/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * 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.alibaba.druid.support.spring.stat.annotation;

import com.alibaba.druid.support.spring.stat.DruidStatInterceptor;
import org.aopalliance.aop.Advice;
import org.springframework.aop.Pointcut;
import org.springframework.aop.support.AbstractPointcutAdvisor;
import org.springframework.aop.support.ComposablePointcut;
import org.springframework.aop.support.annotation.AnnotationMatchingPointcut;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;

@SuppressWarnings("serial")
public class StatAnnotationAdvisor extends AbstractPointcutAdvisor implements BeanFactoryAware {
    private Advice advice;
    private Pointcut pointcut;
    private DruidStatInterceptor druidStatInterceptor;

    public StatAnnotationAdvisor(DruidStatInterceptor druidStatInterceptor) {
        this.druidStatInterceptor = druidStatInterceptor;
        this.advice = buildAdvice();
        this.pointcut = buildPointcut();
    }

    public Pointcut getPointcut() {
        return this.pointcut;
    }

    public Advice getAdvice() {
        return this.advice;
    }

    public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
        if (this.advice instanceof BeanFactoryAware) {
            ((BeanFactoryAware) this.advice).setBeanFactory(beanFactory);
        }
    }

    protected Advice buildAdvice() {
        return druidStatInterceptor;
    }

    protected Pointcut buildPointcut() {
        Pointcut cpc = new AnnotationMatchingPointcut(Stat.class, true);
        Pointcut mpc = AnnotationMatchingPointcut.forMethodAnnotation(Stat.class);

        ComposablePointcut result = new ComposablePointcut(cpc).union(mpc);

        return result;
    }

}
