Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/LocationProvider.java @ 2259:0dcb8326be08
Add a not-yet-looked-at CSV facet for Reference Curve.
flys-artifacts/trunk@3914 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Mon, 06 Feb 2012 10:15:41 +0000 |
parents | a4bdf7d8527e |
children | fe3ea0f16098 |
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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10 |
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11 import de.intevation.flys.artifacts.cache.CacheFactory; |
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12 |
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13 import de.intevation.flys.artifacts.model.AnnotationsFactory; |
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14 |
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15 public class LocationProvider { |
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16 |
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17 private static final Logger log = |
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18 Logger.getLogger(LocationProvider.class); |
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19 |
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20 |
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21 public static final String CACHE_KEY = "location-provider"; |
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22 |
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23 public static final String PREFIX = "lp-"; |
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24 |
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25 |
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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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30 |
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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.NaN); |
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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 |
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44 Cache cache = CacheFactory.getCache(CACHE_KEY); |
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45 |
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46 if (cache == null) { |
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47 return uncachedAnnotations(river, km); |
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48 } |
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49 |
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50 String key = PREFIX + river; |
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51 |
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52 Element element = cache.get(key); |
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53 |
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54 if (element != null) { |
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55 return (FastAnnotations)element.getValue(); |
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56 } |
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57 |
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58 FastAnnotations fas = uncachedAnnotations(river, Double.MAX_VALUE); |
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59 |
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60 cache.put(new Element(key, fas)); |
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61 |
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62 return fas; |
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63 } |
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64 |
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65 protected static FastAnnotations uncachedAnnotations( |
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66 String river, |
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67 double km |
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68 ) { |
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69 if (km != Double.MAX_VALUE) { |
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70 // XXX Fake it by using a standard Annotation. |
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71 |
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72 Annotation annotation = |
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73 AnnotationsFactory.getAnnotation(river, km); |
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74 |
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75 if (annotation != null) { |
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76 FastAnnotations.Annotation fa = |
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77 new FastAnnotations.Annotation( |
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78 km, Double.NaN, |
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79 annotation.getPosition().getValue(), null, null, |
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80 Double.NaN, Double.NaN); |
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81 return new FastAnnotations( |
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82 new FastAnnotations.Annotation [] { fa }); |
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83 } |
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84 |
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85 return new FastAnnotations(new FastAnnotations.Annotation[0]); |
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86 } |
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87 |
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88 long startTime = System.currentTimeMillis(); |
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89 |
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90 FastAnnotations fas = new FastAnnotations(river); |
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91 |
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92 long stopTime = System.currentTimeMillis(); |
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93 |
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94 if (log.isDebugEnabled()) { |
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95 log.debug("Loading locations took " + |
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96 (stopTime-startTime)/1000f + " secs."); |
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97 } |
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98 |
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99 return fas; |
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100 } |
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101 } |
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102 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |