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Adds some useful term constructors

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pull/10/head
Tpt 6 years ago
parent 553386e354
commit e13b432ccf
3 changed files with 71 additions and 29 deletions
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  1. 53
      src/model/data.rs
  2. 26
      src/rio/ntriples/ntriples_grammar.rustpeg
  3. 21
      src/rio/turtle/turtle_grammar.rustpeg

53
src/model/data.rs
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@ -2,8 +2,10 @@
///! Inspired by [RDFjs](http://rdf.js.org/)
use std::fmt;
use std::option::Option;
use std::str::FromStr;
use std::sync::Arc;
use std::sync::Mutex;
use url::ParseError;
use url::Url;
/// A RDF [IRI](https://www.w3.org/TR/rdf11-concepts/#dfn-iri)
@ -28,6 +30,16 @@ impl fmt::Display for NamedNode {
}
}
impl FromStr for NamedNode {
type Err = ParseError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
Ok(NamedNode {
iri: Arc::new(Url::parse(s)?),
})
}
}
/// A RDF [blank node](https://www.w3.org/TR/rdf11-concepts/#dfn-blank-node)
#[derive(Eq, PartialEq, Debug, Clone, Hash)]
pub struct BlankNode {
@ -55,12 +67,12 @@ pub enum Literal {
}
lazy_static! {
static ref XSD_STRING: NamedNode = NamedNode {
iri: Arc::new(Url::parse("http://www.w3.org/2001/XMLSchema#string").unwrap())
};
static ref RDF_LANG_STRING: NamedNode = NamedNode {
iri: Arc::new(Url::parse("http://www.w3.org/1999/02/22-rdf-syntax-ns#langString").unwrap())
};
static ref XSD_BOOLEAN: NamedNode =
NamedNode::from_str("http://www.w3.org/2001/XMLSchema#boolean").unwrap();
static ref XSD_STRING: NamedNode =
NamedNode::from_str("http://www.w3.org/2001/XMLSchema#string").unwrap();
static ref RDF_LANG_STRING: NamedNode =
NamedNode::from_str("http://www.w3.org/1999/02/22-rdf-syntax-ns#langString").unwrap();
}
impl Literal {
@ -112,6 +124,35 @@ impl fmt::Display for Literal {
}
}
impl<'a> From<&'a str> for Literal {
fn from(value: &'a str) -> Self {
Literal::SimpleLiteral(value.into())
}
}
impl From<String> for Literal {
fn from(value: String) -> Self {
Literal::SimpleLiteral(value)
}
}
impl From<bool> for Literal {
fn from(value: bool) -> Self {
Literal::TypedLiteral {
value: value.to_string(),
datatype: XSD_BOOLEAN.clone(),
}
}
}
impl FromStr for Literal {
type Err = ();
fn from_str(s: &str) -> Result<Self, Self::Err> {
Ok(s.clone().into())
}
}
/// The union of [IRIs](https://www.w3.org/TR/rdf11-concepts/#dfn-iri) and [blank nodes](https://www.w3.org/TR/rdf11-concepts/#dfn-blank-node).
#[derive(Eq, PartialEq, Debug, Clone, Hash)]
pub enum NamedOrBlankNode {

26
src/rio/ntriples/ntriples_grammar.rustpeg
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@ -2,7 +2,7 @@
use std::iter::FromIterator;
use std::char;
use url::Url;
use std::str::FromStr;
use model::data::*;
#![arguments(data_factory: &DataFactory)]
@ -15,25 +15,25 @@ triple -> Option<Triple> =
//[3]
subject -> NamedOrBlankNode =
i: IRIREF { data_factory.named_node(i).into() } /
b: BLANK_NODE_LABEL { data_factory.blank_node(b).into() }
i: IRIREF { i.into() } /
b: BLANK_NODE_LABEL { b.into() }
//[4]
predicate -> NamedNode = i:IRIREF {
data_factory.named_node(i)
i
}
//[5]
object -> Term =
i: IRIREF { data_factory.named_node(i).into() } /
b: BLANK_NODE_LABEL { data_factory.blank_node(b).into() } /
i: IRIREF { i.into() } /
b: BLANK_NODE_LABEL { b.into() } /
l: literal { l.into() }
//[6]
literal -> Literal =
v: STRING_LITERAL_QUOTE _ "^^" _ t:IRIREF { data_factory.typed_literal(v, data_factory.named_node(t)) } /
v: STRING_LITERAL_QUOTE _ "^^" _ t:IRIREF { data_factory.typed_literal(v, t) } /
v: STRING_LITERAL_QUOTE _ l:LANGTAG { data_factory.language_tagged_literal(v, l) } /
v: STRING_LITERAL_QUOTE { data_factory.simple_literal(v) }
v: STRING_LITERAL_QUOTE { v.into() }
//[144s]
@ -45,10 +45,10 @@ LANGTAG -> &'input str = "@" l:$([a-zA-Z]+ ("-" [a-zA-Z0-9]+)*) {
EOL = [\r\n]+
//[8]
IRIREF -> Url = "<" _ i:((_IRIREF_simple_char / UCHAR)*) _ ">" {?
IRIREF -> NamedNode = "<" _ i:((_IRIREF_simple_char / UCHAR)*) _ ">" {?
let s = String::from_iter(i.into_iter());
match Url::parse(&s) {
Ok(url) => Ok(url),
match NamedNode::from_str(&s) {
Ok(named_node) => Ok(named_node),
Err(error) => Err("IRI parsing failed")
}
}
@ -61,8 +61,8 @@ STRING_LITERAL_QUOTE -> String = "\"" l:((STRING_LITERAL_QUOTE_simple_char / ECH
STRING_LITERAL_QUOTE_simple_char -> char = c: $([^\u{0022}\u{005c}\u{000a}\u{000d}]) { c.chars().next().unwrap() }
//[141s]
BLANK_NODE_LABEL -> &'input str = "_:" b:$(([0-9] / PN_CHARS_U) PN_CHARS* ("."+ PN_CHARS+)*) {
b
BLANK_NODE_LABEL -> BlankNode = "_:" b:$(([0-9] / PN_CHARS_U) PN_CHARS* ("."+ PN_CHARS+)*) {
data_factory.blank_node(b)
}
//[10]

21
src/rio/turtle/turtle_grammar.rustpeg
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@ -3,6 +3,7 @@
use std::char;
use url::Url;
use model::data::*;
use std::str::FromStr;
use std::iter;
use rio::turtle::ParserState;
@ -70,7 +71,7 @@ objectList -> () = object _ ("," _ object _)*
//[9]
verb -> NamedNode = predicate /
"a" { data_factory.named_node(Url::parse("http://www.w3.org/1999/02/22-rdf-syntax-ns#type").unwrap()) }
"a" { NamedNode::from_str("http://www.w3.org/1999/02/22-rdf-syntax-ns#type").unwrap() }
// [10]
subject -> NamedOrBlankNode =
@ -115,9 +116,9 @@ blankNodePropertyList_open -> () = "[" {
//[15]
collection -> NamedOrBlankNode = '(' _ o:(collection_value*) ')' {
let first = data_factory.named_node(Url::parse("http://www.w3.org/1999/02/22-rdf-syntax-ns#first").unwrap());
let rest = data_factory.named_node(Url::parse("http://www.w3.org/1999/02/22-rdf-syntax-ns#rest").unwrap());
let mut current_list_node = NamedOrBlankNode::from(data_factory.named_node(Url::parse("http://www.w3.org/1999/02/22-rdf-syntax-ns#nil").unwrap()));
let first = NamedNode::from_str("http://www.w3.org/1999/02/22-rdf-syntax-ns#first").unwrap();
let rest = NamedNode::from_str("http://www.w3.org/1999/02/22-rdf-syntax-ns#rest").unwrap();
let mut current_list_node = NamedOrBlankNode::from(NamedNode::from_str("http://www.w3.org/1999/02/22-rdf-syntax-ns#nil").unwrap());
for obj in o.into_iter().rev() {
let new_blank_node = NamedOrBlankNode::from(data_factory.new_blank_node());
buffer.push(data_factory.triple(new_blank_node.clone(), first.clone(), obj));
@ -130,20 +131,20 @@ collection_value -> Term = o:object_value _ { o }
//[16]
NumericLiteral -> Literal =
d:$(DOUBLE) { data_factory.typed_literal(d, data_factory.named_node(Url::parse("http://www.w3.org/2001/XMLSchema#double").unwrap())) } /
d:$(DECIMAL) { data_factory.typed_literal(d, data_factory.named_node(Url::parse("http://www.w3.org/2001/XMLSchema#decimal").unwrap())) } /
i:$(INTEGER) { data_factory.typed_literal(i, data_factory.named_node(Url::parse("http://www.w3.org/2001/XMLSchema#integer").unwrap())) }
d:$(DOUBLE) { data_factory.typed_literal(d, NamedNode::from_str("http://www.w3.org/2001/XMLSchema#double").unwrap()) } /
d:$(DECIMAL) { data_factory.typed_literal(d, NamedNode::from_str("http://www.w3.org/2001/XMLSchema#decimal").unwrap()) } /
i:$(INTEGER) { data_factory.typed_literal(i, NamedNode::from_str("http://www.w3.org/2001/XMLSchema#integer").unwrap()) }
//[128s]
RDFLiteral -> Literal =
v:String _ "^^" _ t:iri { data_factory.typed_literal(v, t) } /
v:String _ l:LANGTAG { data_factory.language_tagged_literal(v, l) } /
v:String { data_factory.simple_literal(v) }
v:String { v.into() }
//[133s]
BooleanLiteral -> Literal =
"true" { data_factory.typed_literal("true", data_factory.named_node(Url::parse("http://www.w3.org/2001/XMLSchema#boolean").unwrap())) } /
"false" { data_factory.typed_literal("false", data_factory.named_node(Url::parse("http://www.w3.org/2001/XMLSchema#boolean").unwrap())) }
"true" { true.into() } /
"false" { false.into() }
//[17]
String -> String = STRING_LITERAL_LONG_SINGLE_QUOTE / STRING_LITERAL_LONG_QUOTE / STRING_LITERAL_QUOTE / STRING_LITERAL_SINGLE_QUOTE

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