private static void ParsePdf(byte[] pdf, IPdfParsingStrategy strategy)
        {
            PdfReader reader = new PdfReader(pdf);

            for (int i = 1; i <= reader.NumberOfPages; i++)
            {
                byte[] page = reader.GetPageContent(i);
                if (page != null)
                {
                    PRTokeniser     tokenizer  = new PRTokeniser(page);
                    List <PdfToken> parameters = new List <PdfToken>();
                    while (tokenizer.NextToken())
                    {
                        var token = PdfToken.Create(tokenizer);
                        if (token.IsOperand)
                        {
                            strategy.Execute(new PdfOperation(token, parameters));
                            parameters.Clear();
                        }
                        else
                        {
                            parameters.Add(token);
                        }
                    }
                }
            }
        }
 public PdfOperation(PdfToken operationToken, IEnumerable <PdfToken> arguments)
 {
     Name      = operationToken.Value;
     Arguments = arguments;
 }