    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
    015    package 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     */
    025    public 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    }