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Posted to dev@poi.apache.org by bu...@apache.org on 2016/01/12 09:22:16 UTC

[Bug 58838] New: Some cells are null when they aren't

https://bz.apache.org/bugzilla/show_bug.cgi?id=58838

            Bug ID: 58838
           Summary: Some cells are null when they aren't
           Product: POI
           Version: 3.13-FINAL
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P2
         Component: HSSF
          Assignee: dev@poi.apache.org
          Reporter: michele.bissoli.83@gmail.com

Created attachment 33425
  --> https://bz.apache.org/bugzilla/attachment.cgi?id=33425&action=edit
testFile.xls

Hi all,
when I try to read some values into the xls (as attach) I obtain that a lot of
cells result as null when they aren't.

Example code: print all the cells in the first row that contain a value (not
null)

HSSFWorkbook workbook = new HSSFWorkbook(new
FileInputStream(pathToTestFileXls));
HSSFSheet sheet = workbook.getSheet("InitCharge");
int lastCol = CellReference.convertColStringToIndex("BC");
for (int c=0; c <= lastCol; c++) {
    HSSFCell cell = sheet.getRow(1).getCell(c);
    if (cell != null)
        System.out.print(new CellReference(1, c).formatAsString() + ", ");
}

Result:
A2, B2, AA2, AD2,

This is very strange! Only few cells doesn't contain a value!
Even stranger: open the xls with Excel, do NOTHING, click save, re-execute the
same code, result:
A2, B2, Z2, AA2, AB2, AD2, AE2, AG2, AH2, AI2, AJ2, AK2, AL2, AM2, AN2, AO2,
AP2, AQ2, AR2, AS2, AT2, AU2, AV2, AW2, AX2, AY2, AZ2, BA2, BB2, BC2, 

The xls used as input was generated previously with POI.

Thanks,
Michele

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[Bug 58838] Some cells are null when they aren't

Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58838

--- Comment #2 from Javen O'Neal <on...@apache.org> ---
Could you also try this with explicitly setting the CellCreationPolicy[1] to
RETURN_NULL_AND_BLANK or RETURN_BLANK_AS_NULL before calling getCell?

[1]
https://poi.apache.org/apidocs/org/apache/poi/ss/usermodel/class-use/Row.MissingCellPolicy.html

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[Bug 58838] Some cells are null when they aren't

Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58838

Michele <mi...@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #3 from Michele <mi...@gmail.com> ---
Setting RETURN_NULL_AND_BLANK or RETURN_BLANK_AS_NULL has no effects.

The code "that creates the strange Excel sheet" is quite complex, I add it as
attachment (BLSintesi_VerReport.java).

One of the cell that I need to read is writed in xls in
BLSintesi_VerReport.java:174

I add as attachment also other two classes used to write the xls file
(XlsUtil.java, BLSummaryReportXlsStyles.java).

Thanks

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[Bug 58838] Some cells are null when they aren't

Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58838

Dominik Stadler <do...@gmx.at> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #1 from Dominik Stadler <do...@gmx.at> ---
Can you also share the code that creates the strange Excel sheet?

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[Bug 58838] Some cells are null when they aren't

Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58838

--- Comment #6 from Michele <mi...@gmail.com> ---
Created attachment 33432
  --> https://bz.apache.org/bugzilla/attachment.cgi?id=33432&action=edit
XlsUtil.java

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[Bug 58838] Some cells are null when they aren't

Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58838

Dominik Stadler <do...@gmx.at> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #8 from Dominik Stadler <do...@gmx.at> ---
Hmm, not easy to reproduce with all the SQL statements and other stuff, any
chance of a more reduced test-case which can be run without any of your
infrastructure?

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[Bug 58838] Some cells are null when they aren't

Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58838

--- Comment #7 from Michele <mi...@gmail.com> ---
(In reply to Michele from comment #3)

> I add as attachment also other two classes used to write the xls file
> (XlsUtil.java, BLSummaryReportXlsStyles.java).

Sorry, the correct file is BLSintesi_XlsStyles.java and not
BLSummaryReportXlsStyles.java.

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[Bug 58838] Some cells are null when they aren't

Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58838

--- Comment #4 from Michele <mi...@gmail.com> ---
Created attachment 33430
  --> https://bz.apache.org/bugzilla/attachment.cgi?id=33430&action=edit
BLSintesi_VerReport.java

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[Bug 58838] Some cells are null when they aren't

Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58838

Michele <mi...@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #9 from Michele <mi...@gmail.com> ---
Unluckyly, I don't know why some cell results null and I am not able to create
a small program for reproduce the same problem.

But if I had said I get the report from another program/office/collegue or the
report was created with a tool different from POI instead create it by myself
with POI?
The problem remains the same.

I don't understand why I can't read some cells when these cells have correctly
a value (or a formula) and I can see these values using Excel. So the values
exist (and they are saved) somewhere into the file and POI isn't able to read
it, I don't know why.

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[Bug 58838] Some cells are null when they aren't

Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58838

--- Comment #5 from Michele <mi...@gmail.com> ---
Created attachment 33431
  --> https://bz.apache.org/bugzilla/attachment.cgi?id=33431&action=edit
BLSintesi_XlsStyles.java

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[Bug 58838] Some cells are null when they aren't

Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58838

--- Comment #10 from Dominik Stadler <do...@gmx.at> ---
initial attempt at a unit test for this:

    @Test
    public void testBug58838() throws IOException {
        Workbook wb = HSSFTestDataSamples.openSampleWorkbook("58838.xls");

        Sheet sheet = wb.getSheet("InitCharge");
        Row row = sheet.getRow(1);

        //int lastCol = CellReference.convertColStringToIndex("BC");
        for (int c=0; c <= row.getLastCellNum(); c++) {
            Cell cell = row.getCell(c);
            if (cell != null) {
                System.out.print(new CellReference(1, c).formatAsString() + ",
");
            } else {
                System.out.print("(" + new CellReference(1, c).formatAsString()
+ "), ");
            }
        }

        wb.close();
    }

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