Defensive error reporting when StandardAnnotationMetadata introspects declared methods

Issue: SPR-13791
(cherry picked from commit a36c0a5)

Author: jhoeller

spring-core/src/main/java/org/springframework/core/annotation/AnnotatedElementUtils.java

@@ -163,7 +163,7 @@ private static <T> T process(AnnotatedElement element, String annotationType, bo
 					new HashSet<AnnotatedElement>(), 0);
 		}
 		catch (Throwable ex) {
-			throw new IllegalStateException("Failed to introspect annotations: " + element, ex);
+			throw new IllegalStateException("Failed to introspect annotations on " + element, ex);
 		}
 	}
 

spring-core/src/main/java/org/springframework/core/type/StandardAnnotationMetadata.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -126,25 +126,35 @@ public MultiValueMap<String, Object> getAllAnnotationAttributes(String annotatio
 
 	@Override
 	public boolean hasAnnotatedMethods(String annotationType) {
-		Method[] methods = getIntrospectedClass().getDeclaredMethods();
-		for (Method method : methods) {
-			if (!method.isBridge() && AnnotatedElementUtils.isAnnotated(method, annotationType)) {
-				return true;
+		try {
+			Method[] methods = getIntrospectedClass().getDeclaredMethods();
+			for (Method method : methods) {
+				if (!method.isBridge() && AnnotatedElementUtils.isAnnotated(method, annotationType)) {
+					return true;
+				}
 			}
+			return false;
+		}
+		catch (Throwable ex) {
+			throw new IllegalStateException("Failed to introspect annotated methods on " + getIntrospectedClass(), ex);
 		}
-		return false;
 	}
 
 	@Override
 	public Set<MethodMetadata> getAnnotatedMethods(String annotationType) {
-		Method[] methods = getIntrospectedClass().getDeclaredMethods();
-		Set<MethodMetadata> annotatedMethods = new LinkedHashSet<MethodMetadata>();
-		for (Method method : methods) {
-			if (!method.isBridge() && AnnotatedElementUtils.isAnnotated(method, annotationType)) {
-				annotatedMethods.add(new StandardMethodMetadata(method, this.nestedAnnotationsAsMap));
+		try {
+			Method[] methods = getIntrospectedClass().getDeclaredMethods();
+			Set<MethodMetadata> annotatedMethods = new LinkedHashSet<MethodMetadata>();
+			for (Method method : methods) {
+				if (!method.isBridge() && AnnotatedElementUtils.isAnnotated(method, annotationType)) {
+					annotatedMethods.add(new StandardMethodMetadata(method, this.nestedAnnotationsAsMap));
+				}
 			}
+			return annotatedMethods;
+		}
+		catch (Throwable ex) {
+			throw new IllegalStateException("Failed to introspect annotated methods on " + getIntrospectedClass(), ex);
 		}
-		return annotatedMethods;
 	}
 
 }