mcs/class/System/System.ComponentModel/LookupBindingPropertiesAttribute.cs

   1 //
   2 // System.Diagnostics.LookupBindingPropertiesAttribute.cs
   3 //
   4 // Authors:
   5 //   Rolf Bjarne Kvinge  (RKvinge@novell.com)
   6 //
   7 // (C) 2002
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System;
  32
  33 namespace System.ComponentModel
  34 {
  35         [AttributeUsage(AttributeTargets.Class)]
  36         public sealed class LookupBindingPropertiesAttribute : Attribute
  37         {
  38                 private string data_source;
  39                 private string display_member;
  40                 private string value_member;
  41                 private string lookup_member;
  42
  43                 public static readonly LookupBindingPropertiesAttribute Default;
  44
  45                 static LookupBindingPropertiesAttribute()
  46                 {
  47                         Default = new LookupBindingPropertiesAttribute ();
  48                 }
  49
  50                 public LookupBindingPropertiesAttribute(string dataSource, string displayMember, string valueMember, string lookupMember)
  51                 {
  52                         data_source = dataSource;
  53                         display_member = displayMember;
  54                         value_member = valueMember;
  55                         lookup_member = lookupMember;
  56                 }
  57
  58                 public LookupBindingPropertiesAttribute()
  59                 {
  60                 }
  61
  62                 public override int GetHashCode()
  63                 {
  64                         return  (data_source != null ? data_source.GetHashCode () : 1) << 24 +
  65                                 (display_member != null ? display_member.GetHashCode () : 1) << 16 +
  66                                 (lookup_member != null ? lookup_member.GetHashCode () : 1) << 8 +
  67                                 (value_member != null ? value_member.GetHashCode () : 1);
  68                 }
  69
  70                 public override bool Equals(object obj)
  71                 {
  72                         LookupBindingPropertiesAttribute other = obj as LookupBindingPropertiesAttribute;
  73
  74                         if (other == null)
  75                                 return false;
  76
  77                         if (data_source != other.data_source || display_member != other.display_member)
  78                                 return false;
  79
  80                         if (value_member != other.value_member || lookup_member != other.lookup_member)
  81                                 return false;
  82
  83                         return true;
  84                 }
  85
  86                 public string DataSource {
  87                         get {
  88                                 return data_source;
  89                         }
  90                 }
  91
  92                 public string DisplayMember {
  93                         get     {
  94                                 return display_member;
  95                         }
  96                 }
  97
  98                 public string LookupMember {
  99                         get     {
 100                                 return lookup_member;
 101                         }
 102                 }
 103
 104                 public string ValueMember {
 105                         get     {
 106                                 return value_member;
 107                         }
 108                 }
 109
 110         }
 111 }