Add "title" message code to ErrorResponse.Builder

See gh-30566

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

@@ -50,6 +50,8 @@ final class DefaultErrorResponseBuilder implements ErrorResponse.Builder {
 
 	private String titleMessageCode;
 
+	private String typeMessageCode;
+
 
 	DefaultErrorResponseBuilder(Throwable ex, HttpStatusCode statusCode, String detail) {
 		Assert.notNull(ex, "Throwable is required");
@@ -60,6 +62,7 @@ final class DefaultErrorResponseBuilder implements ErrorResponse.Builder {
 		this.problemDetail = ProblemDetail.forStatusAndDetail(statusCode, detail);
 		this.detailMessageCode = ErrorResponse.getDefaultDetailMessageCode(ex.getClass(), null);
 		this.titleMessageCode = ErrorResponse.getDefaultTitleMessageCode(ex.getClass());
+		this.typeMessageCode = ErrorResponse.getDefaultTypeMessageCode(ex.getClass());
 	}
 
 
@@ -102,6 +105,12 @@ final class DefaultErrorResponseBuilder implements ErrorResponse.Builder {
 		return this;
 	}
 
+	@Override
+	public ErrorResponse.Builder typeMessageCode(String messageCode) {
+		this.typeMessageCode = messageCode;
+		return this;
+	}
+
 	@Override
 	public ErrorResponse.Builder title(@Nullable String title) {
 		this.problemDetail.setTitle(title);
@@ -131,7 +140,8 @@ final class DefaultErrorResponseBuilder implements ErrorResponse.Builder {
 	public ErrorResponse build() {
 		return new SimpleErrorResponse(
 				this.exception, this.statusCode, this.headers, this.problemDetail,
-				this.detailMessageCode, this.detailMessageArguments, this.titleMessageCode);
+				this.detailMessageCode, this.detailMessageArguments, this.titleMessageCode,
+				this.typeMessageCode);
 	}
 
 
@@ -155,9 +165,12 @@ final class DefaultErrorResponseBuilder implements ErrorResponse.Builder {
 
 		private final String titleMessageCode;
 
+		private final String typeMessageCode;
+
 		SimpleErrorResponse(
 				Throwable ex, HttpStatusCode statusCode, @Nullable HttpHeaders headers, ProblemDetail problemDetail,
-				String detailMessageCode, @Nullable Object[] detailMessageArguments, String titleMessageCode) {
+				String detailMessageCode, @Nullable Object[] detailMessageArguments, String titleMessageCode,
+				String typeMessageCode) {
 
 			this.exception = ex;
 			this.statusCode = statusCode;
@@ -166,6 +179,7 @@ final class DefaultErrorResponseBuilder implements ErrorResponse.Builder {
 			this.detailMessageCode = detailMessageCode;
 			this.detailMessageArguments = detailMessageArguments;
 			this.titleMessageCode = titleMessageCode;
+			this.typeMessageCode = typeMessageCode;
 		}
 
 		@Override
@@ -198,6 +212,11 @@ final class DefaultErrorResponseBuilder implements ErrorResponse.Builder {
 			return this.titleMessageCode;
 		}
 
+		@Override
+		public String getTypeMessageCode() {
+			return this.typeMessageCode;
+		}
+
 		@Override
 		public String toString() {
 			return "ErrorResponse{status=" + this.statusCode + ", " +

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

@@ -239,6 +239,17 @@ public interface ErrorResponse {
 		 */
 		Builder type(URI type);
 
+		/**
+		 * Customize the {@link MessageSource} code to use to resolve the value
+		 * for {@link ProblemDetail#setType(URI)}.
+		 * <p>By default, set from {@link ErrorResponse#getDefaultTypeMessageCode(Class)}.
+		 * @param messageCode the message code to use
+		 * @return the same builder instance
+		 * @since 6.1
+		 * @see ErrorResponse#getTypeMessageCode()
+		 */
+		Builder typeMessageCode(String messageCode);
+
 		/**
 		 * Set the underlying {@link ProblemDetail#setTitle(String) title} field.
 		 * @return the same builder instance
@@ -246,11 +257,9 @@ public interface ErrorResponse {
 		Builder title(@Nullable String title);
 
 		/**
-		 * Customize the {@link MessageSource} code for looking up the value for
+		 * Customize the {@link MessageSource} code to use to resolve the value
-		 * the underlying {@link ProblemDetail#setTitle(String) title}.
+		 * for {@link ProblemDetail#setTitle(String)}.
-		 * <p>By default, set via
+		 * <p>By default, set from {@link ErrorResponse#getDefaultTitleMessageCode(Class)}.
-		 * {@link ErrorResponse#getDefaultTitleMessageCode(Class)} with the
-		 * associated Exception type.
 		 * @param messageCode the message code to use
 		 * @return the same builder instance
 		 * @see ErrorResponse#getTitleMessageCode()
@@ -270,11 +279,9 @@ public interface ErrorResponse {
 		Builder detail(String detail);
 
 		/**
-		 * Customize the {@link MessageSource} code for looking up the value for
+		 * Customize the {@link MessageSource} code to use to resolve the value
-		 * the underlying {@link #detail(String) detail}.
+		 * for the {@link #detail(String)}.
-		 * <p>By default, this is set to
+		 * <p>By default, set from {@link ErrorResponse#getDefaultDetailMessageCode(Class, String)}.
-		 * {@link ErrorResponse#getDefaultDetailMessageCode(Class, String)} with the
-		 * associated Exception type.
 		 * @param messageCode the message code to use
 		 * @return the same builder instance
 		 * @see ErrorResponse#getDetailMessageCode()