Polishing

spring-context/src/main/java/org/springframework/validation/MessageCodeFormatter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -29,8 +29,8 @@ import org.springframework.lang.Nullable;
 public interface MessageCodeFormatter {
 
 	/**
-	 * Build and return a message code consisting of the given fields, usually delimited
-	 * by {@link DefaultMessageCodesResolver#CODE_SEPARATOR}.
+	 * Build and return a message code consisting of the given fields,
+	 * usually delimited by {@link DefaultMessageCodesResolver#CODE_SEPARATOR}.
 	 * @param errorCode e.g.: "typeMismatch"
 	 * @param objectName e.g.: "user"
 	 * @param field e.g. "age"
@@ -38,4 +38,5 @@ public interface MessageCodeFormatter {
 	 * @see DefaultMessageCodesResolver.Format
 	 */
 	String format(String errorCode, @Nullable String objectName, @Nullable String field);
-}
+
+}

spring-webflux/src/main/java/org/springframework/web/reactive/result/view/BindStatus.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -41,6 +41,7 @@ import org.springframework.web.util.HtmlUtils;
  * tags and macros, the same status class is used for both scenarios.
  *
  * @author Rossen Stoyanchev
+ * @author Juergen Hoeller
  * @since 5.0
  * @see RequestContext#getBindStatus
  */
@@ -58,9 +59,13 @@ public class BindStatus {
 	@Nullable
 	private final Errors errors;
 
+	private final String[] errorCodes;
 
 	@Nullable
-	private BindingResult bindingResult;
+	private String[] errorMessages;
+
+	@Nullable
+	private List<? extends ObjectError> objectErrors;
 
 	@Nullable
 	private Object value;
@@ -75,12 +80,7 @@ public class BindStatus {
 	private PropertyEditor editor;
 
 	@Nullable
-	private List<? extends ObjectError> objectErrors;
-
-	private String[] errorCodes = new String[0];
-
-	@Nullable
-	private String[] errorMessages;
+	private BindingResult bindingResult;
 
 
 	/**
@@ -91,9 +91,7 @@ public class BindStatus {
 	 * @param htmlEscape whether to HTML-escape error messages and string values
 	 * @throws IllegalStateException if no corresponding Errors object found
 	 */
-	public BindStatus(RequestContext requestContext, String path, boolean htmlEscape)
-			throws IllegalStateException {
-
+	public BindStatus(RequestContext requestContext, String path, boolean htmlEscape) throws IllegalStateException {
 		this.requestContext = requestContext;
 		this.path = path;
 		this.htmlEscape = htmlEscape;

spring-webflux/src/main/java/org/springframework/web/reactive/result/view/View.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -16,6 +16,7 @@
 
 package org.springframework.web.reactive.result.view;
 
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 
@@ -46,7 +47,9 @@ public interface View {
 	/**
 	 * Return the list of media types this View supports, or an empty list.
 	 */
-	List<MediaType> getSupportedMediaTypes();
+	default List<MediaType> getSupportedMediaTypes() {
+		return Collections.emptyList();
+	}
 
 	/**
 	 * Whether this View does rendering by performing a redirect.

spring-webmvc/src/main/java/org/springframework/web/servlet/View.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -17,11 +17,9 @@
 package org.springframework.web.servlet;
 
 import java.util.Map;
-
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
-import org.springframework.http.MediaType;
 import org.springframework.lang.Nullable;
 
 /**
@@ -41,6 +39,7 @@ import org.springframework.lang.Nullable;
  *
  * @author Rod Johnson
  * @author Arjen Poutsma
+ * @author Rossen Stoyanchev
  * @see org.springframework.web.servlet.view.AbstractView
  * @see org.springframework.web.servlet.view.InternalResourceView
  */
@@ -49,6 +48,7 @@ public interface View {
 	/**
 	 * Name of the {@link HttpServletRequest} attribute that contains the response status code.
 	 * <p>Note: This attribute is not required to be supported by all View implementations.
+	 * @since 3.0
 	 */
 	String RESPONSE_STATUS_ATTRIBUTE = View.class.getName() + ".responseStatus";
 
@@ -56,41 +56,44 @@ public interface View {
 	 * Name of the {@link HttpServletRequest} attribute that contains a Map with path variables.
 	 * The map consists of String-based URI template variable names as keys and their corresponding
 	 * Object-based values -- extracted from segments of the URL and type converted.
-	 *
 	 * <p>Note: This attribute is not required to be supported by all View implementations.
+	 * @since 3.1
 	 */
 	String PATH_VARIABLES = View.class.getName() + ".pathVariables";
 
 	/**
-	 * The {@link MediaType} selected during content negotiation, which may be
-	 * more specific than the one the View is configured with. For example:
+	 * The {@link org.springframework.http.MediaType} selected during content negotiation,
+	 * which may be more specific than the one the View is configured with. For example:
 	 * "application/vnd.example-v1+xml" vs "application/*+xml".
+	 * @since 3.2
 	 */
 	String SELECTED_CONTENT_TYPE = View.class.getName() + ".selectedContentType";
 
+
 	/**
 	 * Return the content type of the view, if predetermined.
-	 * <p>Can be used to check the content type upfront,
-	 * before the actual rendering process.
+	 * <p>Can be used to check the view's content type upfront,
+	 * i.e. before an actual rendering attempt.
 	 * @return the content type String (optionally including a character set),
-	 * or {@code null} if not predetermined.
+	 * or {@code null} if not predetermined
 	 */
 	@Nullable
-	String getContentType();
+	default String getContentType() {
+		return null;
+	}
 
 	/**
 	 * Render the view given the specified model.
-	 * <p>The first step will be preparing the request: In the JSP case,
-	 * this would mean setting model objects as request attributes.
-	 * The second step will be the actual rendering of the view,
-	 * for example including the JSP via a RequestDispatcher.
+	 * <p>The first step will be preparing the request: In the JSP case, this would mean
+	 * setting model objects as request attributes. The second step will be the actual
+	 * rendering of the view, for example including the JSP via a RequestDispatcher.
 	 * @param model Map with name Strings as keys and corresponding model
 	 * objects as values (Map can also be {@code null} in case of empty model)
 	 * @param request current HTTP request
 	 * @param response HTTP response we are building
 	 * @throws Exception if rendering failed
 	 */
-	void render(@Nullable Map<String, ?> model,
-			HttpServletRequest request, HttpServletResponse response) throws Exception;
+	void render(@Nullable Map<String, ?> model, HttpServletRequest request, HttpServletResponse response)
+			throws Exception;
 
 }

spring-webmvc/src/main/java/org/springframework/web/servlet/support/BindStatus.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -61,8 +61,13 @@ public class BindStatus {
 	@Nullable
 	private final Errors errors;
 
+	private final String[] errorCodes;
+
 	@Nullable
-	private BindingResult bindingResult;
+	private String[] errorMessages;
+
+	@Nullable
+	private List<? extends ObjectError> objectErrors;
 
 	@Nullable
 	private Object value;
@@ -77,12 +82,7 @@ public class BindStatus {
 	private PropertyEditor editor;
 
 	@Nullable
-	private List<? extends ObjectError> objectErrors;
-
-	private String[] errorCodes = new String[0];
-
-	@Nullable
-	private String[] errorMessages;
+	private BindingResult bindingResult;
 
 
 	/**
@@ -141,7 +141,7 @@ public class BindStatus {
 			else {
 				this.objectErrors = this.errors.getGlobalErrors();
 			}
-			initErrorCodes(this.objectErrors);
+			this.errorCodes = initErrorCodes(this.objectErrors);
 		}
 
 		else {
@@ -171,12 +171,13 @@ public class BindStatus {
 	/**
 	 * Extract the error codes from the ObjectError list.
 	 */
-	private void initErrorCodes(List<? extends ObjectError> objectErrors) {
-		this.errorCodes = new String[objectErrors.size()];
+	private static String[] initErrorCodes(List<? extends ObjectError> objectErrors) {
+		String[] errorCodes = new String[objectErrors.size()];
 		for (int i = 0; i < objectErrors.size(); i++) {
 			ObjectError error = objectErrors.get(i);
-			this.errorCodes[i] = error.getCode();
+			errorCodes[i] = error.getCode();
 		}
+		return errorCodes;
 	}