In .:
[mono.git] / 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
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
36         [AttributeUsage(AttributeTargets.All)]
37         public sealed class ExtenderProvidedPropertyAttribute : Attribute
38         {
39                 private PropertyDescriptor extender;
40                 private IExtenderProvider extenderProvider;
41                 private Type receiver;
42
43                 public ExtenderProvidedPropertyAttribute()
44                 {
45                 }
46
47                 // Call this method to create a ExtenderProvidedPropertyAttribute and set it's values
48                 internal static ExtenderProvidedPropertyAttribute CreateAttribute (PropertyDescriptor extenderProperty, IExtenderProvider provider, Type receiverType)
49                 {
50                         ExtenderProvidedPropertyAttribute NewAttribute = new ExtenderProvidedPropertyAttribute();
51                         NewAttribute.extender = extenderProperty;
52                         NewAttribute.receiver = receiverType;
53                         NewAttribute.extenderProvider = provider;
54                         return NewAttribute; 
55                 }
56
57                 public PropertyDescriptor ExtenderProperty {
58                         get {
59                                 return extender;
60                         }
61                 }
62
63                 public IExtenderProvider Provider {
64                         get {
65                                 return extenderProvider;
66                         }
67                 }
68
69                 public Type ReceiverType {
70                         get {
71                                 return receiver;
72                         }
73                 }
74
75                 public override bool IsDefaultAttribute()
76                 {
77                         // FIXME correct implementation??
78                         return (extender == null) &&
79                         (extenderProvider == null) &&
80                         (receiver == null);
81                 }
82
83                 public override bool Equals (object obj)
84                 {
85                         if (!(obj is ExtenderProvidedPropertyAttribute))
86                                 return false;
87                         if (obj == this)
88                                 return true;
89                         return ((ExtenderProvidedPropertyAttribute) obj).ExtenderProperty.Equals (extender) &&
90                         ((ExtenderProvidedPropertyAttribute) obj).Provider.Equals (extenderProvider) &&
91                         ((ExtenderProvidedPropertyAttribute) obj).ReceiverType.Equals (receiver);
92                 }
93
94                 public override int GetHashCode()
95                 {
96                         return extender.GetHashCode() ^ extenderProvider.GetHashCode() ^ receiver.GetHashCode();
97                 }
98         }
99 }