Struct ArrayView

pub struct ArrayView { /* private fields */ }

Zero-copy view over flatbuffer-encoded array data, created without eager serialization.

Implementations

impl ArrayView

pub fn try_new<F>( ctx: Arc<Context>, dtype: DType, len: usize, flatbuffer: Buffer, flatbuffer_init: F, buffers: Vec<Buffer>, ) -> VortexResult<Self>

where F: FnOnce(&[u8]) -> VortexResult<Array<'_>>,

pub fn flatbuffer(&self) -> Array<'_>

pub fn encoding(&self) -> EncodingRef

pub fn dtype(&self) -> &DType

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn metadata(&self) -> Option<&[u8]>

pub fn child(&self, idx: usize, dtype: &DType, len: usize) -> VortexResult<Self>

pub fn nchildren(&self) -> usize

pub fn children(&self) -> Vec<Array>

pub fn has_buffer(&self) -> bool

Whether the current Array makes use of a buffer

pub fn buffer(&self) -> Option<&Buffer>

pub fn statistics(&self) -> &dyn Statistics

Trait Implementations

impl Clone for ArrayView

fn clone(&self) -> ArrayView

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ArrayView

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

Formats the value using the given formatter.

impl IntoArray for ArrayView

fn into_array(self) -> Array

impl Statistics for ArrayView

fn to_set(&self) -> StatsSet

NB: part of the contract for to_set is that it does not do any expensive computation. In other implementations, this means returning the underlying stats map, but for the flatbuffer implemetation, we have ‘precalculated’ stats in the flatbuffer itself, so we need to alllocate a stats map and populate it with those fields.

fn set(&self, _stat: Stat, _value: Scalar)

We want to avoid any sort of allocation on instantiation of the ArrayView, so we do not allocate a stats_set to cache values.

fn get(&self, stat: Stat) -> Option<Scalar>

Returns the value of the statistic only if it’s present

fn compute(&self, stat: Stat) -> Option<Scalar>

Computes the value of the stat if it’s not present

fn compute_all(&self, stats: &[Stat]) -> VortexResult<StatsSet>

Compute all of the requested statistics (if not already present) Returns a StatsSet with the requested stats and any additional available stats

impl ToArray for ArrayView

fn to_array(&self) -> Array