Bug 126658 [CommonNavigator] [DND] Complete definition of DND API
bundles/org.eclipse.ui.navigator.resources/src/org/eclipse/ui/internal/navigator/resources/workbench/ResourceDropAction.java
message = operation.validateDestination(destination, selectedResources);
			}
		} 
		else if (FileTransfer.getInstance().isSupportedType(transferType)) {
			String[] sourceNames = (String[]) FileTransfer.getInstance().nativeToJava(transferType);
			if (sourceNames == null) {
				
				
				
				sourceNames = new String[0];
			}
			message = getCopyOperation().validateImportDestination(destination, sourceNames);
		}
		if (message != null) {
			return error(message);
		}
		return ok();
	}
	/**
	 * @return
	 */
	private CopyFilesAndFoldersOperation getMoveOperation() {
		if (moveOperation == null)
			moveOperation = new MoveFilesAndFoldersOperation(getShell());
		return moveOperation;
	}
	/**
	 * @return
	 */
	private CopyFilesAndFoldersOperation getCopyOperation() {