Bug 296691 Change new Groups API to Virtual Resource API
If we decide that 'virtual' is the right naming for new resources concept, I will make the following changes. Add IResource#VIRTUAL flag to use in #create methods Add IResource#isVirtual indicating that a resource is virtual Remove IResource#isGroup Remove IFolder#createGroup
bundles/org.eclipse.ui.navigator.resources/src/org/eclipse/ui/navigator/resources/ResourceDropAdapterAssistant.java
CopyFilesAndFoldersOperation copyOperation = new CopyFilesAndFoldersOperation(
					getShell());
			message = copyOperation.validateImportDestination(destination,
					sourceNames);
		}
		if (message != null) {
			return WorkbenchNavigatorPlugin.createErrorStatus(0, message, null);
		}
		return Status.OK_STATUS;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.navigator.CommonDropAdapterAssistant#handleDrop(CommonDropAdapter,
	 *      DropTargetEvent, Object)
	 */
	public IStatus handleDrop(CommonDropAdapter aDropAdapter,
			DropTargetEvent aDropTargetEvent, Object aTarget) {
		if (Policy.DEBUG_DND) {
			System.out
					.println("ResourceDropAdapterAssistant.handleDrop (begin)"); 
		}
		
		if (aDropAdapter.getCurrentTarget() == null
				|| aDropTargetEvent.data == null) {
			return Status.CANCEL_STATUS;
		}
		IStatus status = null;
		IResource[] resources = null;
		TransferData currentTransfer = aDropAdapter.getCurrentTransfer();