Mercurial > dive4elements > river
annotate backend/src/main/java/org/dive4elements/river/backend/utils/EpsilonComparator.java @ 9055:df5c5614e9a7
New pseudo datetime for year-only values (31.12. instead of 15.6.)
author | mschaefer |
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date | Fri, 04 May 2018 14:03:47 +0200 |
parents | 3bb1c62ad732 |
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Added header to river backend.
Sascha L. Teichmann <teichmann@intevation.de>
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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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6 * documentation coming with Dive4Elements River for details. |
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7 */ |
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8 |
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Moved package org.dive4elements.river.utils to org.dive4elements.river.backend.utils.
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9 package org.dive4elements.river.backend.utils; |
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Initial version of support files for TIMParser, comments and TODOs by Felix Wolfsteller, Code by Sascha Teichmann.
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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 |
4742 | 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 |
4742 | 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 : |