Minor refactoring after recent commits

See gh-29384

spring-web/src/main/java/org/springframework/web/ErrorResponse.java

@@ -100,14 +100,15 @@ public interface ErrorResponse {
 	 * <p>By default this is initialized via
 	 * {@link #getDefaultDetailMessageCode(Class, String)}.
 	 */
-	default String getTitleCode() {
+	default String getTitleMessageCode() {
 		return getDefaultTitleMessageCode(getClass());
 	}
 
 	/**
 	 * Resolve the {@link #getDetailMessageCode() detailMessageCode} and the
-	 * {@link #getTitleCode() titleCode} through the given {@link MessageSource},
+	 * {@link #getTitleMessageCode() titleCode} through the given
-	 * and if found, update the "detail" and "title!" fields respectively.
+	 * {@link MessageSource}, and if found, update the "detail" and "title!"
+	 * fields respectively.
 	 * @param messageSource the {@code MessageSource} to use for the lookup
 	 * @param locale the {@code Locale} to use for the lookup
 	 */
@@ -118,7 +119,7 @@ public interface ErrorResponse {
 			if (detail != null) {
 				getBody().setDetail(detail);
 			}
-			String title = messageSource.getMessage(getTitleCode(), null, null, locale);
+			String title = messageSource.getMessage(getTitleMessageCode(), null, null, locale);
 			if (title != null) {
 				getBody().setTitle(title);
 			}

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

@@ -306,12 +306,11 @@ public abstract class ResponseEntityExceptionHandler implements MessageSourceAwa
 	 * @return the created {@code ProblemDetail} instance
 	 */
 	protected ProblemDetail createProblemDetail(
-			Exception ex, HttpStatusCode status, @Nullable HttpHeaders headers,
+			Exception ex, HttpStatusCode status, String defaultDetail, @Nullable String detailMessageCode,
-			String defaultDetail, @Nullable String detailMessageCode, @Nullable Object[] detailMessageArguments,
+			@Nullable Object[] detailMessageArguments, ServerWebExchange exchange) {
-			ServerWebExchange exchange) {
 
 		ErrorResponse response = ErrorResponse.createFor(
-				ex, status, headers, defaultDetail, detailMessageCode, detailMessageArguments);
+				ex, status, null, defaultDetail, detailMessageCode, detailMessageArguments);
 
 		return response.updateAndGetBody(this.messageSource, getLocale(exchange));
 	}

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

@@ -279,7 +279,7 @@ public class ResponseEntityExceptionHandlerTests {
 
 		public Mono<ResponseEntity<Object>> handleException(IllegalStateException ex, ServerWebExchange exchange) {
 			HttpStatus status = HttpStatus.INTERNAL_SERVER_ERROR;
-			ProblemDetail body = createProblemDetail(ex, status, null, ex.getMessage(), null, new Object[] {"A"}, exchange);
+			ProblemDetail body = createProblemDetail(ex, status, ex.getMessage(), null, new Object[] {"A"}, exchange);
 			return handleExceptionInternal(ex, body, null, status, exchange);
 		}
 	}

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

@@ -394,7 +394,7 @@ public abstract class ResponseEntityExceptionHandler implements MessageSourceAwa
 
 		Object[] args = {ex.getPropertyName(), ex.getValue()};
 		String defaultDetail = "Failed to convert '" + args[0] + "' with value: '" + args[1] + "'";
-		ProblemDetail body = createProblemDetail(ex, status, headers, defaultDetail, null, args, request);
+		ProblemDetail body = createProblemDetail(ex, status, defaultDetail, null, args, request);
 
 		return handleExceptionInternal(ex, body, headers, status, request);
 	}
@@ -419,7 +419,7 @@ public abstract class ResponseEntityExceptionHandler implements MessageSourceAwa
 		Object[] args = {ex.getPropertyName(), ex.getValue()};
 		String defaultDetail = "Failed to convert '" + args[0] + "' with value: '" + args[1] + "'";
 		String messageCode = ErrorResponse.getDefaultDetailMessageCode(TypeMismatchException.class, null);
-		ProblemDetail body = createProblemDetail(ex, status, headers, defaultDetail, messageCode, args, request);
+		ProblemDetail body = createProblemDetail(ex, status, defaultDetail, messageCode, args, request);
 
 		return handleExceptionInternal(ex, body, headers, status, request);
 	}
@@ -441,7 +441,7 @@ public abstract class ResponseEntityExceptionHandler implements MessageSourceAwa
 	protected ResponseEntity<Object> handleHttpMessageNotReadable(
 			HttpMessageNotReadableException ex, HttpHeaders headers, HttpStatusCode status, WebRequest request) {
 
-		ProblemDetail body = createProblemDetail(ex, status, headers, "Failed to read request", null, null, request);
+		ProblemDetail body = createProblemDetail(ex, status, "Failed to read request", null, null, request);
 		return handleExceptionInternal(ex, body, headers, status, request);
 	}
 
@@ -462,7 +462,7 @@ public abstract class ResponseEntityExceptionHandler implements MessageSourceAwa
 	protected ResponseEntity<Object> handleHttpMessageNotWritable(
 			HttpMessageNotWritableException ex, HttpHeaders headers, HttpStatusCode status, WebRequest request) {
 
-		ProblemDetail body = createProblemDetail(ex, status, headers, "Failed to write request", null, null, request);
+		ProblemDetail body = createProblemDetail(ex, status, "Failed to write request", null, null, request);
 		return handleExceptionInternal(ex, body, headers, status, request);
 	}
 
@@ -505,12 +505,11 @@ public abstract class ResponseEntityExceptionHandler implements MessageSourceAwa
 	 * @since 6.0
 	 */
 	protected ProblemDetail createProblemDetail(
-			Exception ex, HttpStatusCode status, @Nullable HttpHeaders headers,
+			Exception ex, HttpStatusCode status, String defaultDetail, @Nullable String detailMessageCode,
-			String defaultDetail, @Nullable String detailMessageCode, @Nullable Object[] detailMessageArguments,
+			@Nullable Object[] detailMessageArguments, WebRequest request) {
-			WebRequest request) {
 
 		ErrorResponse errorResponse = ErrorResponse.createFor(
-				ex, status, headers, defaultDetail, detailMessageCode, detailMessageArguments);
+				ex, status, null, defaultDetail, detailMessageCode, detailMessageArguments);
 
 		return errorResponse.updateAndGetBody(this.messageSource, LocaleContextHolder.getLocale());
 	}