Struct Attributes 

pub struct Attributes { /* private fields */ }

The attribute relationships of every concept.

Implementations

impl Attributes

pub fn rows_size_in_bytes(&self) -> usize

The heap bytes the rows hold (crate::footprint).

pub fn inverted_size_in_bytes(&self) -> usize

The heap bytes the inverted index holds.

It is derived when the artifact opens rather than read from it, so it is reported apart from the rows it was derived from.

pub fn size_in_bytes(&self) -> usize

The heap bytes the rows and the inverted index hold together.

pub fn build( nodes: u32, types: Vec<u64>, edges: Vec<Edge>, ) -> Result<Self, AttributesError>

Builds the attributes of nodes concepts from edges, whose types index types.

Errors

Returns AttributesError::OutOfRange for a row beyond nodes or beyond the type list, and AttributesError::TooMany past u32.

pub fn types(&self) -> &[u64]

The attribute type SCTIDs, in type-index order.

pub fn kind(&self, sctid: u64) -> Option<u32>

The type index of sctid.

pub fn nodes(&self) -> u32

The number of concepts.

pub fn edges(&self) -> usize

The number of rows.

pub fn rows(&self, source: Ordinal) -> impl Iterator<Item = Row<'_>> + '_

The rows of source, sorted by group, then type, then value.

pub fn sources(&self, kind: u32, target: Ordinal) -> &[u32]

The sources with a relationship of type kind to target, sorted.

pub fn sources_of_kind(&self, kind: u32) -> Option<&RoaringBitmap>

Every source with a relationship of type kind, whatever its value.

pub fn targets_of_kind(&self, kind: u32) -> &[u32]

The destination concepts of type kind, sorted.

pub fn write_to(&self, out: &mut impl Write) -> Result<(), AttributesError>

Writes the layout.

Errors

Returns AttributesError::Io when writing fails.

pub fn read_from(input: &mut impl Read) -> Result<Self, AttributesError>

Reads the layout and derives the inverted index.

Errors

Returns AttributesError for a truncated, inconsistent, or foreign artifact.

Trait Implementations

impl Clone for Attributes

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 Attributes

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

Formats the value using the given formatter.

impl Default for Attributes

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Attributes

impl PartialEq for Attributes

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Attributes