--- a/flys-artifacts/ChangeLog	Thu Feb 02 16:38:12 2012 +0000
+++ b/flys-artifacts/ChangeLog	Thu Feb 02 16:39:50 2012 +0000
@@ -1,3 +1,8 @@
+2012-02-02  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/HistoricalDischargeCurveGenerator.java:
+	  Create new AxisDatasets and new TimeSeriesCollections for each Facet.
+
 2012-02-02  Ingo Weinzierl <ingo@intevation.de>
 
 	* src/main/java/de/intevation/flys/artifacts/model/WQTimerange.java: Added a

--- a/flys-artifacts/src/main/java/de/intevation/flys/exports/HistoricalDischargeCurveGenerator.java	Thu Feb 02 16:38:12 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/HistoricalDischargeCurveGenerator.java	Thu Feb 02 16:39:50 2012 +0000
@@ -1,6 +1,7 @@
 package de.intevation.flys.exports;
 
 import java.awt.Font;
+import java.util.Date;
 
 import org.w3c.dom.Document;
 
@@ -9,10 +10,18 @@
 import org.jfree.chart.JFreeChart;
 import org.jfree.chart.axis.NumberAxis;
 
+import org.jfree.data.general.SeriesException;
+import org.jfree.data.time.Minute;
+import org.jfree.data.time.RegularTimePeriod;
+import org.jfree.data.time.TimeSeries;
+import org.jfree.data.time.TimeSeriesCollection;
+
 import de.intevation.artifactdatabase.state.ArtifactAndFacet;
 
 import de.intevation.flys.artifacts.FLYSArtifact;
 import de.intevation.flys.artifacts.model.FacetTypes;
+import de.intevation.flys.artifacts.model.Timerange;
+import de.intevation.flys.artifacts.model.WQTimerange;
 
 
 /**
@@ -135,6 +144,69 @@
     {
         logger.debug("doHistoricalDischargeOut(): description = " + desc);
         logger.warn("TODO IMPLEMENT ME");
+
+        WQTimerange wqt = (WQTimerange) data;
+
+        TimeSeriesCollection tsc = newTimeSeriesCollection(wqt, desc);
+
+        addAxisDataset(tsc, 0, visible);
+    }
+
+
+    /**
+     * Creates a new TimeSeriesCollection with a single TimeSeries. The
+     * TimeSeries will consist of two RegularTimePeriods for each W/Q value
+     * provided by <i>wqt</i>. This has the effect, that the line in the chart
+     * looks like a "step chart".
+     */
+    protected TimeSeriesCollection newTimeSeriesCollection(
+        WQTimerange wqt,
+        String      desc
+    ) {
+        logger.debug("Create new TimeSeriesCollection for: " + desc);
+
+        TimeSeriesCollection tsc = new TimeSeriesCollection();
+        TimeSeries        series = new TimeSeries(desc);
+
+        Timerange tr = null;
+        double[] res = new double[2];
+
+        for (int i = 0, n = wqt.size(); i < n; i++) {
+            res = wqt.get(i, res);
+
+            RegularTimePeriod[] rtp = newRegularTimePeriod(wqt.getTimerange(i));
+
+            try {
+                // TODO WHICH (W/Q) IS REQUIRED?
+                series.add(rtp[0], res[1]);
+                series.add(rtp[1], res[1]);
+            }
+            catch (SeriesException se) {
+                logger.warn("Error while adding TimePeriod: " + se);
+            }
+        }
+
+        tsc.addSeries(series);
+
+        return tsc;
+    }
+
+
+    /**
+     * Creates an array that consists of two <i>Minute</i> periods [start, end].
+     *
+     * @param timerange Supports start and end time.
+     *
+     * @return an array with two <i>Minute</i> periods [start, end].
+     */
+    protected RegularTimePeriod[] newRegularTimePeriod(Timerange timerange) {
+        Date start = new Date(timerange.getStart());
+        Date end   = new Date(timerange.getEnd() - 1000 * 60);
+
+        return new RegularTimePeriod[] {
+            new Minute(start),
+            new Minute(end)
+        };
     }
 }
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