Polish BeanValidationBeanRegistrationAotProcessor[Tests]

The log message for a NoClassDefFoundError is now a DEBUG level message
handled like a TypeNotPresentException and similar to the following.

DEBUG: Skipping validation constraint hint inference for class
org.example.CustomConstraint due to a NoClassDefFoundError for
com.example.MissingType

See spring-projectsgh-33949

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

@@ -131,15 +131,21 @@ private static void processAheadOfTime(Class<?> clazz, Set<Class<?>> visitedClas
 				String className = clazz.getName();
 				if (KotlinDetector.isKotlinType(clazz) && ex instanceof ArrayIndexOutOfBoundsException) {
 					// See https://hibernate.atlassian.net/browse/HV-1796 and https://youtrack.jetbrains.com/issue/KT-40857
-					logger.warn("Skipping validation constraint hint inference for class " + className +
-							" due to an ArrayIndexOutOfBoundsException at validator level");
+					if (logger.isWarnEnabled()) {
+						logger.warn("Skipping validation constraint hint inference for class " + className +
+								" due to an ArrayIndexOutOfBoundsException at validator level");
+					}
 				}
-				else if (ex instanceof TypeNotPresentException) {
-					logger.debug("Skipping validation constraint hint inference for class " +
-							className + " due to a TypeNotPresentException at validator level: " + ex.getMessage());
+				else if (ex instanceof TypeNotPresentException || ex instanceof NoClassDefFoundError) {
+					if (logger.isDebugEnabled()) {
+						logger.debug("Skipping validation constraint hint inference for class %s due to a %s for %s"
+								.formatted(className, ex.getClass().getSimpleName(), ex.getMessage()));
+					}
 				}
 				else {
-					logger.warn("Skipping validation constraint hint inference for class " + className, ex);
+					if (logger.isWarnEnabled()) {
+						logger.warn("Skipping validation constraint hint inference for class " + className, ex);
+					}
 				}
 				return;
 			}

spring-context/src/test/java/org/springframework/validation/beanvalidation/BeanValidationBeanRegistrationAotProcessorTests.java

@@ -137,7 +137,7 @@ void shouldProcessRecursiveGenericsWithoutInfiniteRecursion(Class<?> beanClass)
 
 	@Test  // gh-33940
 	void shouldSkipConstraintWithMissingDependency() throws Exception {
-		FilteringClassLoader classLoader = new FilteringClassLoader(getClass().getClassLoader());
+		MissingDependencyClassLoader classLoader = new MissingDependencyClassLoader(getClass().getClassLoader());
 		Class<?> beanClass = classLoader.loadClass(ConstraintWithMissingDependency.class.getName());
 		process(beanClass);
 		assertThat(this.generationContext.getRuntimeHints().reflection().typeHints()).isEmpty();
@@ -280,14 +280,14 @@ static class BeanWithRecursiveOptional {
 
 	static class ConstraintWithMissingDependency {
 
-		private final Filtered filtered = new Filtered();
+		MissingType missingType;
 	}
 
-	static class Filtered {}
+	static class MissingType {}
 
-	static class FilteringClassLoader extends OverridingClassLoader {
+	static class MissingDependencyClassLoader extends OverridingClassLoader {
 
-		FilteringClassLoader(ClassLoader parent) {
+		MissingDependencyClassLoader(ClassLoader parent) {
 			super(parent);
 		}
 
@@ -298,7 +298,7 @@ protected boolean isEligibleForOverriding(String className) {
 
 		@Override
 		protected Class<?> loadClassForOverriding(String name) throws ClassNotFoundException {
-			if (name.contains("Filtered")) {
+			if (name.contains("MissingType")) {
 				throw new NoClassDefFoundError(name);
 			}
 			return super.loadClassForOverriding(name);