When using the mapstruct library for mapping dto objects to domain objects a common problem encountered is the ability to map Hashmaps to object properties.
Existing code to acheive this is to use a custom function which will get a hashmap index from the map and return it.

  @Mapper()
public abstract class OrderMapper {

@Mappings({
        @Mapping(target="id", expression="java( getIdFlag(order, \"id\"))"),
})
abstract Order toDomainOrder order);

}

proposed syntax.

 @Mapper()
public abstract class OrderMapper {

@Mappings({
        @Mapping(target="id", expression="ids[id]"),
})
abstract Order toDomainOrder order);

}

is this something already being investigated or considered?