be.atbash.util.AnnotationUtil Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of utils-se Show documentation

Some utilities only requiring Java SE for all the Atbash projects

The newest version!

/*
 * Copyright 2014-2020 Rudy De Busscher (https://www.atbash.be)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package be.atbash.util;

import be.atbash.util.reflection.ReflectionUtils;

import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.util.List;

@PublicAPI
public final class AnnotationUtil {

    private AnnotationUtil() {
    }

    public static  A getAnnotation(Class someClass, Class someAnnotation) {
        A result = null;
        if (someClass.isAnnotationPresent(someAnnotation)) {
            result = someClass.getAnnotation(someAnnotation);
        } else {
            if (someClass != Object.class) {
                result = getAnnotation(someClass.getSuperclass(), someAnnotation);
            }
        }
        return result;
    }

    public static List findAnnotatedFields(Class clazz, Class annotationType) {
        return ReflectionUtils.findFields(clazz, fld -> fld.isAnnotationPresent(annotationType));
    }

}