Regular getBeanInfo call for interfaces (enabling Introspector's cache)

Issue: SPR-16568

Author: jhoeller

spring-beans/src/main/java/org/springframework/beans/CachedIntrospectionResults.java

@@ -247,20 +247,17 @@ private static boolean isUnderneathClassLoader(@Nullable ClassLoader candidate,
 	/**
 	 * Retrieve a {@link BeanInfo} descriptor for the given target class.
 	 * @param beanClass the target class to introspect
-	 * @param ignoreBeaninfoClasses whether to apply {@link Introspector#IGNORE_ALL_BEANINFO} mode
 	 * @return the resulting {@code BeanInfo} descriptor (never {@code null})
 	 * @throws IntrospectionException from the underlying {@link Introspector}
 	 */
-	private static BeanInfo getBeanInfo(Class<?> beanClass, boolean ignoreBeaninfoClasses)
-			throws IntrospectionException {
-
+	private static BeanInfo getBeanInfo(Class<?> beanClass) throws IntrospectionException {
 		for (BeanInfoFactory beanInfoFactory : beanInfoFactories) {
 			BeanInfo beanInfo = beanInfoFactory.getBeanInfo(beanClass);
 			if (beanInfo != null) {
 				return beanInfo;
 			}
 		}
-		return (ignoreBeaninfoClasses ?
+		return (shouldIntrospectorIgnoreBeaninfoClasses ?
 				Introspector.getBeanInfo(beanClass, Introspector.IGNORE_ALL_BEANINFO) :
 				Introspector.getBeanInfo(beanClass));
 	}
@@ -286,7 +283,7 @@ private CachedIntrospectionResults(Class<?> beanClass) throws BeansException {
 			if (logger.isTraceEnabled()) {
 				logger.trace("Getting BeanInfo for class [" + beanClass.getName() + "]");
 			}
-			this.beanInfo = getBeanInfo(beanClass, shouldIntrospectorIgnoreBeaninfoClasses);
+			this.beanInfo = getBeanInfo(beanClass);
 
 			if (logger.isTraceEnabled()) {
 				logger.trace("Caching PropertyDescriptors for class [" + beanClass.getName() + "]");
@@ -318,9 +315,7 @@ private CachedIntrospectionResults(Class<?> beanClass) throws BeansException {
 				Class<?>[] ifcs = clazz.getInterfaces();
 				for (Class<?> ifc : ifcs) {
 					if (!ClassUtils.isJavaLanguageInterface(ifc)) {
-						BeanInfo ifcInfo = getBeanInfo(ifc, true);
-						PropertyDescriptor[] ifcPds = ifcInfo.getPropertyDescriptors();
-						for (PropertyDescriptor pd : ifcPds) {
+						for (PropertyDescriptor pd : getBeanInfo(ifc).getPropertyDescriptors()) {
 							if (!this.propertyDescriptorCache.containsKey(pd.getName())) {
 								pd = buildGenericTypeAwarePropertyDescriptor(beanClass, pd);
 								this.propertyDescriptorCache.put(pd.getName(), pd);