X-Git-Url: https://dev.e-taxonomy.eu/gitweb/taxeditor.git/blobdiff_plain/aca6923265b802bbbea40b95b45927508c616e2b..43fdbc98815ef71a54c68fe96a11ea189355accc:/eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/featuretree/e4/FeatureNodeDragListener.java

diff --git a/eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/featuretree/e4/FeatureNodeDragListener.java b/eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/featuretree/e4/FeatureNodeDragListener.java
index e479ae99f..edcdba0dc 100644
--- a/eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/featuretree/e4/FeatureNodeDragListener.java
+++ b/eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/featuretree/e4/FeatureNodeDragListener.java
@@ -13,7 +13,7 @@ import org.eclipse.jface.viewers.TreeViewer;
 import org.eclipse.swt.dnd.DragSourceAdapter;
 import org.eclipse.swt.dnd.DragSourceEvent;
 
-import eu.etaxonomy.cdm.model.description.FeatureNode;
+import eu.etaxonomy.cdm.model.term.TermNode;
 import eu.etaxonomy.taxeditor.featuretree.FeatureNodeTransfer;
 
 public class FeatureNodeDragListener extends DragSourceAdapter {
@@ -30,9 +30,11 @@ public class FeatureNodeDragListener extends DragSourceAdapter {
     @Override
     public void dragSetData(DragSourceEvent event) {
         IStructuredSelection selection = (IStructuredSelection) viewer.getSelection();
-        FeatureNode[] featureNodes = (FeatureNode[]) selection.toList().toArray(new FeatureNode[selection.size()]);
-        if (FeatureNodeTransfer.getInstance().isSupportedType(event.dataType)) {
-            event.data = featureNodes;
+        if(selection!=null && !selection.isEmpty()){
+            TermNode[] featureNodes = (TermNode[]) selection.toList().toArray(new TermNode[selection.size()]);
+            if (FeatureNodeTransfer.getInstance().isSupportedType(event.dataType)) {
+                event.data = featureNodes;
+            }
         }
     }
 
@@ -41,7 +43,9 @@ public class FeatureNodeDragListener extends DragSourceAdapter {
 	 */
 	@Override
 	public void dragStart(DragSourceEvent event) {
-		event.doit = !viewer.getSelection().isEmpty();
+        event.doit = !viewer.getSelection().isEmpty()
+                && ((IStructuredSelection) viewer.getSelection()).toList()
+                .stream().allMatch(element -> element instanceof TermNode);
 	}
 
 }
\ No newline at end of file