--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/process/SQRelationProcessor.java	Fri Oct 04 17:00:05 2013 +0200
@@ -0,0 +1,110 @@
+/* Copyright (C) 2013 by Bundesanstalt für Gewässerkunde
+ * Software engineering by Intevation GmbH
+ *
+ * This file is Free Software under the GNU AGPL (>=v3)
+ * and comes with ABSOLUTELY NO WARRANTY! Check out the
+ * documentation coming with Dive4Elements River for details.
+ */
+
+package org.dive4elements.river.exports.process;
+
+import org.apache.log4j.Logger;
+import org.jfree.data.xy.XYSeries;
+
+import org.dive4elements.artifactdatabase.state.ArtifactAndFacet;
+import org.dive4elements.artifacts.CallContext;
+import org.dive4elements.river.exports.DiagramGenerator;
+import org.dive4elements.river.jfree.StyledXYSeries;
+import org.dive4elements.river.themes.ThemeDocument;
+import org.dive4elements.river.artifacts.model.FacetTypes;
+
+import org.dive4elements.river.jfree.JFreeUtil;
+
+import org.dive4elements.river.artifacts.model.sq.SQ;
+import org.dive4elements.river.artifacts.model.sq.SQFunction;
+
+public class SQRelationProcessor extends DefaultProcessor {
+
+    public static final String I18N_AXIS_LABEL =
+        "chart.sq_relation.yaxis.label";
+    public static final String I18N_AXIS_LABEL_DEFAULT =
+        "";
+
+    private final static Logger logger =
+            Logger.getLogger(SQRelationProcessor.class);
+
+    @Override
+    public void doOut(
+            DiagramGenerator generator,
+            ArtifactAndFacet bundle,
+            ThemeDocument    theme,
+            boolean          visible) {
+        CallContext context = generator.getCallContext();
+        String facetName = bundle.getFacetName();
+        XYSeries series;
+        Object data = bundle.getData(context);
+        String desc = bundle.getFacetDescription();
+
+        if (data == null) {
+            // Check has been here before so we keep it but
+            // this should never happen.
+            logger.error("Data is null for facet: " + facetName);
+            return;
+        }
+
+        if (FacetTypes.IS.SQ_CURVE(facetName)) {
+            SQFunction func = (SQFunction) data;
+
+            series = JFreeUtil.sampleFunction2DPositive(
+                func.getFunction(),
+                theme,
+                desc,
+                500,
+                Math.max(func.getMinQ(), 0.01),
+                Math.max(func.getMaxQ(), 0.02));
+
+        } else if (FacetTypes.IS.SQ_MEASUREMENT(facetName) ||
+               FacetTypes.IS.SQ_OUTLIER(facetName)) {
+
+            SQ[] sqs = (SQ[]) data;
+            series = new StyledXYSeries(desc, theme);
+
+            for (SQ sq: sqs) {
+                double q = sq.getQ();
+                double s = sq.getS();
+                if (s > 0d && q > 0d) {
+                    series.add(q, s, false);
+                }
+            }
+        } else {
+            logger.error("Could not handle: " + facetName);
+            return;
+        }
+
+        if (logger.isDebugEnabled()) {
+            logger.debug("Series '" + desc + "' has "
+                + series.getItemCount() + " items.");
+
+            logger.debug("   -> min x = " + series.getMinX());
+            logger.debug("   -> max x = " + series.getMaxX());
+            logger.debug("   -> min y = " + series.getMinY());
+            logger.debug("   -> max y = " + series.getMaxY());
+        }
+
+        generator.addAxisSeries(series, axisName, visible);
+    }
+
+    @Override
+    public boolean canHandle(String facettype) {
+        return FacetTypes.IS.SQ_CURVE(facettype) ||
+            FacetTypes.IS.SQ_MEASUREMENT(facettype) ||
+            FacetTypes.IS.SQ_OUTLIER(facettype);
+    }
+
+    @Override
+    public String getAxisLabel(DiagramGenerator generator) {
+        return generator.msg(
+                I18N_AXIS_LABEL,
+                I18N_AXIS_LABEL_DEFAULT);
+    }
+}