一个接口的多个实现

一个接口，根据不同的平台有不同的实现类。

接口

public interface QuotationTransformService {

//    /**
//     * 获取来源
//     * @param vehicleQuotation
//     * @return String
//     */
//    String getPlatform(VehicleQuotation vehicleQuotation);

    /**
     * 复制保单前的属性备份，根据不同的平台，备份不同的字段
     * @param vehicleQuotation
     * @return map
     */
    Map backUpQuotation(VehicleQuotation vehicleQuotation) ;

    /**
     * 还原备份的字段
     * @param vehicleQuotation
     * @param attrMap
     * @return
     */
    void restoreQuotation(VehicleQuotation vehicleQuotation,Map attrMap);

}

实现类

public class GuangDongQuotationTransformServiceImpl implements QuotationTransformService {

    @Override
    public Map backUpQuotation(VehicleQuotation vehicleQuotation) {
        Map attributeMap = new HashMap();
        attributeMap.put("DealerType",vehicleQuotation.getVehicle().getDealerType());
        attributeMap.put("DealerCityCode",vehicleQuotation.getVehicle().getDealerCityCode());
        attributeMap.put("DealerName",vehicleQuotation.getVehicle().getDealerName());
        return attributeMap;
    }

    @Override
    public void restoreQuotation(VehicleQuotation vehicleQuotation, Map attrMap) {
        if(!attrMap.isEmpty()){
            if(attrMap.containsKey("DealerType")){
                vehicleQuotation.getVehicle().setDealerType(attrMap.get("DealerType").toString());
            }
            if(attrMap.containsKey("DealerCityCode")){
                vehicleQuotation.getVehicle().setDealerCityCode(attrMap.get("DealerCityCode").toString());
            }
            if(attrMap.containsKey("DealerName")){
                vehicleQuotation.getVehicle().setDealerName(attrMap.get("DealerName").toString());
            }
        }
    }
}

工厂

public class QuotationTransformServiceFactory {
    private static final Map<String, QuotationTransformService> quotationTransformServiceMap = new HashMap<>();

    static {
        quotationTransformServiceMap.put("GUANGDONG", new GuangDongQuotationTransformServiceImpl());
    }

    public static QuotationTransformService createQuotationTransformService(String platform) {
        QuotationTransformService quotationTransformService = quotationTransformServiceMap.get(platform);
        if (quotationTransformService == null) {
            throw new IllegalArgumentException("Invalid product type");
        }
        return quotationTransformService;
    }

}

调用

 Map attrMap = QuotationTransformServiceFactory.createQuotationTransformService(to.getPlateForm()).backUpQuotation(to);
QuotationTransformServiceFactory.createQuotationTransformService(to.getPlateForm()).restoreQuotation(to, attrMap);

如果只有一个实现的话，在工厂类中就不应该，为null时抛异常。添加map时应该还有其它比较好的方法