Table Alignment Issue in DOCX to PDF Conversion

[dcaruso-RatedPower]

Hello, can you please help me on this issue? Thanks a lot.

Problem

When converting a XWPF document with centered tables to PDF using the fr.opensagres.xdocreport:fr.opensagres.poi.xwpf.converter.pdf.PdfConverter, the tables appear left-aligned in the output PDF.

You can find attached a screenshot that highlights the issue. (DOCX on the left and PDF on the right).

Possible Root Cause

There's a value mismatch between the alignment enums used:

• In TableRowAlign: CENTER(STJcTable.INT_CENTER) = 1
• In ParagraphAlignment: CENTER(STJc.INT_CENTER) = 2

The TableAlignmentValueProvider incorrectly uses ParagraphAlignment.valueOf(tblPr.getJc().getVal().intValue()),
causing it to interpret value 1 (CENTER in table context) as START in paragraph context.

Expected Behavior

Table alignment should be correctly preserved when converting from DOCX to PDF.

Test to reproduce the issue

This is a test that reproduce the issue, I attached this template.docx that you can use to run the test. This template should be added to a test folder.

import fr.opensagres.poi.xwpf.converter.pdf.PdfConverter;
import fr.opensagres.poi.xwpf.converter.pdf.PdfOptions;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.junit.jupiter.api.Test;

import java.io.FileOutputStream;
import java.io.File;

class TableAlignmentTest {

    @Test
    void testDemonstrateTableAlignmentIssue() throws Exception {
        // Get test directory path
        String testDir = System.getProperty("user.dir") + "/test/";

        // Create directory if it doesn't exist
        new File(testDir).mkdirs();

        String docxPath = testDir + "centered_table-" + System.currentTimeMillis() + ".docx";
        String pdfPath = testDir + "centered_table-" + System.currentTimeMillis() + ".pdf";

        // Create a document with a centered table
        String templateFile = testDir + "template.docx";
        XWPFDocument document = new XWPFDocument(new java.io.FileInputStream(templateFile));

        // Save DOCX
        try (FileOutputStream out = new FileOutputStream(docxPath)) {
            document.write(out);
        }

        // Convert to PDF
        PdfOptions options = PdfOptions.create();
        try (FileOutputStream out = new FileOutputStream(pdfPath)) {
            PdfConverter.getInstance().convert(document, out, options);
        }

        // Log files location
        System.out.println("Files saved to: " + testDir);

        // The table present in the PDF is not centered
    }
}