Struct arrow::builder::Builder

pub struct Builder<T> where
    T: ArrowPrimitiveType,  { /* fields omitted */ }

Buffer builder with zero-copy build method

Methods

impl<T> Builder<T> where     T: ArrowPrimitiveType,

pub fn new() -> Self

Creates a builder with a default capacity

pub fn with_capacity(capacity: usize) -> Self

Creates a builder with a fixed capacity

pub fn len(&self) -> usize

Get the number of elements in the builder

pub fn capacity(&self) -> usize

Get the capacity of the builder (number of elements)

pub fn slice_mut(&mut self, start: usize, end: usize) -> &mut [T]

Get the internal byte-aligned memory buffer as a mutable slice

pub fn set_len(&mut self, len: usize)

Override the length

pub fn push(&mut self, v: T)

Push a value into the builder, growing the internal buffer as needed

pub fn set(&mut self, i: usize, v: T)

Set a value at a slot in the allocated memory without adjusting the length

pub fn push_slice(&mut self, slice: &[T])

push a slice of type T, growing the internal buffer as needed

pub fn reserve(&mut self, n: usize)

Reserve memory for n elements of type T

pub fn finish(&mut self) -> Buffer

Build a Buffer from the existing memory

Trait Implementations

impl<T> Drop for Builder<T> where     T: ArrowPrimitiveType,

fn drop(&mut self)

Executes the destructor for this type.