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oxigraph/lib/spargebra/src/term.rs

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29 KiB

//! Data structures for [RDF 1.1 Concepts](https://www.w3.org/TR/rdf11-concepts/) like IRI, literal or triples.
pub use oxrdf::{BlankNode, Literal, NamedNode, Subject, Term, Triple, Variable};
use std::fmt;
use std::fmt::Write;
/// The union of [IRIs](https://www.w3.org/TR/rdf11-concepts/#dfn-iri) and [triples](https://www.w3.org/TR/rdf11-concepts/#dfn-rdf-triple).
///
/// The default string formatter is returning an N-Triples, Turtle, and SPARQL compatible representation.
#[derive(Eq, PartialEq, Debug, Clone, Hash)]
pub enum GroundSubject {
NamedNode(NamedNode),
#[cfg(feature = "rdf-star")]
Triple(Box<GroundTriple>),
}
impl fmt::Display for GroundSubject {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Self::NamedNode(node) => node.fmt(f),
#[cfg(feature = "rdf-star")]
Self::Triple(triple) => write!(
f,
"<<{} {} {}>>",
triple.subject, triple.predicate, triple.object
),
}
}
}
impl From<NamedNode> for GroundSubject {
#[inline]
fn from(node: NamedNode) -> Self {
Self::NamedNode(node)
}
}
#[cfg(feature = "rdf-star")]
impl From<GroundTriple> for GroundSubject {
#[inline]
fn from(triple: GroundTriple) -> Self {
Self::Triple(Box::new(triple))
}
}
impl TryFrom<Subject> for GroundSubject {
type Error = ();
#[inline]
fn try_from(subject: Subject) -> Result<Self, ()> {
match subject {
Subject::NamedNode(t) => Ok(t.into()),
Subject::BlankNode(_) => Err(()),
#[cfg(feature = "rdf-star")]
Subject::Triple(t) => Ok(GroundTriple::try_from(*t)?.into()),
}
}
}
impl TryFrom<GroundTerm> for GroundSubject {
type Error = ();
#[inline]
fn try_from(term: GroundTerm) -> Result<Self, ()> {
match term {
GroundTerm::NamedNode(t) => Ok(t.into()),
GroundTerm::Literal(_) => Err(()),
#[cfg(feature = "rdf-star")]
GroundTerm::Triple(t) => Ok((*t).into()),
}
}
}
/// The union of [IRIs](https://www.w3.org/TR/rdf11-concepts/#dfn-iri), [literals](https://www.w3.org/TR/rdf11-concepts/#dfn-literal) and [triples](https://www.w3.org/TR/rdf11-concepts/#dfn-rdf-triple).
///
/// The default string formatter is returning an N-Triples, Turtle, and SPARQL compatible representation.
#[derive(Eq, PartialEq, Debug, Clone, Hash)]
pub enum GroundTerm {
NamedNode(NamedNode),
Literal(Literal),
#[cfg(feature = "rdf-star")]
Triple(Box<GroundTriple>),
}
impl fmt::Display for GroundTerm {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Self::NamedNode(node) => node.fmt(f),
Self::Literal(literal) => literal.fmt(f),
#[cfg(feature = "rdf-star")]
Self::Triple(triple) => write!(
f,
"<<{} {} {}>>",
triple.subject, triple.predicate, triple.object
),
}
}
}
impl From<NamedNode> for GroundTerm {
#[inline]
fn from(node: NamedNode) -> Self {
Self::NamedNode(node)
}
}
impl From<Literal> for GroundTerm {
#[inline]
fn from(literal: Literal) -> Self {
Self::Literal(literal)
}
}
#[cfg(feature = "rdf-star")]
impl From<GroundTriple> for GroundTerm {
#[inline]
fn from(triple: GroundTriple) -> Self {
Self::Triple(Box::new(triple))
}
}
impl TryFrom<Term> for GroundTerm {
type Error = ();
#[inline]
fn try_from(term: Term) -> Result<Self, ()> {
match term {
Term::NamedNode(t) => Ok(t.into()),
Term::BlankNode(_) => Err(()),
Term::Literal(t) => Ok(t.into()),
#[cfg(feature = "rdf-star")]
Term::Triple(t) => Ok(GroundTriple::try_from(*t)?.into()),
}
}
}
/// A [RDF triple](https://www.w3.org/TR/rdf11-concepts/#dfn-rdf-triple) without blank nodes.
///
/// The default string formatter is returning a N-Quads representation.
///
/// ```
/// use spargebra::term::{NamedNode, GroundTriple};
///
/// assert_eq!(
/// "<http://example.com/s> <http://example.com/p> <http://example.com/o>",
/// GroundTriple {
/// subject: NamedNode::new("http://example.com/s")?.into(),
/// predicate: NamedNode::new("http://example.com/p")?,
/// object: NamedNode::new("http://example.com/o")?.into(),
/// }.to_string()
/// );
/// # Result::<_,oxrdf::IriParseError>::Ok(())
/// ```
#[derive(Eq, PartialEq, Debug, Clone, Hash)]
pub struct GroundTriple {
pub subject: GroundSubject,
pub predicate: NamedNode,
pub object: GroundTerm,
}
impl fmt::Display for GroundTriple {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{} {} {}", self.subject, self.predicate, self.object)
}
}
impl TryFrom<Triple> for GroundTriple {
type Error = ();
#[inline]
fn try_from(triple: Triple) -> Result<Self, ()> {
Ok(Self {
subject: triple.subject.try_into()?,
predicate: triple.predicate,
object: triple.object.try_into()?,
})
}
}
/// A possible graph name.
///
/// It is the union of [IRIs](https://www.w3.org/TR/rdf11-concepts/#dfn-iri) and the [default graph name](https://www.w3.org/TR/rdf11-concepts/#dfn-default-graph).
#[derive(Eq, PartialEq, Debug, Clone, Hash)]
pub enum GraphName {
NamedNode(NamedNode),
DefaultGraph,
}
impl GraphName {
/// Formats using the [SPARQL S-Expression syntax](https://jena.apache.org/documentation/notes/sse.html).
pub(crate) fn fmt_sse(&self, f: &mut impl Write) -> fmt::Result {
match self {
Self::NamedNode(node) => write!(f, "{node}"),
Self::DefaultGraph => write!(f, "default"),
}
}
}
impl fmt::Display for GraphName {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Self::NamedNode(node) => node.fmt(f),
Self::DefaultGraph => write!(f, "DEFAULT"),
}
}
}
impl From<NamedNode> for GraphName {
#[inline]
fn from(node: NamedNode) -> Self {
Self::NamedNode(node)
}
}
impl TryFrom<GraphNamePattern> for GraphName {
type Error = ();
#[inline]
fn try_from(pattern: GraphNamePattern) -> Result<Self, ()> {
match pattern {
GraphNamePattern::NamedNode(t) => Ok(t.into()),
GraphNamePattern::DefaultGraph => Ok(Self::DefaultGraph),
GraphNamePattern::Variable(_) => Err(()),
}
}
}
/// A [RDF triple](https://www.w3.org/TR/rdf11-concepts/#dfn-rdf-triple) in an [RDF dataset](https://www.w3.org/TR/rdf11-concepts/#dfn-rdf-dataset).
///
/// The default string formatter is returning a N-Quads representation.
///
/// ```
/// use spargebra::term::{NamedNode, Quad};
///
/// assert_eq!(
/// "<http://example.com/s> <http://example.com/p> <http://example.com/o> <http://example.com/g>",
/// Quad {
/// subject: NamedNode::new("http://example.com/s")?.into(),
/// predicate: NamedNode::new("http://example.com/p")?,
/// object: NamedNode::new("http://example.com/o")?.into(),
/// graph_name: NamedNode::new("http://example.com/g")?.into(),
/// }.to_string()
/// );
/// # Result::<_,oxrdf::IriParseError>::Ok(())
/// ```
#[derive(Eq, PartialEq, Debug, Clone, Hash)]
pub struct Quad {
pub subject: Subject,
pub predicate: NamedNode,
pub object: Term,
pub graph_name: GraphName,
}
impl Quad {
/// Formats using the [SPARQL S-Expression syntax](https://jena.apache.org/documentation/notes/sse.html).
pub(crate) fn fmt_sse(&self, f: &mut impl Write) -> fmt::Result {
if self.graph_name != GraphName::DefaultGraph {
write!(f, "(graph ")?;
self.graph_name.fmt_sse(f)?;
write!(f, " (")?;
}
write!(
f,
"(triple {} {} {})",
self.subject, self.predicate, self.object
)?;
if self.graph_name != GraphName::DefaultGraph {
write!(f, "))")?;
}
Ok(())
}
}
impl fmt::Display for Quad {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
if self.graph_name == GraphName::DefaultGraph {
write!(f, "{} {} {}", self.subject, self.predicate, self.object)
} else {
write!(
f,
"{} {} {} {}",
self.subject, self.predicate, self.object, self.graph_name
)
}
}
}
impl TryFrom<QuadPattern> for Quad {
type Error = ();
#[inline]
fn try_from(quad: QuadPattern) -> Result<Self, ()> {
Ok(Self {
subject: quad.subject.try_into()?,
predicate: quad.predicate.try_into()?,
object: quad.object.try_into()?,
graph_name: quad.graph_name.try_into()?,
})
}
}
/// A [RDF triple](https://www.w3.org/TR/rdf11-concepts/#dfn-rdf-triple) in an [RDF dataset](https://www.w3.org/TR/rdf11-concepts/#dfn-rdf-dataset) without blank nodes.
///
/// The default string formatter is returning a N-Quads representation.
///
/// ```
/// use spargebra::term::{NamedNode, GroundQuad};
///
/// assert_eq!(
/// "<http://example.com/s> <http://example.com/p> <http://example.com/o> <http://example.com/g>",
/// GroundQuad {
/// subject: NamedNode::new("http://example.com/s")?.into(),
/// predicate: NamedNode::new("http://example.com/p")?,
/// object: NamedNode::new("http://example.com/o")?.into(),
/// graph_name: NamedNode::new("http://example.com/g")?.into(),
/// }.to_string()
/// );
/// # Result::<_,oxrdf::IriParseError>::Ok(())
/// ```
#[derive(Eq, PartialEq, Debug, Clone, Hash)]
pub struct GroundQuad {
pub subject: GroundSubject,
pub predicate: NamedNode,
pub object: GroundTerm,
pub graph_name: GraphName,
}
impl GroundQuad {
/// Formats using the [SPARQL S-Expression syntax](https://jena.apache.org/documentation/notes/sse.html).
pub(crate) fn fmt_sse(&self, f: &mut impl Write) -> fmt::Result {
if self.graph_name != GraphName::DefaultGraph {
write!(f, "(graph ")?;
self.graph_name.fmt_sse(f)?;
write!(f, " (")?;
}
write!(
f,
"(triple {} {} {})",
self.subject, self.predicate, self.object
)?;
if self.graph_name != GraphName::DefaultGraph {
write!(f, "))")?;
}
Ok(())
}
}
impl fmt::Display for GroundQuad {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
if self.graph_name == GraphName::DefaultGraph {
write!(f, "{} {} {}", self.subject, self.predicate, self.object)
} else {
write!(
f,
"{} {} {} {}",
self.subject, self.predicate, self.object, self.graph_name
)
}
}
}
impl TryFrom<Quad> for GroundQuad {
type Error = ();
#[inline]
fn try_from(quad: Quad) -> Result<Self, ()> {
Ok(Self {
subject: quad.subject.try_into()?,
predicate: quad.predicate,
object: quad.object.try_into()?,
graph_name: quad.graph_name,
})
}
}
/// The union of [IRIs](https://www.w3.org/TR/rdf11-concepts/#dfn-iri) and [variables](https://www.w3.org/TR/sparql11-query/#sparqlQueryVariables).
#[derive(Eq, PartialEq, Debug, Clone, Hash)]
pub enum NamedNodePattern {
NamedNode(NamedNode),
Variable(Variable),
}
impl NamedNodePattern {
/// Formats using the [SPARQL S-Expression syntax](https://jena.apache.org/documentation/notes/sse.html).
pub(crate) fn fmt_sse(&self, f: &mut impl Write) -> fmt::Result {
match self {
Self::NamedNode(node) => write!(f, "{node}"),
Self::Variable(var) => write!(f, "{var}"),
}
}
}
impl fmt::Display for NamedNodePattern {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Self::NamedNode(node) => node.fmt(f),
Self::Variable(var) => var.fmt(f),
}
}
}
impl From<NamedNode> for NamedNodePattern {
#[inline]
fn from(node: NamedNode) -> Self {
Self::NamedNode(node)
}
}
impl From<Variable> for NamedNodePattern {
#[inline]
fn from(var: Variable) -> Self {
Self::Variable(var)
}
}
impl TryFrom<NamedNodePattern> for NamedNode {
type Error = ();
#[inline]
fn try_from(pattern: NamedNodePattern) -> Result<Self, ()> {
match pattern {
NamedNodePattern::NamedNode(t) => Ok(t),
NamedNodePattern::Variable(_) => Err(()),
}
}
}
/// The union of [terms](https://www.w3.org/TR/rdf11-concepts/#dfn-rdf-term) and [variables](https://www.w3.org/TR/sparql11-query/#sparqlQueryVariables).
#[derive(Eq, PartialEq, Debug, Clone, Hash)]
pub enum TermPattern {
NamedNode(NamedNode),
BlankNode(BlankNode),
Literal(Literal),
#[cfg(feature = "rdf-star")]
Triple(Box<TriplePattern>),
Variable(Variable),
}
impl TermPattern {
/// Formats using the [SPARQL S-Expression syntax](https://jena.apache.org/documentation/notes/sse.html).
pub(crate) fn fmt_sse(&self, f: &mut impl Write) -> fmt::Result {
match self {
Self::NamedNode(term) => write!(f, "{term}"),
Self::BlankNode(term) => write!(f, "{term}"),
Self::Literal(term) => write!(f, "{term}"),
#[cfg(feature = "rdf-star")]
Self::Triple(triple) => triple.fmt_sse(f),
Self::Variable(var) => write!(f, "{var}"),
}
}
}
impl fmt::Display for TermPattern {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Self::NamedNode(term) => term.fmt(f),
Self::BlankNode(term) => term.fmt(f),
Self::Literal(term) => term.fmt(f),
#[cfg(feature = "rdf-star")]
Self::Triple(triple) => write!(f, "<<{triple}>>"),
Self::Variable(var) => var.fmt(f),
}
}
}
impl From<NamedNode> for TermPattern {
#[inline]
fn from(node: NamedNode) -> Self {
Self::NamedNode(node)
}
}
impl From<BlankNode> for TermPattern {
#[inline]
fn from(node: BlankNode) -> Self {
Self::BlankNode(node)
}
}
impl From<Literal> for TermPattern {
#[inline]
fn from(literal: Literal) -> Self {
Self::Literal(literal)
}
}
#[cfg(feature = "rdf-star")]
impl From<TriplePattern> for TermPattern {
#[inline]
fn from(triple: TriplePattern) -> Self {
Self::Triple(Box::new(triple))
}
}
impl From<Variable> for TermPattern {
fn from(var: Variable) -> Self {
Self::Variable(var)
}
}
impl From<Subject> for TermPattern {
#[inline]
fn from(subject: Subject) -> Self {
match subject {
Subject::NamedNode(node) => node.into(),
Subject::BlankNode(node) => node.into(),
#[cfg(feature = "rdf-star")]
Subject::Triple(t) => TriplePattern::from(*t).into(),
}
}
}
impl From<Term> for TermPattern {
#[inline]
fn from(term: Term) -> Self {
match term {
Term::NamedNode(node) => node.into(),
Term::BlankNode(node) => node.into(),
Term::Literal(literal) => literal.into(),
#[cfg(feature = "rdf-star")]
Term::Triple(t) => TriplePattern::from(*t).into(),
}
}
}
impl From<NamedNodePattern> for TermPattern {
#[inline]
fn from(element: NamedNodePattern) -> Self {
match element {
NamedNodePattern::NamedNode(node) => node.into(),
NamedNodePattern::Variable(var) => var.into(),
}
}
}
impl TryFrom<TermPattern> for Subject {
type Error = ();
#[inline]
fn try_from(term: TermPattern) -> Result<Self, ()> {
match term {
TermPattern::NamedNode(t) => Ok(t.into()),
TermPattern::BlankNode(t) => Ok(t.into()),
#[cfg(feature = "rdf-star")]
TermPattern::Triple(t) => Ok(Triple::try_from(*t)?.into()),
TermPattern::Literal(_) | TermPattern::Variable(_) => Err(()),
}
}
}
impl TryFrom<TermPattern> for Term {
type Error = ();
#[inline]
fn try_from(pattern: TermPattern) -> Result<Self, ()> {
match pattern {
TermPattern::NamedNode(t) => Ok(t.into()),
TermPattern::BlankNode(t) => Ok(t.into()),
TermPattern::Literal(t) => Ok(t.into()),
#[cfg(feature = "rdf-star")]
TermPattern::Triple(t) => Ok(Triple::try_from(*t)?.into()),
TermPattern::Variable(_) => Err(()),
}
}
}
/// The union of [terms](https://www.w3.org/TR/rdf11-concepts/#dfn-rdf-term) and [variables](https://www.w3.org/TR/sparql11-query/#sparqlQueryVariables) without blank nodes.
#[derive(Eq, PartialEq, Debug, Clone, Hash)]
pub enum GroundTermPattern {
NamedNode(NamedNode),
Literal(Literal),
Variable(Variable),
#[cfg(feature = "rdf-star")]
Triple(Box<GroundTriplePattern>),
}
impl GroundTermPattern {
/// Formats using the [SPARQL S-Expression syntax](https://jena.apache.org/documentation/notes/sse.html).
pub(crate) fn fmt_sse(&self, f: &mut impl Write) -> fmt::Result {
match self {
Self::NamedNode(term) => write!(f, "{term}"),
Self::Literal(term) => write!(f, "{term}"),
Self::Variable(var) => write!(f, "{var}"),
#[cfg(feature = "rdf-star")]
Self::Triple(triple) => triple.fmt_sse(f),
}
}
}
impl fmt::Display for GroundTermPattern {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Self::NamedNode(term) => term.fmt(f),
Self::Literal(term) => term.fmt(f),
Self::Variable(var) => var.fmt(f),
#[cfg(feature = "rdf-star")]
Self::Triple(triple) => write!(f, "<<{triple}>>"),
}
}
}
impl From<NamedNode> for GroundTermPattern {
#[inline]
fn from(node: NamedNode) -> Self {
Self::NamedNode(node)
}
}
impl From<Literal> for GroundTermPattern {
#[inline]
fn from(literal: Literal) -> Self {
Self::Literal(literal)
}
}
#[cfg(feature = "rdf-star")]
impl From<GroundTriplePattern> for GroundTermPattern {
#[inline]
fn from(triple: GroundTriplePattern) -> Self {
Self::Triple(Box::new(triple))
}
}
impl From<Variable> for GroundTermPattern {
#[inline]
fn from(var: Variable) -> Self {
Self::Variable(var)
}
}
impl From<GroundSubject> for GroundTermPattern {
#[inline]
fn from(term: GroundSubject) -> Self {
match term {
GroundSubject::NamedNode(node) => node.into(),
#[cfg(feature = "rdf-star")]
GroundSubject::Triple(triple) => GroundTriplePattern::from(*triple).into(),
}
}
}
impl From<GroundTerm> for GroundTermPattern {
#[inline]
fn from(term: GroundTerm) -> Self {
match term {
GroundTerm::NamedNode(node) => node.into(),
GroundTerm::Literal(literal) => literal.into(),
#[cfg(feature = "rdf-star")]
GroundTerm::Triple(triple) => GroundTriplePattern::from(*triple).into(),
}
}
}
impl From<NamedNodePattern> for GroundTermPattern {
#[inline]
fn from(element: NamedNodePattern) -> Self {
match element {
NamedNodePattern::NamedNode(node) => node.into(),
NamedNodePattern::Variable(var) => var.into(),
}
}
}
impl TryFrom<TermPattern> for GroundTermPattern {
type Error = ();
#[inline]
fn try_from(pattern: TermPattern) -> Result<Self, ()> {
Ok(match pattern {
TermPattern::NamedNode(named_node) => named_node.into(),
TermPattern::BlankNode(_) => return Err(()),
TermPattern::Literal(literal) => literal.into(),
#[cfg(feature = "rdf-star")]
TermPattern::Triple(triple) => GroundTriplePattern::try_from(*triple)?.into(),
TermPattern::Variable(variable) => variable.into(),
})
}
}
/// The union of [IRIs](https://www.w3.org/TR/rdf11-concepts/#dfn-iri), [default graph name](https://www.w3.org/TR/rdf11-concepts/#dfn-default-graph) and [variables](https://www.w3.org/TR/sparql11-query/#sparqlQueryVariables).
#[derive(Eq, PartialEq, Debug, Clone, Hash)]
pub enum GraphNamePattern {
NamedNode(NamedNode),
DefaultGraph,
Variable(Variable),
}
impl GraphNamePattern {
/// Formats using the [SPARQL S-Expression syntax](https://jena.apache.org/documentation/notes/sse.html).
pub(crate) fn fmt_sse(&self, f: &mut impl Write) -> fmt::Result {
match self {
Self::NamedNode(node) => write!(f, "{node}"),
Self::DefaultGraph => write!(f, "default"),
Self::Variable(var) => write!(f, "{var}"),
}
}
}
impl fmt::Display for GraphNamePattern {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Self::NamedNode(node) => node.fmt(f),
Self::DefaultGraph => write!(f, "DEFAULT"),
Self::Variable(var) => var.fmt(f),
}
}
}
impl From<NamedNode> for GraphNamePattern {
#[inline]
fn from(node: NamedNode) -> Self {
Self::NamedNode(node)
}
}
impl From<Variable> for GraphNamePattern {
#[inline]
fn from(var: Variable) -> Self {
Self::Variable(var)
}
}
impl From<GraphName> for GraphNamePattern {
#[inline]
fn from(graph_name: GraphName) -> Self {
match graph_name {
GraphName::NamedNode(node) => node.into(),
GraphName::DefaultGraph => Self::DefaultGraph,
}
}
}
impl From<NamedNodePattern> for GraphNamePattern {
#[inline]
fn from(graph_name: NamedNodePattern) -> Self {
match graph_name {
NamedNodePattern::NamedNode(node) => node.into(),
NamedNodePattern::Variable(var) => var.into(),
}
}
}
/// A [triple pattern](https://www.w3.org/TR/sparql11-query/#defn_TriplePattern)
#[derive(Eq, PartialEq, Debug, Clone, Hash)]
pub struct TriplePattern {
pub subject: TermPattern,
pub predicate: NamedNodePattern,
pub object: TermPattern,
}
impl TriplePattern {
pub(crate) fn new(
subject: impl Into<TermPattern>,
predicate: impl Into<NamedNodePattern>,
object: impl Into<TermPattern>,
) -> Self {
Self {
subject: subject.into(),
predicate: predicate.into(),
object: object.into(),
}
}
/// Formats using the [SPARQL S-Expression syntax](https://jena.apache.org/documentation/notes/sse.html).
pub(crate) fn fmt_sse(&self, f: &mut impl Write) -> fmt::Result {
write!(f, "(triple ")?;
self.subject.fmt_sse(f)?;
write!(f, " ")?;
self.predicate.fmt_sse(f)?;
write!(f, " ")?;
self.object.fmt_sse(f)?;
write!(f, ")")
}
}
impl fmt::Display for TriplePattern {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{} {} {}", self.subject, self.predicate, self.object)
}
}
impl From<Triple> for TriplePattern {
#[inline]
fn from(triple: Triple) -> Self {
Self {
subject: triple.subject.into(),
predicate: triple.predicate.into(),
object: triple.object.into(),
}
}
}
impl TryFrom<TriplePattern> for Triple {
type Error = ();
#[inline]
fn try_from(triple: TriplePattern) -> Result<Self, ()> {
Ok(Self {
subject: triple.subject.try_into()?,
predicate: triple.predicate.try_into()?,
object: triple.object.try_into()?,
})
}
}
/// A [triple pattern](https://www.w3.org/TR/sparql11-query/#defn_TriplePattern) without blank nodes.
#[derive(Eq, PartialEq, Debug, Clone, Hash)]
pub struct GroundTriplePattern {
pub subject: GroundTermPattern,
pub predicate: NamedNodePattern,
pub object: GroundTermPattern,
}
impl GroundTriplePattern {
/// Formats using the [SPARQL S-Expression syntax](https://jena.apache.org/documentation/notes/sse.html).
#[allow(dead_code)]
pub(crate) fn fmt_sse(&self, f: &mut impl Write) -> fmt::Result {
write!(f, "(triple ")?;
self.subject.fmt_sse(f)?;
write!(f, " ")?;
self.predicate.fmt_sse(f)?;
write!(f, " ")?;
self.object.fmt_sse(f)?;
write!(f, ")")
}
}
impl fmt::Display for GroundTriplePattern {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{} {} {}", self.subject, self.predicate, self.object)
}
}
impl From<GroundTriple> for GroundTriplePattern {
#[inline]
fn from(triple: GroundTriple) -> Self {
Self {
subject: triple.subject.into(),
predicate: triple.predicate.into(),
object: triple.object.into(),
}
}
}
impl TryFrom<TriplePattern> for GroundTriplePattern {
type Error = ();
#[inline]
fn try_from(triple: TriplePattern) -> Result<Self, Self::Error> {
Ok(Self {
subject: triple.subject.try_into()?,
predicate: triple.predicate,
object: triple.object.try_into()?,
})
}
}
/// A [triple pattern](https://www.w3.org/TR/sparql11-query/#defn_TriplePattern) in a specific graph
#[derive(Eq, PartialEq, Debug, Clone, Hash)]
pub struct QuadPattern {
pub subject: TermPattern,
pub predicate: NamedNodePattern,
pub object: TermPattern,
pub graph_name: GraphNamePattern,
}
impl QuadPattern {
pub(crate) fn new(
subject: impl Into<TermPattern>,
predicate: impl Into<NamedNodePattern>,
object: impl Into<TermPattern>,
graph_name: impl Into<GraphNamePattern>,
) -> Self {
Self {
subject: subject.into(),
predicate: predicate.into(),
object: object.into(),
graph_name: graph_name.into(),
}
}
/// Formats using the [SPARQL S-Expression syntax](https://jena.apache.org/documentation/notes/sse.html).
pub(crate) fn fmt_sse(&self, f: &mut impl Write) -> fmt::Result {
if self.graph_name != GraphNamePattern::DefaultGraph {
write!(f, "(graph ")?;
self.graph_name.fmt_sse(f)?;
write!(f, " (")?;
}
write!(f, "(triple ")?;
self.subject.fmt_sse(f)?;
write!(f, " ")?;
self.predicate.fmt_sse(f)?;
write!(f, " ")?;
self.object.fmt_sse(f)?;
write!(f, ")")?;
if self.graph_name != GraphNamePattern::DefaultGraph {
write!(f, "))")?;
}
Ok(())
}
}
impl fmt::Display for QuadPattern {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
if self.graph_name == GraphNamePattern::DefaultGraph {
write!(f, "{} {} {}", self.subject, self.predicate, self.object)
} else {
write!(
f,
"GRAPH {} {{ {} {} {} }}",
self.graph_name, self.subject, self.predicate, self.object
)
}
}
}
/// A [triple pattern](https://www.w3.org/TR/sparql11-query/#defn_TriplePattern) in a specific graph without blank nodes.
#[derive(Eq, PartialEq, Debug, Clone, Hash)]
pub struct GroundQuadPattern {
pub subject: GroundTermPattern,
pub predicate: NamedNodePattern,
pub object: GroundTermPattern,
pub graph_name: GraphNamePattern,
}
impl GroundQuadPattern {
/// Formats using the [SPARQL S-Expression syntax](https://jena.apache.org/documentation/notes/sse.html).
pub(crate) fn fmt_sse(&self, f: &mut impl Write) -> fmt::Result {
if self.graph_name != GraphNamePattern::DefaultGraph {
write!(f, "(graph ")?;
self.graph_name.fmt_sse(f)?;
write!(f, " (")?;
}
write!(f, "(triple ")?;
self.subject.fmt_sse(f)?;
write!(f, " ")?;
self.predicate.fmt_sse(f)?;
write!(f, " ")?;
self.object.fmt_sse(f)?;
write!(f, ")")?;
if self.graph_name != GraphNamePattern::DefaultGraph {
write!(f, "))")?;
}
Ok(())
}
}
impl fmt::Display for GroundQuadPattern {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
if self.graph_name == GraphNamePattern::DefaultGraph {
write!(f, "{} {} {}", self.subject, self.predicate, self.object)
} else {
write!(
f,
"GRAPH {} {{ {} {} {} }}",
self.graph_name, self.subject, self.predicate, self.object
)
}
}
}
impl TryFrom<QuadPattern> for GroundQuadPattern {
type Error = ();
#[inline]
fn try_from(pattern: QuadPattern) -> Result<Self, ()> {
Ok(Self {
subject: pattern.subject.try_into()?,
predicate: pattern.predicate,
object: pattern.object.try_into()?,
graph_name: pattern.graph_name,
})
}
}