Struct parquet::file::writer::InMemoryWriteableCursor

pub struct InMemoryWriteableCursor { /* fields omitted */ }

Use this type to write Parquet to memory rather than a file.

Implementations

impl InMemoryWriteableCursor

pub fn into_inner(self) -> Option<Vec<u8>>

Consume this instance and return the underlying buffer as long as there are no other references to this instance.

pub fn data(&self) -> Vec<u8>

Returns a clone of the underlying buffer

Trait Implementations

impl Clone for InMemoryWriteableCursor

fn clone(&self) -> InMemoryWriteableCursor

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for InMemoryWriteableCursor

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for InMemoryWriteableCursor

fn default() -> InMemoryWriteableCursor

Returns the “default value” for a type.

impl Seek for InMemoryWriteableCursor

fn seek(&mut self, pos: SeekFrom) -> Result<u64>

Seek to an offset, in bytes, in a stream.

fn rewind(&mut self) -> Result<(), Error>

🔬 This is a nightly-only experimental API. (seek_rewind)

Rewind to the beginning of a stream.

fn stream_len(&mut self) -> Result<u64, Error>

🔬 This is a nightly-only experimental API. (seek_stream_len)

Returns the length of this stream (in bytes).

fn stream_position(&mut self) -> Result<u64, Error>

Returns the current seek position from the start of the stream.

impl TryClone for InMemoryWriteableCursor

fn try_clone(&self) -> Result<Self>

Clones the type returning a new instance or an error if it’s not possible to clone it.

impl Write for InMemoryWriteableCursor

fn write(&mut self, buf: &[u8]) -> Result<usize>

Write a buffer into this writer, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers.

fn is_write_vectored(&self) -> bool

🔬 This is a nightly-only experimental API. (can_vector)

Determines if this Writer has an efficient write_vectored implementation.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬 This is a nightly-only experimental API. (write_all_vectored)

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

Creates a “by reference” adaptor for this instance of Write.