Created
March 19, 2010 05:40
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| public IEnumerable<Activity> ExecuteQuery(String query) | |
| { | |
| return query.Split(Environment.NewLine.ToCharArray()) | |
| .Select(s => "(?<method>where|select|orderby|take|skip): *(?<body>.+?)(?: params: *(?<params>.+))?$".RegexMatch(s)) | |
| .Select(m => new | |
| { | |
| Method = m.Groups["method"].Value.ToLower(), | |
| Body = m.Groups["body"].Value, | |
| Parameters = m.Groups["params"].Value.Split(',').Select(s => s.Trim(' ')).ToArray() | |
| }) | |
| .ZipWith(Make.Repeat(this.DataCache.AsQueryable()), (_, q) => | |
| { | |
| switch (_.Method) | |
| { | |
| case "where": | |
| return q.Where(_.Body, _.Parameters); | |
| case "select": | |
| return q.Select(_.Body, _.Parameters); | |
| case "orderby": | |
| return q.OrderBy(_.Body, _.Parameters); | |
| case "take": | |
| return q.Take(_.Body, _.Parameters); | |
| case "skip": | |
| return q.Skip(_.Body, _.Parameters); | |
| default: | |
| throw new ArgumentException("Invalid method: " + _.Method); | |
| } | |
| }) | |
| .First() | |
| .Cast<Activity>() | |
| .AsEnumerable(); | |
| } |
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