Polishing

spring-context/src/main/java/org/springframework/context/ConfigurableApplicationContext.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -148,11 +148,12 @@ public interface ConfigurableApplicationContext extends ApplicationContext, Life
 	void addProtocolResolver(ProtocolResolver resolver);
 
 	/**
-	 * Load or refresh the persistent representation of the configuration,
-	 * which might an XML file, properties file, or relational database schema.
+	 * Load or refresh the persistent representation of the configuration, which
+	 * might be from Java-based configuration, an XML file, a properties file, a
+	 * relational database schema, or some other format.
 	 * <p>As this is a startup method, it should destroy already created singletons
 	 * if it fails, to avoid dangling resources. In other words, after invocation
-	 * of that method, either all or no singletons at all should be instantiated.
+	 * of this method, either all or no singletons at all should be instantiated.
 	 * @throws BeansException if the bean factory could not be initialized
 	 * @throws IllegalStateException if already initialized and multiple refresh
 	 * attempts are not supported

spring-context/src/main/java/org/springframework/ejb/config/AbstractJndiLocatingBeanDefinitionParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2007 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -24,7 +24,9 @@
 import org.springframework.util.StringUtils;
 import org.springframework.util.xml.DomUtils;
 
-import static org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.*;
+import static org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.DEFAULT_VALUE;
+import static org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.LAZY_INIT_ATTRIBUTE;
+import static org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.TRUE_VALUE;
 
 /**
  * Abstract base class for BeanDefinitionParsers which build
@@ -47,8 +49,9 @@ abstract class AbstractJndiLocatingBeanDefinitionParser extends AbstractSimpleBe
 
 	@Override
 	protected boolean isEligibleAttribute(String attributeName) {
-		return (super.isEligibleAttribute(attributeName) && !ENVIRONMENT_REF.equals(attributeName) && !LAZY_INIT_ATTRIBUTE
-				.equals(attributeName));
+		return (super.isEligibleAttribute(attributeName) &&
+				!ENVIRONMENT_REF.equals(attributeName) &&
+				!LAZY_INIT_ATTRIBUTE.equals(attributeName));
 	}
 
 	@Override

spring-jdbc/src/main/java/org/springframework/jdbc/core/metadata/GenericCallMetaDataProvider.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -43,12 +43,11 @@
  */
 public class GenericCallMetaDataProvider implements CallMetaDataProvider {
 
-	/** Logger available to subclasses */
+	/** Logger available to subclasses. */
 	protected static final Log logger = LogFactory.getLog(CallMetaDataProvider.class);
 
-	private boolean procedureColumnMetaDataUsed = false;
 
-	private String userName;
+	private final String userName;
 
 	private boolean supportsCatalogsInProcedureCalls = true;
 
@@ -58,7 +57,9 @@ public class GenericCallMetaDataProvider implements CallMetaDataProvider {
 
 	private boolean storesLowerCaseIdentifiers = false;
 
-	private List<CallParameterMetaData> callParameterMetaData = new ArrayList<>();
+	private boolean procedureColumnMetaDataUsed = false;
+
+	private final List<CallParameterMetaData> callParameterMetaData = new ArrayList<>();
 
 
 	/**

spring-webflux/src/main/java/org/springframework/web/reactive/config/CorsRegistration.java

@@ -16,7 +16,6 @@
 
 package org.springframework.web.reactive.config;
 
-import java.util.ArrayList;
 import java.util.Arrays;
 
 import org.springframework.web.cors.CorsConfiguration;
@@ -28,6 +27,7 @@
  * @author Sebastien Deleuze
  * @author Rossen Stoyanchev
  * @since 5.0
+ * @see CorsConfiguration
  * @see CorsRegistry
  */
 public class CorsRegistration {
@@ -39,6 +39,7 @@ public class CorsRegistration {
 
 	public CorsRegistration(String pathPattern) {
 		this.pathPattern = pathPattern;
+		// Same implicit default values as the @CrossOrigin annotation + allows simple methods
 		this.config = new CorsConfiguration().applyPermitDefaultValues();
 	}
 
@@ -58,7 +59,7 @@ public CorsRegistration(String pathPattern) {
 	 * See the Spring Framework reference for more on this filter.
 	 */
 	public CorsRegistration allowedOrigins(String... origins) {
-		this.config.setAllowedOrigins(new ArrayList<>(Arrays.asList(origins)));
+		this.config.setAllowedOrigins(Arrays.asList(origins));
 		return this;
 	}
 
@@ -69,7 +70,7 @@ public CorsRegistration allowedOrigins(String... origins) {
 	 * are allowed.
 	 */
 	public CorsRegistration allowedMethods(String... methods) {
-		this.config.setAllowedMethods(new ArrayList<>(Arrays.asList(methods)));
+		this.config.setAllowedMethods(Arrays.asList(methods));
 		return this;
 	}
 
@@ -83,7 +84,7 @@ public CorsRegistration allowedMethods(String... methods) {
 	 * <p>By default all headers are allowed.
 	 */
 	public CorsRegistration allowedHeaders(String... headers) {
-		this.config.setAllowedHeaders(new ArrayList<>(Arrays.asList(headers)));
+		this.config.setAllowedHeaders(Arrays.asList(headers));
 		return this;
 	}
 
@@ -96,7 +97,7 @@ public CorsRegistration allowedHeaders(String... headers) {
 	 * <p>By default this is not set.
 	 */
 	public CorsRegistration exposedHeaders(String... headers) {
-		this.config.setExposedHeaders(new ArrayList<>(Arrays.asList(headers)));
+		this.config.setExposedHeaders(Arrays.asList(headers));
 		return this;
 	}
 

spring-webflux/src/main/java/org/springframework/web/reactive/config/CorsRegistry.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -37,25 +37,23 @@ public class CorsRegistry {
 
 
 	/**
-	 * Enable cross origin request handling for the specified path pattern.
-	 *
+	 * Enable cross-origin request handling for the specified path pattern.
 	 * <p>Exact path mapping URIs (such as {@code "/admin"}) are supported as
 	 * well as Ant-style path patterns (such as {@code "/admin/**"}).
-	 *
-	 * <p>The following defaults are applied to the {@link CorsRegistration}:
-	 * <ul>
-	 *     <li>Allow all origins.</li>
-	 *     <li>Allow "simple" methods {@code GET}, {@code HEAD} and {@code POST}.</li>
-	 *     <li>Allow all headers.</li>
-	 *     <li>Set max age to 1800 seconds (30 minutes).</li>
-	 * </ul>
+	 * <p>By default, the {@code CorsConfiguration} for this mapping is
+	 * initialized with default values as described in
+	 * {@link CorsConfiguration#applyPermitDefaultValues()}.
 	 */
 	public CorsRegistration addMapping(String pathPattern) {
 		CorsRegistration registration = new CorsRegistration(pathPattern);
 		this.registrations.add(registration);
 		return registration;
 	}
 
+	/**
+	 * Return the registered {@link CorsConfiguration} objects,
+	 * keyed by path pattern.
+	 */
 	protected Map<String, CorsConfiguration> getCorsConfigurations() {
 		Map<String, CorsConfiguration> configs = new LinkedHashMap<>(this.registrations.size());
 		for (CorsRegistration registration : this.registrations) {

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -83,7 +83,7 @@ class ControllerMethodResolver {
 					AnnotationUtils.findAnnotation(method, ModelAttribute.class) != null);
 
 
-	private static Log logger = LogFactory.getLog(ControllerMethodResolver.class);
+	private static final Log logger = LogFactory.getLog(ControllerMethodResolver.class);
 
 	private final List<SyncHandlerMethodArgumentResolver> initBinderResolvers;
 
@@ -95,14 +95,12 @@ class ControllerMethodResolver {
 
 	private final ReactiveAdapterRegistry reactiveAdapterRegistry;
 
-
 	private final Map<Class<?>, Set<Method>> initBinderMethodCache = new ConcurrentHashMap<>(64);
 
 	private final Map<Class<?>, Set<Method>> modelAttributeMethodCache = new ConcurrentHashMap<>(64);
 
 	private final Map<Class<?>, ExceptionHandlerMethodResolver> exceptionHandlerCache = new ConcurrentHashMap<>(64);
 
-
 	private final Map<ControllerAdviceBean, Set<Method>> initBinderAdviceCache = new LinkedHashMap<>(64);
 
 	private final Map<ControllerAdviceBean, Set<Method>> modelAttributeAdviceCache = new LinkedHashMap<>(64);
@@ -169,7 +167,7 @@ private static List<HandlerMethodArgumentResolver> initResolvers(ArgumentResolve
 		boolean requestMappingMethod = !readers.isEmpty() && supportDataBinding;
 
 		// Annotation-based...
-		List<HandlerMethodArgumentResolver> result = new ArrayList<>();
+		List<HandlerMethodArgumentResolver> result = new ArrayList<>(30);
 		result.add(new RequestParamMethodArgumentResolver(beanFactory, adapterRegistry, false));
 		result.add(new RequestParamMapMethodArgumentResolver(adapterRegistry));
 		result.add(new PathVariableMethodArgumentResolver(beanFactory, adapterRegistry));

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -38,7 +38,6 @@
  */
 public class RequestAttributeMethodArgumentResolver extends AbstractNamedValueSyncArgumentResolver {
 
-
 	/**
 	 * @param factory a bean factory to use for resolving  ${...}
 	 * placeholder and #{...} SpEL expressions in default values;

spring-webmvc/src/main/java/org/springframework/web/servlet/config/annotation/CorsRegistration.java

@@ -67,19 +67,19 @@ public CorsRegistration allowedOrigins(String... origins) {
 
 	/**
 	 * Set the HTTP methods to allow, e.g. {@code "GET"}, {@code "POST"}, etc.
-	 * The special value {@code "*"} allows all methods.
-	 * <p>By default "simple" methods, i.e. {@code GET}, {@code HEAD}, and
-	 * {@code POST} are allowed.
+	 * <p>The special value {@code "*"} allows all methods.
+	 * <p>By default "simple" methods {@code GET}, {@code HEAD}, and {@code POST}
+	 * are allowed.
 	 */
 	public CorsRegistration allowedMethods(String... methods) {
 		this.config.setAllowedMethods(Arrays.asList(methods));
 		return this;
 	}
 
 	/**
-	 * Set the list of headers that a preflight request can list as allowed
-	 * for use during an actual request. The special value {@code "*"} may be
-	 * used to allow all headers.
+	 * Set the list of headers that a pre-flight request can list as allowed
+	 * for use during an actual request.
+	 * <p>The special value {@code "*"} may be used to allow all headers.
 	 * <p>A header name is not required to be listed if it is one of:
 	 * {@code Cache-Control}, {@code Content-Language}, {@code Expires},
 	 * {@code Last-Modified}, or {@code Pragma} as per the CORS spec.

spring-webmvc/src/main/java/org/springframework/web/servlet/config/annotation/CorsRegistry.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -39,20 +39,11 @@ public class CorsRegistry {
 
 	/**
 	 * Enable cross-origin request handling for the specified path pattern.
-	 *
 	 * <p>Exact path mapping URIs (such as {@code "/admin"}) are supported as
 	 * well as Ant-style path patterns (such as {@code "/admin/**"}).
-	 * <p>By default, all origins, all headers, credentials and {@code GET},
-	 * {@code HEAD}, and {@code POST} methods are allowed, and the max age
-	 * is set to 30 minutes.
-	 *
-	 * <p>The following defaults are applied to the {@link CorsRegistration}:
-	 * <ul>
-	 *     <li>Allow all origins.</li>
-	 *     <li>Allow "simple" methods {@code GET}, {@code HEAD} and {@code POST}.</li>
-	 *     <li>Allow all headers.</li>
-	 *     <li>Set max age to 1800 seconds (30 minutes).</li>
-	 * </ul>
+	 * <p>By default, the {@code CorsConfiguration} for this mapping is
+	 * initialized with default values as described in
+	 * {@link CorsConfiguration#applyPermitDefaultValues()}.
 	 */
 	public CorsRegistration addMapping(String pathPattern) {
 		CorsRegistration registration = new CorsRegistration(pathPattern);

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -151,7 +151,7 @@ public class RequestMappingHandlerAdapter extends AbstractHandlerMethodAdapter
 
 	private List<HttpMessageConverter<?>> messageConverters;
 
-	private List<Object> requestResponseBodyAdvice = new ArrayList<>();
+	private final List<Object> requestResponseBodyAdvice = new ArrayList<>();
 
 	@Nullable
 	private WebBindingInitializer webBindingInitializer;
@@ -180,7 +180,6 @@ public class RequestMappingHandlerAdapter extends AbstractHandlerMethodAdapter
 	@Nullable
 	private ConfigurableBeanFactory beanFactory;
 
-
 	private final Map<Class<?>, SessionAttributesHandler> sessionAttributesHandlerCache = new ConcurrentHashMap<>(64);
 
 	private final Map<Class<?>, Set<Method>> initBinderCache = new ConcurrentHashMap<>(64);
@@ -412,7 +411,7 @@ public void setTaskExecutor(AsyncTaskExecutor taskExecutor) {
 	 * processing thread has exited and ends when the request is dispatched again
 	 * for further processing of the concurrently produced result.
 	 * <p>If this value is not set, the default timeout of the underlying
-	 * implementation is used, e.g. 10 seconds on Tomcat with Servlet 3.
+	 * implementation is used.
 	 * @param timeout the timeout value in milliseconds
 	 */
 	public void setAsyncRequestTimeout(long timeout) {
@@ -639,7 +638,7 @@ private void initControllerAdviceCache() {
 	 * and custom resolvers provided via {@link #setCustomArgumentResolvers}.
 	 */
 	private List<HandlerMethodArgumentResolver> getDefaultArgumentResolvers() {
-		List<HandlerMethodArgumentResolver> resolvers = new ArrayList<>();
+		List<HandlerMethodArgumentResolver> resolvers = new ArrayList<>(30);
 
 		// Annotation-based argument resolution
 		resolvers.add(new RequestParamMethodArgumentResolver(getBeanFactory(), false));
@@ -686,7 +685,7 @@ private List<HandlerMethodArgumentResolver> getDefaultArgumentResolvers() {
 	 * methods including built-in and custom resolvers.
 	 */
 	private List<HandlerMethodArgumentResolver> getDefaultInitBinderArgumentResolvers() {
-		List<HandlerMethodArgumentResolver> resolvers = new ArrayList<>();
+		List<HandlerMethodArgumentResolver> resolvers = new ArrayList<>(20);
 
 		// Annotation-based argument resolution
 		resolvers.add(new RequestParamMethodArgumentResolver(getBeanFactory(), false));
@@ -719,7 +718,7 @@ private List<HandlerMethodArgumentResolver> getDefaultInitBinderArgumentResolver
 	 * custom handlers provided via {@link #setReturnValueHandlers}.
 	 */
 	private List<HandlerMethodReturnValueHandler> getDefaultReturnValueHandlers() {
-		List<HandlerMethodReturnValueHandler> handlers = new ArrayList<>();
+		List<HandlerMethodReturnValueHandler> handlers = new ArrayList<>(20);
 
 		// Single-purpose return value types
 		handlers.add(new ModelAndViewMethodReturnValueHandler());
@@ -834,7 +833,7 @@ private SessionAttributesHandler getSessionAttributesHandler(HandlerMethod handl
 			synchronized (this.sessionAttributesHandlerCache) {
 				sessionAttrHandler = this.sessionAttributesHandlerCache.get(handlerType);
 				if (sessionAttrHandler == null) {
-					sessionAttrHandler = new SessionAttributesHandler(handlerType, sessionAttributeStore);
+					sessionAttrHandler = new SessionAttributesHandler(handlerType, this.sessionAttributeStore);
 					this.sessionAttributesHandlerCache.put(handlerType, sessionAttrHandler);
 				}
 			}
@@ -957,9 +956,9 @@ private WebDataBinderFactory getDataBinderFactory(HandlerMethod handlerMethod) t
 		}
 		List<InvocableHandlerMethod> initBinderMethods = new ArrayList<>();
 		// Global methods first
-		this.initBinderAdviceCache.forEach((clazz, methodSet) -> {
-			if (clazz.isApplicableToBeanType(handlerType)) {
-				Object bean = clazz.resolveBean();
+		this.initBinderAdviceCache.forEach((controllerAdviceBean, methodSet) -> {
+			if (controllerAdviceBean.isApplicableToBeanType(handlerType)) {
+				Object bean = controllerAdviceBean.resolveBean();
 				for (Method method : methodSet) {
 					initBinderMethods.add(createInitBinderMethod(bean, method));
 				}