Mercurial > dive4elements > river
diff flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/FastCrossSectionLineFactory.java @ 2119:dc28ea60b53d
Added cached/chunked access to cross section lines. TODO: Use the FastCrossSectionLines.
flys-artifacts/trunk@3689 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Mon, 16 Jan 2012 15:51:46 +0000 |
parents | |
children | d626ae185305 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/FastCrossSectionLineFactory.java Mon Jan 16 15:51:46 2012 +0000 @@ -0,0 +1,52 @@ +package de.intevation.flys.artifacts.model; + +import de.intevation.flys.artifacts.cache.CacheFactory; + +import de.intevation.flys.model.CrossSection; +import de.intevation.flys.model.CrossSectionLine; + +import net.sf.ehcache.Cache; +import net.sf.ehcache.Element; + +import java.util.List; + + +public class FastCrossSectionLineFactory +{ + public static final String CACHE_NAME = "fast-cross-section-lines"; + + private FastCrossSectionLineFactory() { + } + + public static FastCrossSectionLine getCrossSectionLine( + CrossSection cs, + double km + ) { + Cache cache = CacheFactory.getCache(CACHE_NAME); + + if (cache == null) { + List<CrossSectionLine> lines = cs.getLines(km, km); + return lines.isEmpty() + ? null + : new FastCrossSectionLine(lines.get(0)); + } + + String cacheKey = FastCrossSectionChunk.createHashKey(cs, km); + + Element element = cache.get(cacheKey); + + FastCrossSectionChunk fcsc; + + if (element != null) { + fcsc = (FastCrossSectionChunk)element.getValue(); + } + else { + fcsc = new FastCrossSectionChunk(cs, km); + element = new Element(cacheKey, fcsc); + cache.put(element); + } + + return fcsc.getCrossSectionLine(km); + } +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :