001// Copyright 2008, 2011 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.tapestry5.ioc; 016 017/** 018 * For Tapestry IoC, Aspects provide a limited amount of advise, i.e., advising method invocations. That's the only join 019 * point available (method invocations of service interface methods); full AOP systems such as AspectJ can do much, much 020 * more, such as advising field access and even object construction. 021 * 022 * @see org.apache.tapestry5.ioc.services.AspectDecorator 023 * @deprecated Deprecated in 5.3, to be removed in 5.4. Use {@link org.apache.tapestry5.plastic.MethodAdvice}. 024 */ 025public interface MethodAdvice 026{ 027 /** 028 * Allows the Aspect to advise the invocation. The Aspect is free to inspect and even replace parameters. Most 029 * Aspects will then invoke {@link org.apache.tapestry5.ioc.Invocation#proceed()}. The Aspect may then inspect and 030 * replace any checked thrown exceptions. Some Aspects (for example, caching) may selectively decide to bypass the 031 * invocation entirely, and instead invoke some other method or otherwise set a return value or thrown exception. 032 * 033 * @param invocation 034 * to advise 035 */ 036 void advise(Invocation invocation); 037}