/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you 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 org.apache.shiro.aop;

 import java.lang.annotation.Annotation;

 /**

  * Defines an AOP-framework-independent way of determining if an Annotation exists on a Method.

  *

  * @since 1.1

  */

 public interface AnnotationResolver {

     /**

      * Returns an {@link Annotation} instance of the specified type based on the given

      * {@link MethodInvocation MethodInvocation} argument, or {@code null} if no annotation

      * of that type could be found. First checks the invoked method itself and if not found, 

      * then the class for the existence of the same annotation. 

      *

      * @param mi the intercepted method to be invoked.

      * @param clazz the annotation class of the annotation to find.

      * @return the method's annotation of the specified type or {@code null} if no annotation of

      *         that type could be found.

      */

     Annotation getAnnotation(MethodInvocation mi, Class<? extends Annotation> clazz);

 }