001/*
002 * Copyright 2002-2012 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.aop;
018
019/**
020 * Superinterface for advisors that perform one or more AOP <b>introductions</b>.
021 *
022 * <p>This interface cannot be implemented directly; subinterfaces must
023 * provide the advice type implementing the introduction.
024 *
025 * <p>Introduction is the implementation of additional interfaces
026 * (not implemented by a target) via AOP advice.
027 *
028 * @author Rod Johnson
029 * @since 04.04.2003
030 * @see IntroductionInterceptor
031 */
032public interface IntroductionAdvisor extends Advisor, IntroductionInfo {
033
034        /**
035         * Return the filter determining which target classes this introduction
036         * should apply to.
037         * <p>This represents the class part of a pointcut. Note that method
038         * matching doesn't make sense to introductions.
039         * @return the class filter
040         */
041        ClassFilter getClassFilter();
042
043        /**
044         * Can the advised interfaces be implemented by the introduction advice?
045         * Invoked before adding an IntroductionAdvisor.
046         * @throws IllegalArgumentException if the advised interfaces can't be
047         * implemented by the introduction advice
048         */
049        void validateInterfaces() throws IllegalArgumentException;
050
051}