Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/LocationProvider.java @ 4241:49cb65d5932d
Improved the historical discharge calculation.
The calculation now creates new HistoricalWQKms (new subclass of WQKms). Those WQKms are used
to create new facets from (new) type 'HistoricalDischargeCurveFacet'. The chart generator is
improved to support those facets.
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Wed, 24 Oct 2012 14:34:35 +0200 |
parents | efb067ab2ca4 |
children |
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package de.intevation.flys.artifacts.model; import net.sf.ehcache.Cache; import net.sf.ehcache.Element; import org.apache.log4j.Logger; import de.intevation.flys.model.Annotation; import de.intevation.flys.model.FastAnnotations; import de.intevation.flys.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 :