--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-backend/src/main/java/de/intevation/flys/importer/ImportWaterlevelDifferenceValue.java	Thu Apr 26 09:46:32 2012 +0000
@@ -0,0 +1,65 @@
+package de.intevation.flys.importer;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.log4j.Logger;
+
+import org.hibernate.Session;
+import org.hibernate.Query;
+
+import de.intevation.flys.model.WaterlevelDifferenceColumn;
+import de.intevation.flys.model.WaterlevelDifferenceValue;
+
+
+public class ImportWaterlevelDifferenceValue {
+
+    private static final Logger log =
+        Logger.getLogger(ImportWaterlevelDifferenceValue.class);
+
+
+    private Double station;
+    private Double value;
+
+    private WaterlevelDifferenceValue peer;
+
+
+    public ImportWaterlevelDifferenceValue(Double station, Double value) {
+        this.station = station;
+        this.value   = value;
+    }
+
+
+    public void storeDependencies(WaterlevelDifferenceColumn column) {
+        getPeer(column);
+    }
+
+
+    public WaterlevelDifferenceValue getPeer(WaterlevelDifferenceColumn column) {
+        if (peer == null) {
+            Session session = ImporterSession.getInstance().getDatabaseSession();
+            Query query = session.createQuery(
+                "from WaterlevelDifferenceValue where " +
+                "   column=:column and " +
+                "   station=:station and " +
+                "   value=:value"
+            );
+
+            query.setParameter("column", column);
+            query.setParameter("station", station);
+            query.setParameter("value", value);
+
+            List<WaterlevelDifferenceValue> values = query.list();
+            if (values.isEmpty()) {
+                peer = new WaterlevelDifferenceValue(column, station, value);
+                session.save(peer);
+            }
+            else {
+                peer = values.get(0);
+            }
+        }
+
+        return peer;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :