--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/minfo/PorosityFactory.java	Wed Apr 30 15:20:11 2014 +0200
@@ -0,0 +1,95 @@
+/* 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.minfo;
+
+import java.util.List;
+
+import net.sf.ehcache.Cache;
+import net.sf.ehcache.Element;
+
+import org.apache.log4j.Logger;
+import org.hibernate.SQLQuery;
+import org.hibernate.Session;
+import org.hibernate.type.StandardBasicTypes;
+
+import org.dive4elements.river.artifacts.cache.CacheFactory;
+import org.dive4elements.river.artifacts.model.StaticMorphoWidthCacheKey;
+import org.dive4elements.river.artifacts.model.StaticPorosityCacheKey;
+import org.dive4elements.river.backend.SessionHolder;
+
+
+public class PorosityFactory
+{
+    /** Private logger to use here. */
+    private static Logger log = Logger.getLogger(PorosityFactory.class);
+
+    public static final String SQL_SELECT =
+        "SELECT pv.station AS station, pv.porosity AS porosity " +
+        "   FROM porosity p" +
+        "       JOIN porosity_values pv on pv.porosity_id = p.id" +
+        "   WHERE p.id = :porosity_id";
+
+    private PorosityFactory() {
+    }
+
+
+    /**
+     * Get WKms for given column and wst_id, caring about the cache.
+     */
+    public static Porosity getPorosity(int porosity_id) {
+        log.debug("PorosityFactory.getPorosity");
+        Cache cache = CacheFactory.getCache(StaticPorosityCacheKey.CACHE_NAME);
+
+        StaticPorosityCacheKey cacheKey;
+
+        if (cache != null) {
+            cacheKey = new StaticPorosityCacheKey(porosity_id);
+            Element element = cache.get(cacheKey);
+            if (element != null) {
+                log.debug("Got static porosity values from cache");
+                return (Porosity)element.getValue();
+            }
+        }
+        else {
+            cacheKey = null;
+        }
+
+        Porosity values = getPorosityUncached(porosity_id);
+
+        if (values != null && cacheKey != null) {
+            log.debug("Store static porosity values in cache.");
+            Element element = new Element(cacheKey, values);
+            cache.put(element);
+        }
+        return values;
+    }
+
+    private static Porosity getPorosityUncached(int porosity_id) {
+        if (log.isDebugEnabled()) {
+            log.debug("PorosityFactory.getPorosityUncached");
+        }
+
+        Session session = SessionHolder.HOLDER.get();
+        SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT)
+                .addScalar("station", StandardBasicTypes.DOUBLE)
+                .addScalar("porosity", StandardBasicTypes.DOUBLE);
+        sqlQuery.setInteger("porosity_id", porosity_id);
+        List<Object []> results = sqlQuery.list();
+
+        Porosity porosities = new Porosity();
+        for (Object [] row: results) {
+            log.debug("got station: " + (Double)row[0]);
+            porosities.add(
+                (Double) row[0],
+                (Double) row[1]);
+        }
+        return porosities;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :