--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/org/dive4elements/river/artifacts/model/minfo/BedHeightFactory.java	Thu Apr 25 12:06:39 2013 +0200
@@ -0,0 +1,178 @@
+package org.dive4elements.river.artifacts.model.minfo;
+
+
+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.SQLQuery;
+import org.hibernate.Session;
+import org.hibernate.type.StandardBasicTypes;
+
+import org.dive4elements.river.artifacts.cache.CacheFactory;
+import org.dive4elements.river.artifacts.model.StaticBedHeightCacheKey;
+import org.dive4elements.river.backend.SessionHolder;
+
+public class BedHeightFactory {
+    /** Private logger to use here. */
+    private static Logger log = Logger.getLogger(BedHeightFactory.class);
+
+    /** Query to get km and ws for wst_id and column_pos. */
+    public static final String SQL_SELECT_SINGLE =
+        "SELECT bhsv.height, bhsv.station, bhsv.data_gap, bhsv.sounding_width, bhs.year " +
+        "   FROM bed_height_single bhs" +
+        "       JOIN bed_height_single_values bhsv on bhsv.bed_height_single_id = bhs.id" +
+        "   WHERE bhs.id = :height_id";
+
+    /** Query to get name for wst_id and column_pos. */
+    public static final String SQL_SELECT_EPOCH =
+        "SELECT bv.height, bv.station, ti.start_time, ti.stop_time" +
+        "   FROM bed_height_epoch b" +
+        "       JOIN bed_height_epoch_values bv ON b.id = bv.bed_height_epoch_id" +
+        "       JOIN time_intervals ti ON b.time_interval_id = ti.id" +
+        "   WHERE b.id = :height_id";
+
+    /** Query to get name (description) for wst_id. */
+    public static final String SQL_SELECT_DESCR_SINGLE =
+        "SELECT description FROM bed_height_single "+
+        "WHERE id = :height_id";
+
+    /** Query to get name (description) for wst_id. */
+    public static final String SQL_SELECT_DESCR_EPOCH =
+        "SELECT description from bed_height_epoch "+
+        "WHERE id = :height_id";
+
+
+    private BedHeightFactory() {
+    }
+
+
+    /**
+     * Get WKms for given column and wst_id, caring about the cache.
+     */
+    public static BedHeight getHeight(String type, int height_id, int time) {
+        log.debug("BedHeightFactory.getHeight");
+        Cache cache = CacheFactory.getCache(StaticBedHeightCacheKey.CACHE_NAME);
+
+        StaticBedHeightCacheKey cacheKey;
+
+        if (cache != null) {
+            cacheKey = new StaticBedHeightCacheKey(height_id, time);
+            Element element = cache.get(cacheKey);
+            if (element != null) {
+                log.debug("Got static bedheight values from cache");
+                return (BedHeight)element.getValue();
+            }
+        }
+        else {
+            cacheKey = null;
+        }
+
+        BedHeight values = getBedHeightUncached(type, height_id, time);
+
+        if (values != null && cacheKey != null) {
+            log.debug("Store static bed height values in cache.");
+            Element element = new Element(cacheKey, values);
+            cache.put(element);
+        }
+        return values;
+    }
+
+    /** Get name for a WKms. */
+    public static String getHeightName(String type, int height_id) {
+        log.debug("BedHeightFactory.getHeightName height_id/" + height_id);
+
+        String name = null;
+        Session session = SessionHolder.HOLDER.get();
+
+        SQLQuery nameQuery = null;
+        if (type.equals("single")) {
+            nameQuery = session.createSQLQuery(SQL_SELECT_DESCR_SINGLE)
+                .addScalar("description", StandardBasicTypes.STRING);
+            nameQuery.setInteger("height_id", height_id);
+        }
+        else if (type.equals("epoch")) {
+            nameQuery = session.createSQLQuery(SQL_SELECT_DESCR_EPOCH)
+                .addScalar("description", StandardBasicTypes.STRING);
+            nameQuery.setInteger("height_id", height_id);
+        }
+        else {
+            return "none";
+        }
+        List<String> names = nameQuery.list();
+        if (!names.isEmpty()) {
+            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 BedHeight getBedHeightUncached(
+        String type,
+        int height_id,
+        int time)
+    {
+        if (log.isDebugEnabled()) {
+            log.debug("BedHeightFactory.getBedHeightUncached");
+        }
+
+        Session session = SessionHolder.HOLDER.get();
+        SQLQuery sqlQuery = null;
+        if (type.equals("single")) {
+            BedHeightSingle height =
+                new BedHeightSingle(getHeightName(type, height_id));
+            sqlQuery = session.createSQLQuery(SQL_SELECT_SINGLE)
+                .addScalar("height", StandardBasicTypes.DOUBLE)
+                .addScalar("station", StandardBasicTypes.DOUBLE)
+                .addScalar("data_gap", StandardBasicTypes.DOUBLE)
+                .addScalar("sounding_width", StandardBasicTypes.DOUBLE)
+                .addScalar("year", StandardBasicTypes.INTEGER);
+            sqlQuery.setInteger("height_id", height_id);
+            List<Object []> results = sqlQuery.list();
+
+            for (int i = 0; i < results.size(); i++) {
+                Object[] row = results.get(i);
+                log.debug("got station: " + (Double)row[1]);
+                height.add(
+                    (Double) row[0],
+                    (Double) row[1],
+                    (Double) row[2],
+                    (Double) row[3],
+                    (Integer) row[4]);
+            }
+            return height;
+        }
+        else if (type.equals("epoch")) {
+            BedHeightEpoch height =
+                new BedHeightEpoch(getHeightName(type, height_id));
+            sqlQuery = session.createSQLQuery(SQL_SELECT_EPOCH)
+                .addScalar("height", StandardBasicTypes.DOUBLE)
+                .addScalar("station", StandardBasicTypes.DOUBLE)
+                .addScalar("start_time", StandardBasicTypes.DATE)
+                .addScalar("stop_time", StandardBasicTypes.DATE);
+            sqlQuery.setInteger("height_id", height_id);
+            List<Object []> results = sqlQuery.list();
+
+            for (Object [] row: results) {
+                height.add(
+                    (Double) row[0],
+                    (Double) row[1],
+                    (Date)   row[2],
+                    (Date)   row[3]);
+            }
+            return height;
+        }
+        return new BedHeight();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :