Mercurial > dive4elements > river
diff flys-backend/src/main/java/org/dive4elements/river/utils/EpsilonComparator.java @ 5828:dfb26b03b179
Moved directories to org.dive4elements.river
author | Sascha L. Teichmann <teichmann@intevation.de> |
---|---|
date | Thu, 25 Apr 2013 11:53:11 +0200 |
parents | flys-backend/src/main/java/de/intevation/flys/utils/EpsilonComparator.java@ce6b9945bf8e |
children | 18619c1e7c2a |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-backend/src/main/java/org/dive4elements/river/utils/EpsilonComparator.java Thu Apr 25 11:53:11 2013 +0200 @@ -0,0 +1,27 @@ +package de.intevation.flys.utils; + +import java.util.Comparator; + +/** Comparator with some tolerance (epsilon). */ +public class EpsilonComparator implements Comparator<Double> +{ + public static final double EPSILON = 1e-4; + + /** Ready-made comparator with 1e-4 tolerance. */ + public static final EpsilonComparator CMP = new EpsilonComparator(EPSILON); + + private double epsilon; + + public EpsilonComparator(double epsilon) { + this.epsilon = epsilon; + } + + @Override + public int compare(Double a, Double b) { + double diff = a - b; + if (diff < -epsilon) return -1; + if (diff > epsilon) return +1; + return 0; + } +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :