UObject::Serialize

void UObject::Serialize( FArchive& Ar )
{
    SetFlags( RF_DebugSerialize );

    // Make sure this object's class's data is loaded.
    if( Class != UClass::StaticClass() )
        Ar.Preload( Class );

    // Special info.
    if( (!Ar.IsLoading() && !Ar.IsSaving()) )
        Ar << Name << Outer << Class;
    if( !Ar.IsLoading() && !Ar.IsSaving() )
        Ar << _Linker;

    // Execution stack.
    //!!how does the stack work in conjunction with transaction tracking?
    if( !Ar.IsTrans() )
    {
        if( GetFlags() & RF_HasStack )
        {
            if( !StateFrame )
                StateFrame = new FStateFrame( this );
            Ar << StateFrame->Node << StateFrame->StateNode;
            Ar << StateFrame->ProbeMask;
            Ar << StateFrame->LatentAction;
            if( StateFrame->Node )
            {
                Ar.Preload( StateFrame->Node );
                if( Ar.IsSaving() && StateFrame->Code )
                    check(StateFrame->Code>=&StateFrame->Node->Script(0) && StateFrame->Code<&StateFrame->Node->Script(StateFrame->Node->Script.Num()));
                INT Offset = StateFrame->Code ? StateFrame->Code - &StateFrame->Node->Script(0) : INDEX_NONE;
                Ar << Offset;
                if( Offset!=INDEX_NONE )
                    if( Offset<0 || Offset>=StateFrame->Node->Script.Num() )
                        appErrorf( TEXT("%s: Offset mismatch: %i %i"), *GetFullName(), Offset, StateFrame->Node->Script.Num() );
                StateFrame->Code = Offset!=INDEX_NONE ? &StateFrame->Node->Script(Offset) : NULL;
            }
            else StateFrame->Code = NULL;
        }
        else if( StateFrame )
        {
            delete StateFrame;
            StateFrame = NULL;
        }
    }

    // Serialize object properties which are defined in the class.
    if( Class != UClass::StaticClass() )
    {
        if( (Ar.IsLoading() || Ar.IsSaving()) && !Ar.IsTrans() )
            GetClass()->SerializeTaggedProperties( Ar, (BYTE*)this, Class );
        else
            GetClass()->SerializeBin( Ar, (BYTE*)this, 0 );
    }

    // Memory counting.
    SIZE_T Size = GetClass()->GetPropertiesSize();
    Ar.CountBytes( Size, Size );
}