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package de.lmu.ifi.dbs.elki.utilities;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2011
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* Provides some statistics about queries
* using a filter-refinement architecture.
*
* @author Elke Achtert
*/
public class QueryStatistic {
/**
* The number of candidate objects which need a refinement.
*/
private int candidates;
/**
* The number of true hits which do not need a refinement.
*/
private int trueHits;
/**
* The overall number of the result objects after refinement
* plus the true hits.
*/
private int results;
/**
* Clears the values of this statistic.
*/
public void clear() {
this.candidates = 0;
this.trueHits = 0;
this.results = 0;
}
/**
* Adds the specified number to the number of the result objects.
*
* @param results the number of the result objects to be added
*/
public void addResults(int results) {
this.results += results;
}
/**
* Adds the specified number to the number of the candidate objects.
*
* @param candidates the number of the candidate objects to be added
*/
public void addCandidates(int candidates) {
this.candidates += candidates;
}
/**
* Adds the specified number to the number of the true hits.
*
* @param trueHits the number of the true hits to be added
*/
public void addTrueHits(int trueHits) {
this.trueHits += trueHits;
}
/**
* Returns the number of candidate objects and the number of the result objects after refinement.
*
* @return a string representation of this query statistic
*/
@Override
public String toString() {
return
"# candidates = " + candidates +
"\n# true hits = " + trueHits +
"\n# results = " + results;
}
}
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