子类的 Mapstruct 映射不起作用

Question

I have two classes Order and TargetOrder

class Order {
   Location location;
   Address address;
}
class Location{
   double lat;
   double lng;
}

class Address{
   .
   .
   .
}

Target Order looks something like this:

class TargetOrder{
   TargetAddress targetAddress;
}

class TargetAddress{
   double lat;
   double lng;
   .
   .
   .
}

Now I have written MapStruct mapping for Address to TargetAddress;

So, something like this:

@Mapper(componentModel = "spring", unmappedTargetPolicy = ReportingPolicy.IGNORE)
public interface OrderMapper {

    @Mapping(...)
    @Mapping(...)
    TargetAddress mapAddressToTargetAddress(Address address);

    @Mapping(target = "targetAddress", source = "address")
    @Mapping(target = "targetAddress.lat", source = "location.lat")
    @Mapping(target = "targetAddress.lng", source = "location.lng")
    TargetOrder mapOrderToTargetOrder(Order order);

When I do this, mapOrderToTargetOrder implementation doesn't use existing mapAddressToTargetAddress

but if I remove

@Mapping(target = "targetAddress.lat", source = "location.lat")
@Mapping(target = "targetAddress.lng", source = "location.lng")

Then mapper uses existing mapAddressToTargetAddress .

I want to map using existing mapping and then map location attributes as well. I have tried using @MappingTarget as well it is not working.

Is there any other way to implement this?

Answer 1

Try to use mapStruct @Named annotation and specify the additional qualifiedByName parameter in @Mapping annotation.

@Mapper(componentModel = "spring", unmappedTargetPolicy = ReportingPolicy.IGNORE)
public interface OrderMapper {

    @Named("mapAddressToTargetAddress")
    @Mapping(...)
    @Mapping(...)
    TargetAddress mapAddressToTargetAddress(Address address);

    @Mapping(target = "targetAddress", source = "address", qualifiedByName = "mapAddressToTargetAddress")
    @Mapping(target = "lat", source = "location.lat")
    @Mapping(target = "lng", source = "location.lng")
    TargetOrder mapOrderToTargetOrder(Order order);
}