From 2ceb5f902074af2bb0e1bb637f964b81a8fe2eb1 Mon Sep 17 00:00:00 2001
From: PJ Fanning <fanningpj@apache.org>
Date: Mon, 16 Jun 2025 12:05:42 +0000
Subject: [PATCH] [bug-69714] refactor thread-local

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1926469 13f79535-47bb-0310-9956-ffa450edef68
---
 poi/src/main/java/org/apache/poi/util/TempFile.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/poi/src/main/java/org/apache/poi/util/TempFile.java b/poi/src/main/java/org/apache/poi/util/TempFile.java
index 0e655d43a9..e8417279b0 100644
--- a/poi/src/main/java/org/apache/poi/util/TempFile.java
+++ b/poi/src/main/java/org/apache/poi/util/TempFile.java
@@ -63,7 +63,11 @@ public final class TempFile {
      * @since POI 5.4.2
      */
     public static void setThreadLocalTempFileCreationStrategy(TempFileCreationStrategy strategy) {
-        threadLocalStrategy.set(strategy);
+        if (strategy == null) {
+            threadLocalStrategy.remove();
+        } else {
+            threadLocalStrategy.set(strategy);
+        }
     }
     
     /**