oxigraph::sparql

Struct QueryDataset

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pub struct QueryDataset { /* private fields */ }
Expand description

A SPARQL query dataset specification

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impl QueryDataset

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pub fn is_default_dataset(&self) -> bool

Checks if this dataset specification is the default one (i.e. the default graph is the store default graph and all the store named graphs are available)

use oxigraph::sparql::Query;

assert!(Query::parse("SELECT ?s ?p ?o WHERE { ?s ?p ?o . }", None)?
    .dataset()
    .is_default_dataset());
assert!(!Query::parse(
    "SELECT ?s ?p ?o FROM <http://example.com> WHERE { ?s ?p ?o . }",
    None
)?
.dataset()
.is_default_dataset());
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pub fn default_graph_graphs(&self) -> Option<&[GraphName]>

Returns the list of the store graphs that are available to the query as the default graph or None if the union of all graphs is used as the default graph This list is by default only the store default graph

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pub fn set_default_graph_as_union(&mut self)

Sets if the default graph for the query should be the union of all the graphs in the queried store

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pub fn set_default_graph(&mut self, graphs: Vec<GraphName>)

Sets the list of graphs the query should consider as being part of the default graph.

By default only the store default graph is considered.

use oxigraph::model::NamedNode;
use oxigraph::sparql::Query;

let mut query = Query::parse("SELECT ?s ?p ?o WHERE { ?s ?p ?o . }", None)?;
let default = vec![NamedNode::new("http://example.com")?.into()];
query.dataset_mut().set_default_graph(default.clone());
assert_eq!(
    query.dataset().default_graph_graphs(),
    Some(default.as_slice())
);
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pub fn available_named_graphs(&self) -> Option<&[NamedOrBlankNode]>

Returns the list of the available named graphs for the query or None if all graphs are available

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pub fn set_available_named_graphs( &mut self, named_graphs: Vec<NamedOrBlankNode>, )

Sets the list of allowed named graphs in the query.

use oxigraph::model::NamedNode;
use oxigraph::sparql::Query;

let mut query = Query::parse("SELECT ?s ?p ?o WHERE { ?s ?p ?o . }", None)?;
let named = vec![NamedNode::new("http://example.com")?.into()];
query
    .dataset_mut()
    .set_available_named_graphs(named.clone());
assert_eq!(
    query.dataset().available_named_graphs(),
    Some(named.as_slice())
);

Trait Implementations§

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impl Clone for QueryDataset

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fn clone(&self) -> QueryDataset

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for QueryDataset

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Hash for QueryDataset

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for QueryDataset

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fn eq(&self, other: &QueryDataset) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Eq for QueryDataset

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impl StructuralPartialEq for QueryDataset

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V