java - 在MapStruct映射后实现params转换

Question

我想使用 MapStruct 框架并扩展我映射的 Java 类。目前我使用这个:

// @Mapper(config = BaseMapperConfig.class)
public interface MerchantsMapper {

    MerchantNewDTO toNewDTO(Merchants merchant);
}

自定义实现:

public MerchantNewDTO toNewDTO(Merchants merchant)
  {
    MerchantNewDTO merchantNewDTO = new MerchantNewDTO();

    merchantNewDTO.setId(Integer.valueOf(merchant.getId()));
    ......

    MerchantConfigurationUtils merchant_config = new MerchantConfigurationUtils();
    Map<MerchantConfigurationFeatureBitString, Boolean> features = merchant_config.initFromDatabaseValue(merchant.getSupported_features());

    merchantNewDTO.setSupports_api(features.get(MerchantConfigurationFeatureBitString.Supports_api));

    return merchantNewDTO;
  }

如您所见，我想要获取 getSupported_features 并填充 Supports_api 值。

但是添加新值的过程非常痛苦。有没有某种方法可以创建扩展映射接口(interface)并设置/获取值的适配器？

你能推荐一些解决方案吗？

Answer 1

您可以使用@AfterMapping或@BeforeMapping来完成此操作。

@Mapper
public interface MerchantsMapper {

    @Mapping(target = "supports_api", ignore = "true")
    MerchantNewDTO toNewDTO(Merchant merchant);

    @AfterMapping
    default applyFeatures(@MappingTarget MerchatNewDTO merchantNewDTO, Merchant merchant) {

        MerchantConfigurationUtils merchant_config = new MerchantConfigurationUtils();
        Map<MerchantConfigurationFeatureBitString, Boolean> features = merchant_config.initFromDatabaseValue(merchant.getSupported_features());

        merchatNewDTO.setSupports_api(features.get(MerchantConfigurationFeatureBitString.Supports_api));
    }
}