protected final InternalWorkbook _book;
protected final HSSFWorkbook _workbook;
private HSSFPatriarch _patriarch;
- private int _firstrow;
- private int _lastrow;
+ private int _firstrow = -1;
+ private int _lastrow = -1;
/**
* Creates new HSSFSheet - called by HSSFWorkbook to create a sheet from
_firstrow = findFirstRow(_firstrow);
}
_sheet.removeRow(hrow.getRowRecord());
+
+ // if there are no more rows, then reset first/last
+ if(_rows.size() == 0) {
+ _firstrow = -1;
+ _lastrow = -1;
+ }
}
}
* than expected!
*
* @return the number of the first logical row on the sheet (0-based)
+ * or -1 if no row exists
*/
int getFirstRowNum();
* method will include such rows and thus the returned value might be higher
* than expected!
*
- * @return last row contained on this sheet (0-based)
+ * @return last row contained on this sheet (0-based) or -1 if no row exists
*/
int getLastRowNum();
if(_writer.getNumberOfFlushedRows() > 0) {
return _writer.getLowestIndexOfFlushedRows();
}
- return _rows.size() == 0 ? 0 : _rows.firstKey();
+ return _rows.size() == 0 ? -1 : _rows.firstKey();
}
/**
@Override
public int getLastRowNum()
{
- return _rows.size() == 0 ? 0 : _rows.lastKey();
+ return _rows.size() == 0 ? -1 : _rows.lastKey();
}
/**
*/
@Override
public int getFirstRowNum() {
- return _rows.isEmpty() ? 0 : _rows.firstKey();
+ return _rows.isEmpty() ? -1 : _rows.firstKey();
}
/**
// A test with 1_000_000 rows shows that querying getLastRowNum with lastKey() implementation takes ~40 ms,
// and ~1.2 ms with cached implementation. 40 ms is negligible compared to the time of evaluation a million
// cells, and the lastKey implementation is much more elegant and less error prone than caching.
- return _rows.isEmpty() ? 0 : _rows.lastKey();
+ return _rows.isEmpty() ? -1 : _rows.lastKey();
}
@Override
assertEquals(1, wb1.getSheetAt(0).getLastRowNum());
assertEquals(0, wb1.getSheetAt(1).getFirstRowNum());
assertEquals(0, wb1.getSheetAt(1).getLastRowNum());
- assertEquals(0, wb1.getSheetAt(2).getFirstRowNum());
- assertEquals(0, wb1.getSheetAt(2).getLastRowNum());
+ assertEquals(-1, wb1.getSheetAt(2).getFirstRowNum());
+ assertEquals(-1, wb1.getSheetAt(2).getLastRowNum());
File file = TempFile.createTempFile("poi-", ".xlsx");
OutputStream out = new FileOutputStream(file);
assertEquals(1, wb2.getSheetAt(0).getLastRowNum());
assertEquals(0, wb2.getSheetAt(1).getFirstRowNum());
assertEquals(0, wb2.getSheetAt(1).getLastRowNum());
- assertEquals(0, wb2.getSheetAt(2).getFirstRowNum());
- assertEquals(0, wb2.getSheetAt(2).getLastRowNum());
+ assertEquals(-1, wb2.getSheetAt(2).getFirstRowNum());
+ assertEquals(-1, wb2.getSheetAt(2).getLastRowNum());
sheet1 = wb2.getSheetAt(0);
assertEquals(1.2, sheet1.getRow(0).getCell(0).getNumericCellValue(), 0.0001);
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet s = wb.createSheet();
- // No rows, everything is 0
- assertEquals(0, s.getFirstRowNum());
- assertEquals(0, s.getLastRowNum());
+ // No rows, first/last return -1
+ assertEquals(-1, s.getFirstRowNum());
+ assertEquals(-1, s.getLastRowNum());
assertEquals(0, s.getPhysicalNumberOfRows());
// One row, most things are 0, physical is 1
assertNull(f1);
}
}
+
+ @Test
+ public void testLastRowEmptySheet() {
+ Workbook wb = _testDataProvider.createWorkbook();
+ Sheet sheet = wb.createSheet("sheet1");
+
+ assertEquals("Sheet without rows should return -1 as lastRowNum",
+ -1, sheet.getLastRowNum());
+ Row row = sheet.createRow(0);
+ assertNotNull(row);
+
+ assertEquals("Sheet with one row should return 0 as lastRowNum",
+ 0, sheet.getLastRowNum());
+ }
+
+ @Test
+ public void testFirstRowEmptySheet() {
+ Workbook wb = _testDataProvider.createWorkbook();
+ Sheet sheet = wb.createSheet("sheet1");
+
+ assertEquals("Sheet without rows should return -1 as firstRowNum",
+ -1, sheet.getFirstRowNum());
+ Row row = sheet.createRow(0);
+ assertNotNull(row);
+
+ assertEquals("Sheet with one row should return 0 as firstRowNum",
+ 0, sheet.getFirstRowNum());
+ }
}
Workbook workbook = _testDataProvider.createWorkbook();
Sheet sheet1 = workbook.createSheet();
assertEquals(0, sheet1.getPhysicalNumberOfRows());
- assertEquals(0, sheet1.getFirstRowNum());
- assertEquals(0, sheet1.getLastRowNum());
+ assertEquals(-1, sheet1.getFirstRowNum());
+ assertEquals(-1, sheet1.getLastRowNum());
Row row0 = sheet1.createRow(0);
assertEquals(1, sheet1.getPhysicalNumberOfRows());
assertEquals(0, sheet1.getLastRowNum());
sheet1.removeRow(row0);
assertEquals(0, sheet1.getPhysicalNumberOfRows());
- assertEquals(0, sheet1.getFirstRowNum());
- assertEquals(0, sheet1.getLastRowNum());
+ assertEquals(-1, sheet1.getFirstRowNum());
+ assertEquals(-1, sheet1.getLastRowNum());
sheet1.createRow(1);
Row row2 = sheet1.createRow(2);
Sheet underlyingSheet = sheetPair.getKey();
EvaluationSheet instance = sheetPair.getValue();
- assertEquals(0, instance.getLastRowNum());
+ assertEquals(-1, instance.getLastRowNum());
underlyingSheet.createRow(0);
underlyingSheet.createRow(1);