001/* 002 * Copyright 2002-2018 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 019import java.lang.reflect.Method; 020 021import org.springframework.lang.Nullable; 022 023/** 024 * Advice invoked before a method is invoked. Such advices cannot 025 * prevent the method call proceeding, unless they throw a Throwable. 026 * 027 * @author Rod Johnson 028 * @see AfterReturningAdvice 029 * @see ThrowsAdvice 030 */ 031public interface MethodBeforeAdvice extends BeforeAdvice { 032 033 /** 034 * Callback before a given method is invoked. 035 * @param method the method being invoked 036 * @param args the arguments to the method 037 * @param target the target of the method invocation. May be {@code null}. 038 * @throws Throwable if this object wishes to abort the call. 039 * Any exception thrown will be returned to the caller if it's 040 * allowed by the method signature. Otherwise the exception 041 * will be wrapped as a runtime exception. 042 */ 043 void before(Method method, Object[] args, @Nullable Object target) throws Throwable; 044 045}