忽略列表中对象的特定属性

Question

我有这些对象：

Class 域

public class Partecipation implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
...
    @OneToMany(mappedBy = "partecipation")
    @Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
    private Set<DesignatedCompany> designatedCompanies = new HashSet<>();
...
}

我的 DTO

public class PartecipationDTO implements Serializable { 
    private Long id;
...
    private Set<DesignatedCompanyDTO> designatedCompanies = new HashSet<>();
...
}

已连接 DTO

public class DesignatedCompanyDTO implements Serializable {
    private Long id;
...
    private PartecipationDTO partecipation;
...
}

我有这个映射器：

public interface PartecipationMapper extends EntityMapper<PartecipationDTO, Partecipation> {
...
    PartecipationDTO toDto(Partecipation partecipation);
}

正确的是代码出错了，因为它进入了一个循环条件，详细信息在这里：

public class PartecipationMapperImpl implements PartecipationMapper {
...
    protected DesignatedCompanyDTO designatedCompanyToDesignatedCompanyDTO(DesignatedCompany designatedCompany) {
        if ( designatedCompany == null ) {
            return null;
        }

        DesignatedCompanyDTO designatedCompanyDTO = new DesignatedCompanyDTO();

        designatedCompanyDTO.setId( designatedCompany.getId() );
        designatedCompanyDTO.setCompanyEopooCode( designatedCompany.getCompanyEopooCode() );
        designatedCompanyDTO.setNote( designatedCompany.getNote() );
        designatedCompanyDTO.setPartecipation( toDto( designatedCompany.getPartecipation() ) ); // <--- this line cause the error

        return designatedCompanyDTO;
    }
...
}

是否可以在映射器中设置排除列表中子对象的属性？例如，像这样：

@Mapping(target = "designatedCompanies[].partecipation", ignore = true)

Answer 1

我已经解决了问题，感谢filiphr (https://github.com/mapstruct/mapstruct/issues/933#issuecomment-265952166)

在2个DTO的Mappers中工作，这里是代码：

@Mapper(componentModel = "spring", uses = {DesignatedCompanyMapper.class})
public interface PartecipationMapper extends EntityMapper<PartecipationDTO, Partecipation> {
...
    @Mapping(target = "designatedCompanies", qualifiedByName="NoPartecipation")
    PartecipationDTO toDto(Partecipation partecipation);
...
}

以及可迭代对象的Mapper

public interface DesignatedCompanyMapper extends EntityMapper<DesignatedCompanyDTO, DesignatedCompany> {
    @Mapping(source = "partecipation.id", target = "partecipationId")
    DesignatedCompanyDTO toDto(DesignatedCompany designatedCompany);
...
    @Named("NoPartecipation")
    @Mapping(source = "partecipation.id", target = "partecipationId")
    @Mapping(target = "partecipation", ignore = true)
    DesignatedCompanyDTO toDtoNoPartecipation(DesignatedCompany designatedCompany);
}

忽略列表中对象的特定属性

Ignore specific proprety of object in list

java

spring-boot

mapstruct