Package org.eclipse.rdf4j.query.algebra.evaluation

Interface RDFStarTripleSource

All Superinterfaces:

AvailableStatementOrder, TripleSource

All Known Implementing Classes:

SailDatasetTripleSource

public interface RDFStarTripleSource
extends TripleSource

Field Summary

Fields inherited from interface org.eclipse.rdf4j.query.algebra.evaluation.TripleSource

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 org.eclipse.rdf4j.query.algebra.evaluation.TripleSource

getComparator, getStatements, getStatements, getSupportedOrders, getValueFactory

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.