Prevent unnecessary refresh for InjectionMetadata.EMPTY

Closes gh-24485

spring-beans/src/main/java/org/springframework/beans/factory/annotation/InjectionMetadata.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+4 * 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.
@@ -53,6 +53,10 @@ public class InjectionMetadata {
 	 * @since 5.2
 	 */
 	public static final InjectionMetadata EMPTY = new InjectionMetadata(Object.class, Collections.emptyList()) {
+		@Override
+		protected boolean needsRefresh(Class<?> clazz) {
+			return false;
+		}
 		@Override
 		public void checkConfigMembers(RootBeanDefinition beanDefinition) {
 		}
@@ -89,6 +93,16 @@ public class InjectionMetadata {
 	}
 
 
+	/**
+	 * Determine whether this metadata instance needs to be refreshed.
+	 * @param clazz the current target class
+	 * @return {@code true} indicating a refresh, {@code false} otherwise
+	 * @since 5.2.4
+	 */
+	protected boolean needsRefresh(Class<?> clazz) {
+		return this.targetClass != clazz;
+	}
+
 	public void checkConfigMembers(RootBeanDefinition beanDefinition) {
 		Set<InjectedElement> checkedElements = new LinkedHashSet<>(this.injectedElements.size());
 		for (InjectedElement element : this.injectedElements) {
@@ -153,7 +167,7 @@ public class InjectionMetadata {
 	 * @return {@code true} indicating a refresh, {@code false} otherwise
 	 */
 	public static boolean needsRefresh(@Nullable InjectionMetadata metadata, Class<?> clazz) {
-		return (metadata == null || metadata.targetClass != clazz);
+		return (metadata == null || metadata.needsRefresh(clazz));
 	}