Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/LocationProvider.java @ 4192:34337e357a54

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Add message for gauge_discharge_curve_at_export Add message to display a correct info at the save at export icon when hovering.
author Björn Ricks <bjoern.ricks@intevation.de>
date Fri, 19 Oct 2012 13:59:51 +0200
parents efb067ab2ca4
children
rev   line source
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1 package de.intevation.flys.artifacts.model;
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2
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3 import net.sf.ehcache.Cache;
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4 import net.sf.ehcache.Element;
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5
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6 import org.apache.log4j.Logger;
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7
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8 import de.intevation.flys.model.Annotation;
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9 import de.intevation.flys.model.FastAnnotations;
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11 import de.intevation.flys.artifacts.cache.CacheFactory;
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13
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14 /** Make FastAnnotations (db unbound) available. */
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15 public class LocationProvider {
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17 private static final Logger log =
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18 Logger.getLogger(LocationProvider.class);
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20
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21 public static final String CACHE_KEY = "location-provider";
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23 public static final String PREFIX = "lp-";
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24
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26 private LocationProvider() {
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27 }
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28
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29 public static String getLocation(String river, double km) {
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31 FastAnnotations fas = getAnnotations(river, km);
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32
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33 FastAnnotations.Annotation an = fas.findByKm(km);
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34
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35 return an != null ? an.getPosition() : null;
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36 }
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37
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38 public static FastAnnotations getAnnotations(String river) {
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39 return getAnnotations(river, Double.MAX_VALUE);
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40 }
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41
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42 protected static FastAnnotations getAnnotations(String river, double km) {
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43 // TODO issue880: Make annotations available _per type_
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45 Cache cache = CacheFactory.getCache(CACHE_KEY);
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47 if (cache == null) {
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48 return uncachedAnnotations(river, km);
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49 }
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50
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51 String key = PREFIX + river;
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52
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53 Element element = cache.get(key);
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54
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55 if (element != null) {
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56 return (FastAnnotations)element.getValue();
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57 }
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58
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59 FastAnnotations fas = uncachedAnnotations(river, Double.MAX_VALUE);
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60
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61 cache.put(new Element(key, fas));
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62
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63 return fas;
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64 }
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65
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66 protected static FastAnnotations uncachedAnnotations(
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67 String river,
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68 double km
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69 ) {
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70 if (km != Double.MAX_VALUE) {
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71 // XXX Fake it by using a standard Annotation.
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72
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73 Annotation annotation =
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74 AnnotationsFactory.getAnnotation(river, km);
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75
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76 if (annotation != null) {
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77 FastAnnotations.Annotation fa =
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78 new FastAnnotations.Annotation(
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79 km, Double.NaN,
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80 annotation.getPosition().getValue(), null, null,
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81 Double.NaN, Double.NaN);
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82 return new FastAnnotations(
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83 new FastAnnotations.Annotation [] { fa });
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84 }
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85
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86 return new FastAnnotations(new FastAnnotations.Annotation[0]);
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87 }
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88
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89 long startTime = System.currentTimeMillis();
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90
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91 FastAnnotations fas = new FastAnnotations(river);
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92
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93 long stopTime = System.currentTimeMillis();
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94
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95 if (log.isDebugEnabled()) {
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96 log.debug("Loading locations took " +
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97 (stopTime-startTime)/1000f + " secs.");
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98 }
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99
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100 return fas;
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101 }
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102 }
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103 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org