teichmann@5831: package org.dive4elements.river.artifacts.model;
sascha@2119: 
teichmann@5831: import org.dive4elements.river.artifacts.cache.CacheFactory;
sascha@2119: 
teichmann@5831: import org.dive4elements.river.model.CrossSection;
sascha@2126: 
teichmann@5831: import org.dive4elements.river.model.FastCrossSectionLine;
sascha@2119: 
sascha@2119: import net.sf.ehcache.Cache;
sascha@2119: import net.sf.ehcache.Element;
sascha@2119: 
sascha@2119: import java.util.List;
sascha@2119: 
sascha@2126: import org.apache.log4j.Logger;
sascha@2119: 
sascha@2119: public class FastCrossSectionLineFactory
sascha@2119: {
sascha@2126:     private static Logger log =
sascha@2126:         Logger.getLogger(FastCrossSectionLineFactory.class);
sascha@2126: 
sascha@2119:     public static final String CACHE_NAME = "fast-cross-section-lines";
sascha@2119: 
sascha@2119:     private FastCrossSectionLineFactory() {
sascha@2119:     }
sascha@2119: 
sascha@2119:     public static FastCrossSectionLine getCrossSectionLine(
sascha@2119:         CrossSection cs,
sascha@2119:         double       km
sascha@2119:     ) {
sascha@2119:         Cache cache = CacheFactory.getCache(CACHE_NAME);
sascha@2119: 
sascha@2126:         boolean debug = log.isDebugEnabled();
sascha@2126: 
sascha@2119:         if (cache == null) {
sascha@2126:             if (debug) {
sascha@2126:                 log.debug("No cross section chunk cache configured.");
sascha@2126:             }
sascha@2126:             List<FastCrossSectionLine> lines = cs.getFastLines(km, km);
sascha@2126:             return lines.isEmpty() ? null : lines.get(0);
sascha@2119:         }
sascha@2119: 
sascha@2119:         String cacheKey = FastCrossSectionChunk.createHashKey(cs, km);
sascha@2119: 
sascha@2119:         Element element = cache.get(cacheKey);
sascha@2119: 
sascha@2119:         FastCrossSectionChunk fcsc;
sascha@2119: 
sascha@2119:         if (element != null) {
sascha@2126:             if (debug) {
sascha@2126:                 log.debug("Found cross section chunk in cache id: " +
sascha@2126:                     cs.getId() + " km: " + km);
sascha@2126:             }
sascha@2126: 
sascha@2119:             fcsc = (FastCrossSectionChunk)element.getValue();
sascha@2119:         }
sascha@2119:         else {
sascha@2126:             if (debug) {
sascha@2126:                 log.debug("Not found cross section chunk in cache id: " +
sascha@2126:                     cs.getId() + " km: " + km + " -> loading");
sascha@2126:             }
sascha@2119:             fcsc = new FastCrossSectionChunk(cs, km);
sascha@2119:             element = new Element(cacheKey, fcsc);
sascha@2119:             cache.put(element);
sascha@2119:         }
sascha@2119: 
sascha@2119:         return fcsc.getCrossSectionLine(km);
sascha@2119:     }
sascha@2119: }
sascha@2119: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :