Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/utils/DateAverager.java @ 4740:fb135e1dfa35

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Added 'type' attribute to <dc:variable/> element. If an optional 'type' attribute is given the result of the XPATH expression is interpreted as this type. Valid values are 'number', 'bool', 'node' and 'nodeset'. All other defaults to 'string' which also is the default if nor type is given.
author Sascha L. Teichmann <teichmann@intevation.de>
date Wed, 02 Jan 2013 15:31:53 +0100
parents d520a0869972
children
rev   line source
3007
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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1 package de.intevation.flys.utils;
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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2
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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3 import gnu.trove.TLongArrayList;
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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4
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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5 import java.util.Date;
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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6
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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7 public class DateAverager
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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8 {
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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9 protected TLongArrayList dates;
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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10
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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11 public DateAverager() {
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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12 dates = new TLongArrayList();
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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13 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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14
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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15 public void add(Date date) {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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16 dates.add(date.getTime());
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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17 }
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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18
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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19 public Date getAverage() {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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20 int N = dates.size();
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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21 if (N == 0) {
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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22 return null;
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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23 }
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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24 long min = dates.min();
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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25 long sum = 0L;
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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26 for (int i = 0; i < N; ++i) {
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27 sum += dates.getQuick(i) - min;
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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28 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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29 return new Date(min + (long)Math.round(sum/(double)N));
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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30 }
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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31
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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32 public void clear() {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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33 dates.resetQuick();
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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34 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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35 }
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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36 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org