From b16d7117a3b3ab1307ecebd11b2c983b50c265d9 Mon Sep 17 00:00:00 2001
From: Zhang Chao <80152403@qq.com>
Date: Thu, 15 Feb 2024 23:20:53 +0800
Subject: [PATCH] Fix NPE for TestRandomChains.testRandomChainsWithLargeStrings
 (#13104)

---
 .../java/org/apache/lucene/analysis/shingle/ShingleFilter.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lucene/analysis/common/src/java/org/apache/lucene/analysis/shingle/ShingleFilter.java b/lucene/analysis/common/src/java/org/apache/lucene/analysis/shingle/ShingleFilter.java
index 1eb4357eef1..e9520815dad 100644
--- a/lucene/analysis/common/src/java/org/apache/lucene/analysis/shingle/ShingleFilter.java
+++ b/lucene/analysis/common/src/java/org/apache/lucene/analysis/shingle/ShingleFilter.java
@@ -19,6 +19,7 @@ package org.apache.lucene.analysis.shingle;
 import java.io.IOException;
 import java.util.Iterator;
 import java.util.LinkedList;
+import java.util.Objects;
 import org.apache.lucene.analysis.TokenFilter;
 import org.apache.lucene.analysis.TokenStream;
 import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
@@ -175,7 +176,7 @@ public final class ShingleFilter extends TokenFilter {
    * @param tokenType token tokenType
    */
   public void setTokenType(String tokenType) {
-    this.tokenType = tokenType;
+    this.tokenType = Objects.requireNonNull(tokenType, "tokenType");
   }
 
   /**