SelectSheetsForStreamingPoiTransformer not working correctly

Hi,

I am using the example here: https://github.com/jxlsteam/jxls/blob/master/jxls-poi/src/test/java/org/jxls/examples/stress/SxssfDemo.java

method: simpleSxssf()

I am trying to use the SelectSheetsForStreamingPoiTransformer like this:

I copy the sheet “Template” into a second sheet “NoStreaming”. I adapt the method simpleSxssf() to only stream the “Template” sheet:

Context context = new Context();
context.putVar("cellRefUpdater", new CellRefUpdater());
context.putVar("employees", employees);
context.getConfig().setIsFormulaProcessingRequired(false);
Workbook workbook = WorkbookFactory.create(is);
SelectSheetsForStreamingPoiTransformer transformer = new SelectSheetsForStreamingPoiTransformer(workbook);
Set<String> streamingSheets = new HashSet<>();
streamingSheets.add("Template");
transformer.setDataSheetsToUseStreaming(streamingSheets);
//transformer.setEvaluateFormulas(true); // used with newest JXLS version
processTemplate(context, transformer);
workbook.write(os);

private void processTemplate(Context context, Transformer transformer) {
        XlsCommentAreaBuilder areaBuilder = new XlsCommentAreaBuilder();
        areaBuilder.setTransformer(transformer);
        List<Area> xlsAreaList = areaBuilder.build();
        for (Area xlsArea : xlsAreaList) {
            xlsArea.applyAt(new CellRef(xlsArea.getStartCellRef().getCellName()), context);
        }
    }

but I am getting the outputs in the screenshot. What is going wrong here?

Using jxls 2.8.1

[edu-de]

Ok, for completeness, this code seems to work for SelectSheetsForStreamingPoiTransformer:

Context context = new Context();
            	context.putVar("employees", employees);
            	context.putVar("departments", departments);
            	
            	Workbook workbook = WorkbookFactory.create(is);
            	SelectSheetsForStreamingPoiTransformer transformer = new SelectSheetsForStreamingPoiTransformer(workbook);
            	Set<String> streamingSheets = new HashSet<>();
            	
            	int nrSheets = workbook.getNumberOfSheets();
            	for ( int i = 0; i < nrSheets; i++ ) {
            		streamingSheets.add(workbook.getSheetName( i ));
            	}
            	transformer.setDataSheetsToUseStreaming(streamingSheets);
            	processTemplate(context, transformer);
            	transformer.getWorkbook().write(os);
            	if (transformer.getWorkbook() instanceof SXSSFWorkbook) {
                    ((SXSSFWorkbook) transformer.getWorkbook()).dispose();
            	}

[edu-de]

Hi SoltauFintel ,

how exactly do you mean this? transformer.getWorkbook(); only gives a workbook back. So where to use this workbook in the code ?

context.putVar("cellRefUpdater", new CellRefUpdater());
context.getConfig().setIsFormulaProcessingRequired(false);
Workbook workbook = WorkbookFactory.create(is);
SelectSheetsForStreamingPoiTransformer transformer = new SelectSheetsForStreamingPoiTransformer(workbook);
Workbook w = transformer.getWorkbook(); // what to do with this workbook ?
 Set<String> streamingSheets = new HashSet<>();
streamingSheets.add("Template");
transformer.setDataSheetsToUseStreaming(streamingSheets);
//transformer.setEvaluateFormulas(true); // used with newest JXLS version
processTemplate(context, transformer);
workbook.write(os);