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

        protected internal PdfObject ReadSingleObject(int k) {
            strings.Clear();
            int k2 = k * 2;
            int pos = xref[k2];
            if (pos < 0)
                return null;
            if (xref[k2 + 1] > 0)
                pos = objStmToOffset[xref[k2 + 1]];
            if (pos == 0)
                return null;
            tokens.Seek(pos);
            tokens.NextValidToken();
            if (tokens.TokenType != PRTokeniser.TK_NUMBER)
                tokens.ThrowError("Invalid object number.");
            objNum = tokens.IntValue;
            tokens.NextValidToken();
            if (tokens.TokenType != PRTokeniser.TK_NUMBER)
                tokens.ThrowError("Invalid generation number.");
            objGen = tokens.IntValue;
            tokens.NextValidToken();
            if (!tokens.StringValue.Equals("obj"))
                tokens.ThrowError("Token 'obj' expected.");
            PdfObject obj;
            try {
                obj = ReadPRObject();
                for (int j = 0; j < strings.Count; ++j) {
                    PdfString str = (PdfString)strings[j];
                    str.Decrypt(this);
                }
                if (obj.IsStream()) {
                    CheckPRStreamLength((PRStream)obj);
                }
            }
            catch {
                obj = null;
            }
            if (xref[k2 + 1] > 0) {
                obj = ReadOneObjStm((PRStream)obj, xref[k2]);
            }
            xrefObj[k] = obj;
            return obj;
        }