Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/utils/DateAverager.java @ 3468:f37e7e8907cb
merged flys-artifacts/2.8.1
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:14:39 +0200 |
| parents | d520a0869972 |
| children |
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| 3387:5ffad8bde8ad | 3468:f37e7e8907cb |
|---|---|
| 1 package de.intevation.flys.utils; | |
| 2 | |
| 3 import gnu.trove.TLongArrayList; | |
| 4 | |
| 5 import java.util.Date; | |
| 6 | |
| 7 public class DateAverager | |
| 8 { | |
| 9 protected TLongArrayList dates; | |
| 10 | |
| 11 public DateAverager() { | |
| 12 dates = new TLongArrayList(); | |
| 13 } | |
| 14 | |
| 15 public void add(Date date) { | |
| 16 dates.add(date.getTime()); | |
| 17 } | |
| 18 | |
| 19 public Date getAverage() { | |
| 20 int N = dates.size(); | |
| 21 if (N == 0) { | |
| 22 return null; | |
| 23 } | |
| 24 long min = dates.min(); | |
| 25 long sum = 0L; | |
| 26 for (int i = 0; i < N; ++i) { | |
| 27 sum += dates.getQuick(i) - min; | |
| 28 } | |
| 29 return new Date(min + (long)Math.round(sum/(double)N)); | |
| 30 } | |
| 31 | |
| 32 public void clear() { | |
| 33 dates.resetQuick(); | |
| 34 } | |
| 35 } | |
| 36 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |