Account for the fact that validatedBy can now be null in the AP

since it has a default value of {}

Signed-off-by: marko-bekhta <[email protected]>

Author: marko-bekhta

annotation-processor/src/main/java/org/hibernate/validator/ap/internal/checks/ConstraintValidatorCheck.java

@@ -5,9 +5,11 @@
 package org.hibernate.validator.ap.internal.checks;
 
 import java.util.Collections;
+import java.util.List;
 import java.util.Set;
 
 import javax.lang.model.element.AnnotationMirror;
+import javax.lang.model.element.AnnotationValue;
 import javax.lang.model.element.TypeElement;
 
 import org.hibernate.validator.ap.internal.util.AnnotationApiHelper;
@@ -39,9 +41,10 @@ public Set<ConstraintCheckIssue> checkAnnotationType(TypeElement element, Annota
 		AnnotationMirror constraintMirror = annotationApiHelper.getMirror(
 				element.getAnnotationMirrors(), BeanValidationTypes.CONSTRAINT
 		);
-		boolean atLeastOneValidatorGiven = !annotationApiHelper.getAnnotationArrayValue(
+		List<? extends AnnotationValue> validatedBy = annotationApiHelper.getAnnotationArrayValue(
 				constraintMirror, "validatedBy"
-		).isEmpty();
+		);
+		boolean atLeastOneValidatorGiven = validatedBy != null && !validatedBy.isEmpty();
 
 		if ( !( atLeastOneValidatorGiven || constraintHelper.isComposedConstraint( element ) ) ) {
 

annotation-processor/src/main/java/org/hibernate/validator/ap/internal/util/ConstraintHelper.java

@@ -1013,6 +1013,10 @@ private List<? extends AnnotationValue> getValidatorClassesFromConstraintMetaAnn
 
 		AnnotationValue validatedBy = annotationApiHelper.getAnnotationValue( constraintMetaAnnotation, "validatedBy" );
 
+		if ( validatedBy == null ) {
+			return List.of();
+		}
+
 		return validatedBy.accept(
 				new SimpleAnnotationValueVisitor8<List<? extends AnnotationValue>, Void>() {