--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/WQDay.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,77 @@
+package org.dive4elements.river.artifacts.model;
+
+import gnu.trove.TIntArrayList;
+
+/**
+ * This class represents a pool of data triples that consists of 'W', 'Q' and
+ * 'Day' data.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class WQDay
+extends      WQ
+{
+    protected TIntArrayList days;
+
+    public WQDay() {
+        super("");
+        days = new TIntArrayList();
+    }
+
+    public WQDay(int capacity) {
+        super(capacity);
+        days = new TIntArrayList(capacity);
+    }
+
+    public WQDay(int [] days, double [] ws, double [] qs) {
+        super(qs, ws, "");
+        this.days = new TIntArrayList(days);
+    }
+
+
+    public void add(int day, double w, double q) {
+        super.add(w, q);
+        days.add(day);
+    }
+
+
+    public boolean isIncreasing() {
+        int lo = getDay(0);
+        int hi = getDay(size()-1);
+
+        return lo < hi;
+    }
+
+
+    public int getDay(int idx) {
+        return days.getQuick(idx);
+    }
+
+    @Override
+    public void removeNaNs() {
+
+        int dest = 0;
+        int N = ws.size();
+
+        for (int i = 0; i < N; ++i) {
+            double wi = ws.getQuick(i);
+            double qi = qs.getQuick(i);
+
+            if (Double.isNaN(wi) || Double.isNaN(qi)) {
+                continue;
+            }
+
+            days.setQuick(dest, days.getQuick(i));
+            ws.setQuick(dest, wi);
+            qs.setQuick(dest, qi);
+            ++dest;
+        }
+
+        if (dest < N) {
+            days.remove(dest, N-dest);
+            ws  .remove(dest, N-dest);
+            qs  .remove(dest, N-dest);
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :