if ( NONE.equals( currentDataSetName )
if ( currentDataSetName == null
	private int canChangeDataSet( String newName )	{		String currentDataSetName = getDataSetName( );		if ( NONE.equals( currentDataSetName )				&& !inputElement.columnBindingsIterator( ).hasNext( ) )		{			return 0;		}		else if ( currentDataSetName.equals( newName ) )		{			return 2;		}		MessageDialog prefDialog = new MessageDialog( UIUtil.getDefaultShell( ),				Messages.getString( "dataBinding.title.changeDataSet" ),//$NON-NLS-1$				null,				Messages.getString( "dataBinding.message.changeDataSet" ),//$NON-NLS-1$				MessageDialog.INFORMATION,				new String[]{						IDialogConstants.YES_LABEL,						IDialogConstants.NO_LABEL,						IDialogConstants.CANCEL_LABEL,				},				0 );		return prefDialog.open( );	}