Makes RepositoryConnection.prepare_query take &str instead of Read

Simpler and faster API (SPARQL parser was reading into a String anyway)

lib/src/lib.rs

@@ -27,7 +27,7 @@
 //! assert_eq!(vec![quad], results.unwrap());
 //!
 //! // SPARQL query
-//! let prepared_query = connection.prepare_query("SELECT ?s WHERE { ?s ?p ?o }".as_bytes()).unwrap();
+//! let prepared_query = connection.prepare_query("SELECT ?s WHERE { ?s ?p ?o }").unwrap();
 //! let results = prepared_query.exec().unwrap();
 //! if let QueryResult::Bindings(results) = results {
 //!     assert_eq!(results.into_values_iter().next().unwrap().unwrap()[0], Some(ex.into()));

lib/src/repository.rs

@@ -1,7 +1,7 @@
 use crate::model::*;
 use crate::sparql::PreparedQuery;
 use crate::{DatasetSyntax, GraphSyntax, Result};
-use std::io::{BufRead, Read};
+use std::io::BufRead;
 
 /// A `Repository` stores a [RDF dataset](https://www.w3.org/TR/rdf11-concepts/#dfn-rdf-dataset)
 /// and allows to query and update it using SPARQL.
@@ -30,7 +30,7 @@ use std::io::{BufRead, Read};
 /// assert_eq!(vec![quad], results.unwrap());
 ///
 /// // SPARQL query
-/// let prepared_query = connection.prepare_query("SELECT ?s WHERE { ?s ?p ?o }".as_bytes()).unwrap();
+/// let prepared_query = connection.prepare_query("SELECT ?s WHERE { ?s ?p ?o }").unwrap();
 /// let results = prepared_query.exec().unwrap();
 /// if let QueryResult::Bindings(results) = results {
 ///     assert_eq!(results.into_values_iter().next().unwrap().unwrap()[0], Some(ex.into()));
@@ -75,13 +75,13 @@ pub trait RepositoryConnection: Clone {
     /// connection.insert(&Quad::new(ex.clone(), ex.clone(), ex.clone(), None));
     ///
     /// // SPARQL query
-    /// let prepared_query = connection.prepare_query("SELECT ?s WHERE { ?s ?p ?o }".as_bytes()).unwrap();
+    /// let prepared_query = connection.prepare_query("SELECT ?s WHERE { ?s ?p ?o }").unwrap();
     /// let results = prepared_query.exec().unwrap();
     /// if let QueryResult::Bindings(results) = results {
     ///     assert_eq!(results.into_values_iter().next().unwrap().unwrap()[0], Some(ex.into()));
     /// }
     /// ```
-    fn prepare_query(&self, query: impl Read) -> Result<Self::PreparedQuery>;
+    fn prepare_query(&self, query: &str) -> Result<Self::PreparedQuery>;
 
     /// Retrieves quads with a filter on each quad component
     ///

lib/src/sparql/mod.rs

@@ -17,7 +17,6 @@ use crate::sparql::plan_builder::PlanBuilder;
 use crate::store::StoreConnection;
 use crate::Result;
 use std::fmt;
-use std::io::Read;
 
 pub use crate::sparql::model::BindingsIterator;
 pub use crate::sparql::model::QueryResult;
@@ -55,7 +54,7 @@ enum SimplePreparedQueryOptions<S: StoreConnection> {
 }
 
 impl<S: StoreConnection> SimplePreparedQuery<S> {
-    pub(crate) fn new(connection: S, query: impl Read) -> Result<Self> {
+    pub(crate) fn new(connection: S, query: &str) -> Result<Self> {
         Ok(Self(match read_sparql_query(query, None)? {
             QueryVariants::Select {
                 algebra,
@@ -143,7 +142,7 @@ impl fmt::Display for Query {
 
 impl Query {
     /// Parses a SPARQL query
-    pub fn read<'a>(reader: impl Read + 'a, base_iri: Option<&'a str>) -> Result<Self> {
-        Ok(Query(read_sparql_query(reader, base_iri)?))
+    pub fn parse(query: &str, base_iri: Option<&str>) -> Result<Self> {
+        Ok(Query(read_sparql_query(query, base_iri)?))
     }
 }

lib/src/sparql/parser.rs

@@ -19,8 +19,6 @@ mod grammar {
     use std::char;
     use std::collections::BTreeMap;
     use std::collections::HashMap;
-    use std::io::BufReader;
-    use std::io::Read;
     use std::str::Chars;
 
     struct FocusedTriplePattern<F> {
@@ -533,9 +531,9 @@ mod grammar {
 
     include!(concat!(env!("OUT_DIR"), "/sparql_grammar.rs"));
 
-    pub fn read_sparql_query<'a, R: Read + 'a>(
-        source: R,
-        base_iri: Option<&'a str>,
+    pub fn read_sparql_query(
+        query: &str,
+        base_iri: Option<&str>,
     ) -> super::super::super::Result<QueryVariants> {
         let mut state = ParserState {
             base_iri: if let Some(base_iri) = base_iri {
@@ -548,13 +546,7 @@ mod grammar {
             aggregations: BTreeMap::default(),
         };
 
-        let mut string_buffer = String::default();
-        BufReader::new(source).read_to_string(&mut string_buffer)?;
-
-        Ok(QueryUnit(
-            &unescape_unicode_codepoints(&string_buffer),
-            &mut state,
-        )?)
+        Ok(QueryUnit(&unescape_unicode_codepoints(query), &mut state)?)
     }
 }
 

lib/src/store/memory.rs

@@ -32,7 +32,7 @@ use std::sync::RwLockWriteGuard;
 /// assert_eq!(vec![quad], results.unwrap());
 ///
 /// // SPARQL query
-/// let prepared_query = connection.prepare_query("SELECT ?s WHERE { ?s ?p ?o }".as_bytes()).unwrap();
+/// let prepared_query = connection.prepare_query("SELECT ?s WHERE { ?s ?p ?o }").unwrap();
 /// let results = prepared_query.exec().unwrap();
 /// if let QueryResult::Bindings(results) = results {
 ///     assert_eq!(results.into_values_iter().next().unwrap().unwrap()[0], Some(ex.into()));

lib/src/store/mod.rs

@@ -17,7 +17,7 @@ use rio_api::parser::{QuadParser, TripleParser};
 use rio_turtle::{NQuadsParser, NTriplesParser, TriGParser, TurtleParser};
 use rio_xml::RdfXmlParser;
 use std::collections::HashMap;
-use std::io::{BufRead, Read};
+use std::io::BufRead;
 use std::iter::{once, Iterator};
 
 /// Defines the `Store` traits that is used to have efficient binary storage
@@ -59,7 +59,7 @@ impl<S: StoreConnection> From<S> for StoreRepositoryConnection<S> {
 impl<S: StoreConnection> RepositoryConnection for StoreRepositoryConnection<S> {
     type PreparedQuery = SimplePreparedQuery<S>;
 
-    fn prepare_query(&self, query: impl Read) -> Result<SimplePreparedQuery<S>> {
+    fn prepare_query(&self, query: &str) -> Result<SimplePreparedQuery<S>> {
         SimplePreparedQuery::new(self.inner.clone(), query) //TODO: avoid clone
     }
 

lib/src/store/rocksdb.rs

@@ -42,7 +42,7 @@ use std::sync::Mutex;
 /// assert_eq!(vec![quad], results.unwrap());
 ///
 /// // SPARQL query
-/// let prepared_query = connection.prepare_query("SELECT ?s WHERE { ?s ?p ?o }".as_bytes()).unwrap();
+/// let prepared_query = connection.prepare_query("SELECT ?s WHERE { ?s ?p ?o }").unwrap();
 /// let results = prepared_query.exec().unwrap();
 /// if let QueryResult::Bindings(results) = results {
 ///     assert_eq!(results.into_values_iter().next().unwrap().unwrap()[0], Some(ex.into()));

lib/tests/sparql_test_cases.rs

@@ -31,10 +31,10 @@ fn sparql_w3c_syntax_testsuite() -> Result<()> {
             continue;
         }
         if test.kind == "PositiveSyntaxTest" || test.kind == "PositiveSyntaxTest11" {
-            match load_query(&test.query) {
+            match Query::parse(&read_file_to_string(&test.query)?, Some(&test.query)) {
                 Err(error) => assert!(false, "Failure on {} with error: {}", test, error),
                 Ok(query) => {
-                    if let Err(error) = Query::read(query.to_string().as_bytes(), None) {
+                    if let Err(error) = Query::parse(&query.to_string(), None) {
                         assert!(
                             false,
                             "Failure to deserialize \"{}\" of {} with error: {}",
@@ -47,7 +47,8 @@ fn sparql_w3c_syntax_testsuite() -> Result<()> {
             }
         } else if test.kind == "NegativeSyntaxTest" || test.kind == "NegativeSyntaxTest11" {
             //TODO
-            if let Ok(result) = load_query(&test.query) {
+            if let Ok(result) = Query::parse(&read_file_to_string(&test.query)?, Some(&test.query))
+            {
                 eprintln!("Failure on {}. The output tree is: {}", test, result);
             }
         } else {
@@ -128,7 +129,7 @@ fn sparql_w3c_query_evaluation_testsuite() -> Result<()> {
             }
             match repository
                 .connection()?
-                .prepare_query(read_file(&test.query)?)
+                .prepare_query(&read_file_to_string(&test.query)?)
             {
                 Err(error) => assert!(
                     false,
@@ -214,10 +215,6 @@ fn load_sparql_query_result_graph(url: &str) -> Result<SimpleGraph> {
     }
 }
 
-fn load_query(url: &str) -> Result<Query> {
-    Query::read(read_file(&url)?, Some(&url))
-}
-
 fn to_relative_path(url: &str) -> Result<String> {
     if url.starts_with("http://www.w3.org/2001/sw/DataAccess/tests/data-r2/") {
         Ok(url.replace(

server/src/main.rs

@@ -96,7 +96,9 @@ fn handle_request<R: RepositoryConnection>(
             if let Some(mut body) = request.data() {
                 if let Some(content_type) = request.header("Content-Type") {
                     if content_type.starts_with("application/sparql-query") {
-                        evaluate_sparql_query(connection, body)
+                        let mut buffer = String::default();
+                        body.read_to_string(&mut buffer).unwrap();
+                        evaluate_sparql_query(connection, &buffer)
                     } else if content_type.starts_with("application/x-www-form-urlencoded") {
                         let mut buffer = Vec::default();
                         body.read_to_end(&mut buffer).unwrap();
@@ -124,13 +126,13 @@ fn evaluate_urlencoded_sparql_query<R: RepositoryConnection>(
     encoded: &[u8],
 ) -> Response {
     if let Some((_, query)) = form_urlencoded::parse(encoded).find(|(k, _)| k == "query") {
-        evaluate_sparql_query(connection, query.as_bytes())
+        evaluate_sparql_query(connection, &query)
     } else {
         Response::text("You should set the 'query' parameter").with_status_code(400)
     }
 }
 
-fn evaluate_sparql_query<R: RepositoryConnection>(connection: R, query: impl Read) -> Response {
+fn evaluate_sparql_query<R: RepositoryConnection>(connection: R, query: &str) -> Response {
     //TODO: stream
     match connection.prepare_query(query) {
         Ok(query) => match query.exec().unwrap() {