RootBeanDefinition publicly exposes target type as ResolvableType

Issue: SPR-17028

Author: jhoeller

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

@@ -322,6 +322,19 @@ public Class<?> getTargetType() {
 		return (targetType != null ? targetType.resolve() : null);
 	}
 
+	/**
+	 * Return a {@link ResolvableType} for this bean definition,
+	 * either from runtime-cached type information or from configuration-time
+	 * {@link #setTargetType(ResolvableType)} or {@link #setBeanClass(Class)}.
+	 * @since 5.1
+	 * @see #getTargetType()
+	 * @see #getBeanClass()
+	 */
+	public ResolvableType getResolvableType() {
+		ResolvableType targetType = this.targetType;
+		return (targetType != null ? targetType : ResolvableType.forClass(getBeanClass()));
+	}
+
 	/**
 	 * Specify a factory method name that refers to a non-overloaded method.
 	 */

spring-beans/src/test/java/org/springframework/beans/factory/annotation/AutowiredAnnotationBeanPostProcessorTests.java

@@ -2363,6 +2363,7 @@ public void testGenericsBasedInjectionIntoMatchingTypeVariable() {
 		GenericInterface1Impl bean1 = (GenericInterface1Impl) bf.getBean("bean1");
 		GenericInterface2Impl bean2 = (GenericInterface2Impl) bf.getBean("bean2");
 		assertSame(bean2, bean1.gi2);
+		assertEquals(ResolvableType.forClass(GenericInterface1Impl.class), bd.getResolvableType());
 	}
 
 	@Test
@@ -2381,6 +2382,7 @@ public void testGenericsBasedInjectionIntoUnresolvedTypeVariable() {
 		GenericInterface1Impl bean1 = (GenericInterface1Impl) bf.getBean("bean1");
 		GenericInterface2Impl bean2 = (GenericInterface2Impl) bf.getBean("bean2");
 		assertSame(bean2, bean1.gi2);
+		assertEquals(ResolvableType.forClass(GenericInterface1Impl.class), bd.getResolvableType());
 	}
 
 	@Test
@@ -2401,7 +2403,6 @@ public void testGenericsBasedInjectionIntoTypeVariableSelectingBestMatch() {
 		GenericInterface1Impl bean1 = (GenericInterface1Impl) bf.getBean("bean1");
 		GenericInterface2Impl bean2 = (GenericInterface2Impl) bf.getBean("bean2");
 		assertSame(bean2, bean1.gi2);
-
 		assertArrayEquals(new String[] {"bean1"}, bf.getBeanNamesForType(ResolvableType.forClassWithGenerics(GenericInterface1.class, String.class)));
 		assertArrayEquals(new String[] {"bean2"}, bf.getBeanNamesForType(ResolvableType.forClassWithGenerics(GenericInterface2.class, String.class)));
 	}
@@ -2428,7 +2429,7 @@ public void testGenericsBasedInjectionIntoTypeVariableSelectingBestMatchAgainstF
 	}
 
 	@Test
-	public void testGenericsBasedInjectionWithBeanDefinitionTargetResolvableType() throws Exception {
+	public void testGenericsBasedInjectionWithBeanDefinitionTargetResolvableType() {
 		DefaultListableBeanFactory bf = new DefaultListableBeanFactory();
 		bf.setAutowireCandidateResolver(new QualifierAnnotationAutowireCandidateResolver());
 		AutowiredAnnotationBeanPostProcessor bpp = new AutowiredAnnotationBeanPostProcessor();
@@ -2443,6 +2444,8 @@ public void testGenericsBasedInjectionWithBeanDefinitionTargetResolvableType() t
 		bf.registerBeanDefinition("bean3", new RootBeanDefinition(MultiGenericFieldInjection.class));
 
 		assertEquals("bean1 a bean2 123", bf.getBean("bean3").toString());
+		assertEquals(ResolvableType.forClassWithGenerics(GenericInterface2Bean.class, String.class), bd1.getResolvableType());
+		assertEquals(ResolvableType.forClassWithGenerics(GenericInterface2Bean.class, Integer.class), bd2.getResolvableType());
 	}
 
 	@Test