--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/fixings/FixRealizingCalculationExtended.java	Fri Feb 09 18:07:22 2018 +0100
@@ -0,0 +1,45 @@
+/** Copyright (C) 2017 by Bundesanstalt für Gewässerkunde
+ * Software engineering by
+ *  Björnsen Beratende Ingenieure GmbH
+ *  Dr. Schumacher Ingenieurbüro für Wasser und Umwelt
+ *
+ * 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.artifacts.model.fixings;
+
+import java.util.Date;
+import java.util.List;
+
+import org.dive4elements.river.artifacts.access.FixRealizingAccess;
+import org.dive4elements.river.artifacts.model.FixingsOverview;
+import org.dive4elements.river.artifacts.model.FixingsOverviewFactory;
+
+/**
+ * REMARK: this inheritance is only needed, beause changing the orignal calculation will probably break the
+ * serialization of the artifact....
+ *
+ * @author Gernot Belger
+ */
+public class FixRealizingCalculationExtended extends FixRealizingCalculation {
+    private static final long serialVersionUID = 1L;
+
+    public FixRealizingCalculationExtended(final FixRealizingAccess fixAccess) {
+        super(fixAccess);
+    }
+
+    // FIXME: implement
+    // FIXME: check if this breaks serialization
+    public int determineMeanYear() {
+        final FixingsOverview overview = FixingsOverviewFactory.getOverview(this.river);
+        final ColumnCache cc = new ColumnCache();
+
+        final List<Column> columns = getEventColumns(overview, cc);
+        for (final Column column : columns) {
+            final Date date = column.getDate();
+        }
+
+        return 1999;
+    }
+}