Review

finding-5

com/itextpdf/text/pdf/PdfReader.java

getSinglePage(int)

class PdfReader.PageRefs {
        protected PRIndirectReference getSinglePage(final int n) {
            PdfDictionary acc = new PdfDictionary();
            PdfDictionary top = reader.rootPages;
            int base = 0;
            while (true) {
                for (int k = 0; k < pageInhCandidates.length; ++k) {
                    PdfObject obj = top.get(pageInhCandidates[k]);
                    if (obj != null)
                        acc.put(pageInhCandidates[k], obj);
                }
                PdfArray kids = (PdfArray)PdfReader.getPdfObjectRelease(top.get(PdfName.KIDS));
                for (Iterator<PdfObject> it = kids.listIterator(); it.hasNext();) {
                    PRIndirectReference ref = (PRIndirectReference)it.next();
                    PdfDictionary dic = (PdfDictionary)getPdfObject(ref);
                    int last = reader.lastXrefPartial;
                    PdfObject count = getPdfObjectRelease(dic.get(PdfName.COUNT));
                    reader.lastXrefPartial = last;
                    int acn = 1;
                    if (count != null && count.type() == PdfObject.NUMBER)
                        acn = ((PdfNumber)count).intValue();
                    if (n < base + acn) {
                        if (count == null) {
                            dic.mergeDifferent(acc);
                            return ref;
                        }
                        reader.releaseLastXrefPartial();
                        top = dic;
                        break;
                    }
                    reader.releaseLastXrefPartial();
                    base += acn;
                }
            }
        }

}