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

        public static PdfObject GetPdfObjectRelease(PdfObject obj) {
            PdfObject obj2 = GetPdfObject(obj);
            ReleaseLastXrefPartial(obj);
            return obj2;
        }

        private static ArrayList BookmarkDepth(PdfReader reader, PdfDictionary outline, IntHashtable pages)
        {
            ArrayList list = new ArrayList();

            while (outline != null)
            {
                Hashtable map   = new Hashtable();
                PdfString title = (PdfString)PdfReader.GetPdfObjectRelease(outline.Get(PdfName.TITLE));
                map["Title"] = title.ToUnicodeString();
                PdfArray color = (PdfArray)PdfReader.GetPdfObjectRelease(outline.Get(PdfName.C));
                if (color != null && color.Size == 3)
                {
                    ByteBuffer outp = new ByteBuffer();
                    outp.Append(color.GetAsNumber(0).FloatValue).Append(' ');
                    outp.Append(color.GetAsNumber(1).FloatValue).Append(' ');
                    outp.Append(color.GetAsNumber(2).FloatValue);
                    map["Color"] = PdfEncodings.ConvertToString(outp.ToByteArray(), null);
                }
                PdfNumber style = (PdfNumber)PdfReader.GetPdfObjectRelease(outline.Get(PdfName.F));
                if (style != null)
                {
                    int    f = style.IntValue;
                    String s = "";
                    if ((f & 1) != 0)
                    {
                        s += "italic ";
                    }
                    if ((f & 2) != 0)
                    {
                        s += "bold ";
                    }
                    s = s.Trim();
                    if (s.Length != 0)
                    {
                        map["Style"] = s;
                    }
                }
                PdfNumber count = (PdfNumber)PdfReader.GetPdfObjectRelease(outline.Get(PdfName.COUNT));
                if (count != null && count.IntValue < 0)
                {
                    map["Open"] = "false";
                }
                try {
                    PdfObject dest = PdfReader.GetPdfObjectRelease(outline.Get(PdfName.DEST));
                    if (dest != null)
                    {
                        MapGotoBookmark(map, dest, pages); //changed by ujihara 2004-06-13
                    }
                    else
                    {
                        PdfDictionary action = (PdfDictionary)PdfReader.GetPdfObjectRelease(outline.Get(PdfName.A));
                        if (action != null)
                        {
                            if (PdfName.GOTO.Equals(PdfReader.GetPdfObjectRelease(action.Get(PdfName.S))))
                            {
                                dest = PdfReader.GetPdfObjectRelease(action.Get(PdfName.D));
                                if (dest != null)
                                {
                                    MapGotoBookmark(map, dest, pages);
                                }
                            }
                            else if (PdfName.URI.Equals(PdfReader.GetPdfObjectRelease(action.Get(PdfName.S))))
                            {
                                map["Action"] = "URI";
                                map["URI"]    = ((PdfString)PdfReader.GetPdfObjectRelease(action.Get(PdfName.URI))).ToUnicodeString();
                            }
                            else if (PdfName.GOTOR.Equals(PdfReader.GetPdfObjectRelease(action.Get(PdfName.S))))
                            {
                                dest = PdfReader.GetPdfObjectRelease(action.Get(PdfName.D));
                                if (dest != null)
                                {
                                    if (dest.IsString())
                                    {
                                        map["Named"] = dest.ToString();
                                    }
                                    else if (dest.IsName())
                                    {
                                        map["NamedN"] = PdfName.DecodeName(dest.ToString());
                                    }
                                    else if (dest.IsArray())
                                    {
                                        PdfArray      arr = (PdfArray)dest;
                                        StringBuilder s   = new StringBuilder();
                                        s.Append(arr[0].ToString());
                                        s.Append(' ').Append(arr[1].ToString());
                                        for (int k = 2; k < arr.Size; ++k)
                                        {
                                            s.Append(' ').Append(arr[k].ToString());
                                        }
                                        map["Page"] = s.ToString();
                                    }
                                }
                                map["Action"] = "GoToR";
                                PdfObject file = PdfReader.GetPdfObjectRelease(action.Get(PdfName.F));
                                if (file != null)
                                {
                                    if (file.IsString())
                                    {
                                        map["File"] = ((PdfString)file).ToUnicodeString();
                                    }
                                    else if (file.IsDictionary())
                                    {
                                        file = PdfReader.GetPdfObject(((PdfDictionary)file).Get(PdfName.F));
                                        if (file.IsString())
                                        {
                                            map["File"] = ((PdfString)file).ToUnicodeString();
                                        }
                                    }
                                }
                                PdfObject newWindow = PdfReader.GetPdfObjectRelease(action.Get(PdfName.NEWWINDOW));
                                if (newWindow != null)
                                {
                                    map["NewWindow"] = newWindow.ToString();
                                }
                            }
                            else if (PdfName.LAUNCH.Equals(PdfReader.GetPdfObjectRelease(action.Get(PdfName.S))))
                            {
                                map["Action"] = "Launch";
                                PdfObject file = PdfReader.GetPdfObjectRelease(action.Get(PdfName.F));
                                if (file == null)
                                {
                                    file = PdfReader.GetPdfObjectRelease(action.Get(PdfName.WIN));
                                }
                                if (file != null)
                                {
                                    if (file.IsString())
                                    {
                                        map["File"] = ((PdfString)file).ToUnicodeString();
                                    }
                                    else if (file.IsDictionary())
                                    {
                                        file = PdfReader.GetPdfObjectRelease(((PdfDictionary)file).Get(PdfName.F));
                                        if (file.IsString())
                                        {
                                            map["File"] = ((PdfString)file).ToUnicodeString();
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
                catch  {
                    //empty on purpose
                }
                PdfDictionary first = (PdfDictionary)PdfReader.GetPdfObjectRelease(outline.Get(PdfName.FIRST));
                if (first != null)
                {
                    map["Kids"] = BookmarkDepth(reader, first, pages);
                }
                list.Add(map);
                outline = (PdfDictionary)PdfReader.GetPdfObjectRelease(outline.Get(PdfName.NEXT));
            }
            return(list);
        }