view flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/FastCrossSectionLineFactory.java @ 4655:cd44d28d0fbc

Move the access to artifact data to the Access object Use BedHeightAccess class to receive the data from the artifact. This abstracts the data access from the actual artifact.
author Björn Ricks <bjoern.ricks@intevation.de>
date Tue, 11 Dec 2012 09:44:04 +0100
parents d626ae185305
children
line wrap: on
line source
package de.intevation.flys.artifacts.model;

import de.intevation.flys.artifacts.cache.CacheFactory;

import de.intevation.flys.model.CrossSection;

import de.intevation.flys.model.FastCrossSectionLine;

import net.sf.ehcache.Cache;
import net.sf.ehcache.Element;

import java.util.List;

import org.apache.log4j.Logger;

public class FastCrossSectionLineFactory
{
    private static Logger log =
        Logger.getLogger(FastCrossSectionLineFactory.class);

    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);

        boolean debug = log.isDebugEnabled();

        if (cache == null) {
            if (debug) {
                log.debug("No cross section chunk cache configured.");
            }
            List<FastCrossSectionLine> lines = cs.getFastLines(km, km);
            return lines.isEmpty() ? null : lines.get(0);
        }

        String cacheKey = FastCrossSectionChunk.createHashKey(cs, km);

        Element element = cache.get(cacheKey);

        FastCrossSectionChunk fcsc;

        if (element != null) {
            if (debug) {
                log.debug("Found cross section chunk in cache id: " +
                    cs.getId() + " km: " + km);
            }

            fcsc = (FastCrossSectionChunk)element.getValue();
        }
        else {
            if (debug) {
                log.debug("Not found cross section chunk in cache id: " +
                    cs.getId() + " km: " + km + " -> loading");
            }
            fcsc = new FastCrossSectionChunk(cs, km);
            element = new Element(cacheKey, fcsc);
            cache.put(element);
        }

        return fcsc.getCrossSectionLine(km);
    }
}
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