Polishing

(cherry picked from commit 925fa02)

spring-beans/src/main/java/org/springframework/beans/AbstractNestablePropertyAccessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -1004,18 +1004,20 @@ public String toString() {
 	 */
 	protected abstract static class PropertyHandler {
 
+		@Nullable
 		private final Class<?> propertyType;
 
 		private final boolean readable;
 
 		private final boolean writable;
 
-		public PropertyHandler(Class<?> propertyType, boolean readable, boolean writable) {
+		public PropertyHandler(@Nullable Class<?> propertyType, boolean readable, boolean writable) {
 			this.propertyType = propertyType;
 			this.readable = readable;
 			this.writable = writable;
 		}
 
+		@Nullable
 		public Class<?> getPropertyType() {
 			return this.propertyType;
 		}

spring-beans/src/main/java/org/springframework/beans/DirectFieldAccessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -129,7 +129,6 @@ public Object getValue() throws Exception {
 				ReflectionUtils.makeAccessible(this.field);
 				return this.field.get(getWrappedInstance());
 			}
-
 			catch (IllegalAccessException ex) {
 				throw new InvalidPropertyException(getWrappedClass(),
 						this.field.getName(), "Field is not accessible", ex);

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -36,6 +36,10 @@ protected ResolvableType getGenericApplicationEventType(String fieldName) {
 		}
 	}
 
+	protected <T> GenericTestEvent<T> createGenericTestEvent(T payload) {
+		return new GenericTestEvent<>(this, payload);
+	}
+
 
 	protected static class GenericTestEvent<T> extends ApplicationEvent {
 
@@ -51,6 +55,7 @@ public T getPayload() {
 		}
 	}
 
+
 	protected static class SmartGenericTestEvent<T> extends GenericTestEvent<T> implements ResolvableTypeProvider {
 
 		private final ResolvableType resolvableType;
@@ -67,52 +72,55 @@ public ResolvableType getResolvableType() {
 		}
 	}
 
+
 	protected static class StringEvent extends GenericTestEvent<String> {
 
 		public StringEvent(Object source, String payload) {
 			super(source, payload);
 		}
 	}
 
+
 	protected static class LongEvent extends GenericTestEvent<Long> {
 
 		public LongEvent(Object source, Long payload) {
 			super(source, payload);
 		}
 	}
 
-	protected <T> GenericTestEvent<T> createGenericTestEvent(T payload) {
-		return new GenericTestEvent<>(this, payload);
-	}
-
 
 	static class GenericEventListener implements ApplicationListener<GenericTestEvent<?>> {
+
 		@Override
 		public void onApplicationEvent(GenericTestEvent<?> event) {
 		}
 	}
 
+
 	static class ObjectEventListener implements ApplicationListener<GenericTestEvent<Object>> {
+
 		@Override
 		public void onApplicationEvent(GenericTestEvent<Object> event) {
 		}
 	}
 
-	static class UpperBoundEventListener
-			implements ApplicationListener<GenericTestEvent<? extends RuntimeException>> {
+
+	static class UpperBoundEventListener implements ApplicationListener<GenericTestEvent<? extends RuntimeException>> {
 
 		@Override
 		public void onApplicationEvent(GenericTestEvent<? extends RuntimeException> event) {
 		}
 	}
 
+
 	static class StringEventListener implements ApplicationListener<GenericTestEvent<String>> {
 
 		@Override
 		public void onApplicationEvent(GenericTestEvent<String> event) {
 		}
 	}
 
+
 	@SuppressWarnings("rawtypes")
 	static class RawApplicationListener implements ApplicationListener {
 
@@ -121,10 +129,10 @@ public void onApplicationEvent(ApplicationEvent event) {
 		}
 	}
 
+
 	static class TestEvents {
 
 		public GenericTestEvent<?> wildcardEvent;
-
 	}
 
 }

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -104,7 +104,8 @@ public void genericListenerStrictTypeNotMatchTypeErasure() {
 
 	@Test
 	public void genericListenerStrictTypeSubClass() {
-		supportsEventType(false, ObjectEventListener.class, ResolvableType.forClassWithGenerics(GenericTestEvent.class, Long.class));
+		supportsEventType(false, ObjectEventListener.class,
+				ResolvableType.forClassWithGenerics(GenericTestEvent.class, Long.class));
 	}
 
 	@Test