Struct GraphView 

pub struct GraphView {
    pub name: String,
    pub base_iri: Option<String>,
    /* private fields */
}

A read-only, named view over a set of RDF triples.

Conceptually represents a named graph in an RDF dataset. The view holds an owned snapshot of the triples (or references to an external store via index).

Fields

name: String

Name / IRI of this graph view.

base_iri: Option<String>

Optional base IRI for relative IRI resolution.

Implementations

impl GraphView

pub fn new(name: &str, triples: Vec<RdfTriple>) -> Self

Create a new named graph view with the given triples.

pub fn with_base_iri(self, base: &str) -> Self

Set the base IRI for this view.

pub fn triples(&self) -> &[RdfTriple]

All triples in this view.

pub fn len(&self) -> usize

Number of triples in this view.

pub fn is_empty(&self) -> bool

pub fn find( &self, subject: Option<&str>, predicate: Option<&str>, object: Option<&str>, ) -> Vec<&RdfTriple>

Find all triples matching the given triple pattern. None = wildcard.

pub fn contains(&self, triple: &RdfTriple) -> bool

Returns true if the view contains triple.

pub fn subjects(&self) -> Vec<&str>

All distinct subjects in this view.

pub fn predicates(&self) -> Vec<&str>

All distinct predicates in this view.

pub fn objects(&self) -> Vec<&str>

All distinct objects in this view.

pub fn filter( &self, subject: Option<String>, predicate: Option<String>, object: Option<String>, ) -> FilteredView

Create a FilteredView over this view.

Trait Implementations

impl Clone for GraphView

fn clone(&self) -> GraphView

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GraphView

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

Formats the value using the given formatter.