Package org.eclipse.rdf4j.federated.util

Class FedXUtil

java.lang.Object
org.eclipse.rdf4j.federated.util.FedXUtil
public class FedXUtil extends Object
General utility functions
Since:
5.0
Author:
Andreas Schwarte

  • Constructor Details

    • FedXUtil

      public FedXUtil()

  • Method Details

    • iri

      public static IRI iri(String iri)
      Parameters:
      iri -
      Returns:
      the IRI for the full URI string

    • literal

      public static Literal literal(String literal)
      Parameters:
      literal -
      Returns:
      the string literal

    • valueFactory

      public static ValueFactory valueFactory()
      Returns:
      a SimpleValueFactory instance

    • applyQueryBindings

      public static void applyQueryBindings(SailQuery query)
      Apply query bindings to transfer information from the query into the evaluation routine, e.g. the query execution time.
      Parameters:
      query -

    • getIncrementalUUID

      public static String getIncrementalUUID()
      Hexadecimal representation of an incremental integer.
      Returns:
      an incremental hex UUID

    • applyMaxQueryExecutionTime

      public static void applyMaxQueryExecutionTime(Operation operation, FederationContext federationContext)
      Set a maximum execution time corresponding to FedXConfig.getEnforceMaxQueryTime() to this operation. Note that this is an upper bound only as FedX applies other means for evaluation the maximum query execution time.
      Parameters:
      operation - the Operation
      federationContext - the FederationContext

    • toDataset

      public static Dataset toDataset(Resource[] contexts)
      Convert the given contexts to a Dataset representation.
      Parameters:
      contexts -
      Returns:

    • toContexts

      public static Resource[] toContexts(Dataset ds)
      Convert the given Dataset to an array of contexts
      Parameters:
      ds -
      Returns:

    • toContexts

      public static Resource[] toContexts(StatementPattern stmt, Dataset dataset)
      Retrieve the contexts from the StatementPattern and Dataset.
      Parameters:
      stmt -
      dataset -
      Returns:

    • toDataset

      public static Dataset toDataset(StatementPattern stmt, Dataset dataset)
      Returns a Dataset representation of the given StatementPattern and Dataset.

      If the StatementPattern does not have a context value, the Dataset is returned as-is, which may also be null.

      Otherwise the newly constructed Dataset contains all information from the original one plus the context from the statement.

      Parameters:
      stmt -
      dataset -
      Returns: