Polishing contribution

Closes gh-29634

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/RequestMappingInfoHandlerMapping.java

@@ -170,8 +170,11 @@ public abstract class RequestMappingInfoHandlerMapping extends AbstractHandlerMe
 	protected HandlerMethod handleNoMatch(Set<RequestMappingInfo> infos,
 			ServerWebExchange exchange) throws Exception {
 
-		PartialMatchHelper helper = PartialMatchHelper.from(infos, exchange);
+		if (CollectionUtils.isEmpty(infos)) {
+			return null;
+		}
 
+		PartialMatchHelper helper = new PartialMatchHelper(infos, exchange);
 		if (helper.isEmpty()) {
 			return null;
 		}
@@ -222,12 +225,10 @@ public abstract class RequestMappingInfoHandlerMapping extends AbstractHandlerMe
 	 */
 	private static final class PartialMatchHelper {
 
-		private static final PartialMatchHelper EMPTY_HELPER = new PartialMatchHelper(Collections.emptySet(), null);
-
 		private final List<PartialMatch> partialMatches = new ArrayList<>();
 
 
-		private PartialMatchHelper(Set<RequestMappingInfo> infos, ServerWebExchange exchange) {
+		PartialMatchHelper(Set<RequestMappingInfo> infos, ServerWebExchange exchange) {
 			for (RequestMappingInfo info : infos) {
 				if (info.getPatternsCondition().getMatchingCondition(exchange) != null) {
 					this.partialMatches.add(new PartialMatch(info, exchange));
@@ -235,13 +236,6 @@ public abstract class RequestMappingInfoHandlerMapping extends AbstractHandlerMe
 			}
 		}
 
-		public static PartialMatchHelper from(Set<RequestMappingInfo> infos, ServerWebExchange exchange) {
-			if (CollectionUtils.isEmpty(infos)) {
-				return EMPTY_HELPER;
-			}
-			return new PartialMatchHelper(infos, exchange);
-		}
-
 		/**
 		 * Whether there are any partial matches.
 		 */

spring-webflux/src/test/java/org/springframework/web/reactive/result/method/RequestMappingInfoHandlerMappingTests.java

@@ -346,9 +346,9 @@ public class RequestMappingInfoHandlerMappingTests {
 
 	}
 
-	@Test
-	public void handleNoMatchEmptyRequestMappingInfo() throws Exception {
-		ServerWebExchange exchange = MockServerWebExchange.from(post("/bar"));
+	@Test // gh-29611
+	public void handleNoMatchWithoutPartialMatches() throws Exception {
+		ServerWebExchange exchange = MockServerWebExchange.from(post("/non-existent"));
 
 		HandlerMethod handlerMethod = this.handlerMapping.handleNoMatch(new HashSet<>(), exchange);
 		assertThat(handlerMethod).isNull();

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/RequestMappingInfoHandlerMapping.java

@@ -246,7 +246,11 @@ public abstract class RequestMappingInfoHandlerMapping extends AbstractHandlerMe
 	protected HandlerMethod handleNoMatch(
 			Set<RequestMappingInfo> infos, String lookupPath, HttpServletRequest request) throws ServletException {
 
-		PartialMatchHelper helper = PartialMatchHelper.from(infos, request);
+		if (CollectionUtils.isEmpty(infos)) {
+			return null;
+		}
+
+		PartialMatchHelper helper = new PartialMatchHelper(infos, request);
 		if (helper.isEmpty()) {
 			return null;
 		}
@@ -295,11 +299,9 @@ public abstract class RequestMappingInfoHandlerMapping extends AbstractHandlerMe
 	 */
 	private static final class PartialMatchHelper {
 
-		private static final PartialMatchHelper EMPTY_HELPER = new PartialMatchHelper(Collections.emptySet(), null);
-
 		private final List<PartialMatch> partialMatches = new ArrayList<>();
 
-		private PartialMatchHelper(Set<RequestMappingInfo> infos, HttpServletRequest request) {
+		PartialMatchHelper(Set<RequestMappingInfo> infos, HttpServletRequest request) {
 			for (RequestMappingInfo info : infos) {
 				if (info.getActivePatternsCondition().getMatchingCondition(request) != null) {
 					this.partialMatches.add(new PartialMatch(info, request));
@@ -307,13 +309,6 @@ public abstract class RequestMappingInfoHandlerMapping extends AbstractHandlerMe
 			}
 		}
 
-		public static PartialMatchHelper from(Set<RequestMappingInfo> infos, HttpServletRequest request) {
-			if (CollectionUtils.isEmpty(infos)) {
-				return EMPTY_HELPER;
-			}
-			return new PartialMatchHelper(infos, request);
-		}
-
 		/**
 		 * Whether there are any partial matches.
 		 */

spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/RequestMappingInfoHandlerMappingTests.java

@@ -398,14 +398,15 @@ class RequestMappingInfoHandlerMappingTests {
 		assertThat(uriVariables.get("cars")).isEqualTo("cars");
 	}
 
-	@PathPatternsParameterizedTest
-	void handleNoMatchEmptyRequestMappingInfo(TestRequestMappingInfoHandlerMapping mapping) throws ServletException {
-		MockHttpServletRequest request = new MockHttpServletRequest("GET", "/cars;color=green");
+	@PathPatternsParameterizedTest // gh-29611
+	void handleNoMatchWithoutPartialMatches(TestRequestMappingInfoHandlerMapping mapping) throws ServletException {
+		String path = "/non-existent";
+		MockHttpServletRequest request = new MockHttpServletRequest("GET", path);
 
-		HandlerMethod handlerMethod = mapping.handleNoMatch(new HashSet<>(), "/{cars}", request);
+		HandlerMethod handlerMethod = mapping.handleNoMatch(new HashSet<>(), path, request);
 		assertThat(handlerMethod).isNull();
 
-		handlerMethod = mapping.handleNoMatch(null, "/{cars}", request);
+		handlerMethod = mapping.handleNoMatch(null, path, request);
 		assertThat(handlerMethod).isNull();
 	}