Avoid decorated definition bypass for scoped proxy determination

GenericApplicationContext registers proxy hints without any SmartInstantiationAwareBeanPostProcessor involved as well.

Closes gh-29335

Author: jhoeller

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

@@ -689,33 +689,35 @@ public Class<?> getType(String name, boolean allowFactoryBeanInit) throws NoSuch
 		}
 
 		RootBeanDefinition mbd = getMergedLocalBeanDefinition(beanName);
-
-		// Check decorated bean definition, if any: We assume it'll be easier
-		// to determine the decorated bean's type than the proxy's type.
-		BeanDefinitionHolder dbd = mbd.getDecoratedDefinition();
-		if (dbd != null && !BeanFactoryUtils.isFactoryDereference(name)) {
-			RootBeanDefinition tbd = getMergedBeanDefinition(dbd.getBeanName(), dbd.getBeanDefinition(), mbd);
-			Class<?> targetClass = predictBeanType(dbd.getBeanName(), tbd);
-			if (targetClass != null && !FactoryBean.class.isAssignableFrom(targetClass)) {
-				return targetClass;
-			}
-		}
-
 		Class<?> beanClass = predictBeanType(beanName, mbd);
 
-		// Check bean class whether we're dealing with a FactoryBean.
-		if (beanClass != null && FactoryBean.class.isAssignableFrom(beanClass)) {
-			if (!BeanFactoryUtils.isFactoryDereference(name)) {
-				// If it's a FactoryBean, we want to look at what it creates, not at the factory class.
-				return getTypeForFactoryBean(beanName, mbd, allowFactoryBeanInit).resolve();
+		if (beanClass != null) {
+			// Check bean class whether we're dealing with a FactoryBean.
+			if (FactoryBean.class.isAssignableFrom(beanClass)) {
+				if (!BeanFactoryUtils.isFactoryDereference(name)) {
+					// If it's a FactoryBean, we want to look at what it creates, not at the factory class.
+					beanClass = getTypeForFactoryBean(beanName, mbd, allowFactoryBeanInit).resolve();
+				}
 			}
-			else {
-				return beanClass;
+			else if (BeanFactoryUtils.isFactoryDereference(name)) {
+				return null;
 			}
 		}
-		else {
-			return (!BeanFactoryUtils.isFactoryDereference(name) ? beanClass : null);
+
+		if (beanClass == null) {
+			// Check decorated bean definition, if any: We assume it'll be easier
+			// to determine the decorated bean's type than the proxy's type.
+			BeanDefinitionHolder dbd = mbd.getDecoratedDefinition();
+			if (dbd != null && !BeanFactoryUtils.isFactoryDereference(name)) {
+				RootBeanDefinition tbd = getMergedBeanDefinition(dbd.getBeanName(), dbd.getBeanDefinition(), mbd);
+				Class<?> targetClass = predictBeanType(dbd.getBeanName(), tbd);
+				if (targetClass != null && !FactoryBean.class.isAssignableFrom(targetClass)) {
+					return targetClass;
+				}
+			}
 		}
+
+		return beanClass;
 	}
 
 	@Override

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

@@ -439,29 +439,38 @@ private void preDetermineBeanTypes(RuntimeHints runtimeHints) {
 		List<SmartInstantiationAwareBeanPostProcessor> bpps =
 				PostProcessorRegistrationDelegate.loadBeanPostProcessors(
 						this.beanFactory, SmartInstantiationAwareBeanPostProcessor.class);
+
 		for (String beanName : this.beanFactory.getBeanDefinitionNames()) {
 			Class<?> beanType = this.beanFactory.getType(beanName);
 			if (beanType != null) {
+				registerProxyHintIfNecessary(beanType, runtimeHints);
 				for (SmartInstantiationAwareBeanPostProcessor bpp : bpps) {
-					beanType = bpp.determineBeanType(beanType, beanName);
-					if (Proxy.isProxyClass(beanType)) {
-						// A JDK proxy class needs an explicit hint
-						runtimeHints.proxies().registerJdkProxy(beanType.getInterfaces());
-					}
-					else {
-						// Potentially a CGLIB-generated subclass with reflection hints
-						Class<?> userClass = ClassUtils.getUserClass(beanType);
-						if (userClass != beanType) {
-							runtimeHints.reflection()
-									.registerType(beanType, asClassBasedProxy)
-									.registerType(userClass, asProxiedUserClass);
-						}
+					Class<?> newBeanType = bpp.determineBeanType(beanType, beanName);
+					if (newBeanType != beanType) {
+						registerProxyHintIfNecessary(newBeanType, runtimeHints);
+						beanType = newBeanType;
 					}
 				}
 			}
 		}
 	}
 
+	private void registerProxyHintIfNecessary(Class<?> beanType, RuntimeHints runtimeHints) {
+		if (Proxy.isProxyClass(beanType)) {
+			// A JDK proxy class needs an explicit hint
+			runtimeHints.proxies().registerJdkProxy(beanType.getInterfaces());
+		}
+		else {
+			// Potentially a CGLIB-generated subclass with reflection hints
+			Class<?> userClass = ClassUtils.getUserClass(beanType);
+			if (userClass != beanType) {
+				runtimeHints.reflection()
+						.registerType(beanType, asClassBasedProxy)
+						.registerType(userClass, asProxiedUserClass);
+			}
+		}
+	}
+
 
 	//---------------------------------------------------------------------
 	// Convenient methods for registering individual beans