Mercurial > dive4elements > river

annotate backend/src/main/java/org/dive4elements/river/backend/utils/EpsilonComparator.java @ 8187:3bb1c62ad732

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Moved package org.dive4elements.river.utils to org.dive4elements.river.backend.utils.
author Sascha L. Teichmann <teichmann@intevation.de>
date Thu, 04 Sep 2014 15:03:25 +0200
parents backend/src/main/java/org/dive4elements/river/utils/EpsilonComparator.java@164e2f2c9bea
children
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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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Sascha L. Teichmann <teichmann@intevation.de>
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2 * Software engineering by Intevation GmbH
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3 *
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Sascha L. Teichmann <teichmann@intevation.de>
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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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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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3bb1c62ad732 Moved package org.dive4elements.river.utils to org.dive4elements.river.backend.utils.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 6971
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9 package org.dive4elements.river.backend.utils;
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10
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11 import java.util.Comparator;
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12 import java.io.Serializable;
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13
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14 /** Comparator with some tolerance (epsilon). */
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15 public class EpsilonComparator implements Comparator<Double>, Serializable
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16 {
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17 public static final double EPSILON = 1e-4;
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18
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19 /** Ready-made comparator with 1e-4 tolerance. */
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20 public static final EpsilonComparator CMP = new EpsilonComparator(EPSILON);
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21
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22 private double epsilon;
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23
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24 public EpsilonComparator(double epsilon) {
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25 this.epsilon = epsilon;
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26 }
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27
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28 @Override
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29 public int compare(Double a, Double b) {
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30 double diff = a - b;
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31 if (diff < -epsilon) return -1;
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32 if (diff > epsilon) return +1;
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33 return 0;
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34 }
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35 }
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36 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org