package com.sunyo.wlpt.message.builder.util;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * @ProjectName:
 * @Package: com.backstage.config
 * @ClassName: ApplicationContextProvider
 * @Description: 获取bean对象的工具类
 * @Author: wangzhilong
 * @CreateDate: 2018/8/31 13:26
 * @Version: 1.0
 */

/**
 * Author:ZhuShangJin
 * Date:2018/7/3
 */
@Component
public class SpringBeanUtitl implements ApplicationContextAware{

    private static ApplicationContext applicationContext = null;
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws
            BeansException {
        // TODO Auto-generated method stub
        SpringBeanUtitl.applicationContext = applicationContext;
    }

    /**
     * 从静态变量applicationContext中得到Bean, 自动转型为所赋值对象的类型.
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(String name) {
        if(name == null || applicationContext == null){
            return null;
        }

        return (T) applicationContext.getBean(name);
    }

    /**
     * 从静态变量applicationContext中得到Bean, 自动转型为所赋值对象的类型.
     */
    public static <T> T getBean(Class<T> clazz) {
        return applicationContext.getBean(clazz);
    }

}