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annotate artifacts/src/main/java/org/dive4elements/river/utils/UniqueDateFormatter.java @ 7697:640342d9ab8a

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(issue1649) Remove broken getWKms from RiverUtils and use WDifferencesState instead This was basically duplicated code but only the code in WDifferenceState was maintained and extended. Another RiverUtils function bites the dust.
author Andre Heinecke <aheinecke@intevation.de>
date Mon, 16 Dec 2013 16:24:07 +0100
parents 90f66b4fc34d
children 0a5239a1e46e
rev   line source
6865
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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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9 package org.dive4elements.river.utils;
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10
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11 import java.text.DateFormat;
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12 import java.util.Collection;
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13 import java.util.Date;
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14 import java.util.HashMap;
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15 import java.util.Map;
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16
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17 import org.apache.log4j.Logger;
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18
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19 public class UniqueDateFormatter {
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20
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21 private static Logger log = Logger.getLogger(UniqueDateFormatter.class);
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22
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23 private DateFormat df;
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24 private DateFormat lf;
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25 private Map<String, int[]> collisions;
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26
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27 public UniqueDateFormatter(
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28 DateFormat df,
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29 DateFormat lf,
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30 Collection<Date> dates
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31 ) {
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32 this.df = df;
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33 this.lf = lf;
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34 collisions = build(dates);
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35 }
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36
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37 private Map<String, int []> build(Collection<Date> dates) {
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38 Map<String, int []> collisions = new HashMap<String, int[]>();
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39 for (Date d: dates) {
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40 String s = df.format(d);
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41 int [] count = collisions.get(s);
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42 if (count == null) {
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43 collisions.put(s, count = new int[1]);
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44 }
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45 if (++count[0] > 1) {
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46 log.debug("date collsion found: " + d);
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47 }
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48 }
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49 return collisions;
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50 }
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51
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52 public String format(Date date) {
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53 String s = df.format(date);
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54 int [] count = collisions.get(s);
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55 return count == null || count[0] < 2
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56 ? s
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57 : lf.format(date);
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58 }
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59 }
http://dive4elements.wald.intevation.org