Method num_record_batches

cpp/src/arrow/ipc/reader.cc:1366–1368

  RecordBatchFileReaderImpl() : file_(NULLPTR), footer_offset_(0), footer_(NULLPTR) {}

  int num_record_batches() const override {
    return static_cast<int>(internal::FlatBuffersVectorSize(footer_->recordBatches()));
  }

  MetadataVersion version() const override {
    return internal::GetMetadataVersion(footer_->version());