public class UserContext {
	//本地线程变量
    private static final ThreadLocal<Holder> holder = ThreadLocal.withInitial(Holder::new);
	//正则匹配资源路径
    private static final Pattern RESOURCE_URI_PATTERN = Pattern.compile("^/api/resource/.+$");

	@Data
    public static class Holder {
        private User user;
    }
    
    /**
     * 设置当前用户
     *
     * @param user
     */
    public static void setCurrentUser(User user) {
        Holder holder = UserContext.holder.get();
        holder.setUser(user);
    }

    /**
     * 获取当前用户
     *
     * @return
     */
    public static User getCurrentUser() {
        return holder.get().getUser();
    }

    /**
     * 判断当前用户的权限是否允许该资源
     *
     * @param authorityEnum 权限枚举
     * @return
     */
    public static boolean permission(AuthorityEnum authorityEnum) {
     	//检索对象是否为空
        Objects.requireNonNull(authorityEnum, "权限枚举不能为null");
        User user = holder.get().getUser();
        return user.getAuthority() == authorityEnum.getAuthority();
    }

    public static boolean permission() {
        User user = holder.get().getUser();
        return !Objects.equals(user.getAuthority(), AuthorityEnum.GENERAL_USER.getAuthority());
    }

    public static void clear() {
    	//删除对应value对象
        holder.remove();
    }
}