/**
 * The MIT License (MIT) * Copyright (c) 2020 铭软科技(mingsoft.net)

 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package net.mingsoft.basic.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;

/**
 * @ClassName: SpringUtil
 * @Description: TODO(Spring工具类)
 * @author 铭飞开源团队
 * @date 2020年7月2日
 *
 */
@Component
public class SpringUtil implements ApplicationContextAware {

	private static ApplicationContext applicationContext;

	private static ThreadLocal<HttpServletRequest> requestThreadLocal=new ThreadLocal<>();
	/**
	 * 获取当前请求对象
	 *
	 * @return
	 */
	public static HttpServletRequest getRequest() {
		try {
			HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
			return request;
		} catch (Exception e) {
			return requestThreadLocal.get();
		}
	}
	/**
	 * 设置当前请求对象
	 *
	 * @return
	 */
	public static void setRequest(HttpServletRequest request) {
		requestThreadLocal.set(request);
	}

	/**
	 * 通过spring的webapplicationcontext上下文对象读取bean对象
	 *
	 * @param sc
	 *            上下文servletConext对象
	 * @param beanName
	 *            要读取的bean的名称
	 * @return 返回获取到的对象。获取不到返回null
	 */
	@Deprecated
	public static Object getBean(ServletContext sc, String beanName) {
		return getApplicationContext().getBean(beanName);
	}

	/**
	 * 通过spring的webapplicationcontext上下文对象读取bean对象
	 *
	 * @param beanName
	 *            要读取的bean的名称
	 * @return 返回获取到的对象。获取不到返回null
	 */
	public static Object getBean(String beanName) {
		return getApplicationContext().getBean(beanName);
	}

	/**
	 * 通过spring的webapplicationcontext上下文对象读取bean对象
	 *
	 * @param cls
	 *            要读取的类名称
	 * @return 返回获取到的对象。获取不到返回null
	 */
	public static <T> T getBean(Class<T> cls) {
		return getApplicationContext().getBean(cls);
	}



	@Override
	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		if (SpringUtil.applicationContext == null) {
			SpringUtil.applicationContext = applicationContext;
		}
	}
	//获取applicationContext
	public static ApplicationContext getApplicationContext() {
		return applicationContext;
	}
}