Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/LocationProvider.java @ 3318:dbe2f85bf160
merged flys-artifacts/2.8
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:14:35 +0200 |
| parents | 0f7abd95c6e2 |
| children | efb067ab2ca4 |
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| 2987:98c7a46ec5ae | 3318:dbe2f85bf160 |
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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 public class LocationProvider { | |
| 14 | |
| 15 private static final Logger log = | |
| 16 Logger.getLogger(LocationProvider.class); | |
| 17 | |
| 18 | |
| 19 public static final String CACHE_KEY = "location-provider"; | |
| 20 | |
| 21 public static final String PREFIX = "lp-"; | |
| 22 | |
| 23 | |
| 24 private LocationProvider() { | |
| 25 } | |
| 26 | |
| 27 public static String getLocation(String river, double km) { | |
| 28 | |
| 29 FastAnnotations fas = getAnnotations(river, km); | |
| 30 | |
| 31 FastAnnotations.Annotation an = fas.findByKm(km); | |
| 32 | |
| 33 return an != null ? an.getPosition() : null; | |
| 34 } | |
| 35 | |
| 36 public static FastAnnotations getAnnotations(String river) { | |
| 37 return getAnnotations(river, Double.MAX_VALUE); | |
| 38 } | |
| 39 | |
| 40 protected static FastAnnotations getAnnotations(String river, double km) { | |
| 41 | |
| 42 Cache cache = CacheFactory.getCache(CACHE_KEY); | |
| 43 | |
| 44 if (cache == null) { | |
| 45 return uncachedAnnotations(river, km); | |
| 46 } | |
| 47 | |
| 48 String key = PREFIX + river; | |
| 49 | |
| 50 Element element = cache.get(key); | |
| 51 | |
| 52 if (element != null) { | |
| 53 return (FastAnnotations)element.getValue(); | |
| 54 } | |
| 55 | |
| 56 FastAnnotations fas = uncachedAnnotations(river, Double.MAX_VALUE); | |
| 57 | |
| 58 cache.put(new Element(key, fas)); | |
| 59 | |
| 60 return fas; | |
| 61 } | |
| 62 | |
| 63 protected static FastAnnotations uncachedAnnotations( | |
| 64 String river, | |
| 65 double km | |
| 66 ) { | |
| 67 if (km != Double.MAX_VALUE) { | |
| 68 // XXX Fake it by using a standard Annotation. | |
| 69 | |
| 70 Annotation annotation = | |
| 71 AnnotationsFactory.getAnnotation(river, km); | |
| 72 | |
| 73 if (annotation != null) { | |
| 74 FastAnnotations.Annotation fa = | |
| 75 new FastAnnotations.Annotation( | |
| 76 km, Double.NaN, | |
| 77 annotation.getPosition().getValue(), null, null, | |
| 78 Double.NaN, Double.NaN); | |
| 79 return new FastAnnotations( | |
| 80 new FastAnnotations.Annotation [] { fa }); | |
| 81 } | |
| 82 | |
| 83 return new FastAnnotations(new FastAnnotations.Annotation[0]); | |
| 84 } | |
| 85 | |
| 86 long startTime = System.currentTimeMillis(); | |
| 87 | |
| 88 FastAnnotations fas = new FastAnnotations(river); | |
| 89 | |
| 90 long stopTime = System.currentTimeMillis(); | |
| 91 | |
| 92 if (log.isDebugEnabled()) { | |
| 93 log.debug("Loading locations took " + | |
| 94 (stopTime-startTime)/1000f + " secs."); | |
| 95 } | |
| 96 | |
| 97 return fas; | |
| 98 } | |
| 99 } | |
| 100 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |