mcs/class/System/System.ComponentModel/ExtenderProvidedPropertyAttribute.cs

   1 //
   2 // System.ComponentModel.ExtenderProvidedPropertyAttribute.cs
   3 //
   4 // Author:
   5 //   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
   6 //
   7 // (C) 2003 Andreas Nahr
   8 //
   9 \r
  10 using System;
  11 \r
  12 namespace System.ComponentModel
  13 {
  14
  15         [AttributeUsage(AttributeTargets.All)]
  16         public sealed class ExtenderProvidedPropertyAttribute : Attribute
  17         {\r
  18                 private PropertyDescriptor extender;
  19                 private IExtenderProvider extenderProvider;
  20                 private Type receiver;
  21 \r
  22                 public ExtenderProvidedPropertyAttribute()
  23                 {
  24                 }
  25 \r
  26                 // Call this method to create a ExtenderProvidedPropertyAttribute and set it's values
  27                 internal static ExtenderProvidedPropertyAttribute CreateAttribute (PropertyDescriptor extenderProperty, IExtenderProvider provider, Type receiverType)
  28                 {
  29                         ExtenderProvidedPropertyAttribute NewAttribute = new ExtenderProvidedPropertyAttribute();
  30                         NewAttribute.extender = extenderProperty;
  31                         NewAttribute.receiver = receiverType;
  32                         NewAttribute.extenderProvider = provider;
  33                         return NewAttribute;
  34                 }
  35
  36                 public PropertyDescriptor ExtenderProperty {
  37                         get {
  38                                 return extender;
  39                         }
  40                 }
  41 \r
  42                 public IExtenderProvider Provider {
  43                         get {
  44                                 return extenderProvider;
  45                         }
  46                 }
  47 \r
  48                 public Type ReceiverType {
  49                         get {
  50                                 return receiver;
  51                         }
  52                 }
  53 \r
  54                 public override bool IsDefaultAttribute()
  55                 {
  56                         // FIXME correct implementation??
  57                         return (extender == null) &&
  58                         (extenderProvider == null) &&
  59                         (receiver == null);
  60                 }
  61 \r
  62                 public override bool Equals (object obj)
  63                 {
  64                         if (!(obj is ExtenderProvidedPropertyAttribute))
  65                                 return false;
  66                         if (obj == this)
  67                                 return true;
  68                         return ((ExtenderProvidedPropertyAttribute) obj).ExtenderProperty.Equals (extender) &&
  69                         ((ExtenderProvidedPropertyAttribute) obj).Provider.Equals (extenderProvider) &&
  70                         ((ExtenderProvidedPropertyAttribute) obj).ReceiverType.Equals (receiver);
  71                 }
  72
  73                 public override int GetHashCode()
  74                 {
  75                         return extender.GetHashCode() ^ extenderProvider.GetHashCode() ^ receiver.GetHashCode();
  76                 }
  77         }
  78 }\r