Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WKmsFactory.java @ 1722:fb4fb1c67c35
Added WKmsFactory.
flys-artifacts/trunk@3004 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Tue, 18 Oct 2011 12:44:02 +0000 |
parents | |
children | e3b9164a85fe |
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package de.intevation.flys.artifacts.model; import java.util.List; import net.sf.ehcache.Cache; import net.sf.ehcache.Element; import org.apache.log4j.Logger; import org.hibernate.Session; import org.hibernate.SQLQuery; import org.hibernate.type.StandardBasicTypes; import de.intevation.flys.artifacts.model.WKms; import de.intevation.flys.artifacts.model.WKmsImpl; import de.intevation.flys.artifacts.cache.CacheFactory; import de.intevation.flys.backend.SessionHolder; /** * Factory to access ready-made WKms for other (than computed) 'kinds' of * WST-data. */ public class WKmsFactory { private static Logger log = Logger.getLogger(WKmsFactory.class); /** * Value for wsts 'kind' typically used for "additional * longitudinal sections. */ public static final int KIND_ZUS = 1; /** * Value for wsts 'kind' typically used for flood protection measures * (e.g. dikes). */ public static final int KIND_PROTECTION = 5; /** Query to get km and ws for wst_id and column_pos. */ public static final String SQL_SELECT_WS = "SELECT km, w FROM wst_w_values " + "WHERE wst_id = :wst_id AND column_pos = :column_pos"; private WKmsFactory() { } /** * Get WKms for given column and wst_id, caring about the cache. */ public static WKms getWKms(int kind, int column, int wst_id) { log.debug("WKmsFactory.getWKms"); Cache cache = CacheFactory.getCache(StaticWKmsCacheKey.CACHE_NAME); StaticWKmsCacheKey cacheKey; if (cache != null) { cacheKey = new StaticWKmsCacheKey(wst_id, column); Element element = cache.get(cacheKey); if (element != null) { log.debug("Got static wst values from cache"); return (WKms)element.getValue(); } } else { cacheKey = null; } WKms values = getWKmsUncached(kind, column, wst_id); if (values != null && cacheKey != null) { log.debug("Store static wst values in cache."); Element element = new Element(cacheKey, values); cache.put(element); } return values; } /** * Get WKms from db. */ public static WKms getWKmsUncached(int kind, int column, int wst_id) { log.debug("WKmsFactory.getWKmsUncached c/" + column + ", wst_id/" + wst_id); Session session = SessionHolder.HOLDER.get(); SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_WS) .addScalar("km", StandardBasicTypes.DOUBLE) .addScalar("w", StandardBasicTypes.DOUBLE); sqlQuery.setInteger("wst_id", wst_id); sqlQuery.setInteger("column_pos", column); List<Object []> results = sqlQuery.list(); // TODO Fetch name in a separate query. String name = "todo"; WKmsImpl wkms = new WKmsImpl(name); double kms [] = new double[results.size()]; double ws [] = new double[results.size()]; int lastColumn = Integer.MAX_VALUE; for (int i = 0; i < results.size(); i++) { Object[] row = results.get(i); wkms.add((Double) row[0], (Double) row[1]); } return wkms; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :