Polishing

spring-beans/src/main/java/org/springframework/beans/annotation/AnnotationBeanUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -19,6 +19,7 @@ package org.springframework.beans.annotation;
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Method;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.HashSet;
 import java.util.Set;
 
@@ -62,7 +63,8 @@ public abstract class AnnotationBeanUtils {
 	public static void copyPropertiesToBean(Annotation ann, Object bean, @Nullable StringValueResolver valueResolver,
 			String... excludedProperties) {
 
-		Set<String> excluded = new HashSet<>(Arrays.asList(excludedProperties));
+		Set<String> excluded = (excludedProperties.length == 0 ? Collections.emptySet() :
+				new HashSet<>(Arrays.asList(excludedProperties)));
 		Method[] annotationProperties = ann.annotationType().getDeclaredMethods();
 		BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(bean);
 		for (Method annotationProperty : annotationProperties) {

spring-beans/src/main/java/org/springframework/beans/factory/support/AutowireUtils.java

@@ -276,7 +276,7 @@ abstract class AutowireUtils {
 
 
 	/**
-	 * Reflective InvocationHandler for lazy access to the current target object.
+	 * Reflective {@link InvocationHandler} for lazy access to the current target object.
 	 */
 	@SuppressWarnings("serial")
 	private static class ObjectFactoryDelegatingInvocationHandler implements InvocationHandler, Serializable {

spring-beans/src/test/java/org/springframework/beans/factory/support/AutowireUtilsTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -27,6 +27,8 @@ import org.springframework.util.ReflectionUtils;
 import static org.junit.Assert.*;
 
 /**
+ * Unit tests for {@link AutowireUtils}.
+ *
  * @author Juergen Hoeller
  * @author Sam Brannen
  */
@@ -36,7 +38,7 @@ public class AutowireUtilsTests {
 	public void genericMethodReturnTypes() {
 		Method notParameterized = ReflectionUtils.findMethod(MyTypeWithMethods.class, "notParameterized");
 		assertEquals(String.class,
-				AutowireUtils.resolveReturnTypeForFactoryMethod(notParameterized, new Object[]{}, getClass().getClassLoader()));
+				AutowireUtils.resolveReturnTypeForFactoryMethod(notParameterized, new Object[0], getClass().getClassLoader()));
 
 		Method notParameterizedWithArguments = ReflectionUtils.findMethod(MyTypeWithMethods.class, "notParameterizedWithArguments", Integer.class, Boolean.class);
 		assertEquals(String.class,

spring-core/src/main/java/org/springframework/core/annotation/AnnotationUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -56,14 +56,14 @@ import org.springframework.util.StringUtils;
  * <p>Note that most of the features of this class are not provided by the
  * JDK's introspection facilities themselves.
  *
- * <p>As a general rule for runtime-retained annotations (e.g. for transaction
- * control, authorization, or service exposure), always use the lookup methods
- * on this class (e.g., {@link #findAnnotation(Method, Class)},
- * {@link #getAnnotation(Method, Class)}, and {@link #getAnnotations(Method)})
- * instead of the plain annotation lookup methods in the JDK. You can still
- * explicitly choose between a <em>get</em> lookup on the given class level only
- * ({@link #getAnnotation(Method, Class)}) and a <em>find</em> lookup in the entire
- * inheritance hierarchy of the given method ({@link #findAnnotation(Method, Class)}).
+ * <p>As a general rule for runtime-retained application annotations (e.g. for
+ * transaction control, authorization, or service exposure), always use the
+ * lookup methods on this class (e.g. {@link #findAnnotation(Method, Class)} or
+ * {@link #getAnnotation(Method, Class)}) instead of the plain annotation lookup
+ * methods in the JDK. You can still explicitly choose between a <em>get</em>
+ * lookup on the given class level only ({@link #getAnnotation(Method, Class)})
+ * and a <em>find</em> lookup in the entire inheritance hierarchy of the given
+ * method ({@link #findAnnotation(Method, Class)}).
  *
  * <h3>Terminology</h3>
  * The terms <em>directly present</em>, <em>indirectly present</em>, and
@@ -476,7 +476,13 @@ public abstract class AnnotationUtils {
 	 * @since 4.2
 	 */
 	@Nullable
-	public static <A extends Annotation> A findAnnotation(AnnotatedElement annotatedElement, Class<A> annotationType) {
+	public static <A extends Annotation> A findAnnotation(
+			AnnotatedElement annotatedElement, @Nullable Class<A> annotationType) {
+
+		if (annotationType == null) {
+			return null;
+		}
+
 		// Do NOT store result in the findAnnotationCache since doing so could break
 		// findAnnotation(Class, Class) and findAnnotation(Method, Class).
 		A ann = findAnnotation(annotatedElement, annotationType, new HashSet<>());
@@ -707,7 +713,7 @@ public abstract class AnnotationUtils {
 	 * @return the first matching annotation, or {@code null} if not found
 	 */
 	@Nullable
-	public static <A extends Annotation> A findAnnotation(Class<?> clazz, Class<A> annotationType) {
+	public static <A extends Annotation> A findAnnotation(Class<?> clazz, @Nullable Class<A> annotationType) {
 		return findAnnotation(clazz, annotationType, true);
 	}
 
@@ -803,8 +809,8 @@ public abstract class AnnotationUtils {
 	 * @param annotationType the annotation type to look for
 	 * @param clazz the class to check for the annotation on (may be {@code null})
 	 * @return the first {@link Class} in the inheritance hierarchy that
-	 * declares an annotation of the specified {@code annotationType}, or
-	 * {@code null} if not found
+	 * declares an annotation of the specified {@code annotationType},
+	 * or {@code null} if not found
 	 * @see Class#isAnnotationPresent(Class)
 	 * @see Class#getDeclaredAnnotations()
 	 * @see #findAnnotationDeclaringClassForTypes(List, Class)
@@ -835,7 +841,7 @@ public abstract class AnnotationUtils {
 	 * one of several candidate {@linkplain Annotation annotations}, so we
 	 * need to handle this explicitly.
 	 * @param annotationTypes the annotation types to look for
-	 * @param clazz the class to check for the annotations on, or {@code null}
+	 * @param clazz the class to check for the annotation on (may be {@code null})
 	 * @return the first {@link Class} in the inheritance hierarchy that
 	 * declares an annotation of at least one of the specified
 	 * {@code annotationTypes}, or {@code null} if not found
@@ -1031,7 +1037,9 @@ public abstract class AnnotationUtils {
 	 * corresponding attribute values as values (never {@code null})
 	 * @see #getAnnotationAttributes(Annotation, boolean, boolean)
 	 */
-	public static Map<String, Object> getAnnotationAttributes(Annotation annotation, boolean classValuesAsString) {
+	public static Map<String, Object> getAnnotationAttributes(
+			Annotation annotation, boolean classValuesAsString) {
+
 		return getAnnotationAttributes(annotation, classValuesAsString, false);
 	}
 
@@ -1051,8 +1059,8 @@ public abstract class AnnotationUtils {
 	 * and corresponding attribute values as values (never {@code null})
 	 * @since 3.1.1
 	 */
-	public static AnnotationAttributes getAnnotationAttributes(Annotation annotation, boolean classValuesAsString,
-			boolean nestedAnnotationsAsMap) {
+	public static AnnotationAttributes getAnnotationAttributes(
+			Annotation annotation, boolean classValuesAsString, boolean nestedAnnotationsAsMap) {
 
 		return getAnnotationAttributes(null, annotation, classValuesAsString, nestedAnnotationsAsMap);
 	}
@@ -1070,7 +1078,9 @@ public abstract class AnnotationUtils {
 	 * @since 4.2
 	 * @see #getAnnotationAttributes(AnnotatedElement, Annotation, boolean, boolean)
 	 */
-	public static AnnotationAttributes getAnnotationAttributes(@Nullable AnnotatedElement annotatedElement, Annotation annotation) {
+	public static AnnotationAttributes getAnnotationAttributes(
+			@Nullable AnnotatedElement annotatedElement, Annotation annotation) {
+
 		return getAnnotationAttributes(annotatedElement, annotation, false, false);
 	}
 
@@ -1448,10 +1458,7 @@ public abstract class AnnotationUtils {
 	 */
 	@Nullable
 	public static Object getDefaultValue(@Nullable Annotation annotation, @Nullable String attributeName) {
-		if (annotation == null) {
-			return null;
-		}
-		return getDefaultValue(annotation.annotationType(), attributeName);
+		return (annotation != null ? getDefaultValue(annotation.annotationType(), attributeName) : null);
 	}
 
 	/**

spring-web/src/main/java/org/springframework/http/server/reactive/AbstractServerHttpRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -42,11 +42,11 @@ import org.springframework.util.StringUtils;
  */
 public abstract class AbstractServerHttpRequest implements ServerHttpRequest {
 
-	private static final Log logger = LogFactory.getLog(ServerHttpRequest.class);
-
 	private static final Pattern QUERY_PATTERN = Pattern.compile("([^&=]+)(=?)([^&]+)?");
 
 
+	private static final Log logger = LogFactory.getLog(ServerHttpRequest.class);
+
 	private final URI uri;
 
 	private final RequestPath path;

spring-web/src/main/java/org/springframework/web/util/HtmlCharacterEntityDecoder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -66,8 +66,9 @@ class HtmlCharacterEntityDecoder {
 					this.originalMessage.indexOf('&', this.nextPotentialReferencePosition);
 
 			if (this.nextSemicolonPosition != -1 &&
-					this.nextSemicolonPosition < this.nextPotentialReferencePosition)
+					this.nextSemicolonPosition < this.nextPotentialReferencePosition) {
 				this.nextSemicolonPosition = this.originalMessage.indexOf(';', this.nextPotentialReferencePosition + 1);
+			}
 
 			boolean isPotentialReference = (this.nextPotentialReferencePosition != -1 &&
 					this.nextSemicolonPosition != -1 &&
@@ -94,12 +95,13 @@ class HtmlCharacterEntityDecoder {
 			int skipUntilIndex = (this.nextPotentialReferencePosition != -1 ?
 					this.nextPotentialReferencePosition : this.originalMessage.length());
 			if (skipUntilIndex - this.currentPosition > 3) {
-				this.decodedMessage.append(this.originalMessage.substring(this.currentPosition, skipUntilIndex));
+				this.decodedMessage.append(this.originalMessage, this.currentPosition, skipUntilIndex);
 				this.currentPosition = skipUntilIndex;
 			}
 			else {
-				while (this.currentPosition < skipUntilIndex)
+				while (this.currentPosition < skipUntilIndex) {
 					this.decodedMessage.append(this.originalMessage.charAt(this.currentPosition++));
+				}
 			}
 		}
 	}

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -419,7 +419,7 @@ public abstract class ResponseEntityExceptionHandler {
 	}
 
 	/**
-	 * Customize the response for NoHandlerFoundException.
+	 * Customize the response for AsyncRequestTimeoutException.
 	 * <p>This method delegates to {@link #handleExceptionInternal}.
 	 * @param ex the exception
 	 * @param headers the headers to be written to the response
@@ -448,7 +448,7 @@ public abstract class ResponseEntityExceptionHandler {
 	}
 
 	/**
-	 * A single place to customize the response body of all Exception types.
+	 * A single place to customize the response body of all exception types.
 	 * <p>The default implementation sets the {@link WebUtils#ERROR_EXCEPTION_ATTRIBUTE}
 	 * request attribute and creates a {@link ResponseEntity} from the given
 	 * body, headers, and status.

src/docs/asciidoc/web/webmvc.adoc

@@ -1354,7 +1354,7 @@ The default mapping pattern `/{asterisk}{asterisk}` is excluded from scoring and
 sorted last. Also prefix patterns such as `/public/{asterisk}{asterisk}` are considered less
 specific than other pattern that don't have double wildcards.
 
-For the full details see `AntPatternComparator` in `AntPathMatcher` and also keep mind that
+For the full details see `AntPatternComparator` in `AntPathMatcher` and also keep in mind that
 the `PathMatcher` implementation used can be customized. See <<mvc-config-path-matching>>
 in the configuration section.