DO NOT REPLY [Bug 35288] New: - HSSFCell.setCellFormula(..) followed by setCellValue(..) throws ClassCastException

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http://issues.apache.org/bugzilla/show_bug.cgi?id=35288

           Summary: HSSFCell.setCellFormula(..) followed by setCellValue(..)
                    throws ClassCastException
           Product: POI
           Version: 3.0-dev
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: HSSF
        AssignedTo: poi-dev@jakarta.apache.org
        ReportedBy: amolweb@yahoo.com


Following code throws ClassCastException:

1        HSSFWorkbook workbook = new HSSFWorkbook();
2        HSSFSheet sheet = workbook.createSheet();
3        HSSFRow row = sheet.createRow(0);
4        HSSFCell cell = row.createCell((short) 0);
5        cell.setCellFormula("SUM(1,2)");
6        cell.setCellValue("TEST"); // EXCEPTION!!

It does not matter that the call to setCellValue sets String,
double or boolean. ie the following at line 6 above causes
the same error:

6        cell.setCellValue(true);
6        cell.setCellValue(1);

Notes:
In class HSSFCell,
setCellValue(..) methods do not call appropriate 
setCellType(..) if the cell type is CELL_TYPE_FORMULA 
- which is apparently desired behaviour. 
But before casting "instanceof XYZRecord" check is 
not performed which causes casting of FormulaRecordAggregate
to throw that exception.

Workaround:
  Calling setCellType explicitly prior to setCellValue
can prevent the problem... (but it prevents setting
initial values for formula cells, which is what I
was attempting)

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