Trait PropertyIndex 

pub trait PropertyIndex:
    PropertyIndex
    + Copy
    + Ord {
    type ArrowType: ArrowPrimitiveType<Native = Self> + 'static;
    type LittleEndianWord: FromBytes + Immutable + IntoBytes + KnownLayout + Unaligned + Copy;

    // Required methods
    fn to_usize(self) -> Option<usize>;
    fn from_usize(value: usize) -> Option<Self>;
    fn from_u64(value: u64) -> Option<Self>;
    fn to_u64(self) -> u64;
    fn to_le_word(self) -> Self::LittleEndianWord;
    fn from_le_word(word: Self::LittleEndianWord) -> Self;
    fn primitive_array(values: Vec<Self>) -> PrimitiveArray<Self::ArrowType>;
}

Unsigned index width usable for sparse property indexes.

Performance

Implementations perform checked conversions in O(1).

Required Associated Types

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

Arrow unsigned primitive type for sparse index arrays.

type LittleEndianWord: FromBytes + Immutable + IntoBytes + KnownLayout + Unaligned + Copy

Little-endian word used when this width appears in snapshots.

Required Methods

fn to_usize(self) -> Option<usize>

Returns self as usize, or None if the target platform cannot hold it.

Performance

This function is O(1).

fn from_usize(value: usize) -> Option<Self>

Converts value into this index width if it fits.

Performance

This function is O(1).

fn from_u64(value: u64) -> Option<Self>

Converts value into this index width if it fits.

Performance

This function is O(1).

fn to_u64(self) -> u64

Returns self as u64 for diagnostics.

Performance

This function is O(1).

fn to_le_word(self) -> Self::LittleEndianWord

Encodes self as a little-endian snapshot word.

Performance

This function is O(1).

fn from_le_word(word: Self::LittleEndianWord) -> Self

Decodes a little-endian snapshot word.

Performance

This function is O(1).

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

type LittleEndianWord = U16<LittleEndian>

fn to_usize(self) -> Option<usize>

fn from_usize(value: usize) -> Option<Self>

fn from_u64(value: u64) -> Option<Self>

fn to_u64(self) -> u64

fn to_le_word(self) -> Self::LittleEndianWord

fn from_le_word(word: Self::LittleEndianWord) -> Self

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

impl PropertyIndex for u32

type ArrowType = UInt32Type

type LittleEndianWord = U32<LittleEndian>

fn to_usize(self) -> Option<usize>

fn from_usize(value: usize) -> Option<Self>

fn from_u64(value: u64) -> Option<Self>

fn to_u64(self) -> u64

fn to_le_word(self) -> Self::LittleEndianWord

fn from_le_word(word: Self::LittleEndianWord) -> Self

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

impl PropertyIndex for u64

type ArrowType = UInt64Type

type LittleEndianWord = U64<LittleEndian>

fn to_usize(self) -> Option<usize>

fn from_usize(value: usize) -> Option<Self>

fn from_u64(value: u64) -> Option<Self>

fn to_u64(self) -> u64

fn to_le_word(self) -> Self::LittleEndianWord

fn from_le_word(word: Self::LittleEndianWord) -> Self

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

Implementors