001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.tynamo.shiro.extension.authz.aop;
020
021import org.apache.shiro.authz.aop.AuthorizingAnnotationHandler;
022
023import java.lang.annotation.Annotation;
024
025
026/**
027 * Generic interceptor for use in different aop implementations.
028 * Created based on <b>method</b> annotation.
029 * <p/>
030 * To create the interceptor based on the class annotation, use
031 * {@link org.tynamo.shiro.extension.authz.annotations.utils.AnnotationFactory}
032 * for convert class annotation to method annotation.
033 *
034 */
035public class DefaultSecurityInterceptor implements SecurityInterceptor
036{
037
038        private final AuthorizingAnnotationHandler handler;
039        private final Annotation annotation;
040
041
042        /**
043         * Used in cases where previously known {@link org.apache.shiro.authz.aop.AuthorizingAnnotationHandler} object.
044         * <p/>
045         * if the handler object is unknown use {@link #DefaultSecurityInterceptor(Annotation)} constructor
046         *
047         * @param handler
048         * @param annotation
049         */
050        public DefaultSecurityInterceptor(AuthorizingAnnotationHandler handler, Annotation annotation)
051        {
052                this.handler = handler;
053                this.annotation = annotation;
054        }
055
056        /**
057         * Initialize {@link #handler} field use annotation.
058         *
059         * @param annotation annotation for create handler and use during
060         *                   {@link #intercept()} invocation.
061         */
062        public DefaultSecurityInterceptor(Annotation annotation)
063        {
064
065                this.annotation = annotation;
066                AuthorizingAnnotationHandler handler = AopHelper.createHandler(annotation);
067                if (handler == null)
068                {
069                        throw new IllegalStateException("No handler for " + annotation + "annotation");
070                }
071                this.handler = handler;
072
073        }
074
075        /* (non-Javadoc)
076                 * @see org.tynamo.shiro.extension.authz.aop.SecurityInterceptor#intercept()
077                 */
078
079        public void intercept()
080        {
081                handler.assertAuthorized(getAnnotation());
082        }
083
084        public Annotation getAnnotation()
085        {
086                return annotation;
087        }
088
089
090}