Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/model/LocationProvider.java @ 9801:1d7a72a50183 3.2.x tip

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Assume Compose V2, consistently
author Tom Gottfried <tom@intevation.de>
date Thu, 23 Nov 2023 10:14:13 +0100
parents 0a5239a1e46e
children
rev   line source
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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.artifacts.model;
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10
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11 import net.sf.ehcache.Cache;
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12 import net.sf.ehcache.Element;
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13
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14 import org.apache.logging.log4j.Logger;
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15 import org.apache.logging.log4j.LogManager;
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16
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17 import org.dive4elements.river.model.Annotation;
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18 import org.dive4elements.river.model.FastAnnotations;
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19
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20 import org.dive4elements.river.artifacts.cache.CacheFactory;
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21
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22
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23 /** Make FastAnnotations (db unbound) available. */
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24 public class LocationProvider {
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25
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26 private static final Logger log =
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27 LogManager.getLogger(LocationProvider.class);
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28
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29
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30 public static final String CACHE_KEY = "location-provider";
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31
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32 public static final String PREFIX = "lp-";
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33
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34
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35 private LocationProvider() {
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36 }
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37
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38 public static String getLocation(String river, double km) {
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39
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40 FastAnnotations fas = getAnnotations(river, km);
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41
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42 FastAnnotations.Annotation an = fas.findByKm(km);
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43
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44 return an != null ? an.getPosition() : null;
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45 }
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46
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47 public static FastAnnotations getAnnotations(String river) {
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48 return getAnnotations(river, Double.MAX_VALUE);
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49 }
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50
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51 protected static FastAnnotations getAnnotations(String river, double km) {
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52 // TODO issue880: Make annotations available _per type_
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53
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54 Cache cache = CacheFactory.getCache(CACHE_KEY);
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55
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56 if (cache == null) {
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57 return uncachedAnnotations(river, km);
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58 }
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59
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60 String key = PREFIX + river;
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61
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62 Element element = cache.get(key);
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63
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64 if (element != null) {
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65 return (FastAnnotations)element.getValue();
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66 }
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67
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68 FastAnnotations fas = uncachedAnnotations(river, Double.MAX_VALUE);
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69
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70 cache.put(new Element(key, fas));
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71
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72 return fas;
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73 }
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74
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75 protected static FastAnnotations uncachedAnnotations(
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76 String river,
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77 double km
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78 ) {
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79 if (km != Double.MAX_VALUE) {
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80 // XXX Fake it by using a standard Annotation.
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81
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82 Annotation annotation =
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83 AnnotationsFactory.getAnnotation(river, km);
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84
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85 if (annotation != null) {
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86 FastAnnotations.Annotation fa =
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87 new FastAnnotations.Annotation(
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88 km, Double.NaN,
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89 annotation.getPosition().getValue(), null, null,
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90 Double.NaN, Double.NaN);
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91 return new FastAnnotations(
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92 new FastAnnotations.Annotation [] { fa });
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93 }
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94
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95 return new FastAnnotations(new FastAnnotations.Annotation[0]);
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96 }
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97
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98 long startTime = System.currentTimeMillis();
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99
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100 FastAnnotations fas = new FastAnnotations(river);
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101
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102 long stopTime = System.currentTimeMillis();
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103
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104 if (log.isDebugEnabled()) {
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105 log.debug("Loading locations took " +
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106 (stopTime-startTime)/1000f + " secs.");
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107 }
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108
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109 return fas;
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110 }
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111 }
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112 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org