How to fix '0 level missing for abstractListDefinition 0' error when using Emulator.getNumber() - docx4j

Question

I used docx4j to read the docx file. And I need to read the paragraph number format characters. I use Emulator.getNumber() to process, but I got this error. How should I deal with it?
try {
PPr pPr = ((P) p).getPPr();
if (pPr != null && pPr.getNumPr() != null) {
Emulator.ResultTriple triple = Emulator.getNumber(wordprocessingMLPackage, pPr);
if (triple != null) {
order = triple.getNumString();
}
}
} catch (Exception e) {
// throw error '0 level missing for abstractListDefinition 0'
e.printStackTrace();
}
Any help would be appreciated.Thanks.
docx4j version: 6.1.2

Answer 1

docx4j's html output uses it like so:
// Numbering
String numberText=null;
String numId=null;
String levelId=null;
if (pPrDirect.getNumPr()!=null) {
numId = pPrDirect.getNumPr().getNumId()==null ? null : pPrDirect.getNumPr().getNumId().getVal().toString();
levelId = pPrDirect.getNumPr().getIlvl()==null ? null : pPrDirect.getNumPr().getIlvl().getVal().toString();
}
ResultTriple triple = org.docx4j.model.listnumbering.Emulator.getNumber(
conversionContext.getWmlPackage(), pStyleVal, numId, levelId);
if (triple==null) {
getLog().debug("computed number ResultTriple was null");
} else {
if (triple.getBullet() != null) {
//numberText = (triple.getBullet() + " ");
numberText = "\u2022 ";
} else if (triple.getNumString() == null) {
getLog().error("computed NumString was null!");
numberText = ("?");
} else {
numberText = (triple.getNumString() + " ");
}
}
if (numberText!=null) {
currentParent.appendChild(document.createTextNode(
numberText + " "));
}
XSL-FO output:
if (pPrDirect!=null && pPrDirect.getNumPr()!=null) {
triple = org.docx4j.model.listnumbering.Emulator.getNumber(
conversionContext.getWmlPackage(), pStyleVal,
pPrDirect.getNumPr().getNumId().getVal().toString(),
pPrDirect.getNumPr().getIlvl().getVal().toString() );
} else {
// Get the effective values; since we already know this,
// save the effort of doing this again in Emulator
Ilvl ilvl = pPr.getNumPr().getIlvl();
String ilvlString = ilvl == null ? "0" : ilvl.getVal().toString();
triple = null;
if (pPr.getNumPr().getNumId()!=null) {
triple = org.docx4j.model.listnumbering.Emulator.getNumber(
conversionContext.getWmlPackage(), pStyleVal,
pPr.getNumPr().getNumId().getVal().toString(),
ilvlString );
}
}