org.openrdf.sesame.sail.query
Class Intersect

java.lang.Object
  org.openrdf.sesame.sail.query.SetOperator
      org.openrdf.sesame.sail.query.Intersect

All Implemented Interfaces:

Query

public class Intersect

extends SetOperator

Determines the intersection of two sets of values that are produced by queries.

Constructor Summary

Intersect(Query leftArg, Query rightArg, boolean all)
Creates a new Intersect object that only reports query answers that are present in the query answer sets of both the left- and right argument.

Method Summary

void	evaluate(RdfSource rdfSource, QueryAnswerListener listener) Evaluates the query on the data contained in the supplied RdfSource and reports the results to the supplied QueryAnswerListener.
String	toString()

Methods inherited from class org.openrdf.sesame.sail.query.SetOperator

getColumnHeaders, getLeftArg, getRightArg, getVariables

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Intersect

public Intersect(Query leftArg,
                 Query rightArg,
                 boolean all)

Creates a new Intersect object that only reports query answers that are present in the query answer sets of both the left- and right argument.

Method Detail

evaluate

public void evaluate(RdfSource rdfSource,
                     QueryAnswerListener listener)
              throws SailQueryException

Description copied from interface: Query

Evaluates the query on the data contained in the supplied RdfSource and reports the results to the supplied QueryAnswerListener.

Parameters:

rdfSource - An RdfSource containing the data to evaluate the query on.

listener - A QueryAnswerListener that will receive any query results.

Throws:

SailQueryException - An exception indicating that the query evaluation was stopped abnormally.

toString

public String toString()