Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/utils/DateAverager.java @ 4380:19754e5227c8

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Add facets for fixanalysis data from the datacage Add facets for fixanalysis data from the datacage to the bed difference height year, bed difference year and bed difference epoch output modes.
author Björn Ricks <bjoern.ricks@intevation.de>
date Fri, 02 Nov 2012 15:54:41 +0100
parents d520a0869972
children
rev   line source
3007
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
1 package de.intevation.flys.utils;
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
2
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
3 import gnu.trove.TLongArrayList;
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
4
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
5 import java.util.Date;
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
6
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
7 public class DateAverager
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
8 {
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
9 protected TLongArrayList dates;
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
10
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
11 public DateAverager() {
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
12 dates = new TLongArrayList();
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
13 }
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
14
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
15 public void add(Date date) {
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
16 dates.add(date.getTime());
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
17 }
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
18
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
19 public Date getAverage() {
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
20 int N = dates.size();
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
21 if (N == 0) {
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
22 return null;
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
23 }
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
24 long min = dates.min();
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
25 long sum = 0L;
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
26 for (int i = 0; i < N; ++i) {
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
27 sum += dates.getQuick(i) - min;
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
28 }
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
29 return new Date(min + (long)Math.round(sum/(double)N));
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
30 }
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
31
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
32 public void clear() {
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
33 dates.resetQuick();
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
34 }
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
35 }
d520a0869972 Added class to average dates without overflows.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
36 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org