POI Bug 58260: Fix checks for limit on number of styles in XSSF/SXSSF and fix having more than 32k styles in SXSSF workbooks

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1696586 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/java/org/apache/poi/xssf/model/StylesTable.java

@@ -563,11 +563,12 @@ public class StylesTable extends POIXMLDocumentPart {
     }
 
     public XSSFCellStyle createCellStyle() {
-        int xfSize = styleXfs.size();
+        if (getNumCellStyles() > MAXIMUM_STYLE_ID) {
-        if (xfSize > MAXIMUM_STYLE_ID)
             throw new IllegalStateException("The maximum number of Cell Styles was exceeded. " +
                       "You can define up to " + MAXIMUM_STYLE_ID + " style in a .xlsx Workbook");
+        }
 
+        int xfSize = styleXfs.size();
         CTXf xf = CTXf.Factory.newInstance();
         xf.setNumFmtId(0);
         xf.setFontId(0);

src/ooxml/java/org/apache/poi/xssf/streaming/SheetDataWriter.java

@@ -189,7 +189,12 @@ public class SheetDataWriter {
         String ref = new CellReference(_rownum, columnIndex).formatAsString();
         _out.write("<c r=\"" + ref + "\"");
         CellStyle cellStyle = cell.getCellStyle();
-        if (cellStyle.getIndex() != 0) _out.write(" s=\"" + cellStyle.getIndex() + "\"");
+        if (cellStyle.getIndex() != 0) {
+            // need to convert the short to unsigned short as the indexes can be up to 64k
+            // ideally we would use int for this index, but that would need changes to some more 
+            // APIs
+            _out.write(" s=\"" + (cellStyle.getIndex() & 0xffff) + "\"");
+        }
         int cellType = cell.getCellType();
         switch (cellType) {
             case Cell.CELL_TYPE_BLANK: {

src/testcases/org/apache/poi/ss/usermodel/BaseTestBugzillaIssues.java

@@ -30,6 +30,7 @@ import java.io.IOException;
 import java.text.AttributedString;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Random;
 
 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 import org.apache.poi.hssf.util.PaneInformation;
@@ -775,8 +776,7 @@ public abstract class BaseTestBugzillaIssues {
         
         
         // References to try
-        String ext = "xls";
+        String ext = _testDataProvider.getStandardFileNameExtension();
-        if (! (wb instanceof HSSFWorkbook)) ext += "x";
         String refLocal = "'[test."+ext+"]Sheet1'!$A$2";
         String refHttp  = "'[http://example.com/test."+ext+"]Sheet1'!$A$2";
         String otherCellText = "In Another Workbook";
@@ -1172,4 +1172,74 @@ public abstract class BaseTestBugzillaIssues {
         ev.evaluateFormulaCell(cell);
         assertEquals("ab", cell.getStringCellValue());
     }
+
+    @Test
+    public void bug58260() throws IOException {
+        //Create workbook and worksheet
+        Workbook wb = _testDataProvider.createWorkbook();
+        Sheet worksheet = wb.createSheet("sample");
+
+        //Loop through and add all values from array list
+        // use a fixed seed to always produce the same file which makes comparing stuff easier
+        Random rnd = new Random(4352345);
+        int maxStyles = (wb instanceof HSSFWorkbook) ? 4009 : 64000;
+        for(int i = 0;i < maxStyles;i++) {
+            //Create new row
+            Row row = worksheet.createRow(i);
+
+            //Create cell style
+            final CellStyle style; 
+            try {
+                style = wb.createCellStyle();
+            } catch (IllegalStateException e) {
+                throw new IllegalStateException("Failed for row " + i, e);
+            }
+            style.setAlignment(CellStyle.ALIGN_RIGHT);
+            if((wb instanceof HSSFWorkbook)) {
+                // there are some predefined styles
+                assertEquals(i+21, style.getIndex());
+            } else {
+                // getIndex() returns short, which is not sufficient for > 32767
+                // we should really change the API to be "int" for getIndex() but
+                // that needs API changes
+                assertEquals(i+1, style.getIndex() & 0xffff);
+            }
+
+            //Create cell
+            Cell cell = row.createCell(0);
+
+            //Set cell style
+            cell.setCellStyle(style);
+
+            //Set cell value
+            cell.setCellValue("r" + rnd.nextInt());
+        }
+
+        // should fail if we try to add more now
+        try {
+            wb.createCellStyle();
+            fail("Should fail after " + maxStyles + " styles, but did not fail");
+        } catch (IllegalStateException e) {
+            // expected here
+        }
+        
+        /*//add column width for appearance sake
+        worksheet.setColumnWidth(0, 5000);
+        
+        // Write the output to a file       
+        System.out.println("Writing...");
+        OutputStream fileOut = new FileOutputStream("C:\\temp\\58260." + _testDataProvider.getStandardFileNameExtension());
+        
+        // the resulting file can be compressed nicely, so we need to disable the zip bomb detection here
+        double before = ZipSecureFile.getMinInflateRatio();
+        try {
+            ZipSecureFile.setMinInflateRatio(0.00001);
+            wb.write(fileOut);
+        } finally { 
+            fileOut.close();
+            ZipSecureFile.setMinInflateRatio(before);
+        }*/
+        
+        wb.close();
+    }
 }