Struct GraphTransformer 

pub struct GraphTransformer;

Graph transformation utilities

Implementations

impl GraphTransformer

pub fn filter_by_predicate<F>(triples: &[Triple], predicate: F) -> Vec<Triple>

where F: Fn(&str) -> bool,

Filter triples by predicate

Example

use oxirs_ttl::toolkit::graph_utils::GraphTransformer;
use oxirs_core::model::{Triple, NamedNode};

let triples = vec![
    Triple::new(
        NamedNode::new("http://example.org/s")?,
        NamedNode::new("http://example.org/p1")?,
        NamedNode::new("http://example.org/o")?,
    ),
    Triple::new(
        NamedNode::new("http://example.org/s")?,
        NamedNode::new("http://example.org/p2")?,
        NamedNode::new("http://example.org/o")?,
    ),
];

let filtered = GraphTransformer::filter_by_predicate(
    &triples,
    |p| p.ends_with("p1")
);
assert_eq!(filtered.len(), 1);

pub fn filter_by_subject<F>(triples: &[Triple], predicate: F) -> Vec<Triple>

where F: Fn(&Subject) -> bool,

Filter triples by subject

pub fn group_by_subject(triples: &[Triple]) -> HashMap<String, Vec<Triple>>

Group triples by subject

Returns a map from subject to all triples with that subject.

pub fn group_by_predicate(triples: &[Triple]) -> HashMap<String, Vec<Triple>>

Group triples by predicate

pub fn unique_subjects(triples: &[Triple]) -> Vec<String>

Get all unique subjects in the graph

pub fn unique_predicates(triples: &[Triple]) -> Vec<String>

Get all unique predicates in the graph

pub fn unique_objects(triples: &[Triple]) -> Vec<String>

Get all unique objects in the graph

Trait Implementations

impl Debug for GraphTransformer

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

Formats the value using the given formatter.