class/System.Design/System.ComponentModel.Design.Serialization/EnumCodeDomSerializer.cs

   1 //
   2 // System.ComponentModel.Design.Serialization.EnumCodeDomSerializer
   3 //
   4 // Authors:
   5 //        Ivan N. Zlatev (contact i-nZ.net)
   6 //
   7 // (C) 2007 Ivan N. Zlatev
   8
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 #if NET_2_0
  31
  32 using System;
  33 using System.ComponentModel;
  34 using System.ComponentModel.Design;
  35
  36 using System.CodeDom;
  37
  38 namespace System.ComponentModel.Design.Serialization
  39 {
  40         internal class EnumCodeDomSerializer : CodeDomSerializer
  41         {
  42
  43                 public EnumCodeDomSerializer ()
  44                 {
  45                 }
  46
  47                 public override object Serialize (IDesignerSerializationManager manager, object value)
  48                 {
  49                         if (manager == null)
  50                                 throw new ArgumentNullException ("manager");
  51                         if (value == null)
  52                                 throw new ArgumentNullException ("value");
  53
  54                         Enum[] enums = null;
  55                         TypeConverter converter = TypeDescriptor.GetConverter (value);
  56                         if (converter.CanConvertTo (typeof (Enum[])))
  57                                 enums = (Enum[]) converter.ConvertTo (value, typeof (Enum[]));
  58                         else
  59                                 enums = new Enum[] { (Enum) value };
  60                         CodeExpression left = null;
  61                         CodeExpression right = null;
  62                         foreach (Enum e in enums) {
  63                                 right = GetEnumExpression (e);
  64                                 if (left == null) // just the first time
  65                                         left = right;
  66                                 else
  67                                         left = new CodeBinaryOperatorExpression (left, CodeBinaryOperatorType.BitwiseOr, right);
  68                         }
  69
  70                         return left;
  71                 }
  72
  73                 private CodeExpression GetEnumExpression (Enum e)
  74                 {
  75                         TypeConverter converter = TypeDescriptor.GetConverter (e);
  76                         if (converter != null && converter.CanConvertTo (typeof (string)))
  77                                 return new CodeFieldReferenceExpression (new CodeTypeReferenceExpression (e.GetType().FullName),
  78                                                                                                                  (string) converter.ConvertTo (e, typeof (string)));
  79                         else
  80                                 return null;
  81                 }
  82         }
  83 }
  84 #endif