Trait PropertyIndex 

pub trait PropertyIndex:
    PropertyIndex
    + SnapshotWidth
    + Into<u64> {
    type ArrowType: ArrowPrimitiveType<Native = Self> + 'static;

    // Required method
    fn primitive_array(values: Vec<Self>) -> PrimitiveArray<Self::ArrowType>;
}

Unsigned index width usable for sparse property indexes.

This is the thin Arrow-specific layer over the shared SnapshotWidth contract: the usize/little-endian-word conversions and SnapshotWidth::WIDTH_CODE resolve through that trait, so I::LittleEndianWord and I::to_le_word have one definition substrate-wide. This trait only adds the Arrow primitive-array vocabulary plus the Into<u64> diagnostic widening.

Performance

Implementations perform conversions in O(1) and array construction in O(values.len()).

Required Associated Types

type ArrowType: ArrowPrimitiveType<Native = Self> + 'static

Arrow unsigned primitive type for sparse index arrays.

Required Methods

fn primitive_array(values: Vec<Self>) -> PrimitiveArray<Self::ArrowType>

Builds an Arrow primitive array from native index values.

Performance

This function is O(values.len()).

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl PropertyIndex for u16

type ArrowType = UInt16Type

fn primitive_array(values: Vec<Self>) -> PrimitiveArray<Self::ArrowType>

impl PropertyIndex for u32

type ArrowType = UInt32Type

fn primitive_array(values: Vec<Self>) -> PrimitiveArray<Self::ArrowType>

impl PropertyIndex for u64

type ArrowType = UInt64Type

fn primitive_array(values: Vec<Self>) -> PrimitiveArray<Self::ArrowType>

Implementors