--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/WstColumnFactory.java	Wed Mar 28 17:03:11 2018 +0200
@@ -0,0 +1,41 @@
+/** 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;
+
+import java.util.List;
+
+import org.dive4elements.river.backend.SessionHolder;
+import org.dive4elements.river.model.Wst;
+import org.dive4elements.river.model.WstColumn;
+import org.hibernate.Query;
+import org.hibernate.Session;
+
+/**
+ * @author Gernot Belger
+ */
+public final class WstColumnFactory {
+    private WstColumnFactory() {
+        throw new UnsupportedOperationException("helper class");
+    }
+
+    public static WstColumn getWstColumn(final int wst_id, final int columnPosition) {
+        final Session session = SessionHolder.HOLDER.get();
+
+        final Wst wst = WstFactory.getWst(wst_id);
+
+        final Query query = session.createQuery("from WstColumn where wst=:wst_id and position = :position");
+        query.setParameter("wst_id", wst);
+        query.setInteger("position", columnPosition);
+
+        final List<WstColumn> columns = query.list();
+
+        return columns.isEmpty() ? null : columns.get(0);
+    }
+}
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