protected NumberFormat getNumberFormat()

in empire-db-jakarta-faces/src/main/java/org/apache/empire/jakarta/controls/TextInputControl.java [592:657]
57 lines of code
18 McCabe index (conditional complexity)

    protected NumberFormat getNumberFormat(DataType dataType, ValueInfo vi, Column column)
    {
        Locale locale = vi.getLocale();
        if (column == null)
            return NumberFormat.getNumberInstance(locale);
        // Column is supplied
        String type = StringUtils.valueOf(column.getAttribute(Column.COLATTR_NUMBER_TYPE));
        boolean isInteger = "Integer".equalsIgnoreCase(type);
        NumberFormat nf = (isInteger) ? NumberFormat.getIntegerInstance(locale)
                                      : NumberFormat.getNumberInstance(locale);
        // Groups Separator?
        Object groupSep = column.getAttribute(Column.COLATTR_NUMBER_GROUPSEP);
        nf.setGroupingUsed(groupSep != null && ObjectUtils.getBoolean(groupSep));
        // Fraction Digits?
        Object limitFractionDigits = (isInteger ? null : getFormatOption(vi, FRACTION_DIGITS, Column.COLATTR_FRACTION_DIGITS));
        if (limitFractionDigits != null)
        {   // get column limits
            int minFactionDigits = 0;
            int maxFactionDigits = -1;
            if (!(limitFractionDigits instanceof Number)) {
                // not a number
                String limit = limitFractionDigits.toString();
                if (limit.startsWith("min:")) {
                    minFactionDigits = ObjectUtils.getInteger(limit.substring(4), 0);
                }
                else if (limit.startsWith("max:")) {
                    maxFactionDigits = ObjectUtils.getInteger(limit.substring(4), -1);
                }
                else if ("auto".equals(limitFractionDigits)) {
                    minFactionDigits = 999; /* make equal to maxFactionDigits */
                }
                else if (!"limit".equals(limitFractionDigits)) {
                    minFactionDigits = maxFactionDigits = ObjectUtils.getInteger(limit, -1);
                }
            }
            else minFactionDigits = maxFactionDigits = ((Number)limitFractionDigits).intValue();
            // check range
            if (minFactionDigits<0)
                minFactionDigits = 0;
            if (maxFactionDigits<0) {
                // Detect from column
                int length = (int)column.getSize();
                maxFactionDigits = (int)(column.getSize()*10)-(length*10);
                if (minFactionDigits > maxFactionDigits)
                    minFactionDigits = maxFactionDigits;
            }
            // Set 
            nf.setMinimumFractionDigits(minFactionDigits);
            nf.setMaximumFractionDigits(maxFactionDigits);
        }
        else if (!isInteger && dataType==DataType.DECIMAL) 
        {   // Detect from column
            int length = (int)column.getSize();
            int maxFactionDigits = (int)(column.getSize()*10)-(length*10);
            nf.setMaximumFractionDigits(maxFactionDigits);
        }
        // IntegerDigits (left-padding)
        Object intDigits = column.getAttribute(Column.COLATTR_INTEGER_DIGITS);
        if (intDigits != null) {
            int integerDigits = ObjectUtils.getInteger(intDigits);
            if (integerDigits>0)
                nf.setMinimumIntegerDigits(integerDigits);
        }
        // Number format
        return nf;
    }