/*

  * 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.authz.aop;

 import java.lang.annotation.Annotation;

 import org.apache.shiro.authz.UnauthenticatedException;

 import org.apache.shiro.authz.annotation.RequiresAuthentication;

 /**

  * Handles {@link RequiresAuthentication RequiresAuthentication} annotations and ensures the calling subject is

  * authenticated before allowing access.

  *

  * @since 0.9.0

  */

 public class AuthenticatedAnnotationHandler extends AuthorizingAnnotationHandler {

     /**

      * Default no-argument constructor that ensures this handler to process

      * {@link org.apache.shiro.authz.annotation.RequiresAuthentication RequiresAuthentication} annotations.

      */

     public AuthenticatedAnnotationHandler() {

         super(RequiresAuthentication.class);

     }

     /**

      * Ensures that the calling <code>Subject</code> is authenticated, and if not, throws an

      * {@link org.apache.shiro.authz.UnauthenticatedException UnauthenticatedException} indicating the method is not allowed to be executed.

      *

      * @param a the annotation to inspect

      * @throws org.apache.shiro.authz.UnauthenticatedException if the calling <code>Subject</code> has not yet

      * authenticated.

      */

     public void assertAuthorized(Annotation a) throws UnauthenticatedException {

         if (a instanceof RequiresAuthentication && !getSubject().isAuthenticated() ) {

             throw new UnauthenticatedException( "The current Subject is not authenticated.  Access denied." );

         }

     }

 }