[388928] Develop a resource transfer framework

https://bugs.eclipse.org/bugs/show_bug.cgi?id=388928

1 files changed, 25 insertions, 1 deletions

diff --git a/plugins/org.eclipse.net4j.util.ui/src/org/eclipse/net4j/util/ui/dnd/DNDDropAdapter.java b/plugins/org.eclipse.net4j.util.ui/src/org/eclipse/net4j/util/ui/dnd/DNDDropAdapter.java
index f2c7ec452a..6eacac7d47 100644
--- a/plugins/org.eclipse.net4j.util.ui/src/org/eclipse/net4j/util/ui/dnd/DNDDropAdapter.java
+++ b/plugins/org.eclipse.net4j.util.ui/src/org/eclipse/net4j/util/ui/dnd/DNDDropAdapter.java
@@ -38,6 +38,14 @@ public abstract class DNDDropAdapter<TYPE> extends ViewerDropAdapter
   }
 
   /**
+   * @since 3.3
+   */
+  protected DNDDropAdapter(StructuredViewer viewer)
+  {
+    super(viewer);
+  }
+
+  /**
    * @since 3.0
    */
   public Transfer[] getTransfers()
@@ -45,6 +53,14 @@ public abstract class DNDDropAdapter<TYPE> extends ViewerDropAdapter
     return transfers;
   }
 
+  /**
+   * @since 3.3
+   */
+  protected void setTransfers(Transfer[] transfers)
+  {
+    this.transfers = transfers;
+  }
+
   @Override
   public StructuredViewer getViewer()
   {
@@ -97,7 +113,15 @@ public abstract class DNDDropAdapter<TYPE> extends ViewerDropAdapter
       return false;
     }
 
-    for (Transfer transfer : transfers)
+    return validateTransfer(type);
+  }
+
+  /**
+   * @since 3.3
+   */
+  protected boolean validateTransfer(TransferData type)
+  {
+    for (Transfer transfer : getTransfers())
     {
       if (transfer.isSupportedType(type))
       {