Mercurial > dive4elements > river

annotate backend/src/main/java/org/dive4elements/river/utils/EpsilonComparator.java @ 5844:4dd33b86dc61

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Added header to river backend.
author Sascha L. Teichmann <teichmann@intevation.de>
date Fri, 26 Apr 2013 08:25:41 +0200
parents 5aa05a7a34b7
children 4c3ccf2b0304
rev   line source
5844
4dd33b86dc61 Added header to river backend.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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Sascha L. Teichmann <teichmann@intevation.de>
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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18619c1e7c2a Repaired internal references.
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9 package org.dive4elements.river.utils;
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10
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11 import java.util.Comparator;
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12
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13 /** Comparator with some tolerance (epsilon). */
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14 public class EpsilonComparator implements Comparator<Double>
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15 {
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16 public static final double EPSILON = 1e-4;
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17
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18 /** Ready-made comparator with 1e-4 tolerance. */
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19 public static final EpsilonComparator CMP = new EpsilonComparator(EPSILON);
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21 private double epsilon;
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23 public EpsilonComparator(double epsilon) {
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24 this.epsilon = epsilon;
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25 }
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26
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27 @Override
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28 public int compare(Double a, Double b) {
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29 double diff = a - b;
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30 if (diff < -epsilon) return -1;
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31 if (diff > epsilon) return +1;
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32 return 0;
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33 }
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34 }
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35 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org