--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/GaugesFactory.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,70 @@
+package org.dive4elements.river.artifacts.model;
+
+import java.util.List;
+import java.util.ArrayList;
+
+import org.dive4elements.river.backend.SessionHolder;
+import org.dive4elements.river.model.River;
+import org.dive4elements.river.model.Gauge;
+import org.dive4elements.river.model.Range;
+
+import org.hibernate.Session;
+import org.hibernate.Query;
+
+public class GaugesFactory
+{
+    public static List<Gauge> getGauges(River river) {
+        return getGauges(river.getName());
+    }
+
+
+    public static Gauge getGauge(String gaugeName) {
+        Session session = SessionHolder.HOLDER.get();
+        Query query = session.createQuery(
+            "from Gauge where name=:name");
+        query.setParameter("name", gaugeName);
+
+        List<Gauge> res = query.list();
+
+        return res.isEmpty() ? null : res.get(0);
+    }
+
+
+    public static List<Gauge> getGauges(String river) {
+        Session session = SessionHolder.HOLDER.get();
+        Query query = session.createQuery(
+            "from Gauge where river.name=:name");
+        query.setParameter("name", river);
+        return query.list();
+    }
+
+    public static List<Gauge> filterRanges(
+        List<Gauge>     gauges,
+        List<double []> ranges
+    ) {
+        // XXX: Inefficent!
+        ArrayList<Range> rs = new ArrayList<Range>();
+        for (double [] range: ranges) {
+            double a = range[0];
+            double b = range[1];
+            rs.add(new Range(Math.min(a, b), Math.max(a, b), null));
+        }
+        return filter(gauges, rs);
+    }
+
+    public static List<Gauge> filter(List<Gauge> gauges, List<Range> ranges) {
+        // TODO: Make it an HQL filter!
+        ArrayList<Gauge> out = new ArrayList<Gauge>();
+        for (Gauge gauge: gauges) {
+            Range range = gauge.getRange();
+            for (Range cmp: ranges) {
+                if (range.intersects(cmp)) {
+                    out.add(gauge);
+                    break;
+                }
+            }
+        }
+        return out;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :