ConstructorResolver exposes parameter signature from user-declared class (in case of a CGLIB-generated subclass)

Issue: SPR-14015

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

@@ -182,8 +182,8 @@ class ConstructorResolver {
 								paramNames = pnd.getParameterNames(candidate);
 							}
 						}
-						argsHolder = createArgumentArray(
-								beanName, mbd, resolvedValues, bw, paramTypes, paramNames, candidate, autowiring);
+						argsHolder = createArgumentArray(beanName, mbd, resolvedValues, bw, paramTypes, paramNames,
+								getUserDeclaredConstructor(candidate), autowiring);
 					}
 					catch (UnsatisfiedDependencyException ex) {
 						if (this.beanFactory.logger.isTraceEnabled()) {
@@ -446,8 +446,7 @@ class ConstructorResolver {
 
 			LinkedList<UnsatisfiedDependencyException> causes = null;
 
-			for (int i = 0; i < candidates.length; i++) {
-				Method candidate = candidates[i];
+			for (Method candidate : candidates) {
 				Class<?>[] paramTypes = candidate.getParameterTypes();
 
 				if (paramTypes.length >= minNrOfArgs) {
@@ -800,6 +799,21 @@ class ConstructorResolver {
 		return resolvedArgs;
 	}
 
+	protected Constructor<?> getUserDeclaredConstructor(Constructor<?> constructor) {
+		Class<?> declaringClass = constructor.getDeclaringClass();
+		Class<?> userClass = ClassUtils.getUserClass(declaringClass);
+		if (userClass != declaringClass) {
+			try {
+				return userClass.getDeclaredConstructor(constructor.getParameterTypes());
+			}
+			catch (NoSuchMethodException ex) {
+				// No equivalent constructor on user class (superclass)...
+				// Let's proceed with the given constructor as we usually would.
+			}
+		}
+		return constructor;
+	}
+
 	/**
 	 * Template method for resolving the specified argument which is supposed to be autowired.
 	 */

spring-context/src/test/java/org/springframework/context/annotation/configuration/AutowiredConfigurationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -26,6 +26,7 @@ import javax.inject.Provider;
 import org.junit.Test;
 
 import org.springframework.beans.factory.BeanFactory;
+import org.springframework.beans.factory.ObjectFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.beans.factory.support.DefaultListableBeanFactory;
@@ -103,6 +104,18 @@ public class AutowiredConfigurationTests {
 		assertSame(ctx.getBean(AutowiredConstructorConfig.class).colour, ctx.getBean(Colour.class));
 	}
 
+	@Test
+	public void testObjectFactoryConstructorWithTypeVariable() {
+		DefaultListableBeanFactory factory = new DefaultListableBeanFactory();
+		new XmlBeanDefinitionReader(factory).loadBeanDefinitions(
+				new ClassPathResource("annotation-config.xml", ObjectFactoryConstructorConfig.class));
+		GenericApplicationContext ctx = new GenericApplicationContext(factory);
+		ctx.registerBeanDefinition("config1", new RootBeanDefinition(ObjectFactoryConstructorConfig.class));
+		ctx.registerBeanDefinition("config2", new RootBeanDefinition(ColorConfig.class));
+		ctx.refresh();
+		assertSame(ctx.getBean(ObjectFactoryConstructorConfig.class).colour, ctx.getBean(Colour.class));
+	}
+
 	@Test
 	public void testAutowiredAnnotatedConstructorSupported() {
 		DefaultListableBeanFactory factory = new DefaultListableBeanFactory();
@@ -257,6 +270,18 @@ public class AutowiredConfigurationTests {
 	}
 
 
+	@Configuration
+	static class ObjectFactoryConstructorConfig {
+
+		Colour colour;
+
+		// @Autowired
+		ObjectFactoryConstructorConfig(ObjectFactory<Colour> colourFactory) {
+			this.colour = colourFactory.getObject();
+		}
+	}
+
+
 	@Configuration
 	static class MultipleConstructorConfig {