Merge pull request #24525 from chenqimiao

* pr/24525:
  Polish "Reuse ResolvableType in getDependencyType"
  Reuse ResolvableType in getDependencyType

Closes gh-24525

spring-beans/src/main/java/org/springframework/beans/factory/config/DependencyDescriptor.java

@@ -21,8 +21,6 @@ import java.io.ObjectInputStream;
 import java.io.Serializable;
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Field;
-import java.lang.reflect.ParameterizedType;
-import java.lang.reflect.Type;
 import java.util.Map;
 import java.util.Optional;
 
@@ -365,23 +363,8 @@ public class DependencyDescriptor extends InjectionPoint implements Serializable
 	public Class<?> getDependencyType() {
 		if (this.field != null) {
 			if (this.nestingLevel > 1) {
-				Type type = this.field.getGenericType();
-				for (int i = 2; i <= this.nestingLevel; i++) {
-					if (type instanceof ParameterizedType) {
-						Type[] args = ((ParameterizedType) type).getActualTypeArguments();
-						type = args[args.length - 1];
-					}
-				}
-				if (type instanceof Class) {
-					return (Class<?>) type;
-				}
-				else if (type instanceof ParameterizedType) {
-					Type arg = ((ParameterizedType) type).getRawType();
-					if (arg instanceof Class) {
-						return (Class<?>) arg;
-					}
-				}
-				return Object.class;
+				Class<?> clazz = getResolvableType().getRawClass();
+				return (clazz != null ? clazz : Object.class);
 			}
 			else {
 				return this.field.getType();