--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/de/mpiwg/web/books/SortBooksByDate.java	Mon Jun 01 14:40:48 2015 +0200
@@ -0,0 +1,25 @@
+package de.mpiwg.web.books;
+
+import java.util.Comparator;
+
+
+import de.mpiwg.gazetteer.db.DBBook;
+
+
+public class SortBooksByDate implements Comparator<DBBook>{
+	
+	public int compare(DBBook o1, DBBook o2) {
+		
+		if(o1.getCurrentSectionVersion() == null && o2.getCurrentSectionVersion() == null) {
+			return o1.getId().compareTo(o2.getId());	
+		} else if (o1.getCurrentSectionVersion() == null) {
+			return -1;
+		} else if (o2.getCurrentSectionVersion() == null){
+			return 1;
+		} else {
+			return o1.getCurrentSectionVersion().getDate().compareTo(o2.getCurrentSectionVersion().getDate());	
+		}
+	
+	}
+
+}