Interface NativeTripleTermSource

All Superinterfaces:

AvailableStatementOrder, TripleSource

All Known Implementing Classes:

SailDatasetTripleTermSource

public interface NativeTripleTermSource
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 TripleTerm>	getTripleTerms(Resource subj, IRI pred, Value obj)	Gets all TripleTerm nodes that have a specific subject, predicate and/or object.

Methods inherited from interface TripleSource

getComparator, getStatementCount, getStatements, getStatements, getSupportedOrders, getValueFactory

Modifier and Type	Method	Description
default Comparator<Value>	getComparator()	Different underlying datastructures may have different ways of ordering statements.
default long	getStatementCount(Resource subj, IRI pred, Value obj, Resource... contexts)	Counts statements matching the supplied pattern without requiring callers to materialize converted bindings.
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

getTripleTerms

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

Gets all TripleTerm 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.