Struct ViewDefinition 

pub struct ViewDefinition {
    pub name: String,
    pub sparql_query: String,
    pub is_materialized: bool,
    pub dependencies: Vec<String>,
}

Metadata that describes a named, materialized SPARQL view.

The dependencies field lists the predicate IRIs that the SPARQL query accesses. It is used for selective delta propagation: only views that mention a changed predicate in their dependencies (or have an empty list, meaning “depends on everything”) are invalidated when a triple changes.

Fields

name: String

Human-readable name that serves as the unique key in a maintainer.

sparql_query: String

The SPARQL SELECT query that defines the view’s result set.

is_materialized: bool

Whether the view caches its result rows (materialized) or is virtual.

dependencies: Vec<String>

Predicate IRIs this view’s query accesses.

An empty list means the view depends on all predicates (universal dependency), so it is invalidated by any triple change.

Implementations

impl ViewDefinition

pub fn new( name: impl Into<String>, sparql_query: impl Into<String>, is_materialized: bool, dependencies: Vec<String>, ) -> Self

Create a new view definition.

pub fn depends_on(&self, predicate: &str) -> bool

Return true if the given predicate IRI is listed in the dependencies, or if dependencies is empty (universal dependency).

Trait Implementations

impl Clone for ViewDefinition

fn clone(&self) -> ViewDefinition

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ViewDefinition

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

Formats the value using the given formatter.