Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/utils/DateAverager.java @ 5863:4897a58c8746

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River artifacts: Added new copyright headers.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 28 Apr 2013 14:40:59 +0200
parents 5aa05a7a34b7
children af13ceeba52a
rev   line source
5863
4897a58c8746 River artifacts: Added new copyright headers.
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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Sascha L. Teichmann <teichmann@intevation.de>
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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
5831
bd047b71ab37 Repaired internal references
Sascha L. Teichmann <teichmann@intevation.de>
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9 package org.dive4elements.river.utils;
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10
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11 import gnu.trove.TLongArrayList;
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12
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13 import java.util.Date;
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14
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15 public class DateAverager
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16 {
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17 protected TLongArrayList dates;
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18
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19 public DateAverager() {
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20 dates = new TLongArrayList();
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21 }
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22
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23 public void add(Date date) {
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24 dates.add(date.getTime());
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25 }
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26
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27 public Date getAverage() {
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28 int N = dates.size();
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29 if (N == 0) {
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30 return null;
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31 }
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32 long min = dates.min();
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33 long sum = 0L;
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34 for (int i = 0; i < N; ++i) {
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35 sum += dates.getQuick(i) - min;
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36 }
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37 return new Date(min + (long)Math.round(sum/(double)N));
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38 }
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39
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40 public void clear() {
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41 dates.resetQuick();
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42 }
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43 }
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44 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org