[bug-64536] add getDimension on XSSFSheet

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1899091 13f79535-47bb-0310-9956-ffa450edef68

poi-ooxml/src/main/java/org/apache/poi/xssf/usermodel/XSSFSheet.java

         safeGetProtectionField().setSelectUnlockedCells(enabled);
     }
 
+    /**
+     * Reads the dimensions of the sheet data
+     * @return dimensions of the sheet data as a Cell Range (can be null)
+     * @since POI 5.2.3
+     */
+    public CellRangeAddress getDimension() {
+        CTSheetDimension ctSheetDimension = worksheet.getDimension();
+        String ref = ctSheetDimension == null ? null : ctSheetDimension.getRef();
+        if (ref != null) {
+            return CellRangeAddress.valueOf(ref);
+        }
+        return null;
+    }
+
     private CTSheetProtection safeGetProtectionField() {
         if (!isSheetProtectionEnabled()) {
             return worksheet.addNewSheetProtection();

poi-ooxml/src/test/java/org/apache/poi/xssf/usermodel/TestXSSFSheet.java

             assertTrue(row2.getZeroHeight());
         }
     }
+
+    @Test
+    void testBug64536() throws IOException {
+        try (
+                XSSFWorkbook xssfWorkbook = (XSSFWorkbook) _testDataProvider.openSampleWorkbook("1_NoIden.xlsx");
+                UnsynchronizedByteArrayOutputStream bos = new UnsynchronizedByteArrayOutputStream()
+        ) {
+            XSSFSheet fileSheet = xssfWorkbook.getSheetAt(0);
+            assertEquals(CellRangeAddress.valueOf("B1:D9"), fileSheet.getDimension());
+
+            // Create Row and Cell, Then Set a Value
+            // 5, 2, 4 is just random number for test
+            Row fileRow = fileSheet.createRow(5);
+            Cell fileCell = fileRow.createCell(2, CellType.STRING);
+            fileCell.setCellValue("TEST VALUE");
+
+            xssfWorkbook.write(bos);
+
+            try (XSSFWorkbook xssfWorkbook2 = new XSSFWorkbook(bos.toInputStream())) {
+                XSSFSheet xssfSheet = xssfWorkbook2.getSheetAt(0);
+                assertEquals(CellRangeAddress.valueOf("B1:F9"), xssfSheet.getDimension());
+            }
+        }
+    }
 }