Crashes on certain docx files

[Richard Grimmett]

I am using the sample provided to convert from docx to pdf via iText:

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
 
import org.apache.poi.xwpf.converter.pdf.PdfConverter;
import org.apache.poi.xwpf.converter.pdf.PdfOptions;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
 
public class Conv2 {
 
    public static void main(String[] args) {
        createPDF();
        createPDF();
    }
 
    private static void createPDF() {
        try {
            long start = System.currentTimeMillis();
 
            // 1) Load DOCX into XWPFDocument
            InputStream is = new FileInputStream(new File(
                    "c://javamtas//test2.docx"));
            XWPFDocument document = new XWPFDocument(is);
 
            // 2) Prepare Pdf options
            PdfOptions options = PdfOptions.create();
 
            // 3) Convert XWPFDocument to Pdf
            OutputStream out = new FileOutputStream(new File(
                    "c://javamtas//test.pdf"));
            PdfConverter.getInstance().convert(document, out, options);
             
            System.err.println("Generate pdf with "
                    + (System.currentTimeMillis() - start) + "ms");
             
        } catch (Throwable e) {
            e.printStackTrace();
        }
    }
}

This works when given simple docx files.  But when I give it more compelx ones such as that which is attached it crashes with:

org.apache.poi.xwpf.converter.core.XWPFConverterException: java.lang.NullPointerException
    at org.apache.poi.xwpf.converter.pdf.PdfConverter.doConvert(PdfConverter.java:59)
    at org.apache.poi.xwpf.converter.pdf.PdfConverter.doConvert(PdfConverter.java:37)
    at org.apache.poi.xwpf.converter.core.AbstractXWPFConverter.convert(AbstractXWPFConverter.java:45)
    at com.mtas.alcoa.Conv2.createPDF(Conv2.java:36)
    at com.mtas.alcoa.Conv2.main(Conv2.java:17)
Caused by: java.lang.NullPointerException
    at org.apache.poi.xwpf.converter.core.styles.AbstractValueProvider.getValueFromTableStyleIdRow(AbstractValueProvider.java:153)
    at org.apache.poi.xwpf.converter.core.styles.AbstractValueProvider.getValueFromTableStyleId(AbstractValueProvider.java:126)
    at org.apache.poi.xwpf.converter.core.styles.AbstractValueProvider.getValueFromStyles(AbstractValueProvider.java:101)
    at org.apache.poi.xwpf.converter.core.styles.AbstractValueProvider.internalGetValue(AbstractValueProvider.java:61)
    at org.apache.poi.xwpf.converter.core.styles.AbstractValueProvider.getValue(AbstractValueProvider.java:41)
    at org.apache.poi.xwpf.converter.core.styles.XWPFStylesDocument.getTableCellVMerge(XWPFStylesDocument.java:1067)
    at org.apache.poi.xwpf.converter.core.XWPFDocumentVisitor.getVMergedCells(XWPFDocumentVisitor.java:1005)
    at org.apache.poi.xwpf.converter.core.XWPFDocumentVisitor.visitTableRow(XWPFDocumentVisitor.java:922)
    at org.apache.poi.xwpf.converter.core.XWPFDocumentVisitor.visitTableBody(XWPFDocumentVisitor.java:848)
    at org.apache.poi.xwpf.converter.core.XWPFDocumentVisitor.visitTable(XWPFDocumentVisitor.java:830)
    at org.apache.poi.xwpf.converter.core.XWPFDocumentVisitor.visitBodyElements(XWPFDocumentVisitor.java:246)
    at org.apache.poi.xwpf.converter.core.XWPFDocumentVisitor.start(XWPFDocumentVisitor.java:194)
    at org.apache.poi.xwpf.converter.pdf.PdfConverter.doConvert(PdfConverter.java:55)
    ... 4 more
org.apache.poi.xwpf.converter.core.XWPFConverterException: java.lang.NullPointerException
    at org.apache.poi.xwpf.converter.pdf.PdfConverter.doConvert(PdfConverter.java:59)
    at org.apache.poi.xwpf.converter.pdf.PdfConverter.doConvert(PdfConverter.java:37)
    at org.apache.poi.xwpf.converter.core.AbstractXWPFConverter.convert(AbstractXWPFConverter.java:45)
    at com.mtas.alcoa.Conv2.createPDF(Conv2.java:36)
    at com.mtas.alcoa.Conv2.main(Conv2.java:18)
Caused by: java.lang.NullPointerException
    at org.apache.poi.xwpf.converter.core.styles.AbstractValueProvider.getValueFromTableStyleIdRow(AbstractValueProvider.java:153)
    at org.apache.poi.xwpf.converter.core.styles.AbstractValueProvider.getValueFromTableStyleId(AbstractValueProvider.java:126)
    at org.apache.poi.xwpf.converter.core.styles.AbstractValueProvider.getValueFromStyles(AbstractValueProvider.java:101)
    at org.apache.poi.xwpf.converter.core.styles.AbstractValueProvider.internalGetValue(AbstractValueProvider.java:61)
    at org.apache.poi.xwpf.converter.core.styles.AbstractValueProvider.getValue(AbstractValueProvider.java:41)
    at org.apache.poi.xwpf.converter.core.styles.XWPFStylesDocument.getTableCellVMerge(XWPFStylesDocument.java:1067)
    at org.apache.poi.xwpf.converter.core.XWPFDocumentVisitor.getVMergedCells(XWPFDocumentVisitor.java:1005)
    at org.apache.poi.xwpf.converter.core.XWPFDocumentVisitor.visitTableRow(XWPFDocumentVisitor.java:922)
    at org.apache.poi.xwpf.converter.core.XWPFDocumentVisitor.visitTableBody(XWPFDocumentVisitor.java:848)
    at org.apache.poi.xwpf.converter.core.XWPFDocumentVisitor.visitTable(XWPFDocumentVisitor.java:830)
    at org.apache.poi.xwpf.converter.core.XWPFDocumentVisitor.visitBodyElements(XWPFDocumentVisitor.java:246)
    at org.apache.poi.xwpf.converter.core.XWPFDocumentVisitor.start(XWPFDocumentVisitor.java:194)
    at org.apache.poi.xwpf.converter.pdf.PdfConverter.doConvert(PdfConverter.java:55)
    ... 4 more

Any advice please?

Thanks
Richard

[Angelo zerr]

Hi Richard,

Your NPE error can be fixed, but I'm afraid that even with this fix, convertion will not be perfect because our converter must be improved and you docx seems complex.

I have no time today to improve it, so any contribtion are welcome!

Regard's Angelo

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