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Provides Authentication/Authorization/Accounting service for Actframework based on osgl-aaa

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package act.aaa;

/*-
 * #%L
 * ACT AAA Plugin
 * %%
 * Copyright (C) 2015 - 2017 ActFramework
 * %%
 * 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.
 * #L%
 */

import org.osgl.util.E;

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

/*
 * Disclaim: the code is copied from SpringFramework AnnotationUtils
 */
public class AnnotationUtil {
    public static  A findAnnotation(Class clazz, Class annotationType) {
        E.NPE(clazz, "Class must not be null");
        A annotation = clazz.getAnnotation(annotationType);
        if (annotation != null) {
            return annotation;
        }
        for (Class ifc : clazz.getInterfaces()) {
            annotation = findAnnotation(ifc, annotationType);
            if (annotation != null) {
                return annotation;
            }
        }
        if (!Annotation.class.isAssignableFrom(clazz)) {
            for (Annotation ann : clazz.getAnnotations()) {
                annotation = findAnnotation(ann.annotationType(), annotationType);
                if (annotation != null) {
                    return annotation;
                }
            }
        }
        Class superClass = clazz.getSuperclass();
        if (superClass == null || superClass.equals(Object.class)) {
            return null;
        }
        return findAnnotation(superClass, annotationType);
    }

    public static  A findAnnotation(Method m, Class c) {
        return m.getAnnotation(c);
    }
}