--- a/flys-artifacts/ChangeLog	Wed Dec 21 15:44:41 2011 +0000
+++ b/flys-artifacts/ChangeLog	Thu Dec 22 12:50:52 2011 +0000
@@ -1,3 +1,9 @@
+2011-12-22	Felix Wolfsteller	<felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/model/CrossSectionFactory.java
+	  (isNewest): New, query whether a CrossSection is the newest for its
+		      river, doc.
+
 2011-12-21  Ingo Weinzierl <ingo@intevation.de>
 
 	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java: Added a

--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/CrossSectionFactory.java	Wed Dec 21 15:44:41 2011 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/CrossSectionFactory.java	Thu Dec 22 12:50:52 2011 +0000
@@ -51,7 +51,28 @@
     }
 
 
-    /** Get a specific CrossSection from db. */
+    /**
+     * True if the given section is the "newest" for that river.
+     * @param section Given section
+     * @return true if the section has the most advanced end of its validity interval
+     *         or the most advanced start of its validity interval.
+     */
+    public static boolean isNewest(CrossSection section) {
+        Session session = SessionHolder.HOLDER.get();
+        Query query = session.createQuery(
+            "from CrossSection where river.id = :riverid "
+            + " order by timeInterval.stopTime desc, timeInterval.startTime desc");
+        query.setParameter("riverid", section.getRiver().getId());
+
+        CrossSection cs = (CrossSection) query.list().get(0);
+        return section.getId().equals(cs.getId());
+    }
+
+
+    /**
+     *  Get a specific CrossSection from db.
+     *  @param id The dbid of the cross-section to load.
+     */
     public static CrossSection getCrossSection(int id) {
         Cache cache = CacheFactory.getCache(CACHE_NAME);
         if (cache != null) {