Component Model "Class"

Use case

based on https://mapstruct.org/documentation/stable/reference/html/#passing-target-type, what if I don't need to inject anything? more context is at #3472

@Mapper(
        mappingControl = DeepClone.class,
        uses = GroupProxyFactory.class,
        componentModel = ComponentModel.SPRING)
interface GroupCloner {
    Group clone(Group source);
}

public class GroupProxyFactory {

// I could be static
    <T extends Group> T resolve(Group entity, @TargetType Class<T> clazz) {
        var trackedClass =
                TrackerProxyFactory.getTrackedClass(
                        clazz, GroupModifications.class, GroupChangeTrackingInvoker.class);
// obnoxious long, doesn't really matter implementation
        return res;
    }
}

I wrote a class with a static function (not thinking to annotate the class), and noticed it wasn't being used (actually it's still not).

I'm not longer sure if I'm reporting a bug, or requesting a feature... maybe both. It feels like this should work, but the generated code isn't using the GroupProxyFactory.

What I was going to suggest though is that it doesn't really need to know how to inject GroupProxyFactory, I wouldn't consider it a Bean it's just a class that it could new itself; or find a static method on.

As it is, even as documented it doesn't seem to work...

Generated Code

@Generated(
    value = "org.mapstruct.ap.MappingProcessor",
    date = "2023-12-18T13:09:06-0500",
    comments = "version: 1.5.5.Final, compiler: IncrementalProcessingEnvironment from gradle-language-java-8.5.jar, environment: Java 11.0.21 (Eclipse Adoptium)"
)
@Component
class GroupClonerImpl implements GroupCloner {

    @Override
    public Group clone(Group source) {
        if ( source == null ) {
            return null;
        }

        Group group = new Group();

should be

Group group = groupProxyFactory.resolve(source, Group.class);

Honestly I'd be even happier with

Group group = groupProxyFactory.resolve(source);

Possible workarounds

No response

MapStruct Version

1.5.5