From c052ff904fd59720c9bc0ae2bf659d7beb0b1e97 Mon Sep 17 00:00:00 2001
From: DevSeongmin <hsm990423@gmail.com>
Date: Mon, 4 Aug 2025 16:52:50 +0900
Subject: [PATCH] GH-4935: Fix RecordFieldExtractor to respect names() for Java
 Record types

Signed-off-by: DevSeongmin <hsm990423@gmail.com>
---
 .../batch/item/file/builder/FlatFileItemWriterBuilder.java     | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/file/builder/FlatFileItemWriterBuilder.java b/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/file/builder/FlatFileItemWriterBuilder.java
index 7de7de5301..1f1358ac51 100644
--- a/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/file/builder/FlatFileItemWriterBuilder.java
+++ b/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/file/builder/FlatFileItemWriterBuilder.java
@@ -392,6 +392,9 @@ public FormatterLineAggregator<T> build() {
 			if (this.fieldExtractor == null) {
 				if (this.sourceType != null && this.sourceType.isRecord()) {
 					this.fieldExtractor = new RecordFieldExtractor<>(this.sourceType);
+					if (!this.names.isEmpty()) {
+						((RecordFieldExtractor<?>) this.fieldExtractor).setNames(this.names.toArray(new String[0]));
+					}
 				}
 				else {
 					BeanWrapperFieldExtractor<T> beanWrapperFieldExtractor = new BeanWrapperFieldExtractor<>();