRun.java b/poi-ooxml/src/main/java/org/apache/poi/xwpf/usermodel/XWPFRun.java
index c9176437a7..0a77b32d0f 100644
--- a/poi-ooxml/src/main/java/org/apache/poi/xwpf/usermodel/XWPFRun.java
+++ b/poi-ooxml/src/main/java/org/apache/poi/xwpf/usermodel/XWPFRun.java
@@ -1248,16 +1248,11 @@ public class XWPFRun implements ISDTContents, IRunElement, CharacterRun {
      */
     public String getStyle() {
         CTRPr pr = getCTR().getRPr();
-        if (pr == null) {
+        if (pr == null || pr.sizeOfRStyleArray() <= 0) {
             return "";
         }
-
         CTString style = pr.getRStyleArray(0);
-        if (style == null) {
-            return "";
-        }
-
-        return style.getVal();
+        return null == style ? "" : style.getVal();
     }
 
 
diff --git a/poi-ooxml/src/test/java/org/apache/poi/xwpf/usermodel/TestXWPFRun.java b/poi-ooxml/src/test/java/org/apache/poi/xwpf/usermodel/TestXWPFRun.java
index 1de994a804..856fcd9be3 100644
--- a/poi-ooxml/src/test/java/org/apache/poi/xwpf/usermodel/TestXWPFRun.java
+++ b/poi-ooxml/src/test/java/org/apache/poi/xwpf/usermodel/TestXWPFRun.java
@@ -788,6 +788,17 @@ class TestXWPFRun {
         document.close();
     }
 
+    @Test
+    void testGetEmptyStyle() throws IOException {
+        XWPFDocument document = new XWPFDocument();
+        final XWPFRun run = document.createParagraph().createRun();
+        assertEquals("", run.getStyle());
+
+        run.getCTR().addNewRPr();
+        assertEquals("", run.getStyle());
+        document.close();
+    }
+
     @Test
     void testGetDepthWidth() throws IOException, InvalidFormatException {
         try (XWPFDocument doc = XWPFTestDataSamples.openSampleDocument("TestDocument.docx")) {