Merge pull request #6523 from effective-webwork/calendar-npe-fix

Prevent NPE in calendar when selecting same granularity twice

Author: solth

Kitodo/src/main/java/org/kitodo/production/forms/CalendarForm.java

@@ -223,10 +223,12 @@ public Granularity getGranularity() {
      * @param granularity as org.kitodo.production.model.bibliography.course.Granularity
      */
     public void setGranularity(Granularity granularity) {
-        this.granularity = granularity;
-        course.splitInto(granularity);
-        if (Objects.nonNull(PrimeFaces.current()) && Objects.nonNull(FacesContext.getCurrentInstance())) {
-            PrimeFaces.current().ajax().update("createProcessesConfirmDialog");
+        if (Objects.nonNull(granularity)) {
+            this.granularity = granularity;
+            course.splitInto(granularity);
+            if (Objects.nonNull(PrimeFaces.current()) && Objects.nonNull(FacesContext.getCurrentInstance())) {
+                PrimeFaces.current().ajax().update("createProcessesConfirmDialog");
+            }
         }
     }