2 // System.Web.UI.FilterableAttribute
5 // Sanjay Gupta (gsanjay@novell.com)
7 // (C) 2004-2010 Novell, Inc. (http://www.novell.com)
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:
19 // The above copyright notice and this permission notice shall be
20 // included in all copies or substantial portions of the Software.
22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 using System.ComponentModel;
33 namespace System.Web.UI {
34 [AttributeUsage (AttributeTargets.Class | AttributeTargets.Property, AllowMultiple = false, Inherited = true)]
35 public sealed class FilterableAttribute : Attribute
39 public FilterableAttribute (bool filterable)
41 this.filterable = filterable;
44 public static readonly FilterableAttribute Default = new FilterableAttribute (true);
46 public static readonly FilterableAttribute No = new FilterableAttribute (false);
48 public static readonly FilterableAttribute Yes = new FilterableAttribute (true);
50 public bool Filterable {
51 get { return filterable; }
54 public override bool Equals (object obj)
56 if (obj != null && obj is FilterableAttribute) {
57 FilterableAttribute fa = (FilterableAttribute) obj;
58 return (this.filterable == fa.filterable);
63 public override int GetHashCode ()
65 return this.filterable.GetHashCode ();
68 public override bool IsDefaultAttribute ()
70 return Equals (Default);
73 public static bool IsObjectFilterable (object obj)
75 return IsTypeFilterable (obj.GetType ());
78 public static bool IsPropertyFilterable (PropertyDescriptor propDesc)
80 System.ComponentModel.AttributeCollection attributes = propDesc.Attributes;
81 if (attributes.Count != 0) {
82 foreach (Attribute attrib in attributes)
83 if (attrib is FilterableAttribute)
89 public static bool IsTypeFilterable (Type type)
91 Object [] attributes = type.GetCustomAttributes (typeof (FilterableAttribute), false);
92 if (attributes.Length != 0) {
93 foreach (Attribute attrib in attributes)
94 if (attrib is FilterableAttribute)