class/System.Xaml/System.Xaml.Schema/XamlTypeTypeConverter.cs

   1 //
   2 // Copyright (C) 2010 Novell Inc. http://novell.com
   3 //
   4 // Permission is hereby granted, free of charge, to any person obtaining
   5 // a copy of this software and associated documentation files (the
   6 // "Software"), to deal in the Software without restriction, including
   7 // without limitation the rights to use, copy, modify, merge, publish,
   8 // distribute, sublicense, and/or sell copies of the Software, and to
   9 // permit persons to whom the Software is furnished to do so, subject to
  10 // the following conditions:
  11 //
  12 // The above copyright notice and this permission notice shall be
  13 // included in all copies or substantial portions of the Software.
  14 //
  15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  19 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  20 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  21 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22 //
  23 using System;
  24 using System.Collections.Generic;
  25 using System.ComponentModel;
  26 using System.Globalization;
  27
  28 namespace System.Xaml.Schema
  29 {
  30         public class XamlTypeTypeConverter : TypeConverter
  31         {
  32                 public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType)
  33                 {
  34                         return sourceType == typeof (string);
  35                 }
  36
  37                 public override bool CanConvertTo (ITypeDescriptorContext context, Type destinationType)
  38                 {
  39                         return destinationType == typeof (string);
  40                 }
  41
  42                 public override Object ConvertFrom (ITypeDescriptorContext context, CultureInfo culture, Object value)
  43                 {
  44                         throw new NotSupportedException (String.Format ("Conversion from type {0} is not supported", value != null ? value.GetType () : null));
  45                 }
  46
  47                 public override object ConvertTo (ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
  48                 {
  49                         var xt = value as XamlType;
  50                         if (xt != null) {
  51                                 if (destinationType == typeof (string))
  52                                         return xt.UnderlyingType != null ? xt.UnderlyingType.ToString () : xt.ToString ();
  53                                 throw new NotSupportedException (String.Format ("Conversion to type {0} is not supported", destinationType));
  54                         }
  55                         else
  56                                 return base.ConvertTo (context, culture, value, destinationType); // it seems it still handles not-supported types (such as int).
  57                 }
  58         }
  59 }