class com.lowagie.text.pdf.PdfDictionary cannot be cast to class com.lowagie.text.pdf.PRIndirectReference

[draccagni]

Hello,
reading a pdf file the library rises the following exception:

class com.lowagie.text.pdf.PdfDictionary cannot be cast to class com.lowagie.text.pdf.PRIndirectReference

I temporary solved the issue by adding to the PdfReader class the method:

private void iteratePages(PRIndirectReference rpage) {
  PdfDictionary page = (PdfDictionary) getPdfObject(rpage);
  PdfArray kidsPR = page.getAsArray(PdfName.KIDS);
  // reference to a leaf
  if (kidsPR == null) {
    page.put(PdfName.TYPE, PdfName.PAGE);
    PdfDictionary dic = pageInh.get(pageInh.size() - 1);
    PdfName key;
    for (Object o : dic.getKeys()) {
      key = (PdfName) o;
      if (page.get(key) == null)
        page.put(key, dic.get(key));
    }
    if (page.get(PdfName.MEDIABOX) == null) {
      PdfArray arr = new PdfArray(new float[] { 0, 0,
              PageSize.LETTER.getRight(), PageSize.LETTER.getTop() });
      page.put(PdfName.MEDIABOX, arr);
    }
    refsn.add(rpage);
  }
  // reference to a branch
  else {
    page.put(PdfName.TYPE, PdfName.PAGES);
    pushPageAttributes(page);
    for (int k = 0; k < kidsPR.size(); ++k) {
      PdfObject obj = kidsPR.getPdfObject(k);
      if (!obj.isIndirect()) {
        while (k < kidsPR.size())
          kidsPR.remove(k);
        break;
      }
      if (obj instanceof PRIndirectReference)
        iteratePages((PRIndirectReference) obj);
      else if (obj instanceof PdfDictionary)
        iteratePages((PdfDictionary) obj);
    }
    popPageAttributes();
  }
}

private void iteratePages(PdfDictionary page) {
  PdfArray kidsPR = page.getAsArray(PdfName.KIDS);
  // reference to a leaf
  if (kidsPR != null) {
    page.put(PdfName.TYPE, PdfName.PAGES);
    pushPageAttributes(page);
    for (int k = 0; k < kidsPR.size(); ++k) {
      PdfObject obj = kidsPR.getPdfObject(k);
      if (!obj.isIndirect()) {
        while (k < kidsPR.size())
        kidsPR.remove(k);
        break;
      }
      if (obj instanceof PRIndirectReference)
        iteratePages((PRIndirectReference) obj);
      else if (obj instanceof PdfDictionary)
        iteratePages((PdfDictionary) obj);
    }
    popPageAttributes();
  }
}

by invoking it in the method:

void readPages() {
  if (refsn != null)
    return;
  refsp = null;
  refsn = new ArrayList<>();
  pageInh = new ArrayList<>();
  PdfObject obj = reader.catalog.get(PdfName.PAGES);
  if (obj instanceof PRIndirectReference)
    iteratePages((PRIndirectReference) obj);
  else if (obj instanceof PdfDictionary)
    iteratePages((PdfDictionary) obj);
  pageInh = null;
  reader.rootPages.put(PdfName.COUNT, new PdfNumber(refsn.size()));
}

I hope it is helpful. Could the final fix be included in one of the next releases?

Thanks in advance
PdfReader.java.txt

[andreasrosdal]

Pull requests welcome!