class/System/System.ComponentModel/DataObjectAttribute.cs

   1 //
   2 // (C) 2006 Mainsoft Corporation (http://www.mainsoft.com)
   3 //
   4 // Authors:
   5 //      Konstantin Triger <kostat@mainsoft.com>
   6 //
   7 // Permission is hereby granted, free of charge, to any person obtaining
   8 // a copy of this software and associated documentation files (the
   9 // "Software"), to deal in the Software without restriction, including
  10 // without limitation the rights to use, copy, modify, merge, publish,
  11 // distribute, sublicense, and/or sell copies of the Software, and to
  12 // permit persons to whom the Software is furnished to do so, subject to
  13 // the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be
  16 // included in all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  21 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  22 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25 //
  26
  27 #if NET_2_0
  28
  29 using System;
  30 using System.Collections.Generic;
  31 using System.Text;
  32
  33 namespace System.ComponentModel
  34 {
  35         [AttributeUsageAttribute (AttributeTargets.Class)]
  36         public sealed class DataObjectAttribute : Attribute
  37         {
  38                 #region Fields
  39
  40                 public static readonly DataObjectAttribute DataObject;
  41                 public static readonly DataObjectAttribute Default;
  42                 public static readonly DataObjectAttribute NonDataObject;
  43
  44                 readonly bool _isDataObject;
  45
  46                 #endregion
  47
  48                 #region Constructors
  49
  50                 static DataObjectAttribute () {
  51                         DataObject = new DataObjectAttribute (true);
  52                         NonDataObject = new DataObjectAttribute (false);
  53                         Default = NonDataObject;
  54                 }
  55
  56                 public DataObjectAttribute () : this (true) { }
  57                 public DataObjectAttribute (bool isDataObject) {
  58                         _isDataObject = isDataObject;
  59                 }
  60
  61                 #endregion
  62
  63                 #region Properties
  64
  65                 public bool IsDataObject { get { return _isDataObject; } }
  66
  67                 #endregion
  68
  69                 #region Methods
  70
  71                 public override bool Equals (object obj) {
  72                         if (!(obj is DataObjectAttribute))
  73                                 return false;
  74
  75                         return ((DataObjectAttribute) obj).IsDataObject == IsDataObject;
  76                 }
  77                 public override int GetHashCode () {
  78                         return IsDataObject.GetHashCode ();
  79                 }
  80                 public override bool IsDefaultAttribute () {
  81                         return Default.Equals (this);
  82                 }
  83
  84                 #endregion
  85         }
  86 }
  87
  88 #endif