Interface ISelectionValidator

    • Method Detail

      • isValid

        String isValid​(Object selection)
        Returns a string indicating whether the given selection is valid. If the result is null, the selection is considered to be valid; if the result is non-empty, it contains the error message to be displayed to the user.
        Parameters:
        selection - the selection to be validated
        Returns:
        the error message, or null indicating that the value is valid