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Export to HTML causes ClassCastException on Copied Worksheet

We are seeing a ClassCastException on a worksheet that is being exported to HTML. The symptoms are:

  1. The worksheet to be exported as HTML has a named range.
  2. There is a second worksheet which has an “inter-workbook” hyperlink that points to the named range (in the first worksheet).
  3. Before export, we make a copy of the worksheet with the named range.
  4. When we try to save the workbook with HtmlSaveOptions, a ClassCastException is thrown.
To reproduce this issue download the attached “InterLinks.xlsx” file, then compile and execute the following code:

try {
String path = “InterLinks.xlsx”; // adjust to local path
String namedRng = “SampleRange”;
<span style="color: rgb(0, 0, 0);">Workbook wb = </span><span style="color: rgb(0, 0, 255);">new </span><span style="color: rgb(0, 0, 0);">Workbook(path);</span>
<span style="color: rgb(0, 0, 128);">Name </span><span style="color: rgb(0, 0, 0);">name = wb.getWorksheets().getNames().get(namedRng);</span>

<span style="color: rgb(0, 128, 0);">// <b>copy</b> the target worksheet to be exported as HTML</span>
<span style="color: rgb(0, 0, 255);">int </span><span style="color: rgb(0, 0, 0);">sheetIdx = name.getRange().getWorksheet().getIndex();</span>
<span style="color: rgb(0, 0, 0);">sheetIdx = wb.getWorksheets().addCopy(sheetIdx);</span>
<span style="color: rgb(0, 0, 0);">wb.getWorksheets().setActiveSheetIndex(sheetIdx);</span>

<span style="color: rgb(0, 128, 0);">// export the active worksheet (i.e. copied worksheet)</span>
<span style="color: rgb(0, 0, 0);">HtmlSaveOptions options = </span><span style="color: rgb(0, 0, 255);">new </span><span style="color: rgb(0, 0, 0);">HtmlSaveOptions(SaveFormat.</span><span style="color: rgb(0, 0, 128);">HTML</span><span style="color: rgb(0, 0, 0);">);</span>
<span style="color: rgb(0, 0, 0);">options.setEncoding(</span><span style="color: rgb(0, 0, 128);">Encoding</span><span style="color: rgb(0, 0, 0);">.getUTF8());</span>
<span style="color: rgb(0, 0, 0);">options.setPresentationPreference(</span><span style="color: rgb(0, 0, 255);">true</span><span style="color: rgb(0, 0, 0);">);</span>
<span style="color: rgb(0, 0, 0);">options.setExportActiveWorksheetOnly(</span><span style="color: rgb(0, 0, 255);">true</span><span style="color: rgb(0, 0, 0);">);</span>
<span style="color: rgb(0, 0, 0);">options.setExportImagesAsBase64(</span><span style="color: rgb(0, 0, 255);">true</span><span style="color: rgb(0, 0, 0);">);</span>

<span style="color: rgb(0, 0, 0);">wb.save(path.replace(</span><span style="color: rgb(85, 85, 85);">".xlsx"</span><span style="color: rgb(0, 0, 0);">, </span><span style="color: rgb(85, 85, 85);">".html"</span><span style="color: rgb(0, 0, 0);">), options); </span></font><font face="Courier New"><span style="color: rgb(0, 0, 0);"><font face="Courier New"><span style="color: rgb(0, 128, 0);">// exception happens here</span></font></span>

} catch (Exception ex) {
System.out.println(“Unexpected EXCEPTION: \n\t” + ex.getClass().getName() + " - " +
ex.getMessage());
ex.printStackTrace();
}

You should see the following output:
Unexpected EXCEPTION:
java.lang.ClassCastException - com.aspose.cells.Name cannot be cast to java.lang.Integer
java.lang.ClassCastException: com.aspose.cells.Name cannot be cast to java.lang.Integer
at com.aspose.cells.NameCollection.a(Unknown Source)
at com.aspose.cells.Hyperlink.a(Unknown Source)
at com.aspose.cells.zafw.a(Unknown Source)
at com.aspose.cells.zaey.a(Unknown Source)
at com.aspose.cells.zaey.(Unknown Source)
at com.aspose.cells.zaet.(Unknown Source)
at com.aspose.cells.Workbook.save(Unknown Source)
at AsposeCellsTest.testHyperlinkBug(AsposeCellsTest.java:1725)
at AsposeCellsTest.main(AsposeCellsTest.java:123)

If you remove the hyperlink in the second worksheet, the export to HTML works as expected. However, we’d prefer not to have to modify the rest of the workbook to workaround this issue.

We’ve reproduced this issue under:
  • Aspose Cells Version 8.7.1
  • Windows 7 running Java 1.7.0_85 and
  • LINUX 5 running Java 1.7.0_85.

Thanks.

Hi,


Thank you for sharing the sample spreadsheet.

I have evaluated the presented scenario against the latest version of Aspose.Cells for Java 8.7.1.4 (attached), and I am not able to observe any exception. I have attached the resultant HTML here in an archive for your reference. Please give a try to the latest version f the API on your end as well. In case the problem persists, please share the locale settings of your Windows based machine.