From b4cb1f3d56956e59cb34da25b88c5f671659fe24 Mon Sep 17 00:00:00 2001
From: sjh836 <sjh836@gmail.com>
Date: Wed, 15 Sep 2021 01:53:48 +0900
Subject: [PATCH] Change from arrayList to immutableList in
 OrderedComposite#iterator

(cherry picked from commit d9bf57e57288be6147c921c05ca9a4bb56735a13)
---
 .../springframework/batch/core/listener/OrderedComposite.java   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/spring-batch-core/src/main/java/org/springframework/batch/core/listener/OrderedComposite.java b/spring-batch-core/src/main/java/org/springframework/batch/core/listener/OrderedComposite.java
index abd24cbc7..75f9c2516 100644
--- a/spring-batch-core/src/main/java/org/springframework/batch/core/listener/OrderedComposite.java
+++ b/spring-batch-core/src/main/java/org/springframework/batch/core/listener/OrderedComposite.java
@@ -83,7 +83,7 @@ class OrderedComposite<S> {
 	 * @return an iterator over the list of items
 	 */
 	public Iterator<S> iterator() {
-		return new ArrayList<>(list).iterator();
+		return Collections.unmodifiableList(list).iterator();
 	}
 
 	/**