view artifacts/src/main/java/org/dive4elements/river/artifacts/model/LocationProvider.java @ 8605:b0e5a2ce0b09

(issue1750) Fix id handling with oracle On oracle the id is returned as BigDecimal. This could probably be done better with hibernate but checking the Object also works.
author Andre Heinecke <andre.heinecke@intevation.de>
date Fri, 20 Mar 2015 18:42:00 +0100
parents af13ceeba52a
children 0a5239a1e46e
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/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
 * Software engineering by Intevation GmbH
 *
 * This file is Free Software under the GNU AGPL (>=v3)
 * and comes with ABSOLUTELY NO WARRANTY! Check out the
 * documentation coming with Dive4Elements River for details.
 */

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 :

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