Use OptionalValidatorFactoryBean in Configurers

Configurers and BeanDefinitionParsers should use
OptionalValidatorFactoryBean instead of
LocalValidatorFactoryBean.

The Optional implementation catches and logs setup
exceptions, useful when a validation API is present on
the classpath but not the actual implementation.

Issue: SPR-11272

spring-messaging/src/main/java/org/springframework/messaging/simp/config/AbstractMessageBrokerConfiguration.java

@@ -305,7 +305,7 @@ public abstract class AbstractMessageBrokerConfiguration implements ApplicationC
 	 *   <li>delegating to getValidator() first</li>
 	 *   <li>if none returned, getting an existing instance with its well-known name "mvcValidator", created by an MVC configuration</li>
 	 *   <li>if none returned, checking the classpath for the presence of a JSR-303 implementation before creating a
-	 *   {@code LocalValidatorFactoryBean}</li>
+	 *   {@code OptionalValidatorFactoryBean}</li>
 	 *   <li>returning a no-op Validator instance</li>
 	 * </ul>
 	 */
@@ -318,7 +318,7 @@ public abstract class AbstractMessageBrokerConfiguration implements ApplicationC
 			else if (ClassUtils.isPresent("javax.validation.Validator", getClass().getClassLoader())) {
 				Class<?> clazz;
 				try {
-					String className = "org.springframework.validation.beanvalidation.LocalValidatorFactoryBean";
+					String className = "org.springframework.validation.beanvalidation.OptionalValidatorFactoryBean";
 					clazz = ClassUtils.forName(className, AbstractMessageBrokerConfiguration.class.getClassLoader());
 				}
 				catch (ClassNotFoundException e) {

spring-webmvc/src/main/java/org/springframework/web/servlet/config/AnnotationDrivenBeanDefinitionParser.java

 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2014 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.
@@ -48,7 +48,6 @@ import org.springframework.http.converter.xml.Jaxb2RootElementHttpMessageConvert
 import org.springframework.http.converter.xml.SourceHttpMessageConverter;
 import org.springframework.util.ClassUtils;
 import org.springframework.util.xml.DomUtils;
-import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;
 import org.springframework.web.HttpRequestHandler;
 import org.springframework.web.accept.ContentNegotiationManager;
 import org.springframework.web.accept.ContentNegotiationManagerFactoryBean;
@@ -116,8 +115,8 @@ import org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolv
  * <ul>
  * 	<li>A {@link ContentNegotiationManager}
  * 	<li>A {@link DefaultFormattingConversionService}
- * 	<li>A {@link LocalValidatorFactoryBean} if a JSR-303 implementation is
- * 	available on the classpath
+ * 	<li>A {@link org.springframework.validation.beanvalidation.LocalValidatorFactoryBean}
+ * 	if a JSR-303 implementation is available on the classpath
  * 	<li>A range of {@link HttpMessageConverter}s depending on what 3rd party
  * 	libraries are available on the classpath.
  * </ul>

spring-webmvc/src/main/java/org/springframework/web/servlet/config/annotation/WebMvcConfigurationSupport.java

 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2014 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.
@@ -52,7 +52,6 @@ import org.springframework.util.ClassUtils;
 import org.springframework.validation.Errors;
 import org.springframework.validation.MessageCodesResolver;
 import org.springframework.validation.Validator;
-import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;
 import org.springframework.web.HttpRequestHandler;
 import org.springframework.web.accept.ContentNegotiationManager;
 import org.springframework.web.bind.WebDataBinder;
@@ -129,8 +128,8 @@ import org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolv
  * <ul>
  * 	<li>A {@link ContentNegotiationManager}
  * 	<li>A {@link DefaultFormattingConversionService}
- * 	<li>A {@link LocalValidatorFactoryBean} if a JSR-303 implementation is
- * 	available on the classpath
+ * 	<li>A {@link org.springframework.validation.beanvalidation.OptionalValidatorFactoryBean}
+ * 	if a JSR-303 implementation is available on the classpath
  * 	<li>A range of {@link HttpMessageConverter}s depending on the 3rd party
  * 	libraries available on the classpath.
  * </ul>
@@ -410,7 +409,7 @@ public class WebMvcConfigurationSupport implements ApplicationContextAware, Serv
 	 * {@code @ModelAttribute} and {@code @RequestBody} method arguments.
 	 * Delegates to {@link #getValidator()} first and if that returns {@code null}
 	 * checks the classpath for the presence of a JSR-303 implementations
-	 * before creating a {@code LocalValidatorFactoryBean}.If a JSR-303
+	 * before creating a {@code OptionalValidatorFactoryBean}.If a JSR-303
 	 * implementation is not available, a no-op {@link Validator} is returned.
 	 */
 	@Bean
@@ -420,7 +419,7 @@ public class WebMvcConfigurationSupport implements ApplicationContextAware, Serv
 			if (ClassUtils.isPresent("javax.validation.Validator", getClass().getClassLoader())) {
 				Class<?> clazz;
 				try {
-					String className = "org.springframework.validation.beanvalidation.LocalValidatorFactoryBean";
+					String className = "org.springframework.validation.beanvalidation.OptionalValidatorFactoryBean";
 					clazz = ClassUtils.forName(className, WebMvcConfigurationSupport.class.getClassLoader());
 				}
 				catch (ClassNotFoundException e) {

spring-webmvc/src/main/java/org/springframework/web/servlet/config/annotation/WebMvcConfigurer.java

 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2014 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.
@@ -64,7 +64,7 @@ public interface WebMvcConfigurer {
 	/**
 	 * Provide a custom {@link Validator} instead of the one created by default.
 	 * The default implementation, assuming JSR-303 is on the classpath, is:
-	 * {@link org.springframework.validation.beanvalidation.LocalValidatorFactoryBean}.
+	 * {@link org.springframework.validation.beanvalidation.OptionalValidatorFactoryBean}.
 	 * Leave the return value as {@code null} to keep the default.
 	 */
 	Validator getValidator();