mcs/class/WindowsBase/System.Windows.Markup/ValueSerializer.cs

   1 #if !NET_4_0
   2 // Permission is hereby granted, free of charge, to any person obtaining
   3 // a copy of this software and associated documentation files (the
   4 // "Software"), to deal in the Software without restriction, including
   5 // without limitation the rights to use, copy, modify, merge, publish,
   6 // distribute, sublicense, and/or sell copies of the Software, and to
   7 // permit persons to whom the Software is furnished to do so, subject to
   8 // the following conditions:
   9 //
  10 // The above copyright notice and this permission notice shall be
  11 // included in all copies or substantial portions of the Software.
  12 //
  13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  14 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  15 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  16 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  17 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  18 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  19 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20 //
  21 // Copyright (c) 2007 Novell, Inc. (http://www.novell.com)
  22 //
  23 // Authors:
  24 //      Chris Toshok (toshok@ximian.com)
  25 //
  26
  27 using System;
  28 using System.Collections.Generic;
  29 using System.ComponentModel;
  30 using System.Windows.Converters;
  31
  32 namespace System.Windows.Markup {
  33
  34         // I don't like the idea of hardcoding the types in here, but
  35         // I'm not sure what else to do about it..
  36         class DefaultValueSerializerContext : IValueSerializerContext
  37         {
  38                 public ValueSerializer GetValueSerializerFor (PropertyDescriptor descriptor)
  39                 {
  40                         Attribute attribute = (Attribute)descriptor.Attributes[typeof (ValueSerializerAttribute)];
  41                         if (attribute != null)
  42                                 return (ValueSerializer)Activator.CreateInstance (((ValueSerializerAttribute)attribute).ValueSerializerType);
  43
  44                         return GetValueSerializerFor (descriptor.PropertyType);
  45                 }
  46
  47                 public ValueSerializer GetValueSerializerFor (Type type)
  48                 {
  49                         Attribute attribute = (Attribute)TypeDescriptor.GetAttributes (type)[typeof (ValueSerializerAttribute)];
  50                         if (attribute != null)
  51                                 return (ValueSerializer)Activator.CreateInstance (((ValueSerializerAttribute)attribute).ValueSerializerType);
  52
  53                         if (typeof (DateTime).IsAssignableFrom (type))
  54                                 return new DateTimeValueSerializer();
  55                         else if (typeof (Int32Rect).IsAssignableFrom (type))
  56                                 return new Int32RectValueSerializer ();
  57                         else if (typeof (Point).IsAssignableFrom (type))
  58                                 return new PointValueSerializer ();
  59                         else if (typeof (Rect).IsAssignableFrom (type))
  60                                 return new RectValueSerializer ();
  61                         else if (typeof (Size).IsAssignableFrom (type))
  62                                 return new SizeValueSerializer ();
  63                         else if (typeof (Vector).IsAssignableFrom (type))
  64                                 return new VectorValueSerializer ();
  65                         else
  66                                 return null;
  67                 }
  68
  69                 public void OnComponentChanged ()
  70                 {
  71                 }
  72
  73                 public bool OnComponentChanging ()
  74                 {
  75                         return false;
  76                 }
  77
  78                 public IContainer Container {
  79                         get { return null; }
  80                 }
  81
  82                 public object Instance {
  83                         get { return null; }
  84                 }
  85
  86                 public PropertyDescriptor PropertyDescriptor {
  87                         get { return null; }
  88                 }
  89
  90                 public object GetService (Type serviceType)
  91                 {
  92                         return null;
  93                 }
  94         }
  95
  96         public abstract class ValueSerializer
  97         {
  98                 protected ValueSerializer ()
  99                 {
 100                 }
 101
 102                 public virtual bool CanConvertFromString (string value, IValueSerializerContext context)
 103                 {
 104                         throw new NotImplementedException ();
 105                 }
 106
 107                 public virtual bool CanConvertToString (object value, IValueSerializerContext context)
 108                 {
 109                         throw new NotImplementedException ();
 110                 }
 111
 112                 public virtual object ConvertFromString (string value, IValueSerializerContext context)
 113                 {
 114                         throw new NotImplementedException ();
 115                 }
 116
 117                 public virtual string ConvertToString (object value, IValueSerializerContext context)
 118                 {
 119                         throw new NotImplementedException ();
 120                 }
 121
 122                 protected Exception GetConvertFromException (object value)
 123                 {
 124                         throw new NotImplementedException ();
 125                 }
 126
 127                 protected Exception GetConvertToException (object value, Type destinationType)
 128                 {
 129                         throw new NotImplementedException ();
 130                 }
 131
 132                 public virtual IEnumerable<Type> TypeReferences (object value, IValueSerializerContext context)
 133                 {
 134                         throw new NotImplementedException ();
 135                 }
 136
 137                 public static ValueSerializer GetSerializerFor (PropertyDescriptor descriptor)
 138                 {
 139                         DefaultValueSerializerContext defaultContext = new DefaultValueSerializerContext();
 140                         return defaultContext.GetValueSerializerFor (descriptor);
 141                 }
 142
 143                 public static ValueSerializer GetSerializerFor (Type type)
 144                 {
 145                         DefaultValueSerializerContext defaultContext = new DefaultValueSerializerContext();
 146                         return defaultContext.GetValueSerializerFor (type);
 147                 }
 148
 149                 public static ValueSerializer GetSerializerFor (PropertyDescriptor descriptor, IValueSerializerContext context)
 150                 {
 151                         ValueSerializer s = context.GetValueSerializerFor (descriptor);
 152                         if (s == null) {
 153                                 DefaultValueSerializerContext defaultContext = new DefaultValueSerializerContext();
 154                                 s = defaultContext.GetValueSerializerFor (descriptor);
 155                         }
 156                         return s;
 157                 }
 158
 159                 public static ValueSerializer GetSerializerFor (Type type, IValueSerializerContext context)
 160                 {
 161                         ValueSerializer s = context.GetValueSerializerFor (type);
 162                         if (s == null) {
 163                                 DefaultValueSerializerContext defaultContext = new DefaultValueSerializerContext();
 164                                 s = defaultContext.GetValueSerializerFor (type);
 165                         }
 166                         return s;
 167                 }
 168         }
 169
 170 }
 171 #endif