I am using following mapper to map entities:
public interface AssigmentFileMapper {
AssigmentFileDTO assigmentFileToAssigmentFileDTO(AssigmentFile assigmentFile);
AssigmentFile assigmentFileDTOToAssigmentFile(AssigmentFileDTO assigmentFileDTO);
@Mapping(target = "data", ignore = true)
List<AssigmentFileDTO> assigmentFilesToAssigmentFileDTOs(List<AssigmentFile> assigmentFiles);
List<AssigmentFile> assigmentFileDTOsToAssigmentFiles(List<AssigmentFileDTO> assigmentFileDTOs);
}
I need to ignore the "data" field only for entities that mapped as collection.
But it looks like @Mapping works only for single entities. Also I've noticed that generated method assigmentFilesToAssigmentFileDTOs just uses assigmentFileToAssigmentFileDTO in for-loop. Is there any solution for that?
MapStruct uses the assignment that it can find for the collection mapping. In order to achieve what you want you will have to define a custom method where you are going to ignore the data field explicitly and then use @IterableMapping(qualifiedBy) or @IterableMapping(qualifiedByName) to select the required method.
Your mapper should look like:
public interface AssigmentFileMapper {
AssigmentFileDTO assigmentFileToAssigmentFileDTO(AssigmentFile assigmentFile);
AssigmentFile assigmentFileDTOToAssigmentFile(AssigmentFileDTO assigmentFileDTO);
@IterableMapping(qualifiedByName="mapWithoutData")
List<AssigmentFileDTO> assigmentFilesToAssigmentFileDTOs(List<AssigmentFile> assigmentFiles);
List<AssigmentFile> assigmentFileDTOsToAssigmentFiles(List<AssigmentFileDTO> assigmentFileDTOs);
@Named("mapWithoutData")
@Mapping(target = "data", ignore = true)
AssignmentFileDto mapWithouData(AssignmentFile source)
}
You should use org.mapstruct.Named and not javax.inject.Named for this to work. You can also define your own annotation by using org.mapstruct.Qualifier
You can find more information here in the documentation.