Interface RDFStarTripleSource

All Superinterfaces:

AvailableStatementOrder, TripleSource

All Known Implementing Classes:

SailDatasetTripleSource

public interface RDFStarTripleSource
extends TripleSource

Field Summary

Fields inherited from interface TripleSource

EMPTY_ITERATION

Modifier and Type	Field	Description
static final EmptyIteration<? extends Statement>	EMPTY_ITERATION

Method Summary

Modifier and Type	Method	Description
CloseableIteration<? extends Triple>	getRdfStarTriples(Resource subj, IRI pred, Value obj)	Gets all Triple nodes that have a specific subject, predicate and/or object.

Methods inherited from interface TripleSource

getComparator, getStatements, getStatements, getSupportedOrders, getValueFactory

Modifier and Type	Method	Description
default Comparator<Value>	getComparator()	Different underlying datastructures may have different ways of ordering statements.
default CloseableIteration<? extends Statement>	getStatements(StatementOrder order, Resource subj, IRI pred, Value obj, Resource... contexts)	Gets all statements that have a specific subject, predicate and/or object.
CloseableIteration<? extends Statement>	getStatements(Resource subj, IRI pred, Value obj, Resource... contexts)	Gets all statements that have a specific subject, predicate and/or object.
default Set<StatementOrder>	getSupportedOrders(Resource subj, IRI pred, Value obj, Resource... contexts)	The underlying store may support some, but not all, statement orders based on the statement pattern.
ValueFactory	getValueFactory()	Gets a ValueFactory object that can be used to create IRI-, blank node- and literal objects.

Method Details

getRdfStarTriples

CloseableIteration<? extends Triple> getRdfStarTriples(Resource subj,
 IRI pred,
 Value obj)
                                                throws QueryEvaluationException

Gets all Triple nodes that have a specific subject, predicate and/or object. All three parameters may be null to indicate wildcards.

Parameters:

subj - A Resource specifying the triple's subject, or null for a wildcard.

pred - A IRI specifying the triple's predicate, or null for a wildcard.

obj - A Value specifying the triple's object, or null for a wildcard.

Returns:

An iterator over the relevant triples.

Throws:

QueryEvaluationException - If the rdf star triple source failed to get the statements.