1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.shiro.aop;
20
21 /**
22 * A <tt>MethodInterceptor</tt> intercepts a <tt>MethodInvocation</tt> to perform before or after logic (aka 'advice').
23 *
24 * <p>Shiro's implementations of this interface mostly have to deal with ensuring a current Subject has the
25 * ability to execute the method before allowing it to continue.
26 *
27 * @since 0.2
28 */
29 public interface MethodInterceptor {
30
31 /**
32 * Invokes the specified <code>MethodInvocation</code>, allowing implementations to perform pre/post/finally
33 * surrounding the actual invocation.
34 *
35 * @param methodInvocation the <code>MethodInvocation</code> to execute.
36 * @return the result of the invocation
37 * @throws Throwable if the method invocation throws a Throwable or if an error occurs in pre/post/finally advice.
38 */
39 Object invoke(MethodInvocation methodInvocation) throws Throwable;
40
41 }