mcs/class/System.Runtime.Serialization/ReferenceSources/CodeInterpreter.cs

   1
   2 namespace System.Runtime.Serialization
   3 {
   4         public class CodeInterpreter
   5         {
   6
   7                 internal static object ConvertValue(object arg, Type source, Type target)
   8                 {
   9                         return InternalConvert(arg, source, target, false);
  10                 }
  11
  12
  13         static bool CanConvert (TypeCode typeCode)
  14         {
  15             switch (typeCode)
  16             {
  17                 case TypeCode.Boolean:
  18                 case TypeCode.Char:
  19                 case TypeCode.SByte:
  20                 case TypeCode.Byte:
  21                 case TypeCode.Int16:
  22                 case TypeCode.UInt16:
  23                 case TypeCode.Int32:
  24                 case TypeCode.UInt32:
  25                 case TypeCode.Int64:
  26                 case TypeCode.UInt64:
  27                 case TypeCode.Single:
  28                 case TypeCode.Double:
  29                                         return true;
  30             }
  31             return false;
  32         }
  33
  34                 static object InternalConvert(object arg, Type source, Type target, bool isAddress)
  35                 {
  36
  37             if (target == source)
  38                 return arg;
  39             if (target.IsValueType)
  40             {
  41                 if (source.IsValueType)
  42                 {
  43                     if (CanConvert (Type.GetTypeCode(target)))
  44                         throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.GetString(SR.NoConversionPossibleTo, DataContract.GetClrTypeFullName(target))));
  45                     else
  46                                                 return target;
  47                 }
  48                 else if (source.IsAssignableFrom(target))
  49                                         return arg;
  50                 else
  51                     throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.GetString(SR.IsNotAssignableFrom, DataContract.GetClrTypeFullName(target), DataContract.GetClrTypeFullName(source))));
  52             }
  53             else if (target.IsAssignableFrom(source))
  54                                 return arg;
  55             else if (source.IsAssignableFrom(target))
  56                                 return arg;
  57             else if (target.IsInterface || source.IsInterface)
  58                                 return arg;
  59             else
  60                 throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.GetString(SR.IsNotAssignableFrom, DataContract.GetClrTypeFullName(target), DataContract.GetClrTypeFullName(source))));
  61                 }
  62         }
  63 }
  64