Mercurial > dive4elements > river
view 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> |
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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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package org.dive4elements.river.artifacts.model; import net.sf.ehcache.Cache; import net.sf.ehcache.Element; import org.apache.log4j.Logger; import org.dive4elements.river.model.Annotation; import org.dive4elements.river.model.FastAnnotations; import org.dive4elements.river.artifacts.cache.CacheFactory; /** Make FastAnnotations (db unbound) available. */ public class LocationProvider { private static final Logger log = Logger.getLogger(LocationProvider.class); public static final String CACHE_KEY = "location-provider"; public static final String PREFIX = "lp-"; private LocationProvider() { } public static String getLocation(String river, double km) { FastAnnotations fas = getAnnotations(river, km); FastAnnotations.Annotation an = fas.findByKm(km); return an != null ? an.getPosition() : null; } public static FastAnnotations getAnnotations(String river) { return getAnnotations(river, Double.MAX_VALUE); } protected static FastAnnotations getAnnotations(String river, double km) { // TODO issue880: Make annotations available _per type_ Cache cache = CacheFactory.getCache(CACHE_KEY); if (cache == null) { return uncachedAnnotations(river, km); } String key = PREFIX + river; Element element = cache.get(key); if (element != null) { return (FastAnnotations)element.getValue(); } FastAnnotations fas = uncachedAnnotations(river, Double.MAX_VALUE); cache.put(new Element(key, fas)); return fas; } protected static FastAnnotations uncachedAnnotations( String river, double km ) { if (km != Double.MAX_VALUE) { // XXX Fake it by using a standard Annotation. Annotation annotation = AnnotationsFactory.getAnnotation(river, km); if (annotation != null) { FastAnnotations.Annotation fa = new FastAnnotations.Annotation( km, Double.NaN, annotation.getPosition().getValue(), null, null, Double.NaN, Double.NaN); return new FastAnnotations( new FastAnnotations.Annotation [] { fa }); } return new FastAnnotations(new FastAnnotations.Annotation[0]); } long startTime = System.currentTimeMillis(); FastAnnotations fas = new FastAnnotations(river); long stopTime = System.currentTimeMillis(); if (log.isDebugEnabled()) { log.debug("Loading locations took " + (stopTime-startTime)/1000f + " secs."); } return fas; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :