westonpace commented on a change in pull request #9995:
URL: https://github.com/apache/arrow/pull/9995#discussion_r611706349
##########
File path: cpp/src/arrow/filesystem/filesystem.cc
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@@ -312,6 +315,23 @@ Result<std::vector<FileInfo>>
SubTreeFileSystem::GetFileInfo(const FileSelector&
return infos;
}
+FileInfoGenerator SubTreeFileSystem::GetFileInfoGenerator(const FileSelector&
select) {
+ auto selector = select;
+ selector.base_dir = PrependBase(selector.base_dir);
+ auto gen = base_fs_->GetFileInfoGenerator(selector);
+
+ auto self = checked_pointer_cast<SubTreeFileSystem>(shared_from_this());
+
+ std::function<Result<std::vector<FileInfo>>(const std::vector<FileInfo>&
infos)>
+ fix_infos = [self](std::vector<FileInfo> infos) ->
Result<std::vector<FileInfo>> {
+ for (auto& info : infos) {
+ RETURN_NOT_OK(self->FixInfo(&info));
+ }
+ return infos;
+ };
+ return MakeMappedGenerator(gen, fix_infos);
Review comment:
ARROW-12177 is one of the async quality of life issues I want to tackle
when I wrap up `AsyncScanner`.
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