--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/minfo/BedDiffBaseGenerator.java	Wed Jul 10 10:05:52 2013 +0200
@@ -0,0 +1,58 @@
+/* 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.minfo;
+
+import org.apache.log4j.Logger;
+
+import org.dive4elements.artifactdatabase.state.ArtifactAndFacet;
+import org.dive4elements.river.artifacts.model.minfo.BedDifferencesResult;
+import org.dive4elements.river.jfree.Bounds;
+import org.dive4elements.river.jfree.DoubleBounds;
+import org.dive4elements.river.exports.fixings.FixChartGenerator;
+
+/** Base for BedDiff*Year*Generators, to avoid duplicate code of setContextBounds. */
+public abstract class BedDiffBaseGenerator
+extends FixChartGenerator
+{
+    /** The logger that is used in this generator. */
+    private static Logger logger = Logger.getLogger(BedDiffBaseGenerator.class);
+
+    /** Set context values for something. */
+    public void setContextBounds(ArtifactAndFacet bundle) {
+        Bounds xBounds = getXBounds(0);
+        if (xBounds != null && getDomainAxisRange() != null) {
+            Bounds bounds =
+                calculateZoom(xBounds, getDomainAxisRange());
+            context.putContextValue("startkm", bounds.getLower());
+            context.putContextValue("endkm", bounds.getUpper());
+        }
+        else if (xBounds != null && getDomainAxisRange() == null) {
+            context.putContextValue("startkm", xBounds.getLower());
+            context.putContextValue("endkm", xBounds.getUpper());
+        }
+        else if (xBounds == null && getDomainAxisRange() == null) {
+            BedDifferencesResult data = (BedDifferencesResult)bundle.getData(context);
+            if (data.getKms().size() > 0) {
+                context.putContextValue("startkm", data.getKms().min());
+                context.putContextValue("endkm", data.getKms().max());
+            }
+            else {
+                logger.warn("No data to define start and end km");
+            }
+        }
+        else if (xBounds == null && getDomainAxisRange() != null){
+            BedDifferencesResult data = (BedDifferencesResult)bundle.getData(context);
+            Bounds b = new DoubleBounds(data.getKms().min(), data.getKms().max());
+            Bounds bounds =
+                calculateZoom(b, getDomainAxisRange());
+            context.putContextValue("startkm", bounds.getLower());
+            context.putContextValue("endkm", bounds.getUpper());
+        }
+    }
+}