Struct ArrayMetadata 

#[non_exhaustive]
pub struct ArrayMetadata {
    pub dimensions: Vec<i64>,
    pub element_type: String,
    pub logical_type: Option<String>,
    pub preferred_subarray_dimensions: Vec<i64>,
    pub store_created: Option<i64>,
    pub store_last_write: Option<i64>,
}

Shape and element type of a dataset, without reading it.

The answer to ETP’s GetDataArrayMetadata, and what a viewer needs before deciding whether it can afford the data.

Built with ArrayMetadata::new; #[non_exhaustive], so that what ETP adds to DataArrayMetadata is not a breaking change for every caller.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

dimensions: Vec<i64>

Number of elements along each dimension.

element_type: String

Element type, as the backend names it (double, int64, …) - the type the values travel in (ETP’s transportArrayType).

logical_type: Option<String>

ETP logicalArrayType, when the store distinguishes what the values mean from how they travel (an array of booleans carried as bytes). None when it does not: the element type is then all there is to say.

preferred_subarray_dimensions: Vec<i64>

ETP preferredSubarrayDimensions: the block a store would rather be read by (its chunking). Empty when it has no preference.

store_created: Option<i64>

ETP storeCreated of the array (microseconds since the Unix epoch, UTC). None when the store does not keep it.

store_last_write: Option<i64>

ETP storeLastWrite of the array, same unit. None when not kept.

Implementations

impl ArrayMetadata

pub fn new(dimensions: Vec<i64>, element_type: impl Into<String>) -> Self

A shape and an element type; everything the store may not know is left unknown.

Trait Implementations

impl Clone for ArrayMetadata

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ArrayMetadata

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

Formats the value using the given formatter.

impl Eq for ArrayMetadata

impl PartialEq for ArrayMetadata

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ArrayMetadata