From 1edd1d507832611d6e1352e32eb4956402c2caab Mon Sep 17 00:00:00 2001
From: Phillip Webb <pwebb@vmware.com>
Date: Sat, 14 Oct 2023 23:43:07 -0700
Subject: [PATCH] Protect against NPE when groups property is missing

Closes gh-37888
---
 .../properties/CheckAdditionalSpringConfigurationMetadata.java  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/buildSrc/src/main/java/org/springframework/boot/build/context/properties/CheckAdditionalSpringConfigurationMetadata.java b/buildSrc/src/main/java/org/springframework/boot/build/context/properties/CheckAdditionalSpringConfigurationMetadata.java
index d45b1d4e92..6d8a7f07ec 100644
--- a/buildSrc/src/main/java/org/springframework/boot/build/context/properties/CheckAdditionalSpringConfigurationMetadata.java
+++ b/buildSrc/src/main/java/org/springframework/boot/build/context/properties/CheckAdditionalSpringConfigurationMetadata.java
@@ -93,7 +93,7 @@ public class CheckAdditionalSpringConfigurationMetadata extends SourceTask {
 
 	@SuppressWarnings("unchecked")
 	private void check(String key, Map<String, Object> json, Analysis analysis) {
-		List<Map<String, Object>> groups = (List<Map<String, Object>>) json.get(key);
+		List<Map<String, Object>> groups = (List<Map<String, Object>>) json.getOrDefault(key, Collections.emptyList());
 		List<String> names = groups.stream().map((group) -> (String) group.get("name")).toList();
 		List<String> sortedNames = sortedCopy(names);
 		for (int i = 0; i < names.size(); i++) {