mcs/class/System.ComponentModel.DataAnnotations/System.ComponentModel.DataAnnotations/ControlParameters.cs

   1 //
   2 // ControlParameters.cs
   3 //
   4 // Authors:
   5 //      Marek Safar  <marek.safar@gmail.com>
   6 //
   7 // Copyright (C) 2013 Xamarin Inc (http://www.xamarin.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29
  30 using System.Collections;
  31 using System.Collections.Generic;
  32 using System.Linq;
  33
  34 namespace System.ComponentModel.DataAnnotations
  35 {
  36         sealed class ControlParameters : IEquatable<ControlParameters>
  37         {
  38                 Dictionary<string, object> dictionary;
  39                 readonly object[] parameters;
  40
  41                 public ControlParameters (object[] parameters)
  42                 {
  43                         this.parameters = parameters;
  44                 }
  45
  46                 public Dictionary<string, object> Dictionary {
  47                         get {
  48                                 return dictionary ?? (dictionary = CreateDictionary ());
  49                         }
  50                 }
  51
  52                 public bool Equals (ControlParameters other)
  53                 {
  54                         if (parameters == null || other.parameters == null)
  55                                 return ReferenceEquals (parameters, other.parameters);
  56
  57                         if (parameters.Length != other.parameters.Length)
  58                                 return false;
  59
  60                         try {
  61                                 return Dictionary.OrderBy (l => l.Key).SequenceEqual (other.Dictionary.OrderBy (l => l.Key));
  62                         } catch (InvalidOperationException) {
  63                                 return false;
  64                         }
  65                 }
  66
  67                 Dictionary<string, object> CreateDictionary ()
  68                 {
  69                         if (parameters == null || parameters.Length == 0) {
  70                                 return new Dictionary<string, object> (0);
  71                         }
  72
  73                         if (parameters.Length % 2 != 0)
  74                                 throw new InvalidOperationException ();
  75
  76                         var dict = new Dictionary<string, object> ();
  77                         for (int i = 0; i < parameters.Length; ) {
  78                                 var key = parameters [i++] as string;
  79                                 if (key == null)
  80                                         throw new InvalidOperationException ();
  81
  82                                 try {
  83                                         dict.Add (key, parameters[i++]);
  84                                 } catch (System.ArgumentException) {
  85                                         throw new InvalidOperationException ();
  86                                 }
  87                         }
  88
  89                         return dict;
  90                 }
  91         }
  92 }