Mercurial > dive4elements > river
comparison artifacts/src/main/java/org/dive4elements/river/artifacts/model/LocationProvider.java @ 5838:5aa05a7a34b7
Rename modules to more fitting names.
| author | Sascha L. Teichmann <teichmann@intevation.de> |
|---|---|
| date | Thu, 25 Apr 2013 15:23:37 +0200 |
| parents | flys-artifacts/src/main/java/org/dive4elements/river/artifacts/model/LocationProvider.java@bd047b71ab37 |
| children | 4897a58c8746 |
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| 5837:d9901a08d0a6 | 5838:5aa05a7a34b7 |
|---|---|
| 1 package org.dive4elements.river.artifacts.model; | |
| 2 | |
| 3 import net.sf.ehcache.Cache; | |
| 4 import net.sf.ehcache.Element; | |
| 5 | |
| 6 import org.apache.log4j.Logger; | |
| 7 | |
| 8 import org.dive4elements.river.model.Annotation; | |
| 9 import org.dive4elements.river.model.FastAnnotations; | |
| 10 | |
| 11 import org.dive4elements.river.artifacts.cache.CacheFactory; | |
| 12 | |
| 13 | |
| 14 /** Make FastAnnotations (db unbound) available. */ | |
| 15 public class LocationProvider { | |
| 16 | |
| 17 private static final Logger log = | |
| 18 Logger.getLogger(LocationProvider.class); | |
| 19 | |
| 20 | |
| 21 public static final String CACHE_KEY = "location-provider"; | |
| 22 | |
| 23 public static final String PREFIX = "lp-"; | |
| 24 | |
| 25 | |
| 26 private LocationProvider() { | |
| 27 } | |
| 28 | |
| 29 public static String getLocation(String river, double km) { | |
| 30 | |
| 31 FastAnnotations fas = getAnnotations(river, km); | |
| 32 | |
| 33 FastAnnotations.Annotation an = fas.findByKm(km); | |
| 34 | |
| 35 return an != null ? an.getPosition() : null; | |
| 36 } | |
| 37 | |
| 38 public static FastAnnotations getAnnotations(String river) { | |
| 39 return getAnnotations(river, Double.MAX_VALUE); | |
| 40 } | |
| 41 | |
| 42 protected static FastAnnotations getAnnotations(String river, double km) { | |
| 43 // TODO issue880: Make annotations available _per type_ | |
| 44 | |
| 45 Cache cache = CacheFactory.getCache(CACHE_KEY); | |
| 46 | |
| 47 if (cache == null) { | |
| 48 return uncachedAnnotations(river, km); | |
| 49 } | |
| 50 | |
| 51 String key = PREFIX + river; | |
| 52 | |
| 53 Element element = cache.get(key); | |
| 54 | |
| 55 if (element != null) { | |
| 56 return (FastAnnotations)element.getValue(); | |
| 57 } | |
| 58 | |
| 59 FastAnnotations fas = uncachedAnnotations(river, Double.MAX_VALUE); | |
| 60 | |
| 61 cache.put(new Element(key, fas)); | |
| 62 | |
| 63 return fas; | |
| 64 } | |
| 65 | |
| 66 protected static FastAnnotations uncachedAnnotations( | |
| 67 String river, | |
| 68 double km | |
| 69 ) { | |
| 70 if (km != Double.MAX_VALUE) { | |
| 71 // XXX Fake it by using a standard Annotation. | |
| 72 | |
| 73 Annotation annotation = | |
| 74 AnnotationsFactory.getAnnotation(river, km); | |
| 75 | |
| 76 if (annotation != null) { | |
| 77 FastAnnotations.Annotation fa = | |
| 78 new FastAnnotations.Annotation( | |
| 79 km, Double.NaN, | |
| 80 annotation.getPosition().getValue(), null, null, | |
| 81 Double.NaN, Double.NaN); | |
| 82 return new FastAnnotations( | |
| 83 new FastAnnotations.Annotation [] { fa }); | |
| 84 } | |
| 85 | |
| 86 return new FastAnnotations(new FastAnnotations.Annotation[0]); | |
| 87 } | |
| 88 | |
| 89 long startTime = System.currentTimeMillis(); | |
| 90 | |
| 91 FastAnnotations fas = new FastAnnotations(river); | |
| 92 | |
| 93 long stopTime = System.currentTimeMillis(); | |
| 94 | |
| 95 if (log.isDebugEnabled()) { | |
| 96 log.debug("Loading locations took " + | |
| 97 (stopTime-startTime)/1000f + " secs."); | |
| 98 } | |
| 99 | |
| 100 return fas; | |
| 101 } | |
| 102 } | |
| 103 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |