https://bz.apache.org/bugzilla/show_bug.cgi?id=69777
Bug ID: 69777
Summary: When using XSSF, calling
cell.setCellType(CellType.STRING) on a cell with
original type STCellType.INLINE_STR results in the
cell value becoming empty.
Product: POI
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P2
Component: XSSF
Assignee: dev@poi.apache.org
Reporter: trevi...@gmail.com
Target Milestone: ---
** Description:
In Apache POI (XSSF), if a cell’s underlying type is STCellType.INLINE_STR
(inline string), manually converting it to CellType.STRING using:
```
cell.setCellType(CellType.STRING);
```
will cause the cell value to become empty (""). This behavior seems
inconsistent, since one would expect the conversion to preserve the string
content.
** Steps to Reproduce:
1. Create or open an XLSX file containing a cell with type inlineStr in XML
(can be generated by some spreadsheet editors).
2. Read the file with XSSF.
3. Call `cell.setCellType(CellType.STRING)` on that cell.
4. Check the cell value with cell.getStringCellValue() — it will be empty.
** Expected Behavior:
The original inline string content should be preserved after converting the
cell type to CellType.STRING.
** Actual Behavior:
The cell content becomes empty after the type change.
** Example Code:
```
try (InputStream is = Files.newInputStream(Paths.get("inlineStr.xlsx"));
Workbook wb = new XSSFWorkbook(is)) {
Sheet sheet = wb.getSheetAt(0);
Cell cell = sheet.getRow(0).getCell(0);
System.out.println("Before: " + cell.getStringCellValue()); // original
inline string content
cell.setCellType(CellType.STRING);
System.out.println("After: " + cell.getStringCellValue()); // becomes empty
}
```
** Possible Cause:
When calling cell.setCellType(CellType.STRING), the implementation appears to
only set
```
/**
* org.apache.poi.xssf.usermodel.XSSFCell:893
*/
this._cell.setT(STCellType.S);
```
without copying the original inlineStr value into the `_sharedStringSource`.
As a result, after the cell type change, `getStringCellValue()` attempts to
retrieve the value from the `_sharedStringSource` table, but since the value
was never added, it ends up returning an empty string.
```
/**
* org.apache.poi.xssf.usermodel.XSSFCell:314
*/
private XSSFRichTextString findStringValue() {
XSSFRichTextString rt;
STCellType.Enum xmlbeanCellType = _cell.getT();
if (xmlbeanCellType == STCellType.INLINE_STR) {
if(_cell.isSetIs()) {
//string is expressed directly in the cell definition instead
of implementing the shared string table.
rt = new XSSFRichTextString(_cell.getIs());
} else if (_cell.isSetV()) {
//cached result of a formula
rt = new XSSFRichTextString(_cell.getV());
} else {
rt = new XSSFRichTextString("");
}
} else if (xmlbeanCellType == STCellType.STR) {
//cached formula value
rt = new XSSFRichTextString(_cell.isSetV() ? _cell.getV() : "");
} else {
if (_cell.isSetV()) {
try {
int idx = Integer.parseInt(_cell.getV());
rt =
(XSSFRichTextString)_sharedStringSource.getItemAt(idx);
} catch (Throwable t) {
if (ExceptionUtil.isFatal(t)) {
ExceptionUtil.rethrow(t);
}
rt = new XSSFRichTextString("");
}
} else {
rt = new XSSFRichTextString(""); // <-- ends up here
}
}
return rt;
}
```
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