org.opensphere.geometry.triangulation.DoubleComparator Maven / Gradle / Ivy
/* This file is based on code copied from project OpenSphere, see the LICENSE file for further information. */
package org.opensphere.geometry.triangulation;
import java.util.Comparator;
import java.util.Map;
import org.locationtech.jts.triangulate.quadedge.QuadEdge;
/**
* Comparator of a map containing QuadEdge as key
* and Double as value (Double comparator).
*
* @author Eric Grosso
*
*/
public class DoubleComparator implements Comparator {
Map map;
/**
* Constructor.
*
* @param map
* map containing QuadEdge and Double
*/
public DoubleComparator(Map map) {
this.map = map;
}
/**
* Method of comparison.
*
* @param qeA
* quad edge to compare
* @param qeB
* quad edge to compare
* @return
* 1 if double value associated to qeA less than double
* value associated to qeB,
* 0 if values are equals,
* -1 otherwise
*/
@Override
public int compare(QuadEdge qeA, QuadEdge qeB) {
final double distanceA = this.map.get(qeA);
final double distanceB = this.map.get(qeB);
if (distanceA < distanceB) {
return 1;
} else if (distanceA == distanceB) {
return 0;
} else {
return -1;
}
}
}