com.smallchill.core.aop.BeforeAop.java Source code

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Here is the source code for com.smallchill.core.aop.BeforeAop.java

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/**
 * Copyright (c) 2015-2016, Chill Zhuang  (smallchill@163.com).
 *
 * 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
 *
 *      http://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 com.smallchill.core.aop;

import java.lang.reflect.Method;

import javax.servlet.http.HttpServletRequest;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import com.smallchill.core.annotation.Before;
import com.smallchill.core.interfaces.Interceptor;

/**
 * before
 */
@Aspect
@Component
public class BeforeAop {

    @Pointcut(value = "@annotation(com.smallchill.core.annotation.Before)")
    private void cutBefore() {

    }

    @Around("cutBefore()")
    public Object doBefore(ProceedingJoinPoint point) throws Throwable {
        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes())
                .getRequest();
        MethodSignature ms = (MethodSignature) point.getSignature();
        Method method = ms.getMethod();
        Object[] args = point.getArgs();
        Class<?> clazz = point.getTarget().getClass();
        Before before = method.getAnnotation(Before.class);
        Interceptor ic = before.value().newInstance();
        Object result = ic.intercept(new Invocation(clazz, method, args, request));
        if (null == result) {
            return point.proceed();
        } else {
            return result;
        }
    }
}