Struct Attributes 

pub struct Attributes { /* private fields */ }

The attribute relationships of every concept.

Implementations

impl Attributes

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) -> Attributes

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() -> Attributes

Returns the “default value” for a type.

impl Eq for Attributes

impl PartialEq for Attributes

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Attributes