/// <summary>
/// Creates the dynamic proxy method which calls given <see cref="ConstructorInfo"/>
/// </summary>
/// <param name="methodInfo"></param>
private static DynamicMethodDelegate CreateProxyMethod(ConstructorInfo constructor)
{
var method = new DynamicMethod(constructor.DeclaringType.Name + "_ctor_Proxy",
typeof(object),
new Type[] { typeof(object[]) },
constructor.DeclaringType);
var wrapper = new ILGeneratorWrapper(method.GetILGenerator());
var parameters = constructor.GetParameters();
var parameterTypes = new Type[parameters.Length + 1];
parameterTypes[0] = constructor.DeclaringType;
for (int i = 0; i < parameters.Length; i++)
{
parameterTypes[i + 1] = parameters[i].ParameterType;
}
wrapper.DeclareLocals(parameterTypes);
for (int i = 1; i < parameterTypes.Length; i++)
{
wrapper.EmitLoadArg(0);
wrapper.EmitLoadCons(i - 1);
wrapper.Emit(OpCodes.Ldelem_Ref);
wrapper.EmitCast(parameterTypes[i]);
wrapper.EmitStoreLocal(i);
}
for (int i = 1; i < parameterTypes.Length; i++)
{
wrapper.EmitLoadLoc(i);
}
wrapper.Emit_NewObj(constructor);
wrapper.EmitStoreLocal(0);
wrapper.EmitLoadLoc(0);
wrapper.Emit(OpCodes.Ret);
return(method.CreateDelegate(typeof(DynamicMethodDelegate)) as DynamicMethodDelegate);
}
/// <summary>
/// Initializes dynamic method
/// </summary>
/// <param name="methodInfo"></param>
private static DynamicMethodDelegate CreateMethodProxy(MethodInfo methodInfo)
{
var method = new DynamicMethod(methodInfo.Name + "_Proxy",
typeof(object),
new Type[] { typeof(object), typeof(object[]) },
methodInfo.DeclaringType);
var wrapper = new ILGeneratorWrapper(method.GetILGenerator());
var parameters = methodInfo.GetParameters();
var parameterTypes = new Type[parameters.Length];
for (int i = 0; i < parameters.Length; i++)
{
parameterTypes[i] = parameters[i].ParameterType;
}
wrapper.DeclareLocals(parameterTypes);
for (int i = 0; i < parameterTypes.Length; i++)
{
wrapper.EmitLoadArg(1);
wrapper.EmitLoadCons(i);
wrapper.Emit(OpCodes.Ldelem_Ref);
wrapper.EmitCast(parameterTypes[i]);
wrapper.EmitStoreLocal(i);
}
if (!methodInfo.IsStatic)
{
wrapper.Emit(OpCodes.Ldarg_0);
}
for (int i = 0; i < parameterTypes.Length; i++)
{
wrapper.EmitLoadLoc(i);
}
wrapper.EmitCall(methodInfo);
if (methodInfo.ReturnType == typeof(void))
{
wrapper.Emit(OpCodes.Ldnull);
}
else if (methodInfo.ReturnType.IsValueType)
{
wrapper.EmitBox(methodInfo.ReturnType);
}
wrapper.Emit(OpCodes.Ret);
return(method.CreateDelegate(typeof(DynamicMethodDelegate)) as DynamicMethodDelegate);
}
/// <summary>
/// Creates get method proxy for the given <see cref="FieldInfo"/>
/// </summary>
/// <param name="fieldInfo">The field info</param>
private static GetFieldDelegate CreateGetMethodProxy(FieldInfo fieldInfo)
{
var method = new DynamicMethod(fieldInfo.Name + "_Get_Proxy",
typeof(object),
new[] { typeof(object) },
fieldInfo.DeclaringType);
var wrapper = new ILGeneratorWrapper(method.GetILGenerator());
wrapper.DeclareLocals(new Type[] { fieldInfo.FieldType });
wrapper.EmitLoadArg(0);
wrapper.EmitLoadField(fieldInfo);
wrapper.EmitStoreLocal(0);
wrapper.EmitLoadLoc(0);
if (fieldInfo.FieldType.IsValueType)
{
wrapper.EmitBox(fieldInfo.FieldType);
}
wrapper.Emit(OpCodes.Ret);
return(method.CreateDelegate(typeof(GetFieldDelegate)) as GetFieldDelegate);
}