getting error when adding bullet to word document with apache poi

Question

I'm adding bullets to my word document with apache poi. When I want to convert my word document to pdf file via XDocReport library, i'm getting this nullpointerexception on listContext error.

    11:46:28,364 SEVERE [javax.enterprise.resource.webcontainer.jsf.context] (default task-5) fr.opensagres.xdocreport.converter.XDocConverterException: fr.opensagres.poi.xwpf.converter.core.XWPFConverterException: java.lang.NullPointerException
        at fr.opensagres.xdocreport.converter.docx.poi.itext.XWPF2PDFViaITextConverter.convert(XWPF2PDFViaITextConverter.java:72)
        at com.utc.pw.ui.TestWSV2500View.createTestWS(TestWSV2500View.java:6345)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at com.sun.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:181)
        at com.sun.el.parser.AstValue.invoke(AstValue.java:289)
        at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304)
        
    Caused by: java.lang.NullPointerException
        at fr.opensagres.poi.xwpf.converter.core.ListContext.addItem(ListContext.java:48)
        at fr.opensagres.poi.xwpf.converter.core.XWPFDocumentVisitor.visitParagraph(XWPFDocumentVisitor.java:352)
        at fr.opensagres.poi.xwpf.converter.core.XWPFDocumentVisitor.visitBodyElements(XWPFDocumentVisitor.java:231)
        at fr.opensagres.poi.xwpf.converter.core.XWPFDocumentVisitor.visitTableCellBody(XWPFDocumentVisitor.java:1141)
        at fr.opensagres.poi.xwpf.converter.core.XWPFDocumentVisitor.visitCell(XWPFDocumentVisitor.java:1076)
        at fr.opensagres.poi.xwpf.converter.core.XWPFDocumentVisitor.visitTableRow(XWPFDocumentVisitor.java:1024)
        at fr.opensagres.poi.xwpf.converter.core.XWPFDocumentVisitor.visitTableBody(XWPFDocumentVisitor.java:918)
        at fr.opensagres.poi.xwpf.converter.core.XWPFDocumentVisitor.visitTable(XWPFDocumentVisitor.java:900)
        at fr.opensagres.poi.xwpf.converter.core.XWPFDocumentVisitor.visitBodyElements(XWPFDocumentVisitor.java:235)
        at fr.opensagres.poi.xwpf.converter.core.XWPFDocumentVisitor.start(XWPFDocumentVisitor.java:183)
        at fr.opensagres.poi.xwpf.converter.pdf.PdfConverter.doConvert(PdfConverter.java:57)
        ... 83 more

My bullet codes is in here

   //Bullet
        CTAbstractNum cTAbstractNum = CTAbstractNum.Factory.newInstance();
        cTAbstractNum.setAbstractNumId(BigInteger.valueOf(0));
        CTLvl cTLvl = cTAbstractNum.addNewLvl();
        cTLvl.addNewNumFmt().setVal(STNumberFormat.BULLET);
        cTLvl.addNewLvlText().setVal("•");
        XWPFAbstractNum abstractNum = new XWPFAbstractNum(cTAbstractNum);
        XWPFNumbering numbering = document.createNumbering();
        BigInteger abstractNumID = numbering.addAbstractNum(abstractNum);
        BigInteger numID = numbering.addNum(abstractNumID);
        ListContext list=new ListContext();
        list.createAndAddItem(cTLvl);
        
        XWPFParagraph paragraph_cell2_table17=cell1_table17.addParagraph();
        paragraph_cell2_table17.setSpacingBefore(10);
        paragraph_cell2_table17.setSpacingAfter(10);
        paragraph_cell2_table17.setIndentationLeft(500);
        paragraph_cell2_table17.setVerticalAlignment(TextAlignment.CENTER);
        paragraph_cell2_table17.setAlignment(ParagraphAlignment.LEFT);
        paragraph_cell2_table17.setNumID(numID);
        cell1_table17.setVerticalAlignment(XWPFVertAlign.CENTER);
        paragraph_cell2_table17.getCTP().getPPr().addNewRPr().addNewSz().setVal(BigInteger.valueOf(24));
        XWPFRun run_cell2_table17=paragraph_cell2_table17.createRun();
        run_cell2_table17.setText("If the Engine shows a stabilized (>3sec) Vibration Level above 1.0 ips: perform the necessary Troubleshootings to make sure it is an Engine related vibration. If Vibration Level is still above 1.0 ips after performed extensive Troubleshootings: DO NOT continue the Test.");
        run_cell2_table17.setFontFamily("Arial");
        run_cell2_table17.setFontSize(10);
        run_cell2_table17.setUnderline(UnderlinePatterns.SINGLE);
        

Am I miss something? Do you guys have any idea?

Answer 1

Your created bullet list only has one indent level. That's why the indent level is not set at all and Microsoft Word will be fine with this.

But XDocReport expects an indent level set for each numbering level. So if XDocReport shall work, the indent level needs to be set even if there is only one.

So:

    ...
    CTLvl cTLvl = cTAbstractNum.addNewLvl();
    cTLvl.setIlvl(BigInteger.valueOf(0)); // set indent level 0
    cTLvl.addNewNumFmt().setVal(STNumberFormat.BULLET);
    cTLvl.addNewLvlText().setVal("•");
    ...

Btw.: The ListContext is unnecessary here. XDocReport creates that context while parsing the document. So code ListContext list=new ListContext(); list.createAndAddItem(cTLvl); should be removed.