Mercurial > dive4elements > river
diff flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WKmsFactory.java @ 3786:4adc35aa655c
merged flys-artifacts/2.9.1
author | Thomas Arendsen Hein <thomas@intevation.de> |
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date | Fri, 28 Sep 2012 12:14:47 +0200 |
parents | cd5eb8f5f6f1 |
children | 58bdf95df5e4 |
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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 Fri Sep 28 12:14:47 2012 +0200 @@ -0,0 +1,157 @@ +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.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 logger to use here. */ + private static Logger log = Logger.getLogger(WKmsFactory.class); + + /** 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"; + + /** Query to get name for wst_id and column_pos. */ + public static final String SQL_SELECT_NAME = + "SELECT name " + + "FROM wst_columns "+ + "WHERE wst_id = :wst_id AND position = :column_pos"; + + /** Query to get name (description) for wst_id. */ + public static final String SQL_SELECT_WST_NAME = + "SELECT description from wsts "+ + "WHERE id = :wst_id"; + + + private WKmsFactory() { + } + + + /** + * Get WKms for given column and wst_id, caring about the cache. + */ + public static WKms getWKms(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(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 name for a WKms. */ + public static String getWKmsName(int wst_id) { + log.debug("WKmsFactory.getWKmsName wst_id/" + wst_id); + + String name = null; + Session session = SessionHolder.HOLDER.get(); + + SQLQuery nameQuery = session.createSQLQuery(SQL_SELECT_WST_NAME) + .addScalar("description", StandardBasicTypes.STRING); + nameQuery.setInteger("wst_id", wst_id); + + List<String> names = nameQuery.list(); + if (names.size() >= 1) { + name = names.get(0); + } + + return name; + } + + /** Get name for a WKms. */ + public static String getWKmsName(int column, int wst_id) { + log.debug("WKmsFactory.getWKmsName c/" + column + ", wst_id/" + wst_id); + + String name = null; + Session session = SessionHolder.HOLDER.get(); + + SQLQuery nameQuery = session.createSQLQuery(SQL_SELECT_NAME) + .addScalar("name", StandardBasicTypes.STRING); + nameQuery.setInteger("wst_id", wst_id); + nameQuery.setInteger("column_pos", column); + + List<String> names = nameQuery.list(); + if (names.size() >= 1) { + name = names.get(0); + } + + return name; + } + + + /** + * Get WKms from db. + * @param column the position columns value + * @param wst_id database id of the wst + * @return according WKms. + */ + public static WKms getWKmsUncached(int column, int wst_id) { + + if (log.isDebugEnabled()) { + log.debug("WKmsFactory.getWKmsUncached c/" + column + ", wst_id/" + wst_id); + } + + WKmsImpl wkms = new WKmsImpl(getWKmsName(column, 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(); + + double kms [] = new double[results.size()]; + double ws [] = new double[results.size()]; + + int lastColumn = Integer.MAX_VALUE; + + for (int i = 0, N = results.size(); i < N; 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 :