Esempio n. 1
0
            public static SqlTemplate Parse(string input)
            {
                if (input == null)
                {
                    throw new ArgumentNullException(nameof(input));
                }

                var reader = new CharSequenceReader(input);

                bool parsingParameter = false;

                var template = new SqlTemplate();

                template.RawString = input;

                var ls = new List <SqlTemplateSegment>();

                var segmentBuilder = new StringBuilder();

                while (reader.HasNext())
                {
                    reader.Next();

                    if (reader.Current() == '@' && !parsingParameter)
                    {
                        if (segmentBuilder.Length != 0)
                        {
                            ls.Add(new SqlTemplateSegment(segmentBuilder.ToString(), false));

                            segmentBuilder.Clear();
                        }

                        parsingParameter = true;
                    }
                    else if (parsingParameter && (reader.Current() == ' ' || reader.Current() == '\r' || reader.Current() == '\n' || reader.Current() == '\t'))
                    {
                        bool followIn = ls.Count == 0 ? false :
                                        ls[ls.Count - 1].Value.ToLower().Trim().EndsWith(" in") ? true :
                                        false;

                        ls.Add(new SqlTemplateSegment(segmentBuilder.ToString(), true, followIn));

                        segmentBuilder.Clear();

                        parsingParameter = false;
                    }
                    else
                    {
                        segmentBuilder.Append(reader.Current());
                    }
                }

                if (segmentBuilder.Length != 0)
                {
                    if (parsingParameter)
                    {
                        bool followIn = ls.Count == 0 ? false :
                                        ls[ls.Count - 1].Value.ToLower().Trim().EndsWith(" in") ? true :
                                        false;

                        ls.Add(new SqlTemplateSegment(segmentBuilder.ToString(), true, followIn));
                    }
                    else
                    {
                        ls.Add(new SqlTemplateSegment(segmentBuilder.ToString(), false));
                    }
                }

                template.Segments = ls.ToArray();

                return(template);
            }