static void ImplementIDataTransferObject(EmittedClass builder, EmittedConstructor cctor, List <PropertyInfo> props,
EmittedField dirtyFlags)
{
builder.AddInterfaceImplementation(typeof(IDataTransferObject));
ImplementIDataTransferObjectGetDirtyFlags(builder, dirtyFlags);
ImplementIDataTransferObjectResetDirtyFlags(builder, props, dirtyFlags);
ImplementIDataTransferObjectIsDirty(builder, cctor, props, dirtyFlags);
ImplementICloneableClone(builder, props, dirtyFlags);
}
static void ImplementIDataTransferObjectIsDirty(EmittedClass builder, EmittedConstructor cctor,
List <PropertyInfo> props,
EmittedField dirtyFlags)
{
var fieldMap = builder.DefineField <string[]>("__fieldMap");
fieldMap.ClearAttributes();
fieldMap.IncludeAttributes(FieldAttributes.Static | FieldAttributes.InitOnly | FieldAttributes.Private);
cctor.ContributeInstructions((m, il) =>
{
var arr = il.DeclareLocal(typeof(String[]));
il.Nop();
il.NewArr(typeof(string), props.Count);
il.StoreLocal(arr);
for (var i = 0; i < props.Count; i++)
{
il.LoadLocal(arr);
il.LoadValue(i);
il.LoadValue(props[i].Name);
il.Emit(OpCodes.Stelem, typeof(string));
}
il.LoadLocal(arr);
il.StoreField(fieldMap);
il.Nop();
il.Nop();
});
var method = builder.DefineMethod("IsDirty");
method.ClearAttributes();
method.IncludeAttributes(MethodAttributes.Public | MethodAttributes.HideBySig | MethodAttributes.NewSlot |
MethodAttributes.Virtual | MethodAttributes.Final);
method.ReturnType = TypeRef.FromType <bool>();
method.DefineParameter("member", typeof(String));
method.ContributeInstructions(
(m, il) =>
{
il.DeclareLocal(typeof(Int32));
il.DeclareLocal(typeof(bool));
il.DeclareLocal(typeof(bool));
var proceed = il.DefineLabel();
var yep = il.DefineLabel();
il.Nop();
il.LoadArg_1();
il.LoadNull();
il.CompareEqual();
il.LoadValue(false);
il.CompareEqual();
il.StoreLocal_2();
il.LoadLocal_2();
il.BranchIfTrue_ShortForm(proceed);
il.LoadValue("member");
il.New <ArgumentNullException>(typeof(string));
il.Throw();
il.MarkLabel(proceed);
il.LoadField(fieldMap);
il.LoadArg_1();
var indexOf = typeof(Array).MatchGenericMethod("IndexOf", BindingFlags.Public | BindingFlags.Static,
1, typeof(int), typeof(string[]), typeof(string));
il.Call(indexOf.MakeGenericMethod(typeof(string)));
il.StoreLocal_0();
il.LoadLocal_0();
il.LoadValue(0);
il.CompareLessThan();
il.LoadValue(0);
il.CompareEqual();
il.StoreLocal_2();
il.LoadLocal_2();
il.BranchIfTrue(yep);
il.Nop();
il.LoadValue("member");
il.LoadValue(String.Concat(typeof(T).GetReadableSimpleName(), " does not define property: `"));
il.LoadArg_1();
il.LoadValue("`.");
il.Call <string>("Concat", BindingFlags.Static | BindingFlags.Public, typeof(string), typeof(string),
typeof(string));
il.NewObj(
typeof(ArgumentOutOfRangeException).GetConstructor(new[] { typeof(string), typeof(string) }));
il.Throw();
il.MarkLabel(yep);
il.LoadArg_0();
il.LoadFieldAddress(dirtyFlags);
il.LoadLocal_0();
il.Call <BitVector>("get_Item", typeof(int));
il.StoreLocal_1();
il.DefineAndMarkLabel();
il.LoadLocal_1();
});
}
