Mercurial > dive4elements > river
view backend/src/main/java/org/dive4elements/river/utils/EpsilonComparator.java @ 6414:61e55f36e764 double-precision
Flow Velocity Parser: fixed regular expression for guessing main values
author | Tom Gottfried <tom.gottfried@intevation.de> |
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date | Tue, 25 Jun 2013 10:57:08 +0200 |
parents | 4c3ccf2b0304 |
children | 164e2f2c9bea |
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/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde * Software engineering by Intevation GmbH * * This file is Free Software under the GNU AGPL (>=v3) * and comes with ABSOLUTELY NO WARRANTY! Check out the * documentation coming with Dive4Elements River for details. */ package org.dive4elements.river.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 :