[500681] Fix potential NPEs in the automated migration

Bug: 500681
Change-Id: Idabed045b2b02f7a372da06d6a67587261c00dc4
Signed-off-by: Pierre-Charles David <pierre-charles.david@obeo.fr>

1 files changed, 6 insertions, 2 deletions

diff --git a/plugins/org.eclipse.sirius.ui.properties/src/org/eclipse/sirius/ui/properties/internal/migration/ReferenceWidgetMigrationParticipant.java b/plugins/org.eclipse.sirius.ui.properties/src/org/eclipse/sirius/ui/properties/internal/migration/ReferenceWidgetMigrationParticipant.java
index 998381657f..9535c7be0d 100644
--- a/plugins/org.eclipse.sirius.ui.properties/src/org/eclipse/sirius/ui/properties/internal/migration/ReferenceWidgetMigrationParticipant.java
+++ b/plugins/org.eclipse.sirius.ui.properties/src/org/eclipse/sirius/ui/properties/internal/migration/ReferenceWidgetMigrationParticipant.java
@@ -213,13 +213,17 @@ public class ReferenceWidgetMigrationParticipant extends AbstractVSMMigrationPar
         hyperlink.setInitialOperation(listDescription.getOnClickOperation());
 
         ListWidgetStyle listWidgetStyle = listDescription.getStyle();
-        hyperlink.setStyle(this.handleHyperlinkStyle(listWidgetStyle));
+        if (listWidgetStyle != null) {
+            hyperlink.setStyle(this.handleHyperlinkStyle(listWidgetStyle));
+        }
 
         List<ListWidgetConditionalStyle> listConditionalStyles = listDescription.getConditionalStyles();
         for (ListWidgetConditionalStyle listWidgetConditionalStyle : listConditionalStyles) {
             HyperlinkWidgetConditionalStyle hyperlinkWidgetConditionalStyle = PropertiesFactory.eINSTANCE.createHyperlinkWidgetConditionalStyle();
             hyperlinkWidgetConditionalStyle.setPreconditionExpression(listWidgetConditionalStyle.getPreconditionExpression());
-            hyperlinkWidgetConditionalStyle.setStyle(this.handleHyperlinkStyle(listWidgetConditionalStyle.getStyle()));
+            if (listWidgetConditionalStyle.getStyle() != null) {
+                hyperlinkWidgetConditionalStyle.setStyle(this.handleHyperlinkStyle(listWidgetConditionalStyle.getStyle()));
+            }
             hyperlink.getConditionalStyles().add(hyperlinkWidgetConditionalStyle);
         }
         return hyperlink;