mapstruct with protobuf3

mapstructwithprotobuf

public class Proto3AccessorNamingStrategy 
    extends DefaultAccessorNamingStrategy {

    @Override
    public String getElementName(ExecutableElement adderMethod) {
        String methodName = 
            adderMethod.getSimpleName().toString() + "List";
        return Introspector.decapitalize(methodName.substring(3));
    }
}

@Mapper(uses = BuilderFactory.class, 
        collectionMappingStrategy = 
            CollectionMappingStrategy.ADDER_PREFERRED)
public interface LoginServerMapper {

    LoginServerMapper MAPPER = Mappers.getMapper(LoginServerMapper.class);

    @Mapping(source = "permissions", target = "permissionsList")
    LoginResponseDTO.Builder map(LoginResult result);

    PermissionDTO map(Permission permission);

    class BuilderFactory {
        public LoginResponseDTO.Builder create() {
            return LoginResponseDTO.newBuilder();
        }
    }
}