private static void validateInput(ColumnType columnType) throws ExecutionException {
        if (columnType == null) {
            String messagge = "The ColumnType can not be null.";
            LOGGER.error(messagge);
            throw new ExecutionException(messagge);
        }
    }
private static void validateInput ( ColumnType columnType ) throws ExecutionException { if ( columnType == null ) { String messagge = "The ColumnType can not be null." ; LOGGER . error ( messagge ) ; throw new ExecutionException ( messagge ) ; } }
This method validate the Input.

@param columnType the columnType.
@throws ExecutionException if a exception happens.