Package org.eclipse.rdf4j.sail.base

Class SailDatasetTripleSource

java.lang.Object

org.eclipse.rdf4j.sail.base.SailDatasetTripleSource

All Implemented Interfaces:

RDFStarTripleSource, TripleSource

@InternalUseOnly
public class SailDatasetTripleSource
extends Object
implements RDFStarTripleSource

Implementation of the TripleSource interface using SailDataset

Field Summary

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

EMPTY_ITERATION, EMPTY_TRIPLE_ITERATION

Constructor Summary

Constructors

Constructor	Description
SailDatasetTripleSource(ValueFactory vf, SailDataset dataset)

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.
CloseableIteration<? extends Statement>	getStatements(Resource subj, IRI pred, Value obj, Resource... contexts)	Gets all statements that have a specific subject, predicate and/or object.
ValueFactory	getValueFactory()	Gets a ValueFactory object that can be used to create URI-, blank node- and literal objects.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

SailDatasetTripleSource

public SailDatasetTripleSource(ValueFactory vf,
 SailDataset dataset)

Method Details

toString

public String toString()

Overrides:

toString in class Object

getStatements

public CloseableIteration<? extends Statement> getStatements(Resource subj,
 IRI pred,
 Value obj,
 Resource... contexts)
                                                      throws QueryEvaluationException

Description copied from interface: TripleSource

Gets all statements that have a specific subject, predicate and/or object. All three parameters may be null to indicate wildcards. Optionally a (set of) context(s) may be specified in which case the result will be restricted to statements matching one or more of the specified contexts.

Specified by:

getStatements in interface TripleSource

Parameters:

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

pred - A URI specifying the predicate, or null for a wildcard.

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

contexts - The context(s) to get the statements from. Note that this parameter is a vararg and as such is optional. If no contexts are supplied the method operates on the entire repository.

Returns:

An iterator over the relevant statements.

Throws:

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

getValueFactory

public ValueFactory getValueFactory()

Description copied from interface: TripleSource

Gets a ValueFactory object that can be used to create URI-, blank node- and literal objects.

Specified by:

getValueFactory in interface TripleSource

Returns:

a ValueFactory object for this TripleSource.

getRdfStarTriples

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

Description copied from interface: RDFStarTripleSource

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

Specified by:

getRdfStarTriples in interface RDFStarTripleSource

Parameters:

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

pred - A URI 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.