ref #8805 fix potential NPE

diff --git a/eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/descriptiveDataSet/matrix/supplementalInfo/SupplementalInfoDisplayConverter.java b/eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/descriptiveDataSet/matrix/supplementalInfo/SupplementalInfoDisplayConverter.java
index bfd2847e174984135b54e74d19388875cd4ece3f..d5d9ed78aebc962cd233f8555d9a48c3a2250e9e 100644 (file)
--- a/eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/descriptiveDataSet/matrix/supplementalInfo/SupplementalInfoDisplayConverter.java
+++ b/eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/descriptiveDataSet/matrix/supplementalInfo/SupplementalInfoDisplayConverter.java
@@ -23,16 +23,12 @@ import eu.etaxonomy.cdm.persistence.dto.TaxonNodeDto;
  *
  * @author pplitzner
  * @since Dec 14, 2017
- *
  */
 public class SupplementalInfoDisplayConverter extends DisplayConverter{
 
     public SupplementalInfoDisplayConverter() {
     }
 
-    /**
-     * {@inheritDoc}
-     */
     @Override
     public Object canonicalToDisplayValue(Object canonicalValue) {
         String displayValue = "";
@@ -64,12 +60,9 @@ public class SupplementalInfoDisplayConverter extends DisplayConverter{
         return displayValue;
     }
 
-    /**
-     * {@inheritDoc}
-     */
     @Override
     public Object displayToCanonicalValue(Object displayValue) {
-        return displayValue.toString();
+        return displayValue == null? null : displayValue.toString();
     }
 
 }