2 // System.UriTypeConverter class
5 // Sebastien Pouliot <sebastien@ximian.com>
7 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 using System.ComponentModel;
32 using System.ComponentModel.Design.Serialization;
33 using System.Globalization;
34 using System.Reflection;
38 public class UriTypeConverter : TypeConverter {
40 public UriTypeConverter ()
45 private bool CanConvert (Type type)
47 if (type == typeof (string))
49 if (type == typeof (Uri))
51 return (type == typeof (InstanceDescriptor));
54 public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType)
56 if (sourceType == null)
57 throw new ArgumentNullException ("sourceType");
59 return CanConvert (sourceType);
62 public override bool CanConvertTo (ITypeDescriptorContext context, Type destinationType)
64 if (destinationType == null)
67 return CanConvert (destinationType);
70 public override object ConvertFrom (ITypeDescriptorContext context, CultureInfo culture, object value)
73 throw new ArgumentNullException ("value");
75 if (!CanConvertTo (context, value.GetType ()))
76 throw new NotSupportedException (Locale.GetText ("Cannot convert from value."));
81 string s = (value as string);
85 InstanceDescriptor id = (value as InstanceDescriptor);
90 return base.ConvertFrom (context, culture, value);
93 public override object ConvertTo (ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
95 if (!CanConvertTo (context, destinationType))
96 throw new NotSupportedException (Locale.GetText ("Cannot convert to destination type."));
98 Uri uri = (value as Uri);
100 if (destinationType == typeof (string))
101 return uri.AbsoluteUri;
102 if (destinationType == typeof (Uri))
104 if (destinationType == typeof (InstanceDescriptor)) {
105 ConstructorInfo ci = typeof (Uri).GetConstructor (new Type [1] { typeof (string) });
106 return new InstanceDescriptor (ci , new object [] { uri.AbsoluteUri });
110 return base.ConvertTo (context, culture, value, destinationType);
113 public override bool IsValid (ITypeDescriptorContext context, object value)
118 // LAMESPEC: docs says that a string is valid only if we can create an URI
119 // from it. However all strings seems to be accepted (see unit tests)
120 return ((value is string) || (value is Uri));