iTextSharp.text.pdf.PdfStructTreeController.SetReader C# (CSharp) Метод

        protected internal void SetReader(PdfReader reader)
        {
            this.reader = reader;
            fileName = reader.SafeFile.filename;
            if (!openedDocuments.ContainsKey(fileName)) {
            openedDocuments.Add(fileName, false);
            }
            PdfObject obj = reader.Catalog.Get(PdfName.STRUCTTREEROOT);
            obj = GetDirectObject(obj);
            if ((obj == null) || (!obj.IsDictionary()))
            throw new BadPdfFormatException(MessageLocalization.GetComposedMessage("no.structtreeroot.found"));
            structTreeRoot = (PdfDictionary)obj;
            obj = PdfStructTreeController.GetDirectObject(structTreeRoot.Get(PdfName.PARENTTREE));
            if (!obj.IsDictionary())
            throw new BadPdfFormatException(MessageLocalization.GetComposedMessage("the.document.does.not.contain.parenttree"));
            parentTree = (PdfDictionary)obj;
            sourceRoleMap = null;
            sourceClassMap = null;
        }