wgtmac commented on code in PR #143:
URL: https://github.com/apache/iceberg-cpp/pull/143#discussion_r2191968847
##########
src/iceberg/manifest_reader.h:
##########
@@ -34,19 +34,17 @@ namespace iceberg {
/// \brief Read manifest entries from a manifest file.
class ICEBERG_EXPORT ManifestReader {
public:
- virtual Result<std::span<std::unique_ptr<ManifestEntry>>> Entries() const =
0;
+ virtual Result<std::vector<std::unique_ptr<ManifestEntry>>> Entries() const
= 0;
- private:
- std::unique_ptr<Reader> reader_;
+ static std::shared_ptr<ManifestReader> NewReader(std::unique_ptr<Reader>
reader);
Review Comment:
BTW, should we create the reader internally using ReaderFactory? We know the
manifest schema and file format. Sometimes it is useful to directly return
Arrow arrays of manifest entries. Therefore I propose the following interface
and make them all static functions:
```cpp
class ICEBERG_EXPORT ManifestReader {
public:
static Result<std::unique_ptr<Reader>> MakeReader(
const std::string& manifest_list_location,
FileIO& file_io,
std::shared_ptr<Schema> schema = kManifestSchema);
static Result<std::vector<std::unique_ptr<ManifestEntry>>> ReadEntries(
const std::string& manifest_list_location,
FileIO& file_io);
};
```
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