--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/sq/StaticSQFactory.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,123 @@
+package org.dive4elements.river.artifacts.model.sq;
+
+import java.math.BigDecimal;
+import java.util.Date;
+import java.util.List;
+
+import net.sf.ehcache.Cache;
+import net.sf.ehcache.Element;
+
+import org.apache.log4j.Logger;
+import org.hibernate.Query;
+import org.hibernate.Session;
+
+import org.dive4elements.river.artifacts.cache.CacheFactory;
+import org.dive4elements.river.backend.SessionHolder;
+
+
+public class StaticSQFactory
+{
+    private static final Logger log =
+        Logger.getLogger(StaticSQFactory.class);
+
+    public static final String SQL_SQ =
+        "SELECT " +
+            "sq.description AS description,"+
+            "ti.start_time  AS start_time," +
+            "ti.stop_time    AS stop_time, " +
+            "ms.name AS station_name, " +
+            "ms.station AS station_km, " +
+            "ms.measurement_type AS measurement_type, " +
+            "sqv.parameter AS parameter, " +
+            "sqv.a AS a, " +
+            "sqv.b AS b, " +
+            "sqv.qmax AS qmax " +
+        "FROM sq_relation sq " +
+            "JOIN time_intervals ti ON ti.id   = sq.time_interval_id " +
+            "JOIN rivers r ON r.id = sq.river_id " +
+            "JOIN sq_relation_value sqv ON sqv.sq_relation_id = sq.id " +
+            "JOIN measurement_station ms ON sqv.measurement_station_id = ms.id " +
+        "WHERE " +
+            "r.name = :river " +
+            "AND ms.id = :ms_id ";
+
+
+    private StaticSQFactory() {
+    }
+
+    public static StaticSQContainer getSQRelations(
+        String river,
+        int measurementStation
+    ) {
+        Cache cache = CacheFactory.getCache(StaticSQCacheKey.CACHE_NAME);
+
+        StaticSQCacheKey cacheKey;
+
+        if (cache != null) {
+            cacheKey = new StaticSQCacheKey(river, measurementStation);
+            Element element = cache.get(cacheKey);
+            if (element != null) {
+                log.debug("Got static bedheight values from cache");
+                return (StaticSQContainer)element.getValue();
+            }
+        }
+        else {
+            cacheKey = null;
+        }
+
+        StaticSQContainer values = getUncached(river, measurementStation);
+
+        if (values != null && cacheKey != null) {
+            log.debug("Store static sq relations in cache.");
+            Element element = new Element(cacheKey, values);
+            cache.put(element);
+        }
+        return values;
+    }
+
+    private static StaticSQContainer getUncached(
+        String river,
+        int measurementStation
+    ) {
+        Session session = SessionHolder.HOLDER.get();
+
+        Query query = session.createSQLQuery(SQL_SQ)
+            .addScalar("description")
+            .addScalar("start_time")
+            .addScalar("stop_time")
+            .addScalar("station_name")
+            .addScalar("station_km")
+            .addScalar("measurement_type")
+            .addScalar("parameter")
+            .addScalar("a")
+            .addScalar("b")
+            .addScalar("qmax");
+
+        query.setParameter("river", river);
+        query.setParameter("ms_id", measurementStation);
+
+        List<Object []> list = query.list();
+
+        if (list.isEmpty()) {
+            return new StaticSQContainer();
+        }
+
+        StaticSQContainer sq = new StaticSQContainer();
+        sq.setDescription((String)list.get(0)[0]);
+        sq.setStationName((String)list.get(0)[3]);
+        sq.setKm(((BigDecimal)list.get(0)[4]).doubleValue());
+
+        for (Object[] row : list) {
+            StaticSQRelation relation = new StaticSQRelation();
+            relation.setStartTime((Date)row[1]);
+            relation.setStopTime((Date)row[2]);
+            relation.setType((String)row[5]);
+            relation.setParameter((String)row[6]);
+            relation.setA(((BigDecimal)row[7]).doubleValue());
+            relation.setB(((BigDecimal)row[8]).doubleValue());
+            relation.setQmax(((BigDecimal)row[9]).doubleValue());
+            sq.addSQRelation(relation);
+        }
+        return sq;
+    }
+}