Struct rdftk_memgraph::data_set::MemDataSet

pub struct MemDataSet { /* fields omitted */ }

This implementation of the core DataSet and MutableDataSet traits is a simple in-memory hash from graph name to a MemGraph implementation.

Trait Implementations

impl DataSet for MemDataSet

fn is_empty(&self) -> bool

Returns true if there are no graphs in this data set, else false.

fn len(&self) -> usize

Return the number of graphs in this data set.

fn has_default_graph(&self) -> bool

Return true if this data set has a default graph, else false.

fn default_graph(&self) -> Option<&GraphRef>

Return the default graph for this data set, if it exists.

fn has_graph_named(&self, name: &GraphNameRef) -> bool

Return true if this data set has a graph with the provided name, else false.

fn graph_named(&self, name: &GraphNameRef) -> Option<&GraphRef>

Return the graph with the provided name from this data set, if it exists.

fn graphs<'a>(
    &'a self
) -> Box<dyn Iterator<Item = (&'a GraphNameRef, &'a GraphRef)> + 'a>

Return an iterator over graph name/graph pairs.

fn set_default_graph(&mut self, graph: GraphRef)

Set the provided graph as the default, unnamed graph, for this data set. Only one graph may be the default.

fn unset_default_graph(&mut self)

Remove any graph that may be set as the current default. This operation has no effect if no default graph is present.

fn insert(&mut self, name: GraphNameRef, graph: GraphRef)

Insert a new graph with it’s associated name into the data set.

fn remove(&mut self, name: &GraphNameRef)

Remove the graph with the provided name from this data set. This operation has no effect if no such graph is present.

fn clear(&mut self)

Remove all graphs from this data set.

fn factory(&self) -> DataSetFactoryRef

Return the factory that creates data sets of this kind.

impl Featured for MemDataSet

fn supports_feature(&self, _feature: &IRIRef) -> bool

Return true if this instance, or factory, supports the feature identified by the IRI.