--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/process/QOutProcessor.java	Tue Aug 27 12:46:11 2013 +0200
@@ -0,0 +1,130 @@
+/* Copyright (C) 2011, 2012, 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.artifacts.model.FacetTypes;
+import org.dive4elements.river.artifacts.model.WKms;
+import org.dive4elements.river.artifacts.model.WQKms;
+
+import org.dive4elements.river.exports.StyledSeriesBuilder;
+import org.dive4elements.river.exports.XYChartGenerator;
+import org.dive4elements.river.jfree.StyledXYSeries;
+import org.dive4elements.river.themes.ThemeDocument;
+import org.dive4elements.river.utils.DataUtil;
+
+/**
+ * Add data to chart/generator.
+ *
+ * @author <a href="mailto:bjoern.ricks@intevation.de">Björn Ricks</a>
+ */
+public class QOutProcessor implements Processor {
+
+    /** Private logger. */
+    private static final Logger logger =
+            Logger.getLogger(QOutProcessor.class);
+
+    @Override
+    public void doOut(
+            XYChartGenerator generator,
+            ArtifactAndFacet aaf,
+            ThemeDocument    theme,
+            boolean          visible,
+            int              index)
+    {
+        CallContext context = generator.getCallContext();
+        WQKms wqkms = (WQKms) aaf.getData(context);
+
+        doQOut(generator, wqkms, aaf, theme, visible, index);
+    }
+
+    /**
+     * Returns true if facettype is q-type.
+     */
+    @Override
+    public boolean canHandle(String facetType) {
+        if (facetType == null) {
+            return false;
+        }
+
+        if (facetType.equals(FacetTypes.STATIC_WQKMS_Q)
+            || facetType.equals(FacetTypes.LONGITUDINAL_Q)) {
+            return true;
+        }
+        return false;
+    }
+
+
+    /**
+     * Process the output for Q facets in a longitudinal section curve.
+     *
+     * @param generator Generator to use.
+     * @param wqkms An array of WQKms values.
+     * @param aandf The facet and artifact. This facet does NOT support any data objects. Use
+     * D4EArtifact.getNativeFacet() instead to retrieve a Facet which supports
+     * data.
+     * @param theme The theme that contains styling information.
+     * @param visible The visibility of the curve.
+     * @param index Axis index to add data to.
+     */
+    protected void doQOut(
+        XYChartGenerator generator,
+        WQKms    wqkms,
+        ArtifactAndFacet aaf,
+        ThemeDocument theme,
+        boolean  visible,
+        int index
+    ) {
+        logger.debug("QProcessor.doOut");
+
+        XYSeries series = new StyledXYSeries(aaf.getFacetDescription(), theme);
+
+        StyledSeriesBuilder.addStepPointsKmQ(series, wqkms);
+
+        generator.addAxisSeries(series, index, visible);
+
+        invertAxis(generator, wqkms);
+    }
+
+    /**
+     * This method determines - taking JFreeCharts auto x value ordering into
+     * account - if the x axis need to be inverted. Waterlines in these charts
+     * should decrease.
+     *
+     * @param generator the generator to invert the axis or not.
+     * @param wkms The data object that stores the x and y values used for this
+     * chart.
+     */
+    public void invertAxis(XYChartGenerator generator, WKms wkms) {
+        boolean wsUp = wkms.guessWaterIncreasing();
+        boolean kmUp = DataUtil.guessWaterIncreasing(wkms.allKms());
+        int size = wkms.size();
+        boolean inv = ((wsUp && kmUp) || (!wsUp && !kmUp)) && size > 1;
+
+        if (logger.isDebugEnabled()) {
+            logger.debug("(Wkms)Values  : " + size);
+            if (size > 0) {
+                logger.debug("Start km: " + wkms.getKm(0));
+                logger.debug("End   km: " + wkms.getKm(size-1));
+            }
+            logger.debug("wsUp: " + wsUp);
+            logger.debug("kmUp: " + kmUp);
+            if (size == 1) {
+                logger.debug("InvertAxis not inverting because we have just one km");
+        }
+            logger.debug("inv:  " + inv);
+        }
+        generator.setInverted(inv);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :