Losing table data on second using ElementList

Question

Situation (my task): I need calculate table of contents. My process look like data -> java classes -> xml -> xslt -> html -> parsing to ElementList -> analize element list -> making pdf. On the stage 'xslt' I add marker for points of (future) table contents. On the stage 'analize element list' I make table of contents and clear markers in the Element of ElementList. Up to this point there are no problems. For correct location points page number I have to form pdf several times. The problem occurs when I create a second (or more) time pdf. It looks like the absence of some content (it can be text and / or pictures) in the tables - not all of them disappear.

After first pdf making all content is present. If use second instance ElementList with parsed elements for second pdf making content correct.

What's a problem in resusing ElementList and how fix it ?

ps. itext-5.5.11 + xmlparser-5.5.11

pps. sorry for my poor English

private void test() throws DocumentException, IOException {
    // step 1: get parsed elements
    ElementList list = contentElement.get(BODY).getElements();

    // step 2: bytes for first pdf
    byte[] bytes = getBytes(list);

    // step 3: file 1
    File out = new File("1.pdf");
    FileOutputStream fos = new FileOutputStream(out);
    fos.write(bytes);
    fos.close();

    // step 4: reuse ElementList
    bytes = getBytes(list);

    // step 5: file 2
    out = new File("2.pdf");
    fos = new FileOutputStream(out);
    fos.write(bytes);
    fos.close();

    // Why will it be two different file ?
}

private byte[] getBytes(ElementList list) throws DocumentException, IOException {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    Rectangle page = new Rectangle(PageSize.A4);
    page = page.rotate();
    Document doc = new Document(page, 56, 42, 10, 10);
    Rectangle body = new Rectangle(56, 60, 800, 525);
    writer = PdfWriter.getInstance(doc, baos);
    writer.setPageEvent(this);
    doc.open();
    ColumnText text = new ColumnText(writer.getDirectContent());

    for (Element element : list) {

        text.setText(null);
        text.addElement(element);
        boolean makeNewPage =  ColumnText.hasMoreText(text.go());
        while (makeNewPage) {
            doc.newPage();
            text.setSimpleColumn(body);
            makeNewPage = ColumnText.hasMoreText(text.go());
        }
    }
    doc.close();
    byte[] bytes = baos.toByteArray();
    baos.close();
    return bytes;
}

Some processes "consume" content. E.g. when you add elements to a ColumnText object, and you render the elements, then those elements are gone. ColumnText can be used directly, or indirectly. As you don't show any of your code, nor tell us which version of iText you are using, it is hard to give you a more accurate answer. — Bruno Lowagie
Thanx, for your help, update post: add versions and debug code — keekkenen

keekkenen keekkenen · Accepted Answer · 2017-06-28T21:15:46

The current algorithm not support if div-tag content located into the td-tag. I fixed it - remove div-tag in td-tags.

Losing table data on second using ElementList

1 Answers