/**
 * 实物订单处理
 */
public class InKindOrderDetailCommand implements OrderDetailService {
    @Override
    public Map<String, List<OrderDetailDto>> orderDetailProcess(List<OrderDetailDto> orderDetailList) {
        // 订单中的实物
        List<OrderDetailDto> resultList = orderDetailList.stream()
                // 筛选出实物
                .filter(item -> Objects.equals(1, item.getCommodityType()))
                .peek(item -> {
                    // 计算原价
                    item.setOriginalPrice(item.getCommodityUnitPrice().multiply(new BigDecimal(item.getCommodityQuantity())));
                    // 计算其他数据项目 ....
                }).collect(toList());
        return new HashMap<String, List<OrderDetailDto>>() {
            {
                put("inKind", resultList);
            }
        };
    }
}

public class VirtualItemOrderDetailCommand implements OrderDetailService {
    @Override
    public Map<String, List<OrderDetailDto>> orderDetailProcess(List<OrderDetailDto> orderDetailList) {
        return null;
    }
}

/**
 * 其他物品
 */
public class OtherOrderDetailCommand implements OrderDetailService {
    @Override
    public Map<String, List<OrderDetailDto>> orderDetailProcess(List<OrderDetailDto> orderDetailList) {
        return null;
    }
}

public class OrderDetailServices {
    public List<OrderDetailService> orderDetailServiceList = new ArrayList<>();
    /**
     * 初始化方法
     */
    public static OrderDetailServices create() {
        OrderDetailServices orderDetailServices = new OrderDetailServices();
        // 实物
        OrderDetailService inKindOrderDetail = new InKindOrderDetailCommand();
        // 虚拟物品
        OrderDetailService virtualItemOrderDetail = new VirtualItemOrderDetailCommand();
        // 赠送物品(优惠券、积分)
        OrderDetailService giveAwayOrderDetail = new GiveAwayOrderDetailCommand();
        // 其他
        OrderDetailService otherOrderDetail = new OtherOrderDetailCommand();
        orderDetailServices.orderDetailServiceList =
                Arrays.asList(inKindOrderDetail, virtualItemOrderDetail, giveAwayOrderDetail, otherOrderDetail);
        return orderDetailServices;
    }
    public Map<String, List<OrderDetailDto>> orderDetailProcess(List<OrderDetailDto> orderDetailList) {
        Map<String, List<OrderDetailDto>> resultMap = new HashMap<>();
        for (OrderDetailService item : orderDetailServiceList) {
            Map<String, List<OrderDetailDto>> tmpMap = item.orderDetailProcess(orderDetailList);
            if (tmpMap != null && !tmpMap.isEmpty()) {
                resultMap.putAll(tmpMap);
            }
        }
        return resultMap;
    }
}

public class OrderDetailServiceTest {
    public static void main(String[] args) {
        OrderDetailServices detailServices = OrderDetailServices.create();
        OrderDetailDto orderDetailDto = new OrderDetailDto();
        orderDetailDto.setOrderCode("CD00001");
        orderDetailDto.setCommodityType(1);
        orderDetailDto.setCommodityName("GTX 3080 TI");
        orderDetailDto.setCommodityUnitPrice(new BigDecimal("8999"));
        orderDetailDto.setCommodityQuantity(2);
        OrderDetailDto orderDetailDto2 = new OrderDetailDto();
        orderDetailDto2.setCommodityType(1);
        orderDetailDto2.setOrderCode("CD00002");
        orderDetailDto2.setCommodityName("LEI SHEN 茶轴 1088");
        orderDetailDto2.setCommodityUnitPrice(new BigDecimal("488"));
        orderDetailDto2.setCommodityQuantity(1);
        OrderDetailDto orderDetailDto3 = new OrderDetailDto();
        orderDetailDto3.setCommodityType(2);
        orderDetailDto3.setOrderCode("CJ00002");
        orderDetailDto3.setCommodityName("满 5000 减 200");
        orderDetailDto3.setCommodityUnitPrice(new BigDecimal("200"));
        orderDetailDto3.setCommodityQuantity(2);
        OrderDetailDto orderDetailDto4 = new OrderDetailDto();
        orderDetailDto4.setCommodityType(2);
        orderDetailDto4.setOrderCode("CJ00002");
        orderDetailDto4.setCommodityName("满 5000 减 100");
        orderDetailDto4.setCommodityUnitPrice(new BigDecimal("100"));
        orderDetailDto4.setCommodityQuantity(1);
        List<OrderDetailDto> detailList = Arrays.asList(
                orderDetailDto,
                orderDetailDto2,
                orderDetailDto3,
                orderDetailDto4);
        Map<String, List<OrderDetailDto>> resultMap = detailServices
                .orderDetailProcess(detailList);
        System.out.println(resultMap);
    }
}