场景3：实现代码重构

语言：JAVA
场景：重构代码，简化，添加中文注释，增强异常处理
代码：
@Override
public PlanFlowDto getLastTransport(String orderCode) {
List list = this.list(new LambdaQueryWrapper().eq(PlanFlow::getOrderCode, orderCode));
PlanFlowDto flowDto = new PlanFlowDto();
if (CollUtil.isNotEmpty(list)) {
PlanFlow planFlow = list.stream().filter(e -> e.getFlowOrder().equals(e.getFlowTotal())).findFirst().orElse(new PlanFlow());
flowDto = StreamlineCopyUtil.beanCopy(planFlow, PlanFlowDto.class);
}
return flowDto;
}