rdf_fusion_functions/scalar/strings/
str_ends.rs

1use crate::scalar::dispatch::dispatch_binary_typed_value;
2use crate::scalar::sparql_op_impl::{
3    ScalarSparqlOpImpl, create_typed_value_sparql_op_impl,
4};
5use crate::scalar::{ScalarSparqlOp, ScalarSparqlOpSignature, SparqlOpArity};
6use rdf_fusion_encoding::typed_value::TypedValueEncoding;
7use rdf_fusion_extensions::functions::BuiltinName;
8use rdf_fusion_extensions::functions::FunctionName;
9use rdf_fusion_model::{
10    CompatibleStringArgs, StringLiteralRef, ThinError, TypedValueRef,
11};
12
13/// Implementation of the SPARQL `strends` function.
14#[derive(Debug, Hash, PartialEq, Eq)]
15pub struct StrEndsSparqlOp;
16
17impl Default for StrEndsSparqlOp {
18    fn default() -> Self {
19        Self::new()
20    }
21}
22
23impl StrEndsSparqlOp {
24    const NAME: FunctionName = FunctionName::Builtin(BuiltinName::StrEnds);
25
26    /// Creates a new [StrEndsSparqlOp].
27    pub fn new() -> Self {
28        Self {}
29    }
30}
31
32impl ScalarSparqlOp for StrEndsSparqlOp {
33    fn name(&self) -> &FunctionName {
34        &Self::NAME
35    }
36
37    fn signature(&self) -> ScalarSparqlOpSignature {
38        ScalarSparqlOpSignature::default_with_arity(SparqlOpArity::Fixed(2))
39    }
40    fn typed_value_encoding_op(
41        &self,
42    ) -> Option<Box<dyn ScalarSparqlOpImpl<TypedValueEncoding>>> {
43        Some(create_typed_value_sparql_op_impl(|args| {
44            dispatch_binary_typed_value(
45                &args.args[0],
46                &args.args[1],
47                |lhs_value, rhs_value| {
48                    let lhs_value = StringLiteralRef::try_from(lhs_value)?;
49                    let rhs_value = StringLiteralRef::try_from(rhs_value)?;
50                    let args = CompatibleStringArgs::try_from(lhs_value, rhs_value)?;
51                    Ok(TypedValueRef::BooleanLiteral(
52                        args.lhs.ends_with(args.rhs).into(),
53                    ))
54                },
55                |_, _| ThinError::expected(),
56            )
57        }))
58    }
59}
rdf_fusion_functions/scalar/strings/str_ends.rs

rdf_fusion_functions/scalar/strings/
str_ends.rs
