--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/backend/src/main/java/org/dive4elements/river/importer/ImportElevationModel.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,64 @@
+package org.dive4elements.river.importer;
+
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.hibernate.Session;
+import org.hibernate.Query;
+
+import org.dive4elements.river.model.ElevationModel;
+
+
+public class ImportElevationModel {
+
+    private static final Logger log =
+        Logger.getLogger(ImportElevationModel.class);
+
+    protected String name;
+
+    protected ImportUnit unit;
+
+    protected ElevationModel peer;
+
+
+    public ImportElevationModel(String name, ImportUnit unit) {
+        this.name = name;
+        this.unit = unit;
+    }
+
+
+    public void storeDependencies() {
+        ElevationModel model = getPeer();
+    }
+
+    public ElevationModel getPeer() {
+        if (unit == null) {
+            log.warn("No elevation model specified.");
+            return null;
+        }
+
+        if (peer == null) {
+            Session session = ImporterSession.getInstance().getDatabaseSession();
+            Query query = session.createQuery(
+                "from ElevationModel where " +
+                "name=:name and unit=:unit");
+            query.setParameter("name", name);
+            query.setParameter("unit", unit.getPeer());
+            List<ElevationModel> models = query.list();
+
+            if (models.isEmpty()) {
+                log.info("Create new ElevationModel DB instance.");
+
+                peer = new ElevationModel(name, unit.getPeer());
+                session.save(peer);
+            }
+            else {
+                peer = models.get(0);
+            }
+        }
+
+        return peer;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :