[464269] Avoid NPE in SelectDRepresentationElementsistener init

In some cases like GotoMarker, an editor might be opened with a null
representation.

Bug: 464269
Change-Id: Ia7c022b336eb9c79acbb213cf16d53b3d065b196
Signed-off-by: Maxime Porhel <maxime.porhel@obeo.fr>

1 files changed, 6 insertions, 3 deletions

diff --git a/plugins/org.eclipse.sirius.ui/src/org/eclipse/sirius/ui/tools/internal/editor/SelectDRepresentationElementsListener.java b/plugins/org.eclipse.sirius.ui/src/org/eclipse/sirius/ui/tools/internal/editor/SelectDRepresentationElementsListener.java
index 459c4fb1e7..c4575d1a69 100644
--- a/plugins/org.eclipse.sirius.ui/src/org/eclipse/sirius/ui/tools/internal/editor/SelectDRepresentationElementsListener.java
+++ b/plugins/org.eclipse.sirius.ui/src/org/eclipse/sirius/ui/tools/internal/editor/SelectDRepresentationElementsListener.java
@@ -106,9 +106,12 @@ public class SelectDRepresentationElementsListener extends ResourceSetListenerIm
     private void init(DialectEditor editor, boolean defaultSelection) {
         dialectEditor = Preconditions.checkNotNull(editor);
         this.activateDefaultSelection = defaultSelection;
-        TransactionalEditingDomain domain = TransactionUtil.getEditingDomain(editor.getRepresentation());
-        if (domain != null) {
-            domain.addResourceSetListener(this);
+        DRepresentation representation = editor.getRepresentation();
+        if (representation != null) {
+            TransactionalEditingDomain domain = TransactionUtil.getEditingDomain(representation);
+            if (domain != null) {
+                domain.addResourceSetListener(this);
+            }
         }
     }