SPARQL Query CRDT

Cargo.lock

@@ -3387,12 +3387,14 @@ dependencies = [
 name = "ng-oxigraph"
 version = "0.4.0-alpha.7-ngpreview6"
 dependencies = [
+ "base64-url",
  "codspeed-criterion-compat",
  "digest 0.10.7",
  "getrandom 0.2.10",
  "hex",
  "js-sys",
  "json-event-parser",
+ "lazy_static",
  "libc",
  "md-5",
  "memchr",

ng-oxigraph/Cargo.toml

@@ -28,6 +28,7 @@ sep-0006 = []
 oxsdatatypes = []
 
 [dependencies]
+lazy_static = "1.4.0"
 digest = "0.10"
 hex = "0.4"
 json-event-parser = "0.2.0-alpha.2"
@@ -35,7 +36,7 @@ md-5 = "0.10"
 oxilangtag = "0.1"
 oxiri = "0.2.3"
 rand = "0.8"
-regex = "1.7"
+regex = "1.8.4"
 serde = { version = "1.0.142", features = ["derive"] }
 sha1 = "0.10"
 sha2 = "0.10"
@@ -44,6 +45,7 @@ thiserror = "1.0.50"
 quick-xml = ">=0.29, <0.32"
 memchr = "2.5"
 peg = "0.8"
+base64-url = "2.0.0"
 
 [target.'cfg(all(not(target_family = "wasm"),not(docsrs)))'.dependencies]
 libc = "0.2"

ng-oxigraph/src/oxigraph/sparql/dataset.rs

@@ -4,18 +4,30 @@ use crate::oxigraph::sparql::EvaluationError;
 use crate::oxigraph::storage::numeric_encoder::{
     insert_term, EncodedQuad, EncodedTerm, StrHash, StrLookup,
 };
-use crate::oxigraph::storage::{StorageError, StorageReader};
+use crate::oxigraph::storage::{MatchBy, StorageError, StorageReader};
+use crate::oxigraph::store::CorruptionError;
+
 use std::cell::RefCell;
 use std::collections::hash_map::Entry;
 use std::collections::HashMap;
 use std::iter::empty;
-
 pub struct DatasetView {
     reader: StorageReader,
     extra: RefCell<HashMap<StrHash, String>>,
     dataset: EncodedDatasetSpec,
 }
 
+struct ErrorIterator {
+    err: Option<Result<EncodedQuad, EvaluationError>>,
+}
+
+impl Iterator for ErrorIterator {
+    type Item = Result<EncodedQuad, EvaluationError>;
+    fn next(&mut self) -> Option<Self::Item> {
+        self.err.take()
+    }
+}
+
 impl DatasetView {
     pub fn new(reader: StorageReader, dataset: &QueryDataset) -> Self {
         let dataset = EncodedDatasetSpec {
@@ -33,16 +45,47 @@ impl DatasetView {
         }
     }
 
-    fn store_encoded_quads_for_pattern(
+    fn parse_graph_name(&self, graph_name: &EncodedTerm) -> Result<MatchBy, StorageError> {
-        &self,
+        match graph_name {
-        subject: Option<&EncodedTerm>,
+            EncodedTerm::NamedNode { iri_id } => {
-        predicate: Option<&EncodedTerm>,
+                let graph_name_string = self.get_str(iri_id)?.ok_or::<StorageError>(
-        object: Option<&EncodedTerm>,
+                    CorruptionError::msg("graph_name not found in parse_graph_name").into(),
-        graph_name: Option<&EncodedTerm>,
+                )?;
-    ) -> impl Iterator<Item = Result<EncodedQuad, EvaluationError>> + 'static {
                 self.reader
-            .quads_for_pattern(subject, predicate, object, graph_name)
+                    .parse_graph_name(&graph_name_string, Some(*iri_id))
-            .map(|t| t.map_err(Into::into))
+            }
+            _ => Err(CorruptionError::msg(
+                "Invalid graph_name (not a NamedNode) in parse_graph_name",
+            )
+            .into()),
+        }
+    }
+
+    fn store_encoded_quads_for_pattern<'a>(
+        &'a self,
+        subject: Option<&'a EncodedTerm>,
+        predicate: Option<&'a EncodedTerm>,
+        object: Option<&'a EncodedTerm>,
+        graph_name: Option<&'a EncodedTerm>,
+    ) -> Box<dyn Iterator<Item = Result<EncodedQuad, EvaluationError>>> {
+        let graph = if let Some(g) = graph_name {
+            match self.parse_graph_name(g) {
+                Ok(match_by) => Some(match_by),
+                Err(e) => {
+                    return Box::new(ErrorIterator {
+                        err: Some(Err(e.into())),
+                    })
+                }
+            }
+        } else {
+            None
+        };
+
+        Box::new(
+            self.reader
+                .quads_for_pattern(subject, predicate, object, graph)
+                .map(|t| t.map_err(Into::into)),
+        )
     }
 
     #[allow(clippy::needless_collect)]
@@ -141,6 +184,7 @@ impl DatasetView {
             Box::new(iters.into_iter().flatten())
         } else {
             Box::new(
+                // TODO: filter could be removed here as we never return quads with defaultGraph as graph
                 self.store_encoded_quads_for_pattern(subject, predicate, object, None)
                     .filter(|quad| match quad {
                         Err(_) => true,

ng-oxigraph/src/oxigraph/storage/backend/fallback.rs

@@ -85,8 +85,10 @@ impl Db {
 #[derive(Clone, Ord, PartialOrd, Eq, PartialEq, Hash)]
 pub struct ColumnFamily(&'static str);
 
+#[derive(Clone)]
 pub struct Reader(InnerReader);
 
+#[derive(Clone)]
 enum InnerReader {
     Simple(Arc<RwLock<HashMap<ColumnFamily, BTreeMap<Vec<u8>, Vec<u8>>>>>),
     Transaction(

ng-oxigraph/src/oxigraph/storage/binary_encoder.rs

@@ -465,6 +465,12 @@ pub fn encode_term(t: &EncodedTerm) -> Vec<u8> {
     vec
 }
 
+pub fn encode_graph(t1: StrHash) -> Vec<u8> {
+    let mut vec = Vec::with_capacity(17);
+    write_term(&mut vec, &EncodedTerm::NamedNode { iri_id: t1 });
+    vec
+}
+
 pub fn encode_term_pair(t1: &EncodedTerm, t2: &EncodedTerm) -> Vec<u8> {
     let mut vec = Vec::with_capacity(2 * WRITTEN_TERM_MAX_SIZE);
     write_term(&mut vec, t1);
@@ -472,6 +478,13 @@ pub fn encode_term_pair(t1: &EncodedTerm, t2: &EncodedTerm) -> Vec<u8> {
     vec
 }
 
+pub fn encode_graph_term(t1: StrHash, t2: EncodedTerm) -> Vec<u8> {
+    let mut vec = Vec::with_capacity(WRITTEN_TERM_MAX_SIZE + 17);
+    write_term(&mut vec, &EncodedTerm::NamedNode { iri_id: t1 });
+    write_term(&mut vec, &t2);
+    vec
+}
+
 pub fn encode_term_triple(t1: &EncodedTerm, t2: &EncodedTerm, t3: &EncodedTerm) -> Vec<u8> {
     let mut vec = Vec::with_capacity(3 * WRITTEN_TERM_MAX_SIZE);
     write_term(&mut vec, t1);
@@ -480,6 +493,14 @@ pub fn encode_term_triple(t1: &EncodedTerm, t2: &EncodedTerm, t3: &EncodedTerm)
     vec
 }
 
+pub fn encode_term_graph_pair(t1: StrHash, t2: EncodedTerm, t3: EncodedTerm) -> Vec<u8> {
+    let mut vec = Vec::with_capacity(2 * WRITTEN_TERM_MAX_SIZE + 17);
+    write_term(&mut vec, &EncodedTerm::NamedNode { iri_id: t1 });
+    write_term(&mut vec, &t2);
+    write_term(&mut vec, &t3);
+    vec
+}
+
 pub fn encode_term_quad(
     t1: &EncodedTerm,
     t2: &EncodedTerm,
@@ -494,6 +515,20 @@ pub fn encode_term_quad(
     vec
 }
 
+pub fn encode_term_graph_triple(
+    t1: StrHash,
+    t2: EncodedTerm,
+    t3: EncodedTerm,
+    t4: EncodedTerm,
+) -> Vec<u8> {
+    let mut vec = Vec::with_capacity(3 * WRITTEN_TERM_MAX_SIZE + 17);
+    write_term(&mut vec, &EncodedTerm::NamedNode { iri_id: t1 });
+    write_term(&mut vec, &t2);
+    write_term(&mut vec, &t3);
+    write_term(&mut vec, &t4);
+    vec
+}
+
 pub fn write_term(sink: &mut Vec<u8>, term: &EncodedTerm) {
     match term {
         EncodedTerm::DefaultGraph => (),

ng-oxigraph/src/oxigraph/store.rs

@@ -294,7 +294,13 @@ impl Store {
                 subject.map(EncodedTerm::from).as_ref(),
                 predicate.map(EncodedTerm::from).as_ref(),
                 object.map(EncodedTerm::from).as_ref(),
-                graph_name.map(EncodedTerm::from).as_ref(),
+                graph_name.map(|graph_name_ref| {
+                    if let GraphName::NamedNode(nn) = graph_name_ref.into_owned() {
+                        reader.parse_graph_name(nn.as_string(), None).unwrap() //TODO improve error mng (remove unwrap)
+                    } else {
+                        panic!("invalid graph name");
+                    }
+                }),
             ),
             reader,
         }
@@ -1187,7 +1193,13 @@ impl<'a> Transaction<'a> {
                 subject.map(EncodedTerm::from).as_ref(),
                 predicate.map(EncodedTerm::from).as_ref(),
                 object.map(EncodedTerm::from).as_ref(),
-                graph_name.map(EncodedTerm::from).as_ref(),
+                graph_name.map(|graph_name_ref| {
+                    if let GraphName::NamedNode(nn) = graph_name_ref.into_owned() {
+                        reader.parse_graph_name(nn.as_string(), None).unwrap() //TODO improve error mng (remove unwrap)
+                    } else {
+                        panic!("invalid graph name");
+                    }
+                }),
             ),
             reader,
         }
@@ -1483,16 +1495,18 @@ impl<'a> Transaction<'a> {
         &mut self,
         quad: impl Into<QuadRef<'b>>,
         value: u8,
+        cv: bool,
     ) -> Result<(), StorageError> {
-        self.writer.ng_insert(quad.into(), value)
+        self.writer.ng_insert(quad.into(), value, cv)
     }
 
     pub fn insert_encoded(
         &mut self,
         encoded: &EncodedQuad,
         value: u8,
+        cv: bool,
     ) -> Result<bool, StorageError> {
-        self.writer.ng_insert_encoded(encoded, value)
+        self.writer.ng_insert_encoded(encoded, value, cv)
     }
 
     pub fn ng_remove(&mut self, quad: &EncodedQuad, commit: &StrHash) -> Result<(), StorageError> {
@@ -1662,7 +1676,7 @@ impl IntoIterator for &Transaction<'_> {
 
 /// An iterator returning the quads contained in a [`Store`].
 pub struct QuadIter {
-    iter: ChainedDecodingQuadIterator,
+    iter: Box<dyn Iterator<Item = Result<EncodedQuad, StorageError>>>,
     reader: StorageReader,
 }
 

ng-verifier/src/commits/transaction.rs

@@ -262,6 +262,7 @@ impl Verifier {
                             b.read_cap.tokenize(),
                         )
                     }
+                    // TODO: implement TargetBranchV0::Named
                     _ => unimplemented!(),
                 };
                 let _ = branches.entry(branch_id).or_insert((
@@ -404,12 +405,12 @@ impl Verifier {
                         for triple in update.transaction.inserts.iter() {
                             let triple_ref: TripleRef = triple.into();
                             let quad_ref = triple_ref.in_graph(cv_graphname_ref);
-                            transaction.insert(quad_ref, value)?;
+                            transaction.insert(quad_ref, value, true)?;
                             if let Some(ov_graphname) = ov_main.as_ref() {
                                 let ov_graphname_ref = GraphNameRef::NamedNode(ov_graphname.into());
                                 let triple_ref: TripleRef = triple.into();
                                 let quad_ref = triple_ref.in_graph(ov_graphname_ref);
-                                transaction.insert(quad_ref, REPO_IN_MAIN)?;
+                                transaction.insert(quad_ref, REPO_IN_MAIN, false)?;
                             }
                         }
 
@@ -493,7 +494,7 @@ impl Verifier {
                                         encoded_object.clone(),
                                         graph_encoded,
                                     );
-                                    transaction.insert_encoded(&quad_encoded, value)?;
+                                    transaction.insert_encoded(&quad_encoded, value, true)?;
                                     transaction.ng_remove(&quad_encoded, &commit_encoded)?;
                                 }
                                 if let Some(ov_graphname) = ov_main.as_ref() {