Struct UnionView 

pub struct UnionView {
    pub name: String,
    /* private fields */
}

A virtual view that presents the union of multiple named graph views.

Duplicate triples (appearing in more than one source graph) are deduplicated when deduplicate is set to true.

Fields

name: String

Human-readable name for this union view.

Implementations

impl UnionView

pub fn new(name: &str, graphs: Vec<GraphView>, deduplicate: bool) -> Self

Create a new union view over the given graphs.

pub fn add_graph(&mut self, graph: GraphView)

Add a new graph to the union.

pub fn triples(&self) -> Vec<&RdfTriple>

Enumerate all triples from all source graphs.

If deduplicate is set, duplicate triples across graphs are returned only once.

pub fn find( &self, subject: Option<&str>, predicate: Option<&str>, object: Option<&str>, ) -> Vec<&RdfTriple>

Find triples matching a pattern across all source graphs.

pub fn len(&self) -> usize

Total triple count (may count duplicates if deduplicate is false).

pub fn is_empty(&self) -> bool

pub fn graph_count(&self) -> usize

Number of source graphs.

pub fn graph_names(&self) -> Vec<&str>

Names of all source graphs.

Trait Implementations

impl Clone for UnionView

fn clone(&self) -> UnionView

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for UnionView

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

Formats the value using the given formatter.