--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-backend/src/main/java/org/dive4elements/river/importer/ImportTimeInterval.java	Thu Apr 25 11:53:11 2013 +0200
@@ -0,0 +1,98 @@
+package de.intevation.flys.importer;
+
+import de.intevation.flys.model.TimeInterval;
+
+import org.hibernate.Session;
+import org.hibernate.Query;
+
+import java.util.List;
+import java.util.Date;
+
+import org.apache.log4j.Logger;
+
+public class ImportTimeInterval
+{
+    private static Logger log = Logger.getLogger(ImportTimeInterval.class);
+
+    protected Date startTime;
+    protected Date stopTime;
+
+    protected TimeInterval peer;
+
+    public ImportTimeInterval() {
+    }
+
+    public ImportTimeInterval(Date startTime) {
+        this.startTime = startTime;
+        this.stopTime = null;
+    }
+
+    public ImportTimeInterval(Date startTime, Date stopTime) {
+	Date start;
+	Date stop;
+	if (startTime == null) {
+	    start = stopTime;
+	    stop = null;
+	}
+	else {
+	    start = startTime;
+	    stop = stopTime;
+	}
+
+        if (stop != null && start.after(stop)) {
+            this.stopTime = start;
+            this.startTime = stop;
+        }
+        else {
+            this.startTime = start;
+            this.stopTime  = stop;
+        }
+    }
+
+    public Date getStartTime() {
+        return startTime;
+    }
+
+    public void setStartTime(Date startTime) {
+        this.startTime = startTime;
+    }
+
+    public Date getStopTime() {
+        return stopTime;
+    }
+
+    public void setStopTime(Date stopTime) {
+        this.stopTime = stopTime;
+    }
+
+    public TimeInterval getPeer() {
+        if (peer == null) {
+            Session session = ImporterSession.getInstance().getDatabaseSession();
+            if (startTime == null) {
+                log.error("Null Start time will be ignored.");
+            }
+            Query query;
+            if (stopTime == null) {
+                query = session.createQuery(
+                    "from TimeInterval where startTime=:a and stopTime is null");
+            }
+            else {
+                query = session.createQuery(
+                    "from TimeInterval where startTime=:a and stopTime=:b");
+                query.setParameter("b", stopTime);
+            }
+            query.setParameter("a", startTime);
+
+            List<TimeInterval> intervals = query.list();
+            if (intervals.isEmpty()) {
+                peer = new TimeInterval(startTime, stopTime);
+                session.save(peer);
+            }
+            else {
+                peer = intervals.get(0);
+            }
+        }
+        return peer;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :