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  1.     using System;
  2.     using System.Collections.Generic;
  3.     using System.Linq;
  4.     using System.Reflection;
  5.     using System.Text.RegularExpressions;
  6.  
  7.     namespace AClient
  8.     {
  9.         public class Materiel
  10.         {
  11.             public string A { get; set; }
  12.             public int B { get; set; }
  13.             public DateTime? C { get; set; }
  14.             public string D { get; set; }
  15.             public Nested E { get; set; }
  16.         }
  17.  
  18.         public struct Nested
  19.         {
  20.             public string Data { get; set; }
  21.             public override string ToString() { return string.Format("Extra: {0}", Data); }
  22.         }
  23.  
  24.  
  25.         public static class FullText
  26.         {
  27.             public class PropMatched<T> { public PropertyInfo Property; public T Item; }
  28.  
  29.             public static IEnumerable<PropMatched<T> > ByProperty<T>(this IEnumerable<T> items, string substr)
  30.             {
  31.                 return items.ByProperty(new Regex(Regex.Escape(substr), RegexOptions.IgnoreCase));
  32.             }
  33.  
  34.             public static IEnumerable<PropMatched<T> > ByProperty<T>(this IEnumerable<T> items, Regex pattern)
  35.             {
  36.                 return items.Select(i => i.MatchingProperties(pattern)).Where(m => null != m);
  37.             }
  38.  
  39.             public static IEnumerable<T> Search<T>(this IEnumerable<T> items, string substr)
  40.             {
  41.                 return items.Search(new Regex(Regex.Escape(substr), RegexOptions.IgnoreCase));
  42.             }
  43.  
  44.             public static IEnumerable<T> Search<T>(this IEnumerable<T> items, Regex pattern)
  45.             {
  46.                 return items.Where(i => null != i.MatchingProperties(pattern));
  47.             }
  48.  
  49.             public static PropMatched<T> MatchingProperties<T>(this T item, Regex pattern)
  50.             {
  51.                 if (null == pattern || null == item) return null;
  52.  
  53.                 var properties = item.GetType().GetProperties(BindingFlags.Public | BindingFlags.FlattenHierarchy | BindingFlags.Instance);
  54.                 var matches = from   prop in properties 
  55.                               let    val = prop.GetGetMethod(true).Invoke(item, new object[]{}) 
  56.                               where  pattern.IsMatch((val??"").ToString()) 
  57.                               select prop;
  58.  
  59.                 var found = matches.FirstOrDefault();
  60.                 return found == null ? null : new PropMatched<T> {Item = item, Property = found};
  61.             }
  62.         }
  63.  
  64.         class Client
  65.         {
  66.             private static readonly IEnumerable<Materiel> Database = new List<Materiel>
  67.                 {
  68.                     new Materiel {
  69.                             A = "Hello", B = 1, C = null, D = "World",
  70.                             E = new Nested {Data = "Attachment"}
  71.                         },
  72.                     new Materiel {
  73.                             A = "Transfigured", B = 2, C = null, D = "Nights",
  74.                             E = new Nested {Data = "Schoenberg"}
  75.                         },
  76.                     new Materiel {
  77.                             A = "Moby", B = 3, C = null, D = "Dick",
  78.                             E = new Nested {Data = "Biographic"}
  79.                         },
  80.                     new Materiel {
  81.                             A = "Prick", B = 4, C = DateTime.Today, D = "World",
  82.                             E = new Nested {Data = "Attachment"}
  83.                         },
  84.                     new Materiel {
  85.                             A = "Oh Noes", B = 2, C = null, D = "Nights",
  86.                             E = new Nested {Data = "Schoenberg"}
  87.                         },
  88.                 };
  89.  
  90.  
  91.             static void Main()
  92.             {
  93.                 foreach (var pattern in new[]{ "World" , "dick", "Dick", "ick", "2012", "Attach" })
  94.                     Console.WriteLine("{0} records match '{1}'", Database.Search(pattern).Count(), pattern);
  95.  
  96.                 // regex sample:
  97.                 var regex = new Regex(@"N\w+s", RegexOptions.IgnoreCase);
  98.  
  99.                 Console.WriteLine(@"{0} records match regular expression 'N\w+s'", Database.Search(regex).Count());
  100.  
  101.                 // with context info:
  102.                 foreach (var contextMatch in Database.ByProperty(regex))
  103.                 {
  104.                     Console.WriteLine("1 match of regex in propery {0} with value '{1}'",
  105.                         contextMatch.Property.Name, contextMatch.Property.GetGetMethod().Invoke(contextMatch.Item, new object[0]));
  106.  
  107.                 }
  108.             }
  109.         }
  110.     }
  111.  
  112.  
  113.  
Success #stdin #stdout 0.09s 37680KB
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Standard input is empty
stdout
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2 records match 'World'
1 records match 'dick'
1 records match 'Dick'
2 records match 'ick'
1 records match '2012'
2 records match 'Attach'
2 records match regular expression 'N\w+s'
1 match of regex in propery D with value 'Nights'
1 match of regex in propery A with value 'Oh Noes'
https://ideone.com/UWgQe
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
secret

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