Minor internal refinements (backported from master)

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

@@ -645,7 +645,6 @@ public abstract class AbstractAutowireCapableBeanFactory extends AbstractBeanFac
 	@Nullable
 	protected Class<?> predictBeanType(String beanName, RootBeanDefinition mbd, Class<?>... typesToMatch) {
 		Class<?> targetType = determineTargetType(beanName, mbd, typesToMatch);
-
 		// Apply SmartInstantiationAwareBeanPostProcessors to predict the
 		// eventual type after a before-instantiation shortcut.
 		if (targetType != null && !mbd.isSynthetic() && hasInstantiationAwareBeanPostProcessors()) {
@@ -1364,34 +1363,28 @@ public abstract class AbstractAutowireCapableBeanFactory extends AbstractBeanFac
 		// Give any InstantiationAwareBeanPostProcessors the opportunity to modify the
 		// state of the bean before properties are set. This can be used, for example,
 		// to support styles of field injection.
-		boolean continueWithPropertyPopulation = true;
-
 		if (!mbd.isSynthetic() && hasInstantiationAwareBeanPostProcessors()) {
 			for (BeanPostProcessor bp : getBeanPostProcessors()) {
 				if (bp instanceof InstantiationAwareBeanPostProcessor) {
 					InstantiationAwareBeanPostProcessor ibp = (InstantiationAwareBeanPostProcessor) bp;
 					if (!ibp.postProcessAfterInstantiation(bw.getWrappedInstance(), beanName)) {
-						continueWithPropertyPopulation = false;
-						break;
+						return;
 					}
 				}
 			}
 		}
 
-		if (!continueWithPropertyPopulation) {
-			return;
-		}
-
 		PropertyValues pvs = (mbd.hasPropertyValues() ? mbd.getPropertyValues() : null);
 
-		if (mbd.getResolvedAutowireMode() == AUTOWIRE_BY_NAME || mbd.getResolvedAutowireMode() == AUTOWIRE_BY_TYPE) {
+		int resolvedAutowireMode = mbd.getResolvedAutowireMode();
+		if (resolvedAutowireMode == AUTOWIRE_BY_NAME || resolvedAutowireMode == AUTOWIRE_BY_TYPE) {
 			MutablePropertyValues newPvs = new MutablePropertyValues(pvs);
 			// Add property values based on autowire by name if applicable.
-			if (mbd.getResolvedAutowireMode() == AUTOWIRE_BY_NAME) {
+			if (resolvedAutowireMode == AUTOWIRE_BY_NAME) {
 				autowireByName(beanName, mbd, bw, newPvs);
 			}
 			// Add property values based on autowire by type if applicable.
-			if (mbd.getResolvedAutowireMode() == AUTOWIRE_BY_TYPE) {
+			if (resolvedAutowireMode == AUTOWIRE_BY_TYPE) {
 				autowireByType(beanName, mbd, bw, newPvs);
 			}
 			pvs = newPvs;
@@ -1495,7 +1488,7 @@ public abstract class AbstractAutowireCapableBeanFactory extends AbstractBeanFac
 				if (Object.class != pd.getPropertyType()) {
 					MethodParameter methodParam = BeanUtils.getWriteMethodParameter(pd);
 					// Do not allow eager init for type matching in case of a prioritized post-processor.
-					boolean eager = !PriorityOrdered.class.isInstance(bw.getWrappedInstance());
+					boolean eager = !(bw.getWrappedInstance() instanceof PriorityOrdered);
 					DependencyDescriptor desc = new AutowireByTypeDependencyDescriptor(methodParam, eager);
 					Object autowiredArgument = resolveDependency(desc, beanName, autowiredBeanNames, converter);
 					if (autowiredArgument != null) {

spring-context/src/main/java/org/springframework/context/support/ReloadableResourceBundleMessageSource.java

 /*
- * 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.
@@ -237,6 +237,7 @@ public class ReloadableResourceBundleMessageSource extends AbstractResourceBased
 		if (mergedHolder != null) {
 			return mergedHolder;
 		}
+
 		Properties mergedProps = newProperties();
 		long latestTimestamp = -1;
 		String[] basenames = StringUtils.toStringArray(getBasenameSet());
@@ -253,6 +254,7 @@ public class ReloadableResourceBundleMessageSource extends AbstractResourceBased
 				}
 			}
 		}
+
 		mergedHolder = new PropertiesHolder(mergedProps, latestTimestamp);
 		PropertiesHolder existing = this.cachedMergedProperties.putIfAbsent(locale, mergedHolder);
 		if (existing != null) {
@@ -279,18 +281,28 @@ public class ReloadableResourceBundleMessageSource extends AbstractResourceBased
 				return filenames;
 			}
 		}
+
+		// Filenames for given Locale
 		List<String> filenames = new ArrayList<>(7);
 		filenames.addAll(calculateFilenamesForLocale(basename, locale));
-		if (isFallbackToSystemLocale() && !locale.equals(Locale.getDefault())) {
-			List<String> fallbackFilenames = calculateFilenamesForLocale(basename, Locale.getDefault());
-			for (String fallbackFilename : fallbackFilenames) {
-				if (!filenames.contains(fallbackFilename)) {
-					// Entry for fallback locale that isn't already in filenames list.
-					filenames.add(fallbackFilename);
+
+		// Filenames for default Locale, if any
+		if (isFallbackToSystemLocale()) {
+			Locale defaultLocale = Locale.getDefault();
+			if (!locale.equals(defaultLocale)) {
+				List<String> fallbackFilenames = calculateFilenamesForLocale(basename, defaultLocale);
+				for (String fallbackFilename : fallbackFilenames) {
+					if (!filenames.contains(fallbackFilename)) {
+						// Entry for fallback locale that isn't already in filenames list.
+						filenames.add(fallbackFilename);
+					}
 				}
 			}
 		}
+
+		// Filename for default bundle file
 		filenames.add(basename);
+
 		if (localeMap == null) {
 			localeMap = new ConcurrentHashMap<>();
 			Map<Locale, List<String>> existing = this.cachedFilenames.putIfAbsent(basename, localeMap);

spring-context/src/test/java/org/springframework/context/event/AnnotationDrivenEventListenerTests.java

 /*
- * 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.
@@ -794,6 +794,7 @@ public class AnnotationDrivenEventListenerTests {
 
 		@EventListener
 		@Async
+		@Override
 		public void handleAsync(AnotherTestEvent event) {
 			assertTrue(!Thread.currentThread().getName().equals(event.content));
 			this.eventCollector.addEvent(this, event);
@@ -820,6 +821,7 @@ public class AnnotationDrivenEventListenerTests {
 
 		@EventListener
 		@Async
+		@Override
 		public void handleAsync(AnotherTestEvent event) {
 			assertTrue(!Thread.currentThread().getName().equals(event.content));
 			this.eventCollector.addEvent(this, event);
@@ -902,7 +904,6 @@ public class AnnotationDrivenEventListenerTests {
 	}
 
 
-
 	@EventListener
 	@Retention(RetentionPolicy.RUNTIME)
 	public @interface ConditionalEvent {
@@ -934,18 +935,20 @@ public class AnnotationDrivenEventListenerTests {
 			super.handle(event);
 		}
 
-		@Override
 		@EventListener(condition = "#payload.startsWith('OK')")
+		@Override
 		public void handleString(String payload) {
 			super.handleString(payload);
 		}
 
 		@ConditionalEvent("#root.event.timestamp > #p0")
+		@Override
 		public void handleTimestamp(Long timestamp) {
 			collectEvent(timestamp);
 		}
 
 		@ConditionalEvent("@conditionEvaluator.valid(#p0)")
+		@Override
 		public void handleRatio(Double ratio) {
 			collectEvent(ratio);
 		}

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/handler/EventSourceTransportHandler.java

 /*
- * 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.
@@ -30,7 +30,7 @@ import org.springframework.web.socket.sockjs.transport.TransportType;
 import org.springframework.web.socket.sockjs.transport.session.StreamingSockJsSession;
 
 /**
- * A TransportHandler for sending messages via Server-Sent events:
+ * A TransportHandler for sending messages via Server-Sent Events:
  * <a href="https://dev.w3.org/html5/eventsource/">https://dev.w3.org/html5/eventsource/</a>.
  *
  * @author Rossen Stoyanchev
@@ -50,7 +50,7 @@ public class EventSourceTransportHandler extends AbstractHttpSendingTransportHan
 
 	@Override
 	public boolean checkSessionType(SockJsSession session) {
-		return session instanceof EventSourceStreamingSockJsSession;
+		return (session instanceof EventSourceStreamingSockJsSession);
 	}
 
 	@Override
@@ -66,7 +66,7 @@ public class EventSourceTransportHandler extends AbstractHttpSendingTransportHan
 	}
 
 
-	private class EventSourceStreamingSockJsSession extends StreamingSockJsSession {
+	private static class EventSourceStreamingSockJsSession extends StreamingSockJsSession {
 
 		public EventSourceStreamingSockJsSession(String sessionId, SockJsServiceConfig config,
 				WebSocketHandler wsHandler, Map<String, Object> attributes) {
@@ -76,7 +76,7 @@ public class EventSourceTransportHandler extends AbstractHttpSendingTransportHan
 
 		@Override
 		protected byte[] getPrelude(ServerHttpRequest request) {
-			return new byte[] { '\r', '\n' };
+			return new byte[] {'\r', '\n'};
 		}
 	}
 

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/handler/HtmlFileTransportHandler.java

 /*
- * 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.
@@ -93,7 +93,7 @@ public class HtmlFileTransportHandler extends AbstractHttpSendingTransportHandle
 
 	@Override
 	public boolean checkSessionType(SockJsSession session) {
-		return session instanceof HtmlFileStreamingSockJsSession;
+		return (session instanceof HtmlFileStreamingSockJsSession);
 	}
 
 	@Override

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/handler/WebSocketTransportHandler.java

 /*
- * 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.
@@ -107,7 +107,7 @@ public class WebSocketTransportHandler extends AbstractTransportHandler
 
 	@Override
 	public boolean checkSessionType(SockJsSession session) {
-		return session instanceof WebSocketServerSockJsSession;
+		return (session instanceof WebSocketServerSockJsSession);
 	}
 
 	@Override

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/handler/XhrPollingTransportHandler.java

 /*
- * 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.
@@ -54,7 +54,7 @@ public class XhrPollingTransportHandler extends AbstractHttpSendingTransportHand
 
 	@Override
 	public boolean checkSessionType(SockJsSession session) {
-		return session instanceof PollingSockJsSession;
+		return (session instanceof PollingSockJsSession);
 	}
 
 	@Override

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/handler/XhrStreamingTransportHandler.java

 /*
- * 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.
@@ -17,6 +17,7 @@
 package org.springframework.web.socket.sockjs.transport.handler;
 
 import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
 import java.util.Map;
 
 import org.springframework.http.MediaType;
@@ -41,9 +42,7 @@ public class XhrStreamingTransportHandler extends AbstractHttpSendingTransportHa
 	private static final byte[] PRELUDE = new byte[2049];
 
 	static {
-		for (int i = 0; i < 2048; i++) {
-			PRELUDE[i] = 'h';
-		}
+		Arrays.fill(PRELUDE, (byte) 'h');
 		PRELUDE[2048] = '\n';
 	}
 
@@ -60,7 +59,7 @@ public class XhrStreamingTransportHandler extends AbstractHttpSendingTransportHa
 
 	@Override
 	public boolean checkSessionType(SockJsSession session) {
-		return session instanceof XhrStreamingSockJsSession;
+		return (session instanceof XhrStreamingSockJsSession);
 	}
 
 	@Override