empire-db/src/main/java/org/apache/empire/data/list/DataListHead.java [108:140]:
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        Options options = column.getOptions();
        if (options!=null && options.has(value))
        {   // lookup option
            text = options.get(value);
        }
        else if (value instanceof String)
        {   // we already have a string
            text = (String)value;
        }
        else if (ObjectUtils.isEmpty(value))
        {   // empty
            value = column.getAttribute(Column.COLATTR_NULLTEXT);
            text = (value!=null ? value.toString() : StringUtils.EMPTY);
        }
        else
        {   // format value
            text = formatValue(column, value);
            if (text== null)
                text = StringUtils.EMPTY; 
        }
        // Done
        return text;
    }

    /**
     * Convert a non-string value to a string
     * @param column the column expression 
     * @param value the value to format
     * @return the formatted string
     */
    protected String formatValue(ColumnExpr column, Object value)
    {
        return ObjectUtils.getString(value);
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empire-db/src/main/java/org/apache/empire/db/DBRecordData.java [468:500]:
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        Options options = column.getOptions();
        if (options!=null && options.has(value))
        {   // lookup option
            text = options.get(value);
        }
        else if (value instanceof String)
        {   // we already have a string
            text = (String)value;
        }
        else if (ObjectUtils.isEmpty(value))
        {   // empty
            value = column.getAttribute(Column.COLATTR_NULLTEXT);
            text = (value!=null ? value.toString() : StringUtils.EMPTY);
        }
        else
        {   // format value
            text = formatValue(column, value);
            if (text== null)
                text = StringUtils.EMPTY; 
        }
        // done
        return text;
    }

    /**
     * Convert a non-string value to a string
     * @param column the column expression 
     * @param value the value to format
     * @return the formatted string
     */
    protected String formatValue(ColumnExpr column, Object value)
    {
        return ObjectUtils.getString(value);
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