org.apache.marmotta.ldpath.api.backend

Interface RDFBackend<Node>

Type Parameters:

Node - most generic type of a Node (e.g. Value in Sesame).

All Superinterfaces:

NodeBackend<Node>

All Known Implementing Classes:

AbstractSesameBackend, ContextAwareSesameConnectionBackend, FileBackend, GenericJenaBackend, LDCacheBackend, LMFBackend, SesameConnectionBackend, SesameRepositoryBackend, ThreadingSesameBackend

public interface RDFBackend<Node>
extends NodeBackend<Node>

A generic API for RDF models and triple stores; provides the testing and navigation functions needed for LDPath. Implementations exist for Sesame, Jena and Clerezza. The API is somewhat typesafe by making use of a generic for nodes.

Method Summary

Methods

Modifier and Type	Method and Description
ThreadPoolExecutor	getThreadPool() Deprecated. subject to be removed in the next release
Collection<Node>	listObjects(Node subject, Node property) List the objects of triples in the triple store underlying this backend that have the subject and property given as argument.
Collection<Node>	listSubjects(Node property, Node object) List the subjects of triples in the triple store underlying this backend that have the object and property given as argument.
boolean	supportsThreading() Deprecated. subject to be removed in the next release

Methods inherited from interface org.apache.marmotta.ldpath.api.backend.NodeBackend

booleanValue, createLiteral, createLiteral, createURI, dateTimeValue, dateValue, decimalValue, doubleValue, floatValue, getLiteralLanguage, getLiteralType, integerValue, intValue, isBlank, isLiteral, isURI, longValue, stringValue, timeValue

Method Detail

supportsThreading

@Deprecated
boolean supportsThreading()

Deprecated. subject to be removed in the next release

getThreadPool

@Deprecated
ThreadPoolExecutor getThreadPool()

Deprecated. subject to be removed in the next release

listObjects

Collection<Node> listObjects(Node subject,
                           Node property)

List the objects of triples in the triple store underlying this backend that have the subject and property given as argument.

Parameters:

subject - the subject of the triples to look for

property - the property of the triples to look for, null is interpreted as wildcard

Returns:

all objects of triples with matching subject and property

listSubjects

Collection<Node> listSubjects(Node property,
                            Node object)

List the subjects of triples in the triple store underlying this backend that have the object and property given as argument.

Parameters:

object - the object of the triples to look for

property - the property of the triples to look for, null is interpreted as wildcard

Returns:

all subjects of triples with matching object and property

Throws:

UnsupportedOperationException - in case reverse selection is not supported (e.g. when querying Linked Data)