package com.qxueyou.scc.sys.utils;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

import java.util.Map;

@Component
public class SpringContextHolder implements ApplicationContextAware {

    /**
     * ÒÔ¾²Ì¬±äÁ¿±£´æApplicationContext,¿ÉÔÚÈÎÒâ´úÂëÖÐÈ¡³öApplicaitonContext.
     */
    private static ApplicationContext context;

    /**
     * ʵÏÖApplicationContextAware½Ó¿ÚµÄcontext×¢È뺯Êý, ½«Æä´æÈ뾲̬±äÁ¿.
     */

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringContextHolder.context = applicationContext;
    }

    /**
     * »ñÈ¡applicationContext
     * @return
     */
    public ApplicationContext getApplicationContext() {
        return context;
    }

    /**
     * ͨ¹ýname»ñÈ¡ Bean.
     * @param name
     * @return
     */
    public static Object getBean(String name){
        return context.getBean(name);
    }

    /**
     * ͨ¹ýclass»ñÈ¡Bean.
     * @param <T>
     * @param clazz
     * @return
     */
    public static <T> Map<String, T> getBeans(Class<T> clazz){
        return context.getBeansOfType(clazz);
    }

    /**
     * ͨ¹ýclass»ñÈ¡Bean.
     * @param clazz
     * @param <T>
     * @return
     */
    public static <T> T getBean(Class<T> clazz){
        return context.getBean(clazz);
    }

    /**
     * ͨ¹ýname,ÒÔ¼°Clazz·µ»ØÖ¸¶¨µÄBean
     * @param name
     * @param clazz
     * @param <T>
     * @return
     */
    public static <T> T getBean(String name, Class<T> clazz){
        return context.getBean(name, clazz);
    }
}