oxrdf::dataset

Struct GraphView

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pub struct GraphView<'a> { /* private fields */ }
Expand description

A read-only view on an RDF graph contained in a Dataset.

It is built using the Dataset::graph method.

Usage example:

use oxrdf::*;

let mut dataset = Dataset::default();
let ex = NamedNodeRef::new("http://example.com")?;
dataset.insert(QuadRef::new(ex, ex, ex, ex));

let results: Vec<_> = dataset.graph(ex).iter().collect();
assert_eq!(vec![TripleRef::new(ex, ex, ex)], results);

Implementations§

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impl<'a> GraphView<'a>

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pub fn iter(&self) -> GraphViewIter<'a>

Returns all the triples contained by the graph.

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pub fn triples_for_subject<'b>( &self, subject: impl Into<SubjectRef<'b>>, ) -> impl Iterator<Item = TripleRef<'a>> + 'a

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pub fn objects_for_subject_predicate<'b>( &self, subject: impl Into<SubjectRef<'b>>, predicate: impl Into<NamedNodeRef<'b>>, ) -> impl Iterator<Item = TermRef<'a>> + 'a

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pub fn object_for_subject_predicate<'b>( &self, subject: impl Into<SubjectRef<'b>>, predicate: impl Into<NamedNodeRef<'b>>, ) -> Option<TermRef<'a>>

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pub fn predicates_for_subject_object<'b>( &self, subject: impl Into<SubjectRef<'b>>, object: impl Into<TermRef<'b>>, ) -> impl Iterator<Item = NamedNodeRef<'a>> + 'a

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pub fn triples_for_predicate<'b>( &self, predicate: impl Into<NamedNodeRef<'b>>, ) -> impl Iterator<Item = TripleRef<'a>> + 'a

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pub fn subjects_for_predicate_object<'b>( &self, predicate: impl Into<NamedNodeRef<'b>>, object: impl Into<TermRef<'b>>, ) -> impl Iterator<Item = SubjectRef<'a>> + 'a

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pub fn subject_for_predicate_object<'b>( &self, predicate: impl Into<NamedNodeRef<'b>>, object: impl Into<TermRef<'b>>, ) -> Option<SubjectRef<'a>>

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pub fn triples_for_object<'b>( &self, object: impl Into<TermRef<'b>>, ) -> impl Iterator<Item = TripleRef<'a>> + 'a

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pub fn contains<'b>(&self, triple: impl Into<TripleRef<'b>>) -> bool

Checks if the graph contains the given triple.

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pub fn len(&self) -> usize

Returns the number of triples in this graph.

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pub fn is_empty(&self) -> bool

Checks if this graph contains a triple.

Trait Implementations§

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impl<'a> Clone for GraphView<'a>

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fn clone(&self) -> GraphView<'a>

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<'a> Debug for GraphView<'a>

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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 Display for GraphView<'_>

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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<'a> IntoIterator for &GraphView<'a>

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type Item = TripleRef<'a>

The type of the elements being iterated over.
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type IntoIter = GraphViewIter<'a>

Which kind of iterator are we turning this into?
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fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value. Read more
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impl<'a> IntoIterator for GraphView<'a>

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type Item = TripleRef<'a>

The type of the elements being iterated over.
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type IntoIter = GraphViewIter<'a>

Which kind of iterator are we turning this into?
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fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value. Read more

Auto Trait Implementations§

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impl<'a> Freeze for GraphView<'a>

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impl<'a> RefUnwindSafe for GraphView<'a>

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impl<'a> Send for GraphView<'a>

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impl<'a> Sync for GraphView<'a>

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impl<'a> Unpin for GraphView<'a>

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impl<'a> UnwindSafe for GraphView<'a>

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<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> 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> ToString for T
where T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. 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