package com.zzsn.configuration;

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

import java.util.Map;


/**
* 获取Spring的ApplicationContext对象工具，可以用静态方法的方式获取spring容器中的bean
* @author https://blog.csdn.net/chen_2890
* @date 2019/6/26 16:20
*/
@Component
public class SpringContextUtil implements ApplicationContextAware {

   private static ApplicationContext applicationContext;

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

   /**
    * 获取applicationContext
    */
   public static ApplicationContext getApplicationContext() {
       return applicationContext;
   }

   /**
    * 通过name获取 Bean.
    */
   public static Object getBean(String name) {
       Object o = null;
       try {
           o = getApplicationContext().getBean(name);
       } catch (NoSuchBeanDefinitionException e) {
           // e.printStackTrace();
       }
       return o;
   }

   /**
    * 通过class获取Bean.
    */
   public static <T> T getBean(Class<T> clazz) {
       return getApplicationContext().getBean(clazz);
   }

   /**
    * 通过name,以及Clazz返回指定的Bean
    */
   public static <T> T getBean(String name, Class<T> clazz) {
       return getApplicationContext().getBean(name, clazz);
   }

   /**
    * 通过name获取 Bean.
    */
   public static <T> Map<String, T> getBeansOfType(Class<T> clazz) {
       return getApplicationContext().getBeansOfType(clazz);
   }

   /**
    * 获取配置文件配置项的值
    *
    * @param key 配置项key
    */
   public static String getEnvironmentProperty(String key) {
       return getApplicationContext().getEnvironment().getProperty(key);
   }

   /**
    * 获取spring.profiles.active
    */
   public static String getActiveProfile() {
       return getApplicationContext().getEnvironment().getActiveProfiles()[0];
   }
}
