Fork of https://github.com/oxigraph/oxigraph.git for the purpose of NextGraph project
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oxigraph/lib/src/model/named_node.rs

70 lines
1.6 KiB

use std::fmt;
use std::str::FromStr;
use std::sync::Arc;
use url::Url;
use Error;
use Result;
/// A RDF [IRI](https://www.w3.org/TR/rdf11-concepts/#dfn-iri)
///
/// The common way to build it is to use the `FromStr::from_str` trait method.
/// This method takes care of usual IRI normalization and validation.
///
/// The default string formatter is returning a N-Triples, Turtle and SPARQL compatible representation:
/// ```
/// use rudf::model::NamedNode;
/// use std::str::FromStr;
///
/// assert_eq!(
/// "<http://example.com/foo>",
/// NamedNode::from_str("http://example.com/foo").unwrap().to_string()
/// )
/// ```
///
#[derive(Eq, PartialEq, Ord, PartialOrd, Debug, Clone, Hash)]
pub struct NamedNode {
iri: Arc<Url>,
}
impl fmt::Display for NamedNode {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "<{}>", self.iri)
}
}
impl NamedNode {
/// Builds a RDF [IRI](https://www.w3.org/TR/rdf11-concepts/#dfn-iri)
pub fn new(iri: impl Into<Url>) -> Self {
Self {
iri: Arc::new(iri.into()),
}
}
pub fn as_str(&self) -> &str {
self.iri.as_str()
}
pub fn as_url(&self) -> &Url {
&self.iri
}
}
impl From<Url> for NamedNode {
fn from(url: Url) -> Self {
Self { iri: Arc::new(url) }
}
}
impl From<NamedNode> for Url {
fn from(named_node: NamedNode) -> Self {
Arc::try_unwrap(named_node.iri).unwrap_or_else(|iri| (*iri).clone())
}
}
impl FromStr for NamedNode {
type Err = Error;
fn from_str(s: &str) -> Result<Self> {
Ok(Self::new(Url::parse(s)?))
}
}