find annotation recursively

AnnotationExtUtils.java

package com.demo.util;

import lombok.NonNull;
import lombok.experimental.UtilityClass;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.lang.Nullable;

import java.lang.annotation.Annotation;
import java.lang.reflect.Method;

@UtilityClass
public class AnnotationExtUtils {

    final static int DEFAULT_DEPTH = 10;

    @Nullable
    public static <A extends Annotation> A findAnnotationRecursively(Method method, Class<A> annotationType) {
        return findAnnotationRecursively(method, annotationType, DEFAULT_DEPTH);
    }

    @Nullable
    public static <A extends Annotation> A findAnnotationRecursively(Method method, @NonNull Class<A> annotationType, int depth) {
        if (method == null) return null;
        depth--;
        A annotation = AnnotationUtils.getAnnotation(method, annotationType);
        if (annotation == null) {
            return findAnnotationRecursively(method.getDeclaringClass(), annotationType, depth);
        }
        return annotation;
    }

    @Nullable
    public static <A extends Annotation> A findAnnotationRecursively(Class<?> classZ, Class<A> annotationType) {
        return findAnnotationRecursively(classZ, annotationType, DEFAULT_DEPTH);
    }

    @Nullable
    public static <A extends Annotation> A findAnnotationRecursively(Class<?> classZ,
                                                                     @NonNull Class<A> annotationType, int depth) {
        if (classZ == null || depth <= 0 || classZ == Object.class) return null;
        depth--;
        A annotation = AnnotationUtils.getAnnotation(classZ, annotationType);
        if (annotation == null) {
            return findAnnotationRecursively(classZ.getSuperclass(), annotationType, depth);
        }
        return annotation;
    }

}