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2026-08-12 14:11:47 -04:00
parent 79894f654d
commit f852da4f4e
48 changed files with 4379 additions and 779 deletions
@@ -0,0 +1,45 @@
+use oxigraph::model::{NamedNode, NamedNodeRef, Term, TermRef};
+use oxigraph::model::vocab::xsd;
+use crate::vocab::rdf;
+
+pub(crate) fn term_to_named_node(term: &Term) -> Option<&NamedNode> {
+    if let Term::NamedNode(node) = term {
+        Some(node)
+    } else {
+        None
+    }
+}
+
+pub(crate) fn term_ref_as_named_node(term: TermRef<'_>) -> Option<NamedNodeRef<'_>> {
+    if let TermRef::NamedNode(node) = term {
+        Some(node)
+    } else {
+        None
+    }
+}
+
+pub(crate) fn term_as_str(term: &Term) -> Option<&str> {
+    if let Term::Literal(literal) = term {
+        match literal.datatype() {
+            xsd::STRING | xsd::NORMALIZED_STRING | rdf::LANG_STRING | rdf::DIR_LANG_STRING => {
+                Some(literal.value())
+            }
+            _ => None,
+        }
+    } else {
+        None
+    }
+}
+
+pub(crate) fn term_ref_as_str(term: TermRef<'_>) -> Option<&str> {
+    if let TermRef::Literal(literal) = term {
+        match literal.datatype() {
+            xsd::STRING | xsd::NORMALIZED_STRING | rdf::LANG_STRING | rdf::DIR_LANG_STRING => {
+                Some(literal.value())
+            }
+            _ => None,
+        }
+    } else {
+        None
+    }
+}