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 Details

    • delegate

      protected final Dataset delegate

    • endpoints

      protected Set<String> endpoints

  • Constructor Details

    • FedXDataset

      public FedXDataset(Dataset delegate)

  • Method Details

    • 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