/*
* The Java Conflation Suite (JCS) is a library of Java classes that
* can be used to build automated or semi-automated conflation solutions.
*
* Copyright (C) 2003 Vivid Solutions
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* For more information, contact:
*
* Vivid Solutions
* Suite #1A
* 2328 Government Street
* Victoria BC V8T 5G5
* Canada
*
* (250)385-6040
* www.vividsolutions.com
*/
package com.vividsolutions.jcs.conflate.polygonmatch;
import com.vividsolutions.jump.feature.Feature;
import com.vividsolutions.jump.feature.FeatureCollection;
/**
* Filters out all shapes except the one with the top score.
*/
public class TopScoreMatcher implements FeatureMatcher {
public TopScoreMatcher() {
}
/**
* Finds the candidate with the highest score. If several candidates share
* the top score, only one of them will be returned.
* @param target ignored
* @param candidates a Matches object created by another FeatureMatcher
* @return the candidate having the greatest score. The scores is
* preserved from the original Matches object.
*/
@Override
public Matches match(Feature target, FeatureCollection candidates) {
Matches survivors = new Matches(candidates.getFeatureSchema());
Feature survivor = null;
double topScore = 0;
Matches matches = (Matches) candidates;
for (int i = 0; i < matches.size(); i++) {
if (matches.getScore(i) >= topScore) {
topScore = matches.getScore(i);
survivor = matches.getFeature(i);
}
}
if (survivor != null) {
survivors.add(survivor, topScore);
}
return survivors;
}
}