Consider to use addAll for mapping from Iterabale.

[AndreiPetrooshin]

Hi, I have the following situation:
I need to map Entity object from Customer object (protos).

@Mapping(target = "document", qualifiedByName = "mapToDocuments", source = "customer")
Entity mapToEntity(Customer customer);

    @Named("mapToDocuments")
    public List<Document> mapToDocuments(Customer customer) {
        List<Document> documents = new ArrayList<>();
        documents.add(mapToDocument1(customer.getDocument()));
        documents.add(mapToDocument2(customer.phone()));
        return documents;
    }

The main problem, that I have to create 2 Documents from 2 different fields of Customer objects.

But this approach doesn't work since mapper looking for method with return type Document instead of List.

Currently using CollectionMappingStrategy.ADDER_PREFERRED we can map only from (Customer.List<Document> or Document) to Entity.List<Document> in both cases entity.addDocument(Document document) will be used.

Can we tell somehow mapstruct to use addAll when we specify qualifiedByName which returns List<Docuement>?

Or maybe you can suggest other ways to get around this problem?