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Makes sparesults parser API closer to oxrdfio

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pull/635/head
Tpt 1 year ago committed by Thomas Tanon
parent 7a3e07d98d
commit 412ca37b3c
7 changed files with 72 additions and 60 deletions
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  1. 16
      fuzz/src/result_format.rs
  2. 8
      lib/sparesults/README.md
  3. 2
      lib/sparesults/src/lib.rs
  4. 63
      lib/sparesults/src/parser.rs
  5. 18
      lib/src/sparql/model.rs
  6. 14
      lib/src/sparql/results.rs
  7. 11
      python/src/sparql.rs

16
fuzz/src/result_format.rs
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@ -1,17 +1,17 @@
use anyhow::Context; use anyhow::Context;
use sparesults::{ use sparesults::{
QueryResultsFormat, QueryResultsParser, QueryResultsReader, QueryResultsSerializer, FromReadQueryResultsReader, QueryResultsFormat, QueryResultsParser, QueryResultsSerializer,
}; };
pub fn fuzz_result_format(format: QueryResultsFormat, data: &[u8]) { pub fn fuzz_result_format(format: QueryResultsFormat, data: &[u8]) {
let parser = QueryResultsParser::from_format(format); let parser = QueryResultsParser::from_format(format);
let serializer = QueryResultsSerializer::from_format(format); let serializer = QueryResultsSerializer::from_format(format);
let Ok(reader) = parser.read_results(data) else { let Ok(reader) = parser.parse_read(data) else {
return; return;
}; };
match reader { match reader {
QueryResultsReader::Solutions(solutions) => { FromReadQueryResultsReader::Solutions(solutions) => {
let Ok(solutions) = solutions.collect::<Result<Vec<_>, _>>() else { let Ok(solutions) = solutions.collect::<Result<Vec<_>, _>>() else {
return; return;
}; };
@ -31,8 +31,8 @@ pub fn fuzz_result_format(format: QueryResultsFormat, data: &[u8]) {
let serialized = String::from_utf8(writer.finish().unwrap()).unwrap(); let serialized = String::from_utf8(writer.finish().unwrap()).unwrap();
// And to parse again // And to parse again
if let QueryResultsReader::Solutions(roundtrip_solutions) = parser if let FromReadQueryResultsReader::Solutions(roundtrip_solutions) = parser
.read_results(serialized.as_bytes()) .parse_read(serialized.as_bytes())
.with_context(|| format!("Parsing {:?}", &serialized)) .with_context(|| format!("Parsing {:?}", &serialized))
.unwrap() .unwrap()
{ {
@ -45,7 +45,7 @@ pub fn fuzz_result_format(format: QueryResultsFormat, data: &[u8]) {
) )
} }
} }
QueryResultsReader::Boolean(value) => { FromReadQueryResultsReader::Boolean(value) => {
// We try to write again // We try to write again
let mut serialized = Vec::new(); let mut serialized = Vec::new();
serializer serializer
@ -53,8 +53,8 @@ pub fn fuzz_result_format(format: QueryResultsFormat, data: &[u8]) {
.unwrap(); .unwrap();
// And to parse again // And to parse again
if let QueryResultsReader::Boolean(roundtrip_value) = if let FromReadQueryResultsReader::Boolean(roundtrip_value) =
parser.read_results(serialized.as_slice()).unwrap() parser.parse_read(serialized.as_slice()).unwrap()
{ {
assert_eq!(roundtrip_value, value) assert_eq!(roundtrip_value, value)
} }

8
lib/sparesults/README.md
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@ -18,19 +18,19 @@ This crate is intended to be a building piece for SPARQL client and server imple
Usage example converting a JSON result file into a TSV result file: Usage example converting a JSON result file into a TSV result file:
```rust ```rust
use sparesults::{QueryResultsFormat, QueryResultsParser, QueryResultsReader, QueryResultsSerializer}; use sparesults::{QueryResultsFormat, QueryResultsParser, FromReadQueryResultsReader, QueryResultsSerializer};
use std::io::Result; use std::io::Result;
fn convert_json_to_tsv(json_file: &[u8]) -> Result<Vec<u8>> { fn convert_json_to_tsv(json_file: &[u8]) -> Result<Vec<u8>> {
let json_parser = QueryResultsParser::from_format(QueryResultsFormat::Json); let json_parser = QueryResultsParser::from_format(QueryResultsFormat::Json);
let tsv_serializer = QueryResultsSerializer::from_format(QueryResultsFormat::Tsv); let tsv_serializer = QueryResultsSerializer::from_format(QueryResultsFormat::Tsv);
// We start to read the JSON file and see which kind of results it is // We start to read the JSON file and see which kind of results it is
match json_parser.read_results(json_file)? { match json_parser.parse_read(json_file)? {
QueryResultsReader::Boolean(value) => { FromReadQueryResultsReader::Boolean(value) => {
// it's a boolean result, we copy it in TSV to the output buffer // it's a boolean result, we copy it in TSV to the output buffer
tsv_serializer.serialize_boolean_to_write(Vec::new(), value) tsv_serializer.serialize_boolean_to_write(Vec::new(), value)
}, },
QueryResultsReader::Solutions(solutions_reader) => { FromReadQueryResultsReader::Solutions(solutions_reader) => {
// it's a set of solutions, we create a writer and we write to it while reading in streaming from the JSON file // it's a set of solutions, we create a writer and we write to it while reading in streaming from the JSON file
let mut serialize_solutions_to_write = tsv_serializer.serialize_solutions_to_write(Vec::new(), solutions_reader.variables().to_vec())?; let mut serialize_solutions_to_write = tsv_serializer.serialize_solutions_to_write(Vec::new(), solutions_reader.variables().to_vec())?;
for solution in solutions_reader { for solution in solutions_reader {

2
lib/sparesults/src/lib.rs
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@ -15,6 +15,6 @@ mod xml;
pub use crate::error::{ParseError, SyntaxError}; pub use crate::error::{ParseError, SyntaxError};
pub use crate::format::QueryResultsFormat; pub use crate::format::QueryResultsFormat;
pub use crate::parser::{QueryResultsParser, QueryResultsReader, SolutionsReader}; pub use crate::parser::{FromReadQueryResultsReader, FromReadSolutionsReader, QueryResultsParser};
pub use crate::serializer::{QueryResultsSerializer, ToWriteSolutionsWriter}; pub use crate::serializer::{QueryResultsSerializer, ToWriteSolutionsWriter};
pub use crate::solution::QuerySolution; pub use crate::solution::QuerySolution;

63
lib/sparesults/src/parser.rs
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@ -17,16 +17,16 @@ use std::rc::Rc;
/// ///
/// Example in JSON (the API is the same for XML and TSV): /// Example in JSON (the API is the same for XML and TSV):
/// ``` /// ```
/// use sparesults::{QueryResultsFormat, QueryResultsParser, QueryResultsReader}; /// use sparesults::{QueryResultsFormat, QueryResultsParser, FromReadQueryResultsReader};
/// use oxrdf::{Literal, Variable}; /// use oxrdf::{Literal, Variable};
/// ///
/// let json_parser = QueryResultsParser::from_format(QueryResultsFormat::Json); /// let json_parser = QueryResultsParser::from_format(QueryResultsFormat::Json);
/// // boolean /// // boolean
/// if let QueryResultsReader::Boolean(v) = json_parser.read_results(b"{\"boolean\":true}".as_slice())? { /// if let FromReadQueryResultsReader::Boolean(v) = json_parser.parse_read(b"{\"boolean\":true}".as_slice())? {
/// assert_eq!(v, true); /// assert_eq!(v, true);
/// } /// }
/// // solutions /// // solutions
/// if let QueryResultsReader::Solutions(solutions) = json_parser.read_results(b"{\"head\":{\"vars\":[\"foo\",\"bar\"]},\"results\":{\"bindings\":[{\"foo\":{\"type\":\"literal\",\"value\":\"test\"}}]}}".as_slice())? { /// if let FromReadQueryResultsReader::Solutions(solutions) = json_parser.parse_read(b"{\"head\":{\"vars\":[\"foo\",\"bar\"]},\"results\":{\"bindings\":[{\"foo\":{\"type\":\"literal\",\"value\":\"test\"}}]}}".as_slice())? {
/// assert_eq!(solutions.variables(), &[Variable::new_unchecked("foo"), Variable::new_unchecked("bar")]); /// assert_eq!(solutions.variables(), &[Variable::new_unchecked("foo"), Variable::new_unchecked("bar")]);
/// for solution in solutions { /// for solution in solutions {
/// assert_eq!(solution?.iter().collect::<Vec<_>>(), vec![(&Variable::new_unchecked("foo"), &Literal::from("test").into())]); /// assert_eq!(solution?.iter().collect::<Vec<_>>(), vec![(&Variable::new_unchecked("foo"), &Literal::from("test").into())]);
@ -49,18 +49,18 @@ impl QueryResultsParser {
/// ///
/// Example in XML (the API is the same for JSON and TSV): /// Example in XML (the API is the same for JSON and TSV):
/// ``` /// ```
/// use sparesults::{QueryResultsFormat, QueryResultsParser, QueryResultsReader}; /// use sparesults::{QueryResultsFormat, QueryResultsParser, FromReadQueryResultsReader};
/// use oxrdf::{Literal, Variable}; /// use oxrdf::{Literal, Variable};
/// ///
/// let json_parser = QueryResultsParser::from_format(QueryResultsFormat::Xml); /// let json_parser = QueryResultsParser::from_format(QueryResultsFormat::Xml);
/// ///
/// // boolean /// // boolean
/// if let QueryResultsReader::Boolean(v) = json_parser.read_results(b"<sparql xmlns=\"http://www.w3.org/2005/sparql-results#\"><head/><boolean>true</boolean></sparql>".as_slice())? { /// if let FromReadQueryResultsReader::Boolean(v) = json_parser.parse_read(b"<sparql xmlns=\"http://www.w3.org/2005/sparql-results#\"><head/><boolean>true</boolean></sparql>".as_slice())? {
/// assert_eq!(v, true); /// assert_eq!(v, true);
/// } /// }
/// ///
/// // solutions /// // solutions
/// if let QueryResultsReader::Solutions(solutions) = json_parser.read_results(b"<sparql xmlns=\"http://www.w3.org/2005/sparql-results#\"><head><variable name=\"foo\"/><variable name=\"bar\"/></head><results><result><binding name=\"foo\"><literal>test</literal></binding></result></results></sparql>".as_slice())? { /// if let FromReadQueryResultsReader::Solutions(solutions) = json_parser.parse_read(b"<sparql xmlns=\"http://www.w3.org/2005/sparql-results#\"><head><variable name=\"foo\"/><variable name=\"bar\"/></head><results><result><binding name=\"foo\"><literal>test</literal></binding></result></results></sparql>".as_slice())? {
/// assert_eq!(solutions.variables(), &[Variable::new_unchecked("foo"), Variable::new_unchecked("bar")]); /// assert_eq!(solutions.variables(), &[Variable::new_unchecked("foo"), Variable::new_unchecked("bar")]);
/// for solution in solutions { /// for solution in solutions {
/// assert_eq!(solution?.iter().collect::<Vec<_>>(), vec![(&Variable::new_unchecked("foo"), &Literal::from("test").into())]); /// assert_eq!(solution?.iter().collect::<Vec<_>>(), vec![(&Variable::new_unchecked("foo"), &Literal::from("test").into())]);
@ -68,61 +68,72 @@ impl QueryResultsParser {
/// } /// }
/// # Result::<(),sparesults::ParseError>::Ok(()) /// # Result::<(),sparesults::ParseError>::Ok(())
/// ``` /// ```
pub fn read_results<R: BufRead>(&self, reader: R) -> Result<QueryResultsReader<R>, ParseError> { pub fn parse_read<R: BufRead>(
&self,
reader: R,
) -> Result<FromReadQueryResultsReader<R>, ParseError> {
Ok(match self.format { Ok(match self.format {
QueryResultsFormat::Xml => match XmlQueryResultsReader::read(reader)? { QueryResultsFormat::Xml => match XmlQueryResultsReader::read(reader)? {
XmlQueryResultsReader::Boolean(r) => QueryResultsReader::Boolean(r), XmlQueryResultsReader::Boolean(r) => FromReadQueryResultsReader::Boolean(r),
XmlQueryResultsReader::Solutions { XmlQueryResultsReader::Solutions {
solutions, solutions,
variables, variables,
} => QueryResultsReader::Solutions(SolutionsReader { } => FromReadQueryResultsReader::Solutions(FromReadSolutionsReader {
variables: Rc::new(variables), variables: Rc::new(variables),
solutions: SolutionsReaderKind::Xml(solutions), solutions: SolutionsReaderKind::Xml(solutions),
}), }),
}, },
QueryResultsFormat::Json => match JsonQueryResultsReader::read(reader)? { QueryResultsFormat::Json => match JsonQueryResultsReader::read(reader)? {
JsonQueryResultsReader::Boolean(r) => QueryResultsReader::Boolean(r), JsonQueryResultsReader::Boolean(r) => FromReadQueryResultsReader::Boolean(r),
JsonQueryResultsReader::Solutions { JsonQueryResultsReader::Solutions {
solutions, solutions,
variables, variables,
} => QueryResultsReader::Solutions(SolutionsReader { } => FromReadQueryResultsReader::Solutions(FromReadSolutionsReader {
variables: Rc::new(variables), variables: Rc::new(variables),
solutions: SolutionsReaderKind::Json(solutions), solutions: SolutionsReaderKind::Json(solutions),
}), }),
}, },
QueryResultsFormat::Csv => return Err(SyntaxError::msg("CSV SPARQL results syntax is lossy and can't be parsed to a proper RDF representation").into()), QueryResultsFormat::Csv => return Err(SyntaxError::msg("CSV SPARQL results syntax is lossy and can't be parsed to a proper RDF representation").into()),
QueryResultsFormat::Tsv => match TsvQueryResultsReader::read(reader)? { QueryResultsFormat::Tsv => match TsvQueryResultsReader::read(reader)? {
TsvQueryResultsReader::Boolean(r) => QueryResultsReader::Boolean(r), TsvQueryResultsReader::Boolean(r) => FromReadQueryResultsReader::Boolean(r),
TsvQueryResultsReader::Solutions { TsvQueryResultsReader::Solutions {
solutions, solutions,
variables, variables,
} => QueryResultsReader::Solutions(SolutionsReader { } => FromReadQueryResultsReader::Solutions(FromReadSolutionsReader {
variables: Rc::new(variables), variables: Rc::new(variables),
solutions: SolutionsReaderKind::Tsv(solutions), solutions: SolutionsReaderKind::Tsv(solutions),
}), }),
}, },
}) })
} }
#[deprecated(note = "Use parse_read")]
pub fn read_results<R: BufRead>(
&self,
reader: R,
) -> Result<FromReadQueryResultsReader<R>, ParseError> {
self.parse_read(reader)
}
} }
/// The reader for a given read of a results file. /// The reader for a given read of a results file.
/// ///
/// It is either a read boolean ([`bool`]) or a streaming reader of a set of solutions ([`SolutionsReader`]). /// It is either a read boolean ([`bool`]) or a streaming reader of a set of solutions ([`FromReadSolutionsReader`]).
/// ///
/// Example in TSV (the API is the same for JSON and XML): /// Example in TSV (the API is the same for JSON and XML):
/// ``` /// ```
/// use sparesults::{QueryResultsFormat, QueryResultsParser, QueryResultsReader}; /// use sparesults::{QueryResultsFormat, QueryResultsParser, FromReadQueryResultsReader};
/// use oxrdf::{Literal, Variable}; /// use oxrdf::{Literal, Variable};
/// ///
/// let json_parser = QueryResultsParser::from_format(QueryResultsFormat::Tsv); /// let json_parser = QueryResultsParser::from_format(QueryResultsFormat::Tsv);
/// ///
/// // boolean /// // boolean
/// if let QueryResultsReader::Boolean(v) = json_parser.read_results(b"true".as_slice())? { /// if let FromReadQueryResultsReader::Boolean(v) = json_parser.parse_read(b"true".as_slice())? {
/// assert_eq!(v, true); /// assert_eq!(v, true);
/// } /// }
/// ///
/// // solutions /// // solutions
/// if let QueryResultsReader::Solutions(solutions) = json_parser.read_results(b"?foo\t?bar\n\"test\"\t".as_slice())? { /// if let FromReadQueryResultsReader::Solutions(solutions) = json_parser.parse_read(b"?foo\t?bar\n\"test\"\t".as_slice())? {
/// assert_eq!(solutions.variables(), &[Variable::new_unchecked("foo"), Variable::new_unchecked("bar")]); /// assert_eq!(solutions.variables(), &[Variable::new_unchecked("foo"), Variable::new_unchecked("bar")]);
/// for solution in solutions { /// for solution in solutions {
/// assert_eq!(solution?.iter().collect::<Vec<_>>(), vec![(&Variable::new_unchecked("foo"), &Literal::from("test").into())]); /// assert_eq!(solution?.iter().collect::<Vec<_>>(), vec![(&Variable::new_unchecked("foo"), &Literal::from("test").into())]);
@ -130,8 +141,8 @@ impl QueryResultsParser {
/// } /// }
/// # Result::<(),sparesults::ParseError>::Ok(()) /// # Result::<(),sparesults::ParseError>::Ok(())
/// ``` /// ```
pub enum QueryResultsReader<R: BufRead> { pub enum FromReadQueryResultsReader<R: BufRead> {
Solutions(SolutionsReader<R>), Solutions(FromReadSolutionsReader<R>),
Boolean(bool), Boolean(bool),
} }
@ -141,11 +152,11 @@ pub enum QueryResultsReader<R: BufRead> {
/// ///
/// Example in JSON (the API is the same for XML and TSV): /// Example in JSON (the API is the same for XML and TSV):
/// ``` /// ```
/// use sparesults::{QueryResultsFormat, QueryResultsParser, QueryResultsReader}; /// use sparesults::{QueryResultsFormat, QueryResultsParser, FromReadQueryResultsReader};
/// use oxrdf::{Literal, Variable}; /// use oxrdf::{Literal, Variable};
/// ///
/// let json_parser = QueryResultsParser::from_format(QueryResultsFormat::Json); /// let json_parser = QueryResultsParser::from_format(QueryResultsFormat::Json);
/// if let QueryResultsReader::Solutions(solutions) = json_parser.read_results(b"{\"head\":{\"vars\":[\"foo\",\"bar\"]},\"results\":{\"bindings\":[{\"foo\":{\"type\":\"literal\",\"value\":\"test\"}}]}}".as_slice())? { /// if let FromReadQueryResultsReader::Solutions(solutions) = json_parser.parse_read(b"{\"head\":{\"vars\":[\"foo\",\"bar\"]},\"results\":{\"bindings\":[{\"foo\":{\"type\":\"literal\",\"value\":\"test\"}}]}}".as_slice())? {
/// assert_eq!(solutions.variables(), &[Variable::new_unchecked("foo"), Variable::new_unchecked("bar")]); /// assert_eq!(solutions.variables(), &[Variable::new_unchecked("foo"), Variable::new_unchecked("bar")]);
/// for solution in solutions { /// for solution in solutions {
/// assert_eq!(solution?.iter().collect::<Vec<_>>(), vec![(&Variable::new_unchecked("foo"), &Literal::from("test").into())]); /// assert_eq!(solution?.iter().collect::<Vec<_>>(), vec![(&Variable::new_unchecked("foo"), &Literal::from("test").into())]);
@ -154,7 +165,7 @@ pub enum QueryResultsReader<R: BufRead> {
/// # Result::<(),sparesults::ParseError>::Ok(()) /// # Result::<(),sparesults::ParseError>::Ok(())
/// ``` /// ```
#[allow(clippy::rc_buffer)] #[allow(clippy::rc_buffer)]
pub struct SolutionsReader<R: BufRead> { pub struct FromReadSolutionsReader<R: BufRead> {
variables: Rc<Vec<Variable>>, variables: Rc<Vec<Variable>>,
solutions: SolutionsReaderKind<R>, solutions: SolutionsReaderKind<R>,
} }
@ -165,16 +176,16 @@ enum SolutionsReaderKind<R: BufRead> {
Tsv(TsvSolutionsReader<R>), Tsv(TsvSolutionsReader<R>),
} }
impl<R: BufRead> SolutionsReader<R> { impl<R: BufRead> FromReadSolutionsReader<R> {
/// Ordered list of the declared variables at the beginning of the results. /// Ordered list of the declared variables at the beginning of the results.
/// ///
/// Example in TSV (the API is the same for JSON and XML): /// Example in TSV (the API is the same for JSON and XML):
/// ``` /// ```
/// use sparesults::{QueryResultsFormat, QueryResultsParser, QueryResultsReader}; /// use sparesults::{QueryResultsFormat, QueryResultsParser, FromReadQueryResultsReader};
/// use oxrdf::Variable; /// use oxrdf::Variable;
/// ///
/// let json_parser = QueryResultsParser::from_format(QueryResultsFormat::Tsv); /// let json_parser = QueryResultsParser::from_format(QueryResultsFormat::Tsv);
/// if let QueryResultsReader::Solutions(solutions) = json_parser.read_results(b"?foo\t?bar\n\"ex1\"\t\"ex2\"".as_slice())? { /// if let FromReadQueryResultsReader::Solutions(solutions) = json_parser.parse_read(b"?foo\t?bar\n\"ex1\"\t\"ex2\"".as_slice())? {
/// assert_eq!(solutions.variables(), &[Variable::new_unchecked("foo"), Variable::new_unchecked("bar")]); /// assert_eq!(solutions.variables(), &[Variable::new_unchecked("foo"), Variable::new_unchecked("bar")]);
/// } /// }
/// # Result::<(),sparesults::ParseError>::Ok(()) /// # Result::<(),sparesults::ParseError>::Ok(())
@ -185,7 +196,7 @@ impl<R: BufRead> SolutionsReader<R> {
} }
} }
impl<R: BufRead> Iterator for SolutionsReader<R> { impl<R: BufRead> Iterator for FromReadSolutionsReader<R> {
type Item = Result<QuerySolution, ParseError>; type Item = Result<QuerySolution, ParseError>;
fn next(&mut self) -> Option<Result<QuerySolution, ParseError>> { fn next(&mut self) -> Option<Result<QuerySolution, ParseError>> {

18
lib/src/sparql/model.rs
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@ -2,8 +2,8 @@ use crate::io::{RdfFormat, RdfSerializer};
use crate::model::*; use crate::model::*;
use crate::sparql::error::EvaluationError; use crate::sparql::error::EvaluationError;
use crate::sparql::results::{ use crate::sparql::results::{
ParseError, QueryResultsFormat, QueryResultsParser, QueryResultsReader, QueryResultsSerializer, FromReadQueryResultsReader, FromReadSolutionsReader, ParseError, QueryResultsFormat,
SolutionsReader, QueryResultsParser, QueryResultsSerializer,
}; };
use oxrdf::{Variable, VariableRef}; use oxrdf::{Variable, VariableRef};
pub use sparesults::QuerySolution; pub use sparesults::QuerySolution;
@ -27,7 +27,7 @@ impl QueryResults {
format: QueryResultsFormat, format: QueryResultsFormat,
) -> Result<Self, ParseError> { ) -> Result<Self, ParseError> {
Ok(QueryResultsParser::from_format(format) Ok(QueryResultsParser::from_format(format)
.read_results(reader)? .parse_read(reader)?
.into()) .into())
} }
@ -150,11 +150,11 @@ impl From<QuerySolutionIter> for QueryResults {
} }
} }
impl<R: BufRead + 'static> From<QueryResultsReader<R>> for QueryResults { impl<R: BufRead + 'static> From<FromReadQueryResultsReader<R>> for QueryResults {
fn from(reader: QueryResultsReader<R>) -> Self { fn from(reader: FromReadQueryResultsReader<R>) -> Self {
match reader { match reader {
QueryResultsReader::Solutions(s) => Self::Solutions(s.into()), FromReadQueryResultsReader::Solutions(s) => Self::Solutions(s.into()),
QueryResultsReader::Boolean(v) => Self::Boolean(v), FromReadQueryResultsReader::Boolean(v) => Self::Boolean(v),
} }
} }
} }
@ -211,8 +211,8 @@ impl QuerySolutionIter {
} }
} }
impl<R: BufRead + 'static> From<SolutionsReader<R>> for QuerySolutionIter { impl<R: BufRead + 'static> From<FromReadSolutionsReader<R>> for QuerySolutionIter {
fn from(reader: SolutionsReader<R>) -> Self { fn from(reader: FromReadSolutionsReader<R>) -> Self {
Self { Self {
variables: Rc::new(reader.variables().to_vec()), variables: Rc::new(reader.variables().to_vec()),
iter: Box::new(reader.map(|t| t.map_err(EvaluationError::from))), iter: Box::new(reader.map(|t| t.map_err(EvaluationError::from))),

14
lib/src/sparql/results.rs
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@ -5,19 +5,19 @@
//! Usage example converting a JSON result file into a TSV result file: //! Usage example converting a JSON result file into a TSV result file:
//! //!
//! ``` //! ```
//! use oxigraph::sparql::results::{QueryResultsFormat, QueryResultsParser, QueryResultsReader, QueryResultsSerializer}; //! use oxigraph::sparql::results::{QueryResultsFormat, QueryResultsParser, FromReadQueryResultsReader, QueryResultsSerializer};
//! use std::io::Result; //! use std::io::Result;
//! //!
//! fn convert_json_to_tsv(json_file: &[u8]) -> Result<Vec<u8>> { //! fn convert_json_to_tsv(json_file: &[u8]) -> Result<Vec<u8>> {
//! let json_parser = QueryResultsParser::from_format(QueryResultsFormat::Json); //! let json_parser = QueryResultsParser::from_format(QueryResultsFormat::Json);
//! let tsv_serializer = QueryResultsSerializer::from_format(QueryResultsFormat::Tsv); //! let tsv_serializer = QueryResultsSerializer::from_format(QueryResultsFormat::Tsv);
//! // We start to read the JSON file and see which kind of results it is //! // We start to read the JSON file and see which kind of results it is
//! match json_parser.read_results(json_file)? { //! match json_parser.parse_read(json_file)? {
//! QueryResultsReader::Boolean(value) => { //! FromReadQueryResultsReader::Boolean(value) => {
//! // it's a boolean result, we copy it in TSV to the output buffer //! // it's a boolean result, we copy it in TSV to the output buffer
//! tsv_serializer.serialize_boolean_to_write(Vec::new(), value) //! tsv_serializer.serialize_boolean_to_write(Vec::new(), value)
//! }, //! }
//! QueryResultsReader::Solutions(solutions_reader) => { //! FromReadQueryResultsReader::Solutions(solutions_reader) => {
//! // it's a set of solutions, we create a writer and we write to it while reading in streaming from the JSON file //! // it's a set of solutions, we create a writer and we write to it while reading in streaming from the JSON file
//! let mut serialize_solutions_to_write = tsv_serializer.serialize_solutions_to_write(Vec::new(), solutions_reader.variables().to_vec())?; //! let mut serialize_solutions_to_write = tsv_serializer.serialize_solutions_to_write(Vec::new(), solutions_reader.variables().to_vec())?;
//! for solution in solutions_reader { //! for solution in solutions_reader {
@ -42,6 +42,6 @@
//! ``` //! ```
pub use sparesults::{ pub use sparesults::{
ParseError, QueryResultsFormat, QueryResultsParser, QueryResultsReader, QueryResultsSerializer, FromReadQueryResultsReader, FromReadSolutionsReader, ParseError, QueryResultsFormat,
SolutionsReader, SyntaxError, QueryResultsParser, QueryResultsSerializer, SyntaxError,
}; };

11
python/src/sparql.rs
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@ -4,7 +4,8 @@ use crate::store::map_storage_error;
use oxigraph::io::RdfSerializer; use oxigraph::io::RdfSerializer;
use oxigraph::model::Term; use oxigraph::model::Term;
use oxigraph::sparql::results::{ use oxigraph::sparql::results::{
ParseError, QueryResultsParser, QueryResultsReader, QueryResultsSerializer, SolutionsReader, FromReadQueryResultsReader, FromReadSolutionsReader, ParseError, QueryResultsParser,
QueryResultsSerializer,
}; };
use oxigraph::sparql::{ use oxigraph::sparql::{
EvaluationError, Query, QueryResults, QuerySolution, QuerySolutionIter, QueryTripleIter, EvaluationError, Query, QueryResults, QuerySolution, QuerySolutionIter, QueryTripleIter,
@ -189,7 +190,7 @@ pub struct PyQuerySolutions {
} }
enum PyQuerySolutionsVariant { enum PyQuerySolutionsVariant {
Query(QuerySolutionIter), Query(QuerySolutionIter),
Reader(SolutionsReader<BufReader<PyReadable>>), Reader(FromReadSolutionsReader<BufReader<PyReadable>>),
} }
#[pymethods] #[pymethods]
@ -496,14 +497,14 @@ pub fn parse_query_results(
PyReadable::from_data(input) PyReadable::from_data(input)
}; };
let results = QueryResultsParser::from_format(format) let results = QueryResultsParser::from_format(format)
.read_results(BufReader::new(input)) .parse_read(BufReader::new(input))
.map_err(map_query_results_parse_error)?; .map_err(map_query_results_parse_error)?;
Ok(match results { Ok(match results {
QueryResultsReader::Solutions(inner) => PyQuerySolutions { FromReadQueryResultsReader::Solutions(inner) => PyQuerySolutions {
inner: PyQuerySolutionsVariant::Reader(inner), inner: PyQuerySolutionsVariant::Reader(inner),
} }
.into_py(py), .into_py(py),
QueryResultsReader::Boolean(inner) => PyQueryBoolean { inner }.into_py(py), FromReadQueryResultsReader::Boolean(inner) => PyQueryBoolean { inner }.into_py(py),
}) })
} }

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