如何使用Mapstruct和Kotlin在另一个映射器中使用映射器？

Question

我想用Kotlin中的Mapstruct将实体映射到带有嵌套DTO的DTO。

data class FirstDto (
    val something: String
)

@Mapper(componentModel = "spring")
interface FirstMapper {

    fun entityToDto(entity: FirstEntity): FirstDto

    fun dtoToEntity(dto: FirstDto): FirstEntity
}

data class SecondDto (
    val somethingElse: String,
    val firstDto: FirstDto
)

在Java中，这是这样的:@mapper(componentModel=“spring”,uses=firstmapper.class)。

应该如何使用Kotlin实现它？

Answer 1

差别不大。纯粹的语法差异。

@Mapper(componentModel = "spring", uses = [FirstMapper::class])
interface SecondMapper {
   @Mapping(source = "firstEntity", target = "firstDto")
   fun entityToDto(entity: SecondEntity): SecondDto

   @Mapping(source = "firstDto", target = "firstEntity")
   fun dtoToEntity(dto: SecondDto): SecondEntity
}

它生成

public class SecondMapperImpl implements SecondMapper {
    private final FirstMapper firstMapper = Mappers.getMapper(FirstMapper.class);

    @Override
    public SecondDto entityToDto(SecondEntity entity) {
        ...

        firstDto = firstMapper.entityToDto(entity.getFirstEntity());
        somethingElse = entity.getSomethingElse();
        SecondDto secondDto = new SecondDto(somethingElse, firstDto);
        return secondDto;
    }

    @Override
    public SecondEntity dtoToEntity(SecondDto dto) {
        ...

        firstEntity = firstMapper.dtoToEntity(dto.getFirstDto());
        somethingElse = dto.getSomethingElse();
        SecondEntity secondEntity = new SecondEntity(somethingElse, firstEntity);
        return secondEntity;
    }
}