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     */
019    package org.apache.shiro.aop;
020    
021    import org.apache.shiro.SecurityUtils;
022    import org.apache.shiro.subject.Subject;
023    
024    
025    /**
026     * This class is an abstraction of AOP method interceptor behavior specific to Shiro that
027     * leaves AOP implementation specifics to be handled by subclass implementations.  This implementation primarily
028     * enables a <tt>Log</tt> and makes available the currently executing {@link Subject Subject}.
029     *
030     * @author Les Hazlewood
031     * @since 0.2
032     */
033    public abstract class MethodInterceptorSupport implements MethodInterceptor {
034    
035        /**
036         * Default no-argument constructor for subclasses.
037         */
038        public MethodInterceptorSupport() {
039        }
040    
041        /**
042         * Returns the {@link Subject Subject} associated with the currently-executing code.
043         * <p/>
044         * This default implementation merely calls <code>{@link org.apache.shiro.SecurityUtils#getSubject SecurityUtils.getSubject()}</code>.
045         *
046         * @return the {@link org.apache.shiro.subject.Subject Subject} associated with the currently-executing code.
047         */
048        protected Subject getSubject() {
049            return SecurityUtils.getSubject();
050        }
051    }