private void ImplementProtectedFieldAccessors()
{
// For protected fields to be accessible from the derived type in Silverlight,
// we need to create public helper methods that expose them. These methods are
// used by the IOldDynamicObject implementation (in UserTypeOps.GetRuleHelper)
FieldInfo[] fields = _baseType.GetFields(BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static | BindingFlags.FlattenHierarchy);
foreach (FieldInfo fi in fields)
{
if (!fi.IsFamily && !fi.IsFamilyOrAssembly)
{
continue;
}
List <string> fieldAccessorNames = new List <string>();
PropertyBuilder pb = _tb.DefineProperty(fi.Name, PropertyAttributes.None, fi.FieldType, Type.EmptyTypes);
MethodAttributes methodAttrs = MethodAttributes.Public | MethodAttributes.HideBySig | MethodAttributes.SpecialName;
if (fi.IsStatic)
{
methodAttrs |= MethodAttributes.Static;
}
MethodBuilder method;
method = _tb.DefineMethod(FieldGetterPrefix + fi.Name, methodAttrs,
fi.FieldType, Type.EmptyTypes);
ILGen il = CreateILGen(method.GetILGenerator());
if (!fi.IsStatic)
{
il.EmitLoadArg(0);
}
if (fi.IsLiteral)
{
// literal fields need to be inlined directly in here... We use GetRawConstant
// which will work even in partial trust if the constant is protected.
object value = fi.GetRawConstantValue();
switch (Type.GetTypeCode(fi.FieldType))
{
case TypeCode.Boolean:
if ((bool)value)
{
il.Emit(OpCodes.Ldc_I4_1);
}
else
{
il.Emit(OpCodes.Ldc_I4_0);
}
break;
case TypeCode.Byte: il.Emit(OpCodes.Ldc_I4, (byte)value); break;
case TypeCode.Char: il.Emit(OpCodes.Ldc_I4, (char)value); break;
case TypeCode.Double: il.Emit(OpCodes.Ldc_R8, (double)value); break;
case TypeCode.Int16: il.Emit(OpCodes.Ldc_I4, (short)value); break;
case TypeCode.Int32: il.Emit(OpCodes.Ldc_I4, (int)value); break;
case TypeCode.Int64: il.Emit(OpCodes.Ldc_I8, (long)value); break;
case TypeCode.SByte: il.Emit(OpCodes.Ldc_I4, (sbyte)value); break;
case TypeCode.Single: il.Emit(OpCodes.Ldc_R4, (float)value); break;
case TypeCode.String: il.Emit(OpCodes.Ldstr, (string)value); break;
case TypeCode.UInt16: il.Emit(OpCodes.Ldc_I4, (ushort)value); break;
case TypeCode.UInt32: il.Emit(OpCodes.Ldc_I4, (uint)value); break;
case TypeCode.UInt64: il.Emit(OpCodes.Ldc_I8, (ulong)value); break;
}
}
else
{
il.EmitFieldGet(fi);
}
il.Emit(OpCodes.Ret);
pb.SetGetMethod(method);
fieldAccessorNames.Add(method.Name);
if (!fi.IsLiteral && !fi.IsInitOnly)
{
method = _tb.DefineMethod(FieldSetterPrefix + fi.Name, methodAttrs,
null, new Type[] { fi.FieldType });
method.DefineParameter(1, ParameterAttributes.None, "value");
il = CreateILGen(method.GetILGenerator());
il.EmitLoadArg(0);
if (!fi.IsStatic)
{
il.EmitLoadArg(1);
}
il.EmitFieldSet(fi);
il.Emit(OpCodes.Ret);
pb.SetSetMethod(method);
fieldAccessorNames.Add(method.Name);
}
_specialNames.SetSpecialName(fi.Name, fieldAccessorNames);
}
}
