ref #10271 avoid NPE for media without mediaCreated

diff --git a/cdmlib-io/src/main/java/eu/etaxonomy/cdm/io/coldp/ColDpClassificationExport.java b/cdmlib-io/src/main/java/eu/etaxonomy/cdm/io/coldp/ColDpClassificationExport.java
index cf51f2edba5afdca861bc46f0bf1b5fa1146ebee..2a97b249f9d156fd58c8aa4bbaeeacb61d344025 100644 (file)
--- a/cdmlib-io/src/main/java/eu/etaxonomy/cdm/io/coldp/ColDpClassificationExport.java
+++ b/cdmlib-io/src/main/java/eu/etaxonomy/cdm/io/coldp/ColDpClassificationExport.java
@@ -527,6 +527,9 @@ public class ColDpClassificationExport
     }
 
     private String toIsoDate(TimePeriod mediaCreated) {
+        if (mediaCreated == null) {
+            return null;
+        }
         //TODO 2 date, what if end or freetext exist?
         Partial partial = mediaCreated.getStart();
         if (partial == null || !partial.isSupported(DateTimeFieldType.year())