Polishing contribution

Closes gh-34333

spring-messaging/src/main/java/org/springframework/messaging/simp/user/UserDestinationMessageHandler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2024 the original author or authors.
+ * Copyright 2002-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -280,11 +280,10 @@ public class UserDestinationMessageHandler implements MessageHandler, SmartLifec
 			return this.messagingTemplate;
 		}
 
-		public void send(UserDestinationResult destinationResult, Message<?> message) throws MessagingException {
+		public void send(UserDestinationResult result, Message<?> message) throws MessagingException {
-			Iterator<String> itr = destinationResult.getSessionIds().iterator();
+			Iterator<String> itr = result.getSessionIds().iterator();
-
+			for (String target : result.getTargetDestinations()) {
-			for (String target : destinationResult.getTargetDestinations()) {
+				String sessionId = (itr.hasNext() ? itr.next() : null);
-				String sessionId = (itr != null && itr.hasNext() ? itr.next() : null);
 				getTemplateToUse(sessionId).send(target, message);
 			}
 		}

spring-messaging/src/main/java/org/springframework/messaging/simp/user/UserDestinationResult.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2023 the original author or authors.
+ * Copyright 2002-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -44,7 +44,11 @@ public class UserDestinationResult {
 	private final Set<String> sessionIds;
 
 
-	public UserDestinationResult(String sourceDestination, Set<String> targetDestinations,
+	/**
+	 * Main constructor.
+	 */
+	public UserDestinationResult(
+			String sourceDestination, Set<String> targetDestinations,
 			String subscribeDestination, @Nullable String user) {
 
 		this(sourceDestination, targetDestinations, subscribeDestination, user, null);
@@ -114,7 +118,6 @@ public class UserDestinationResult {
 	/**
 	 * Return the session id for the targetDestination.
 	 */
-	@Nullable
 	public Set<String> getSessionIds() {
 		return this.sessionIds;
 	}

spring-messaging/src/test/java/org/springframework/messaging/simp/user/UserDestinationMessageHandlerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2024 the original author or authors.
+ * Copyright 2002-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.