Trait parquet::file::reader::ChunkReader

pub trait ChunkReader: Length + Send + Sync {
    type T: Read + Send;

    fn get_read(&self, start: u64, length: usize) -> Result<Self::T>;
}

The ChunkReader trait generates readers of chunks of a source. For a file system reader, each chunk might contain a clone of File bounded on a given range. For an object store reader, each read can be mapped to a range request.

Required Associated Types

type T: Read + Send

Required Methods

fn get_read(&self, start: u64, length: usize) -> Result<Self::T>

get a serialy readeable slice of the current reader This should fail if the slice exceeds the current bounds

Implementations on Foreign Types

impl ChunkReader for File

type T = FileSource<File>

fn get_read(&self, start: u64, length: usize) -> Result<Self::T>

Implementors

impl ChunkReader for SliceableCursor

type T = SliceableCursor