--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/org/dive4elements/river/artifacts/states/GaugeTimerangeState.java	Thu Apr 25 12:06:39 2013 +0200
@@ -0,0 +1,94 @@
+package org.dive4elements.river.artifacts.states;
+
+import java.util.Calendar;
+import java.util.List;
+
+import org.apache.log4j.Logger;
+import org.hibernate.SQLQuery;
+import org.hibernate.Session;
+import org.hibernate.type.StandardBasicTypes;
+
+import org.dive4elements.river.artifacts.FLYSArtifact;
+import org.dive4elements.river.backend.SessionHolder;
+import org.dive4elements.river.model.Gauge;
+import org.dive4elements.river.utils.FLYSUtils;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class GaugeTimerangeState extends IntRangeState {
+
+    /** Private logger. */
+    private static final Logger logger =
+            Logger.getLogger(GaugeTimerangeState.class);
+
+
+    /** Get 'min' and 'max'times of gauge time intervals. */
+    protected long[] getLowerUpper(FLYSArtifact flys) {
+        Gauge gauge = FLYSUtils.getReferenceGauge(flys);
+
+        if (gauge == null) {
+            logger.warn("No reference gauge specified!");
+            return new long[] { 0, 0 };
+        }
+
+        Session session = SessionHolder.HOLDER.get();
+
+        SQLQuery query = session.createSQLQuery(
+                "SELECT min(start_time) as min, max(stop_time) as max " +
+                        "FROM time_intervals WHERE id in " +
+                        "(SELECT time_interval_id FROM discharge_tables " +
+                "WHERE gauge_id =:gid)");
+
+        query.addScalar("min", StandardBasicTypes.CALENDAR);
+        query.addScalar("max", StandardBasicTypes.CALENDAR);
+
+        query.setInteger("gid", gauge.getId());
+
+        List<?> results = query.list();
+
+        if (results != null) {
+            Object[] res = (Object[]) results.get(0);
+
+            Calendar lo = (Calendar) res[0];
+            Calendar up = (Calendar) res[1];
+
+            if (lo != null && up != null) {
+                return new long[] { lo.getTimeInMillis(), up.getTimeInMillis() };
+            }
+        }
+
+        logger.warn("Could not determine time range for gauge: " + gauge);
+
+        return null;
+    }
+
+
+    @Override
+    protected Object getLower(FLYSArtifact flys) {
+        long[] lowerUpper = getLowerUpper(flys);
+
+        return lowerUpper != null ? lowerUpper[0] : 0;
+    }
+
+
+    @Override
+    protected Object getUpper(FLYSArtifact flys) {
+        long[] lowerUpper = getLowerUpper(flys);
+
+        return lowerUpper != null ? lowerUpper[1] : 0;
+    }
+
+
+    @Override
+    protected String getUIProvider() {
+        return "gaugetimerange";
+    }
+
+    @Override
+    protected String getType() {
+        return "longrange";
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :