wvdotnet/wvmoniker.cs

   1 using System;
   2 using System.Collections.Generic;
   3 using Wv;
   4 using Wv.Extensions;
   5
   6 namespace Wv
   7 {
   8     public class WvMoniker<T>
   9     {
  10         static List<WvMoniker<T>> registry = new List<WvMoniker<T>>();
  11         string prefix;
  12         Func<string,object,T> func;
  13
  14         public static WvMoniker<T>
  15             register(string prefix, Func<string,object,T> func)
  16         {
  17             return new WvMoniker<T>(prefix, func);
  18         }
  19
  20         public WvMoniker(string prefix, Func<string,object,T> func)
  21         {
  22             this.prefix = prefix;
  23             this.func = func;
  24             registry.Add(this);
  25         }
  26
  27         // probably nobody will ever call this
  28         public void unregister()
  29         {
  30             registry.Remove(this);
  31         }
  32
  33         public static WvMoniker<T> find(string prefix)
  34         {
  35             foreach (WvMoniker<T> m in registry)
  36                 if (m.prefix == prefix)
  37                     return m;
  38             return null;
  39         }
  40
  41         public static T create(string moniker, object o)
  42         {
  43             int pos = moniker.IndexOf(':');
  44             string prefix, suffix;
  45             if (pos >= 0)
  46             {
  47                 prefix = moniker.Substring(0, pos);
  48                 suffix = moniker.Substring(pos+1);
  49             }
  50             else
  51             {
  52                 prefix = moniker;
  53                 suffix = "";
  54             }
  55
  56             WvMoniker<T> m = find(prefix);
  57             if (m == null)
  58                 return default(T);
  59             else
  60                 return m.func(suffix, o);
  61         }
  62
  63         public static T create(string moniker)
  64         {
  65             return create(moniker, null);
  66         }
  67     }
  68 }