Struct lance::io::local::LocalObjectReader

pub struct LocalObjectReader { /* private fields */ }

ObjectReader for local file system.

Implementations

impl LocalObjectReader

pub fn open(path: &Path, block_size: usize) -> Result<Box<dyn ObjectReader>>

Open a local object reader, with default prefetch size.

Trait Implementations

impl ObjectReader for LocalObjectReader

fn size<'life0, 'async_trait>( &'life0 self ) -> Pin<Box<dyn Future<Output = Result<usize>> + Send + 'async_trait>>where Self: 'async_trait, 'life0: 'async_trait,

Returns the file size.

fn get_range<'life0, 'async_trait>( &'life0 self, range: Range<usize> ) -> Pin<Box<dyn Future<Output = Result<Bytes>> + Send + 'async_trait>>where Self: 'async_trait, 'life0: 'async_trait,

Reads a range of data.

TODO: return arrow_buffer::Buffer to avoid one memory copy from Bytes to Buffer.

fn path(&self) -> &Path

The file path of the object to read.

fn block_size(&self) -> usize

Suggest optimal I/O size per storage device.