https://issues.apache.org/bugzilla/show_bug.cgi?id=46832
Summary: Cannot create Merged Regions when column is bigger
that 255 or row bigger than 65536
Product: POI
Version: 3.5-dev
Platform: PC
OS/Version: Windows Vista
Status: NEW
Severity: major
Priority: P2
Component: XSSF
AssignedTo: [email protected]
ReportedBy: [email protected]
When creating XSSFSheets, it is not possible to ctreate merged regions beyond
the 255 column or 65536 row (HSSF) limits.
Calling sheet.addMergedRegion() requires a parameter of
org.apache.poi.ss.util.CellRangeAddress. This class (CellRangeAddress) calls
super() (CellRangeAddressBase), which throws an IllegalArgumentException
"invalid cell range" if the column is bigger than 255 or the row is bigger than
65536.
CellRangeAddressBase is an abstract base class and should not impose this
restriction on actual implementation classes, e.g. there should be a
HSSFCellRangeAddress (with its specific limits) and a XSSFCellRangeAddress
(with its specific limits), but those classes do not exist (yet?) in
poi-3.5-beta5.
To reproduce run the following code:
final int NUM_COLUMNS = 300;
final String output = "MergedRegions.xlsx";
final int columnSpan = 5;
XSSFWorkbook wb = new XSSFWorkbook();
XSSFSheet sheet = wb.createSheet("sheet1");
// Create two rows.
XSSFRow firstRow = sheet.createRow((short)0);
XSSFRow secondRow = sheet.createRow((short)1);
XSSFCellStyle centeredStyle = wb.createCellStyle();
centeredStyle.setAlignment(HorizontalAlignment.CENTER);
// Create NUM_COLUMNS columns.
for (int column = 0; column < NUM_COLUMNS; column++) {
// Create a new cell in secondRow.
secondRow.createCell(column).setCellValue(column);
if (column % columnSpan == 0) {
// Create a new cell in firstRow spanning over columnSpan cells.
short colFrom = (short)column;
short colTo = (short)(colFrom + columnSpan - 1);
Cell cell = firstRow.createCell(column);
cell.setCellValue("Heading for columns "+colFrom+" to "+colTo);
cell.setCellStyle(centeredStyle);
sheet.addMergedRegion(new CellRangeAddress(0,0,colFrom,colTo));
}
}
FileOutputStream fileOut = new FileOutputStream(output);
wb.write(fileOut);
fileOut.close();
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