com.hp.hpl.jena.graph
Interface GraphStatisticsHandler

All Known Implementing Classes:

MultiUnion.MultiUnionStatisticsHandler

public interface GraphStatisticsHandler

A graph's StatisticsHandler offers access to some statistics about that graph's contents that might be useful for optimisation.

Author:

kers

Method Summary

long	getStatistic(Node S, Node P, Node O) Answer a good estimate of the number of triples that would match the pattern (S, P, O), or -1 if no good estimate is available.

Method Detail

getStatistic

long getStatistic(Node S,
                  Node P,
                  Node O)

Answer a good estimate of the number of triples that would match the pattern (S, P, O), or -1 if no good estimate is available. The estimate is good until the graph is updated.