MethodValidationInterceptor excludes FactoryBean metadata methods

Issue: SPR-17374

spring-context/src/main/java/org/springframework/validation/beanvalidation/MethodValidationInterceptor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -28,6 +28,8 @@ import javax.validation.executable.ExecutableValidator;
 import org.aopalliance.intercept.MethodInterceptor;
 import org.aopalliance.intercept.MethodInvocation;
 
+import org.springframework.beans.factory.FactoryBean;
+import org.springframework.beans.factory.SmartFactoryBean;
 import org.springframework.core.BridgeMethodResolver;
 import org.springframework.core.annotation.AnnotationUtils;
 import org.springframework.util.ClassUtils;
@@ -86,6 +88,11 @@ public class MethodValidationInterceptor implements MethodInterceptor {
 	@Override
 	@SuppressWarnings("unchecked")
 	public Object invoke(MethodInvocation invocation) throws Throwable {
+		// Avoid Validator invocation on FactoryBean.getObjectType/isSingleton
+		if (isFactoryBeanMetadataMethod(invocation.getMethod())) {
+			return invocation.proceed();
+		}
+
 		Class<?>[] groups = determineValidationGroups(invocation);
 
 		// Standard Bean Validation 1.1 API
@@ -119,6 +126,12 @@ public class MethodValidationInterceptor implements MethodInterceptor {
 		return returnValue;
 	}
 
+	private boolean isFactoryBeanMetadataMethod(Method method) {
+		Class<?> clazz = method.getDeclaringClass();
+		return ((clazz == FactoryBean.class || clazz == SmartFactoryBean.class) &&
+				!method.getName().equals("getObject"));
+	}
+
 	/**
 	 * Determine the validation groups to validate against for the given method invocation.
 	 * <p>Default are the validation groups as specified in the {@link Validated} annotation