spring MethodBeforeAdviceInterceptor 源码
spring MethodBeforeAdviceInterceptor 代码
文件路径：/spring-aop/src/main/java/org/springframework/aop/framework/adapter/MethodBeforeAdviceInterceptor.java
/*
* Copyright 2002-2020 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.aop.framework.adapter;
import java.io.Serializable;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.springframework.aop.BeforeAdvice;
import org.springframework.aop.MethodBeforeAdvice;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
/**
* Interceptor to wrap a {@link MethodBeforeAdvice}.
* <p>Used internally by the AOP framework; application developers should not
* need to use this class directly.
*
* @author Rod Johnson
* @see AfterReturningAdviceInterceptor
* @see ThrowsAdviceInterceptor
*/
@SuppressWarnings("serial")
public class MethodBeforeAdviceInterceptor implements MethodInterceptor, BeforeAdvice, Serializable {
private final MethodBeforeAdvice advice;
/**
* Create a new MethodBeforeAdviceInterceptor for the given advice.
* @param advice the MethodBeforeAdvice to wrap
*/
public MethodBeforeAdviceInterceptor(MethodBeforeAdvice advice) {
Assert.notNull(advice, "Advice must not be null");
this.advice = advice;
}
@Override
@Nullable
public Object invoke(MethodInvocation mi) throws Throwable {
this.advice.before(mi.getMethod(), mi.getArguments(), mi.getThis());
return mi.proceed();
}
}
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