public Tuple <Type, Func <object> > CreateProxyType(Type t, bool compileProxyContructor = true)
{
Type interceptorType;
Type typeToDerive = t;
bool genericType = false;
GeneratedTypeKey key = new GeneratedTypeKey(typeToDerive);
Tuple <Type, Func <object> > tuple;
if (DerivedClasses.TryGetValue(key, out tuple))
{
return(tuple);
}
if (t.IsGenericType)
{
typeToDerive = t.GetGenericTypeDefinition();
genericType = true;
}
if (!CanIntercept(t))
{
throw new InvalidOperationException(
string.Format(CultureInfo.CurrentCulture, Resources.InterceptionNotSupported, t.Name));
}
lock (DerivedClasses)
{
InterceptingClassGenerator generator = new InterceptingClassGenerator(typeToDerive);
interceptorType = generator.GenerateType();
if (genericType)
{
interceptorType = interceptorType.MakeGenericType(t.GetGenericArguments());
}
Func <object> contructor = null;
if (compileProxyContructor)
{
contructor = Expression.Lambda <Func <object> >(Expression.New(interceptorType)).Compile();
}
tuple = new Tuple <Type, Func <object> >(interceptorType, contructor);
DerivedClasses[key] = tuple;
}
if (genericType)
{
IList <PropertyInfoEx> tableInfo;
TypePropertiesCache.VerifyInformationIsLoaded(interceptorType, out tableInfo);
}
else
{
TypePropertiesCache.AssociateTypeWithProxyType(t, interceptorType);
}
PropertiesExDictionary dic;
TypePropertiesCache.cachePropertiesEx.TryGetValue(interceptorType, out dic);
interceptorType.GetField("__Props").SetValue(null, (PropertyInfoEx[])dic.PropertiesList);
//PropertyInfoEx[] currentProps;
//TypePropertiesCache.cachePropertiesEx.TryGetValue(t, out currentProps);
//TypePropertiesCache.cachePropertiesEx.Remove(t);
//TypePropertiesCache.cachePropertiesEx.Add(interceptorType, currentProps);
return(tuple);
}
/// <summary>
/// Create the wrapper class for the given type.
/// </summary>
/// <returns>Wrapper type.</returns>
public Type GenerateType()
{
var props = TypePropertiesCache.GetArrayPropertiesOrderedByIndex(typeToIntercept);
AddProperties(props);
AddConstructors();
ConstructorBuilder staticConstructorBuilder = typeBuilder.DefineConstructor(MethodAttributes.Public | MethodAttributes.Static, CallingConventions.Standard, Type.EmptyTypes);
ILGenerator staticConstructorILGenerator = staticConstructorBuilder.GetILGenerator();
foreach (var method in methodOverrides)
{
if (method.statficfieldForMethodHandle != null)
{
staticConstructorILGenerator.Emit(OpCodes.Ldtoken, method.methodInfoForMethodHandle);
if (method.methodToOverride.DeclaringType.IsGenericType)
{
// if the declaring type is generic, we need to get the method from the target type
staticConstructorILGenerator.Emit(OpCodes.Ldtoken, method.targetType);
staticConstructorILGenerator.Emit(OpCodes.Call, MethodBaseMethods.GetMethodForGenericFromHandle);
}
else
{
staticConstructorILGenerator.Emit(OpCodes.Call, MethodBaseMethods.GetMethodFromHandle); // target method
}
}
staticConstructorILGenerator.Emit(OpCodes.Stsfld, method.statficfieldForMethodHandle);
}
staticConstructorILGenerator.Emit(OpCodes.Ret);
Type result = typeBuilder.CreateType();
return(result);
}
