Examples of org.apache.poi.ss.usermodel.DataFormatter

org.apache.poi.ss.usermodel.DataFormatter
DataFormatter contains methods for formatting the value stored in an Cell. This can be useful for reports and GUI presentations when you need to display data exactly as it appears in Excel. Supported formats include currency, SSN, percentages, decimals, dates, phone numbers, zip codes, etc.
Internally, formats will be implemented using subclasses of {@link Format}such as {@link DecimalFormat} and {@link SimpleDateFormat}. Therefore the formats used by this class must obey the same pattern rules as these Format subclasses. This means that only legal number pattern characters ("0", "#", ".", "," etc.) may appear in number formats. Other characters can be inserted before or after the number pattern to form a prefix or suffix.

For example the Excel pattern "$#,##0.00 "USD"_);($#,##0.00 "USD")" will be correctly formatted as "$1,000.00 USD" or "($1,000.00 USD)". However the pattern "00-00-00" is incorrectly formatted by DecimalFormat as "000000--". For Excel formats that are not compatible with DecimalFormat, you can provide your own custom {@link Format} implementationvia DataFormatter.addFormat(String,Format). The following custom formats are already provided by this class:
```
 SSN "000-00-0000"
 Phone Number "(###) ###-####"
 Zip plus 4 "00000-0000"
 
 
```
If the Excel format pattern cannot be parsed successfully, then a default format will be used. The default number format will mimic the Excel General format: "#" for whole numbers and "#.##########" for decimal numbers. You can override the default format pattern with DataFormatter.setDefaultNumberFormat(Format). Note: the default format will only be used when a Format cannot be created from the cell's data format string.
Note that by default formatted numeric values are trimmed. Excel formats can contain spacers and padding and the default behavior is to strip them off.

Example:

Consider a numeric cell with a value 12.343 and format "##.##_ ". The trailing underscore and space ("_ ") in the format adds a space to the end and Excel formats this cell as "12.34 ", but DataFormatter trims the formatted value and returns "12.34".
You can enable spaces by passing the emulateCsv=true flag in the DateFormatter cosntructor. If set to true, then the output tries to conform to what you get when you take an xls or xlsx in Excel and Save As CSV file:
- returned values are not trimmed
- Invalid dates are formatted as 255 pound signs ("#")
- simulate Excel's handling of a format string of all # when the value is 0. Excel will output "", DataFormatter will output "0".
@author James May (james dot may at fmr dot com) @author Robert Kish

     */
    public void test47490() throws Exception {
       XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook("GeneralFormatTests.xlsx");
       Sheet s = wb.getSheetAt(1);
       Row r;
       DataFormatter df = new DataFormatter();
       
       r = s.getRow(1);
       assertEquals(1.0, r.getCell(2).getNumericCellValue());
       assertEquals("General", r.getCell(2).getCellStyle().getDataFormatString());
       assertEquals("1", df.formatCellValue(r.getCell(2)));
       assertEquals("1", df.formatRawCellContents(1.0, -1, "@"));
       assertEquals("1", df.formatRawCellContents(1.0, -1, "General"));
              
       r = s.getRow(2);
       assertEquals(12.0, r.getCell(2).getNumericCellValue());
       assertEquals("General", r.getCell(2).getCellStyle().getDataFormatString());
       assertEquals("12", df.formatCellValue(r.getCell(2)));
       assertEquals("12", df.formatRawCellContents(12.0, -1, "@"));
       assertEquals("12", df.formatRawCellContents(12.0, -1, "General"));
       
       r = s.getRow(3);
       assertEquals(123.0, r.getCell(2).getNumericCellValue());
       assertEquals("General", r.getCell(2).getCellStyle().getDataFormatString());
       assertEquals("123", df.formatCellValue(r.getCell(2)));
       assertEquals("123", df.formatRawCellContents(123.0, -1, "@"));
       assertEquals("123", df.formatRawCellContents(123.0, -1, "General"));
    }

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            this.sharedStringsTable = strings;
            this.minColumnCount = cols;
            this.output = target;
            this.value = new StringBuffer();
            this.nextDataType = xssfDataType.NUMBER;
            this.formatter = new DataFormatter();
        }

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            XSSFRichTextString rtss = new XSSFRichTextString(_sharedStringTable.getEntryAt(idx));
            return rtss.toString();
        case NUMBER:
            final String numberString = _value.toString();
            if (_formatString != null) {
                DataFormatter formatter = getDataFormatter();
                if (HSSFDateUtil.isADateFormat(_formatIndex, _formatString)) {
                    Date date = DateUtil.getJavaDate(Double.parseDouble(numberString));
                    return DateUtils.createDateFormat().format(date);
                }
                return formatter.formatRawCellContents(Double.parseDouble(numberString), _formatIndex, _formatString);
            } else {
                if (numberString.endsWith(".0")) {
                    // xlsx only stores doubles, so integers get ".0" appended
                    // to them
                    return numberString.substring(0, numberString.length() - 2);

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            return "";
        }
    }


    private DataFormatter getDataFormatter() {
        return new DataFormatter();
    }

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        this.extractor = extractor;
        extractor.setFormulasNotResults(false);
        extractor.setLocale(locale);
        
        if(locale == null) {
           formatter = new DataFormatter();
        } else  {
           formatter = new DataFormatter(locale);
        }
    }

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    private void processSheet( Sheet sheet,
                               List<? extends DataListener> listeners ) {
        int maxRows = sheet.getLastRowNum();


        CellRangeAddress[] mergedRanges = getMergedCells( sheet );
        DataFormatter formatter = new DataFormatter( Locale.ENGLISH );
        FormulaEvaluator formulaEvaluator = sheet.getWorkbook().getCreationHelper().createFormulaEvaluator();


        for ( int i = 0; i <= maxRows; i++ ) {
            Row row = sheet.getRow( i );
            int lastCellNum = row != null ? row.getLastCellNum() : 0;
            newRow( listeners, i, lastCellNum );


            for ( int cellNum = 0; cellNum < lastCellNum; cellNum++ ) {
                Cell cell = row.getCell( cellNum );
                if ( cell == null ) {
                    continue;
                }
                double num = 0;


                CellRangeAddress merged = getRangeIfMerged( cell,
                                                            mergedRanges );


                int mergedColStart = DataListener.NON_MERGED;
                if ( merged != null ) {
                    cell = sheet.getRow(merged.getFirstRow()).getCell(merged.getFirstColumn());
                    mergedColStart = cell.getColumnIndex();
                }


                switch ( cell.getCellType() ) {
                    case Cell.CELL_TYPE_FORMULA:
                        String cellValue = null;
                        try {
                            newCell(listeners,
                                    i,
                                    cellNum,
                                    formatter.formatCellValue(cell, formulaEvaluator),
                                    mergedColStart);
                        } catch (RuntimeException e) {
                            // This is thrown if an external link cannot be resolved, so try the cached value
                            log.warn("Cannot resolve externally linked value: " + formatter.formatCellValue(cell));
                            String cachedValue = tryToReadCachedValue(cell);
                            newCell(listeners,
                                    i,
                                    cellNum,
                                    cachedValue,
                                    mergedColStart);
                        }
                        break;
                    case Cell.CELL_TYPE_NUMERIC:
                        num = cell.getNumericCellValue();
                    default:
                        if (num - Math.round(num) != 0) {
                            newCell(listeners,
                                    i,
                                    cellNum,
                                    String.valueOf(num),
                                    mergedColStart);
                        } else {
                            newCell(listeners,
                                    i,
                                    cellNum,
                                    formatter.formatCellValue(cell),
                                    mergedColStart);
                        }
                }
            }
        }

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        }
        finishSheet( listeners );
    }


    private String tryToReadCachedValue( Cell cell ) {
        DataFormatter formatter = new DataFormatter( Locale.ENGLISH );
        String cachedValue;
        switch ( cell.getCachedFormulaResultType() ) {
            case Cell.CELL_TYPE_NUMERIC:
                double num = cell.getNumericCellValue();
                if ( num - Math.round( num ) != 0 ) {
                    cachedValue = String.valueOf( num );
                } else {
                    cachedValue = formatter.formatCellValue( cell );
                }
                break;


            case Cell.CELL_TYPE_STRING:
                cachedValue = cell.getStringCellValue();

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  protected String getCellStringContentsForType(int type, Cell in) {
    if (type == CELL_TYPE_FORMULA) {
      in.setCellType(in.getCachedFormulaResultType());
    }


    DataFormatter df = new DataFormatter(Locale.getDefault());
    return df.formatCellValue(in);


  }

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    public static double getColumnWidth(Sheet sheet, int column, boolean useMergedCells){
        AttributedString str;
        TextLayout layout;


        Workbook wb = sheet.getWorkbook();
        DataFormatter formatter = new DataFormatter();
        Font defaultFont = wb.getFontAt((short) 0);


        str = new AttributedString(String.valueOf(defaultChar));
        copyAttributes(defaultFont, str, 0, 1);
        layout = new TextLayout(str.getIterator(), fontRenderContext);

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    public static double getColumnWidth(Sheet sheet, int column, boolean useMergedCells, int firstRow, int lastRow){
        AttributedString str;
        TextLayout layout;


        Workbook wb = sheet.getWorkbook();
        DataFormatter formatter = new DataFormatter();
        Font defaultFont = wb.getFontAt((short) 0);


        str = new AttributedString(String.valueOf(defaultChar));
        copyAttributes(defaultFont, str, 0, 1);
        layout = new TextLayout(str.getIterator(), fontRenderContext);

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