iTextSharp.text.pdf.PdfReader.EliminateSharedStreams C# (CSharp) Метод

        public void EliminateSharedStreams() {
            if (!sharedStreams)
                return;
            sharedStreams = false;
            if (pageRefs.Size == 1)
                return;
            ArrayList newRefs = new ArrayList();
            ArrayList newStreams = new ArrayList();
            IntHashtable visited = new IntHashtable();
            for (int k = 1; k <= pageRefs.Size; ++k) {
                PdfDictionary page = pageRefs.GetPageN(k);
                if (page == null)
                    continue;
                PdfObject contents = GetPdfObject(page.Get(PdfName.CONTENTS));
                if (contents == null)
                    continue;
                if (contents.IsStream()) {
                    PRIndirectReference refi = (PRIndirectReference)page.Get(PdfName.CONTENTS);
                    if (visited.ContainsKey(refi.Number)) {
                        // need to duplicate
                        newRefs.Add(refi);
                        newStreams.Add(new PRStream((PRStream)contents, null));
                    }
                    else
                        visited[refi.Number] = 1;
                }
                else if (contents.IsArray()) {
                    PdfArray array = (PdfArray)contents;
                    for (int j = 0; j < array.Size; ++j) {
                        PRIndirectReference refi = (PRIndirectReference)array[j];
                        if (visited.ContainsKey(refi.Number)) {
                            // need to duplicate
                            newRefs.Add(refi);
                            newStreams.Add(new PRStream((PRStream)GetPdfObject(refi), null));
                        }
                        else
                            visited[refi.Number] = 1;
                    }
                }
            }
            if (newStreams.Count == 0)
                return;
            for (int k = 0; k < newStreams.Count; ++k) {
                xrefObj.Add(newStreams[k]);
                PRIndirectReference refi = (PRIndirectReference)newRefs[k];
                refi.SetNumber(xrefObj.Count - 1, 0);
            }
        }
                

        public void SetPageContentTest01()  {
            String outPdf = DestFolder + "out1.pdf";
            PdfReader reader =
                new PdfReader(TestResourceUtils.GetResourceAsStream(TestResourcesPath, "in.pdf"));
            PdfStamper stamper = new PdfStamper(reader, new FileStream(outPdf, FileMode.Create));
            reader.EliminateSharedStreams();
            int total = reader.NumberOfPages + 1;
            for (int i = 1; i < total; i++) {
                byte[] bb = reader.GetPageContent(i);
                reader.SetPageContent(i, bb);
            }
            stamper.Close();

            Assert.Null(new CompareTool().CompareByContent(outPdf, TestResourceUtils.GetResourceAsTempFile(TestResourcesPath, "cmp_out1.pdf"), DestFolder, "diff_"));
        }