C++ DataPtr::ConnectField方法代码示例

void Composite::Visit(void* instance, Visitor& visitor) const
{
    if (!instance)
    {
        return;
    }

    DynArray< Field >::ConstIterator itr = m_Fields.Begin();
    DynArray< Field >::ConstIterator end = m_Fields.End();
    for ( ; itr != end; ++itr )
    {
        const Field* field = &*itr;

        if ( !visitor.VisitField( instance, field ) )
        {
            continue;
        }

        DataPtr data = field->CreateData();

        data->ConnectField( instance, field );

        data->Accept( visitor );

        data->Disconnect();
    }
}

DataPtr Field::ShouldSerialize( void* instance ) const
{
    // never write discard fields
    if ( m_Flags & FieldFlags::Discard )
    {
        return NULL;
    }

    ObjectPtr object = Registry::GetInstance()->CreateInstance( m_DataClass );
    DataPtr data = ThrowCast< Data >( object );
    data->ConnectField( instance, this );

    // always write force fields
    if ( m_Flags & FieldFlags::Force )
    {
        return data;
    }

    // check for empty/null/invalid state
    if ( !data->ShouldSerialize() )
    {
        return NULL;
    }

    // don't write field at the default value
    DataPtr defaultData = CreateDefaultData();
    if ( defaultData.ReferencesObject() && defaultData->Equals(data) )
    {
        return NULL;
    }

    return data;
}

void Composite::Copy( void* source, void* destination ) const
{
    if ( source != destination )
    {
#pragma TODO("This should be inside a virtual function (like CopyTo) instead of a type check conditional")
        if ( IsType( GetClass<Data>() ) )
        {
            Data* src = static_cast<Data*>(source);
            Data* dest = static_cast<Data*>(destination);
            dest->Set( src );
        }
        else
        {
            DynArray< Field >::ConstIterator itr = m_Fields.Begin();
            DynArray< Field >::ConstIterator end = m_Fields.End();
            for ( ; itr != end; ++itr )
            {
                const Field* field = &*itr;

                // create data objects
                DataPtr lhs = field->CreateData();
                DataPtr rhs = field->CreateData();

                // connnect
                lhs->ConnectField(destination, field);
                rhs->ConnectField(source, field);

                // for normal data types, run overloaded assignement operator via data's vtable
                // for reference container types, this deep copies containers (which is bad for 
                //  non-cloneable (FieldFlags::Share) reference containers)
                bool result = lhs->Set(rhs, field->m_Flags & FieldFlags::Share ? DataFlags::Shallow : 0);
                HELIUM_ASSERT(result);

                // disconnect
                lhs->Disconnect();
                rhs->Disconnect();
            }
        }
    }
}

bool Composite::Equals(void* a, void* b) const
{
    if (a == b)
    {
        return true;
    }

    if (!a || !b)
    {
        return false;
    }

    DynArray< Field >::ConstIterator itr = m_Fields.Begin();
    DynArray< Field >::ConstIterator end = m_Fields.End();
    for ( ; itr != end; ++itr )
    {
        const Field* field = &*itr;

        // create data objects
        DataPtr aData = field->CreateData();
        DataPtr bData = field->CreateData();

        // connnect
        aData->ConnectField(a, field);
        bData->ConnectField(b, field);

        bool equality = aData->Equals( bData );

        // disconnect
        aData->Disconnect();
        bData->Disconnect();

        if ( !equality )
        {
            return false;
        }
    }

    return true;
}

DataPtr Field::CreateData(void* instance) const
{
    DataPtr data = CreateData();

    if ( data.ReferencesObject() )
    {
        if ( instance )
        {
            data->ConnectField( instance, this );
        }
    }

    return data;
}

//.........这里部分代码省略.........
            choice->a_IsDropDown.Set( true );
            choice->a_IsReadOnly.Set( readOnly );

            container->AddChild(choice);
        }
        else
        {
            if ( field->m_DataClass == Reflect::GetClass<BoolData>() )
            {
                CheckBoxPtr checkBox = CreateControl<CheckBox>();
                checkBox->a_IsReadOnly.Set( readOnly );
                checkBox->a_HelpText.Set( field->GetProperty( TXT( "HelpText" ) ) );
                container->AddChild( checkBox );
            }
            else
            {
                ValuePtr value = CreateControl<Value>();
                value->a_IsReadOnly.Set( readOnly );
                value->a_HelpText.Set( field->GetProperty( TXT( "HelpText" ) ) );
                container->AddChild( value );
            }
        }
    }

    //
    // Setup label
    //

    LabelPtr label = NULL;

    {
        V_Control::const_iterator itr = container->GetChildren().begin();
        V_Control::const_iterator end = container->GetChildren().end();
        for( ; itr != end; ++itr )
        {
            Label* label = Reflect::SafeCast<Label>( *itr );
            if (label)
            {
                break;
            }
        }
    }

    if (!label.ReferencesObject())
    {
        label = CreateControl<Label>();

        tstring temp;
        field->GetProperty( TXT( "UIName" ), temp );
        if ( temp.empty() )
        {
            bool converted = Helium::ConvertString( field->m_Name, temp );
            HELIUM_ASSERT( converted );
        }

        label->BindText( temp );
        label->a_HelpText.Set( field->GetProperty( TXT( "HelpText" ) ) );

        container->InsertChild(0, label);
    }

    //
    // Bind data
    //

    std::vector<Data*> ser;

    {
        std::vector<Reflect::Object*>::const_iterator itr = instances.begin();
        std::vector<Reflect::Object*>::const_iterator end = instances.end();
        for ( ; itr != end; ++itr )
        {
            DataPtr s = field->CreateData();

            if (!s->IsClass(Reflect::GetClass<ContainerData>()))
            {
                s->ConnectField(*itr, field);

                ser.push_back(s);

                m_Datas.push_back(s);
            }
        }
    }

    Helium::SmartPtr< MultiStringFormatter<Data> > data = new MultiStringFormatter<Data>( ser );

    container->Bind( data );

    //
    // Set default
    //

    DataPtr defaultData = field->CreateDefaultData();
    if (defaultData.ReferencesObject())
    {
        tstringstream defaultStream;
        *defaultData >> defaultStream;
        container->a_Default.Set( defaultStream.str() );
    }

void ReflectStlVectorInterpreter::InterpretField(const Field* field, const std::vector<Reflect::Object*>& instances, Container* parent)
{
    if (field->m_Flags & FieldFlags::Hide)
    {
        return;
    }

    // create the label
    ContainerPtr labelContainer = CreateControl<Container>();
    parent->AddChild( labelContainer );
    LabelPtr label = CreateControl< Label >();
    label->a_HelpText.Set( field->GetProperty( TXT( "HelpText" ) ) );
    labelContainer->AddChild( label );

    tstring temp;
    field->GetProperty( TXT( "UIName" ), temp );
    if ( temp.empty() )
    {
        bool converted = Helium::ConvertString( field->m_Name, temp );
        HELIUM_ASSERT( converted );
    }

    label->BindText( temp );

    // create the list view
    ContainerPtr listContainer = CreateControl<Container>();
    parent->AddChild( listContainer );
    ListPtr list = CreateControl<List>();
    list->a_HelpText.Set( field->GetProperty( TXT( "HelpText" ) ) );
    listContainer->AddChild( list );

    // create the buttons
    ButtonPtr addButton;
    ButtonPtr removeButton;
    ButtonPtr upButton;
    ButtonPtr downButton;
    if ( !(field->m_Flags & FieldFlags::ReadOnly) )
    {
        addButton = AddAddButton( list );
        removeButton = AddRemoveButton( list );
        upButton = AddMoveUpButton( list );
        downButton = AddMoveDownButton( list );
    }

    // add the buttons to the container
    ContainerPtr buttonContainer = CreateControl<Container>();
    parent->AddChild( buttonContainer );
    if ( addButton )
    {
        buttonContainer->AddChild( addButton );
    }
    if ( removeButton )
    {
        buttonContainer->AddChild( removeButton );
    }
    if ( upButton )
    {
        buttonContainer->AddChild( upButton );
    }
    if ( downButton )
    {
        buttonContainer->AddChild( downButton );
    }

    // create the data objects
    std::vector<Reflect::Object*>::const_iterator itr = instances.begin();
    std::vector<Reflect::Object*>::const_iterator end = instances.end();
    for ( ; itr != end; ++itr )
    {
        DataPtr s = field->CreateData();

        OnCreateFieldData( s );

        s->ConnectField(*itr, field);

        m_Datas.push_back(s);
    }

    // bind the ui to the data objects
    Helium::SmartPtr< MultiStringFormatter<Data> > data = new MultiStringFormatter<Reflect::Data>( (std::vector<Reflect::Data*>&)m_Datas );
    list->Bind( data );

    // setup the default value
    DataPtr defaultData = field->CreateDefaultData();
    if (defaultData)
    {
        tstringstream defaultStream;
        *defaultData >> defaultStream;
        list->a_Default.Set( defaultStream.str() );
    }
}

void ArchiveXML::DeserializeFields( void* structure, const Structure* type )
{
    if ( m_Iterator.GetCurrent()->GetFirstChild() )
    {
        // advance to the first child
        m_Iterator.Advance();

        for ( XMLElement* sibling = m_Iterator.GetCurrent(); sibling != NULL; sibling = sibling->GetNextSibling() )
        {
            HELIUM_ASSERT( m_Iterator.GetCurrent() == sibling );

            const String* fieldNameStr = sibling->GetAttributeValue( Name( TXT("Name") ) );
            uint32_t fieldNameCrc = fieldNameStr ? Crc32( fieldNameStr->GetData() ) : 0x0;

            const Field* field = type->FindFieldByName(fieldNameCrc);
            if ( field )
            {
#ifdef REFLECT_ARCHIVE_VERBOSE
                m_Indent.Get(stdout);
                Log::Debug(TXT("Deserializing field %s\n"), field->m_Name);
                m_Indent.Push();
#endif

                // pull and structure and downcast to data
                DataPtr latentData = SafeCast<Data>( Allocate() );
                if (!latentData.ReferencesObject())
                {
                    // this should never happen, the type id read from the file is bogus
                    throw Reflect::TypeInformationException( TXT( "Unknown data for field %s (%s)" ), field->m_Name, m_Path.c_str() );
#pragma TODO("Support blind data")
                }

                // if the types match we are a natural fit to just deserialize directly into the field data
                if ( field->m_DataClass == field->m_DataClass )
                {
                    // set data pointer
                    latentData->ConnectField( structure, field );

                    // process natively
                    DeserializeInstance( (ObjectPtr&)latentData );

                    // disconnect
                    latentData->Disconnect();
                }
                else // else the type does not match, deserialize it into temp data then attempt to cast it into the field data
                {
                    REFLECT_SCOPE_TIMER(("Casting"));

                    // construct current serialization structure
                    ObjectPtr currentObject = Registry::GetInstance()->CreateInstance( field->m_DataClass );

                    // downcast to data
                    DataPtr currentData = SafeCast<Data>(currentObject);
                    if (!currentData.ReferencesObject())
                    {
                        // this should never happen, the type id in the rtti data is bogus
                        throw Reflect::TypeInformationException( TXT( "Invalid type id for field %s (%s)" ), field->m_Name, m_Path.c_str() );
                    }

                    // process into temporary memory
                    currentData->ConnectField(structure, field);

                    // process natively
                    DeserializeInstance( (ObjectPtr&)latentData );

                    // attempt cast data into new definition
                    Data::CastValue( latentData, currentData, DataFlags::Shallow );

                    // disconnect
                    currentData->Disconnect();
                }
            }

#ifdef REFLECT_ARCHIVE_VERBOSE
            m_Indent.Pop();
#endif
        }
    }
    else
    {
        // advance to the next element
        m_Iterator.Advance();
    }
}

void ArchiveBinary::DeserializeFields( void* structure, const Structure* type )
{
    int32_t fieldCount = -1;
    m_Stream->Read(&fieldCount); 

    for (int i=0; i<fieldCount; i++)
    {
        uint32_t fieldNameCrc = BeginCrc32();
        m_Stream->Read( &fieldNameCrc );

        const Field* field = type->FindFieldByName(fieldNameCrc);
        if ( field )
        {
#ifdef REFLECT_ARCHIVE_VERBOSE
            m_Indent.Get(stdout);
            Log::Print(TXT("Deserializing field %s\n"), field->m_Name);
            m_Indent.Push();
#endif

            // pull and structure and downcast to data
            DataPtr latentData = SafeCast<Data>( Allocate() );
            if (!latentData.ReferencesObject())
            {
                // this should never happen, the type id read from the file is bogus
                throw Reflect::TypeInformationException( TXT( "Unknown data for field %s (%s)" ), field->m_Name, m_Path.c_str() );
#pragma TODO("Support blind data")
            }

            // if the types match we are a natural fit to just deserialize directly into the field data
            if ( field->m_DataClass == field->m_DataClass )
            {
                // set data pointer
                latentData->ConnectField( structure, field );

                // process natively
                DeserializeInstance( (ObjectPtr&)latentData );

                // disconnect
                latentData->Disconnect();
            }
            else // else the type does not match, deserialize it into temp data then attempt to cast it into the field data
            {
                REFLECT_SCOPE_TIMER(("Casting"));

                // construct current serialization structure
                ObjectPtr currentObject = Registry::GetInstance()->CreateInstance( field->m_DataClass );

                // downcast to data
                DataPtr currentData = SafeCast<Data>(currentObject);
                if (!currentData.ReferencesObject())
                {
                    // this should never happen, the type id in the rtti data is bogus
                    throw Reflect::TypeInformationException( TXT( "Invalid type id for field %s (%s)" ), field->m_Name, m_Path.c_str() );
                }

                // process into temporary memory
                currentData->ConnectField(structure, field);

                // process natively
                DeserializeInstance( (ObjectPtr&)latentData );

                // attempt cast data into new definition
                Data::CastValue( latentData, currentData, DataFlags::Shallow );

                // disconnect
                currentData->Disconnect();
            }
        }

#ifdef REFLECT_ARCHIVE_VERBOSE
        m_Indent.Pop();
#endif
    }

    int32_t terminator = -1;
    m_Stream->Read(&terminator); 
    if (terminator != -1)
    {
        throw Reflect::DataFormatException( TXT( "Unterminated field array block (%s)" ), m_Path.c_str() );
    }
}

//.........这里部分代码省略.........
        value->a_IsReadOnly.Set( readOnly );
        value->a_HelpText.Set( field->GetProperty( TXT( "HelpText" ) ) );
        container->AddChild( value );
    }


    //
    // Setup label
    //

    LabelPtr label = NULL;

    {
        V_Control::const_iterator itr = container->GetChildren().begin();
        V_Control::const_iterator end = container->GetChildren().end();
        for( ; itr != end; ++itr )
        {
            Label* label = Reflect::SafeCast<Label>( *itr );
            if (label)
            {
                break;
            }
        }
    }

    if (!label.ReferencesObject())
    {
        label = CreateControl< Label >();

        tstring temp;
        field->GetProperty( TXT( "UIName" ), temp );
        if ( temp.empty() )
        {
            bool converted = Helium::ConvertString( field->m_Name, temp );
            HELIUM_ASSERT( converted );
        }

        label->BindText( temp );
        label->a_HelpText.Set( field->GetProperty( TXT( "HelpText" ) ) );

        container->InsertChild(0, label);
    }

    //
    // Create type m_FinderSpecific data bound to this and additional instances
    //

    std::vector<Data*> ser;

    {
        std::vector<Reflect::Object*>::const_iterator itr = instances.begin();
        std::vector<Reflect::Object*>::const_iterator end = instances.end();
        for ( ; itr != end; ++itr )
        {
            DataPtr s = field->CreateData();

            if (s->IsClass(Reflect::GetClass<ContainerData>()))
            {
                return;
            }

            s->ConnectField(*itr, field);

            ser.push_back(s);

            m_Datas.push_back(s);
        }
    }

    //
    // Create data and bind
    //

    Helium::SmartPtr< MultiStringFormatter<Data> > data = new MultiStringFormatter<Data>( ser );

    if (changingDelegate.Valid())
    {
        data->AddChangingListener( changingDelegate );
    }

    {
        std::vector<ContainerPtr>::const_iterator itr = groups.begin();
        std::vector<ContainerPtr>::const_iterator end = groups.end();
        for ( ; itr != end; ++itr )
        {
            (*itr)->Bind( data );
        }
    }

    //
    // Set default
    //

    DataPtr defaultData = field->CreateDefaultData();
    if (defaultData.ReferencesObject())
    {
        tstringstream defaultStream;
        *defaultData >> defaultStream;
        container->a_Default.Set( defaultStream.str() );
    }