MethodValidationInterceptor excludes FactoryBean metadata methods

Issue: SPR-17374

Author: jhoeller

Diff for: spring-context-support/src/test/java/org/springframework/validation/beanvalidation2/MethodValidationTests.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.
@@ -27,6 +27,7 @@
 
 import org.springframework.aop.framework.ProxyFactory;
 import org.springframework.beans.MutablePropertyValues;
+import org.springframework.beans.factory.FactoryBean;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -122,8 +123,8 @@ private void doTestProxyValidation(MyValidInterface proxy) {
 	@Test
 	public void testLazyValidatorForMethodValidation() {
 		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(
-				LazyMethodValidationConfig.class, CustomValidatorBean.class, MyValidBean.class);
-		ctx.getBean(MyValidInterface.class).myValidMethod("value", 5);
+				LazyMethodValidationConfig.class, CustomValidatorBean.class, MyValidBean.class, MyValidFactoryBean.class);
+		ctx.getBeansOfType(MyValidInterface.class).values().forEach(bean -> bean.myValidMethod("value", 5));
 	}
 
 
@@ -146,6 +147,35 @@ public String myGenericMethod(String value) {
 	}
 
 
+	@MyStereotype
+	public static class MyValidFactoryBean implements FactoryBean<String>, MyValidInterface<String> {
+
+		@Override
+		public String getObject() {
+			return null;
+		}
+
+		@Override
+		public Class<?> getObjectType() {
+			return String.class;
+		}
+
+		@Override
+		public Object myValidMethod(String arg1, int arg2) {
+			return (arg2 == 0 ? null : "value");
+		}
+
+		@Override
+		public void myValidAsyncMethod(String arg1, int arg2) {
+		}
+
+		@Override
+		public String myGenericMethod(String value) {
+			return value;
+		}
+	}
+
+
 	public interface MyValidInterface<T> {
 
 		@NotNull Object myValidMethod(@NotNull(groups = MyGroup.class) String arg1, @Max(10) int arg2);

Diff for: 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 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 MethodValidationInterceptor(Validator validator) {
 	@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 Object invoke(MethodInvocation invocation) throws Throwable {
 		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

Diff for: spring-context/src/test/java/org/springframework/validation/beanvalidation/MethodValidationTests.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.
@@ -27,6 +27,7 @@
 
 import org.springframework.aop.framework.ProxyFactory;
 import org.springframework.beans.MutablePropertyValues;
+import org.springframework.beans.factory.FactoryBean;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -119,8 +120,8 @@ private void doTestProxyValidation(MyValidInterface proxy) {
 	@Test
 	public void testLazyValidatorForMethodValidation() {
 		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(
-				LazyMethodValidationConfig.class, CustomValidatorBean.class, MyValidBean.class);
-		ctx.getBean(MyValidInterface.class).myValidMethod("value", 5);
+				LazyMethodValidationConfig.class, CustomValidatorBean.class, MyValidBean.class, MyValidFactoryBean.class);
+		ctx.getBeansOfType(MyValidInterface.class).values().forEach(bean -> bean.myValidMethod("value", 5));
 	}
 
 
@@ -143,6 +144,35 @@ public String myGenericMethod(String value) {
 	}
 
 
+	@MyStereotype
+	public static class MyValidFactoryBean implements FactoryBean<String>, MyValidInterface<String> {
+
+		@Override
+		public String getObject() {
+			return null;
+		}
+
+		@Override
+		public Class<?> getObjectType() {
+			return String.class;
+		}
+
+		@Override
+		public Object myValidMethod(String arg1, int arg2) {
+			return (arg2 == 0 ? null : "value");
+		}
+
+		@Override
+		public void myValidAsyncMethod(String arg1, int arg2) {
+		}
+
+		@Override
+		public String myGenericMethod(String value) {
+			return value;
+		}
+	}
+
+
 	public interface MyValidInterface<T> {
 
 		@NotNull Object myValidMethod(@NotNull(groups = MyGroup.class) String arg1, @Max(10) int arg2);