org.eclipse.rdf4j.query.algebra.evaluation.util

Class TripleSources

java.lang.Object

org.eclipse.rdf4j.query.algebra.evaluation.util.TripleSources

Direct Known Subclasses:

Statements

public class TripleSources
extends Object

Utility methods for working with TripleSources.

Method Summary

Modifier and Type	Method and Description
static boolean	booleanValue(Resource subj, IRI pred, TripleSource store)
static CloseableIteration<? extends Literal,QueryEvaluationException>	getObjectLiterals(Resource subject, IRI predicate, TripleSource store)
static CloseableIteration<? extends Resource,QueryEvaluationException>	getObjectResources(Resource subject, IRI predicate, TripleSource store)
static CloseableIteration<? extends IRI,QueryEvaluationException>	getObjectURIs(Resource subject, IRI predicate, TripleSource store)
static CloseableIteration<? extends IRI,QueryEvaluationException>	getSubjectURIs(IRI predicate, Value object, TripleSource store)
static Iteration<? extends Value,QueryEvaluationException>	list(Resource subj, TripleSource store)
static Iteration<? extends Resource,QueryEvaluationException>	listResources(Resource subj, TripleSource store)
static Statement	single(Resource subj, IRI pred, Value obj, TripleSource store) Returns the single statement with the given subject, predicate and object or null if none exists.
static Value	singleValue(Resource subj, IRI pred, TripleSource store)

Methods inherited from class java.lang.Object

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

Method Detail

listResources

public static Iteration<? extends Resource,QueryEvaluationException> listResources(Resource subj,
                                                                                   TripleSource store)
                                                                            throws QueryEvaluationException

Throws:

QueryEvaluationException

list

public static Iteration<? extends Value,QueryEvaluationException> list(Resource subj,
                                                                       TripleSource store)
                                                                throws QueryEvaluationException

Throws:

QueryEvaluationException

booleanValue

public static boolean booleanValue(Resource subj,
                                   IRI pred,
                                   TripleSource store)
                            throws QueryEvaluationException

Throws:

QueryEvaluationException

singleValue

public static Value singleValue(Resource subj,
                                IRI pred,
                                TripleSource store)
                         throws QueryEvaluationException

Throws:

QueryEvaluationException

single

public static Statement single(Resource subj,
                               IRI pred,
                               Value obj,
                               TripleSource store)
                        throws QueryEvaluationException

Returns the single statement with the given subject, predicate and object or null if none exists. Context information is disregarded.

Parameters:

subj - null for any.

pred - null for any.

obj - null for any.

Throws:

QueryEvaluationException - If there is more than one such statement.

getSubjectURIs

public static CloseableIteration<? extends IRI,QueryEvaluationException> getSubjectURIs(IRI predicate,
                                                                                        Value object,
                                                                                        TripleSource store)
                                                                                 throws QueryEvaluationException

Throws:

QueryEvaluationException

getObjectResources

public static CloseableIteration<? extends Resource,QueryEvaluationException> getObjectResources(Resource subject,
                                                                                                 IRI predicate,
                                                                                                 TripleSource store)
                                                                                          throws QueryEvaluationException

Throws:

QueryEvaluationException

getObjectURIs

public static CloseableIteration<? extends IRI,QueryEvaluationException> getObjectURIs(Resource subject,
                                                                                       IRI predicate,
                                                                                       TripleSource store)
                                                                                throws QueryEvaluationException

Throws:

QueryEvaluationException

getObjectLiterals

public static CloseableIteration<? extends Literal,QueryEvaluationException> getObjectLiterals(Resource subject,
                                                                                               IRI predicate,
                                                                                               TripleSource store)
                                                                                        throws QueryEvaluationException

Throws:

QueryEvaluationException