Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/LocationProvider.java @ 3818:dc18457b1cef
merged flys-artifacts/pre2.7-2012-03-16
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:14:59 +0200 |
| parents | fe3ea0f16098 |
| children | 0f7abd95c6e2 |
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| 2456:60ab1054069d | 3818:dc18457b1cef |
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| 1 package de.intevation.flys.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 de.intevation.flys.model.Annotation; | |
| 9 import de.intevation.flys.model.FastAnnotations; | |
| 10 | |
| 11 import de.intevation.flys.artifacts.cache.CacheFactory; | |
| 12 | |
| 13 import de.intevation.flys.artifacts.model.AnnotationsFactory; | |
| 14 | |
| 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 | |
| 44 Cache cache = CacheFactory.getCache(CACHE_KEY); | |
| 45 | |
| 46 if (cache == null) { | |
| 47 return uncachedAnnotations(river, km); | |
| 48 } | |
| 49 | |
| 50 String key = PREFIX + river; | |
| 51 | |
| 52 Element element = cache.get(key); | |
| 53 | |
| 54 if (element != null) { | |
| 55 return (FastAnnotations)element.getValue(); | |
| 56 } | |
| 57 | |
| 58 FastAnnotations fas = uncachedAnnotations(river, Double.MAX_VALUE); | |
| 59 | |
| 60 cache.put(new Element(key, fas)); | |
| 61 | |
| 62 return fas; | |
| 63 } | |
| 64 | |
| 65 protected static FastAnnotations uncachedAnnotations( | |
| 66 String river, | |
| 67 double km | |
| 68 ) { | |
| 69 if (km != Double.MAX_VALUE) { | |
| 70 // XXX Fake it by using a standard Annotation. | |
| 71 | |
| 72 Annotation annotation = | |
| 73 AnnotationsFactory.getAnnotation(river, km); | |
| 74 | |
| 75 if (annotation != null) { | |
| 76 FastAnnotations.Annotation fa = | |
| 77 new FastAnnotations.Annotation( | |
| 78 km, Double.NaN, | |
| 79 annotation.getPosition().getValue(), null, null, | |
| 80 Double.NaN, Double.NaN); | |
| 81 return new FastAnnotations( | |
| 82 new FastAnnotations.Annotation [] { fa }); | |
| 83 } | |
| 84 | |
| 85 return new FastAnnotations(new FastAnnotations.Annotation[0]); | |
| 86 } | |
| 87 | |
| 88 long startTime = System.currentTimeMillis(); | |
| 89 | |
| 90 FastAnnotations fas = new FastAnnotations(river); | |
| 91 | |
| 92 long stopTime = System.currentTimeMillis(); | |
| 93 | |
| 94 if (log.isDebugEnabled()) { | |
| 95 log.debug("Loading locations took " + | |
| 96 (stopTime-startTime)/1000f + " secs."); | |
| 97 } | |
| 98 | |
| 99 return fas; | |
| 100 } | |
| 101 } | |
| 102 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |