Package org.eclipse.rdf4j.federated.structures

Class FedXDataset

java.lang.Object

org.eclipse.rdf4j.federated.structures.FedXDataset

All Implemented Interfaces:

Dataset

public class FedXDataset
extends Object
implements Dataset

Abstraction of a Dataset to provide additional information for the evaluation of a query.

Can be used to define the endpoints against which a given query shall be executed.

Example

 TupleQuery tq = ...;
 FedXDataset ds = new FedXDataset(tq.getDataset);
 ds.addEndpoint("myEndpoint");
 ds.addEndpoint("otherEndpoint");
 tq.setDataset(ds)
 TupleQueryResult res = tq.evaluate()
 

Author:

Andreas Schwarte

Field Summary

Fields

Modifier and Type	Field	Description
protected Dataset	delegate
protected Set<String>	endpoints

Constructor Summary

Constructors

Constructor	Description
FedXDataset(Dataset delegate)

Method Summary

Modifier and Type	Method	Description
void	addEndpoint(String endpointId)
void	addEndpoints(Collection<String> endpointIDs)
Set<IRI>	getDefaultGraphs()	Gets the default graph URIs of this dataset.
IRI	getDefaultInsertGraph()	Gets the default insert graph URI of this dataset.
Set<IRI>	getDefaultRemoveGraphs()	Gets the default remove graph URIs of this dataset.
Set<String>	getEndpoints()
Set<IRI>	getNamedGraphs()	Gets the named graph URIs of this dataset.

Methods inherited from class java.lang.Object

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

Field Detail

delegate

protected final Dataset delegate

endpoints

protected Set<String> endpoints

Constructor Detail

FedXDataset

public FedXDataset(Dataset delegate)

Method Detail

addEndpoint

public void addEndpoint(String endpointId)

addEndpoints

public void addEndpoints(Collection<String> endpointIDs)

getEndpoints

public Set<String> getEndpoints()

getDefaultGraphs

public Set<IRI> getDefaultGraphs()

Description copied from interface: Dataset

Gets the default graph URIs of this dataset. An empty default graph set and a non-empty named graph set indicates that the default graph is an empty graph. However, if both the default graph set and the named graph set are empty, that indicates that the store's default behaviour should be used.

Specified by:

getDefaultGraphs in interface Dataset

getDefaultInsertGraph

public IRI getDefaultInsertGraph()

Description copied from interface: Dataset

Gets the default insert graph URI of this dataset. An null value indicates that the store's default behaviour should be used, if not otherwise indicated in the operation.

Specified by:

getDefaultInsertGraph in interface Dataset

getDefaultRemoveGraphs

public Set<IRI> getDefaultRemoveGraphs()

Description copied from interface: Dataset

Gets the default remove graph URIs of this dataset. An empty set indicates the the store's default behaviour should be used, if not otherwise indicated in the operation.

Specified by:

getDefaultRemoveGraphs in interface Dataset

getNamedGraphs

public Set<IRI> getNamedGraphs()

Description copied from interface: Dataset

Gets the named graph URIs of this dataset. An empty named graph set and a non-empty default graph set indicates that there are no named graphs. However, if both the default graph set and the named graph set are empty, that indicates that the store's default behaviour should be used.

Specified by:

getNamedGraphs in interface Dataset