Mercurial > dive4elements > river
diff 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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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WKmsFactory.java Tue Oct 18 12:44:02 2011 +0000 @@ -0,0 +1,116 @@ +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 :