void PropertyMapReader::Read (InputStream& stream)
{
try
{
const PropertyMapHeader& header = stream.Read<PropertyMapHeader> ();
//синхронизация лэйаута
Impl::LayoutDescPtr layout_desc;
object_id_t layout_id = 0;
if (header.has_layout)
{
layout_desc = impl->ReadLayout (stream);
layout_id = layout_desc->source_id;
}
else if (header.has_layout_id)
{
layout_id = read (stream, xtl::type<object_id_t> ());
}
//синхронизация карты свойств
Impl::MapDescMap::iterator map_iter = impl->property_maps.find (header.id);
Impl::MapDescPtr map_desc;
if (map_iter != impl->property_maps.end ())
{
map_desc = map_iter->second;
if (!(header.has_layout_id || header.has_layout) || (!layout_desc && map_desc->layout->source_id == layout_id && map_desc->layout_hash == map_desc->layout->layout.Hash ()))
{
layout_desc = map_desc->layout;
}
else
{
Impl::LayoutMap::iterator iter = impl->layouts.find (layout_id);
if (iter == impl->layouts.end ())
throw xtl::format_operation_exception ("", "Internal error: can't find layout %llu to update property map %llu", layout_id, header.id);
layout_desc = iter->second;
//обновление лэйаута существующей карты
const common::PropertyLayout& layout = layout_desc->layout;
map_desc->properties.Reset (layout);
map_desc->layout = layout_desc;
map_desc->layout_hash = layout.Hash ();
}
}
else
{
//поиск лэйаута
Impl::LayoutMap::iterator iter = impl->layouts.find (layout_id);
if (iter == impl->layouts.end ())
throw xtl::format_operation_exception ("", "Internal error: no layout %llu for new property map %llu", layout_id, header.id);
layout_desc = iter->second;
//новая карта свойств
map_desc = Impl::MapDescPtr (new Impl::MapDesc (layout_desc), false);
}
//синхронизация карты свойств
common::PropertyMap& properties = map_desc->properties;
try
{
//синхронизация буфера карты свойств
size_t src_buffer_size = stream.Read<uint32> ();
const void* src_buffer = stream.ReadData (src_buffer_size);
if (src_buffer_size != properties.BufferSize ())
throw xtl::format_operation_exception ("", "Internal error: can't sync property map %llu. Incoming buffer data size is %u but actual is %u", header.id, src_buffer_size, properties.BufferSize ());
properties.SetBufferData (src_buffer);
//синхронизация строк
for (IndexArray::iterator iter=layout_desc->string_indices.begin (), end=layout_desc->string_indices.end (); iter!=end; ++iter)
{
const char* string = read (stream, xtl::type<const char*> ());
properties.SetProperty (*iter, string);
}
}
catch (...)
{
//reset strings, because SetBufferData is atomic operation
const common::PropertyDesc* property = properties.Layout ().Properties ();
for (size_t i=0, count=properties.Layout ().Size (); i<count; i++, property++)
{
if (property->type == common::PropertyType_String)
properties.SetProperty (i, "");
}
throw;
}
//обновление структур данных
if (map_iter == impl->property_maps.end ())
impl->property_maps.insert_pair (header.id, map_desc);
}
catch (xtl::exception& e)
{
e.touch ("render::scene::interchange::PropertyMapReader::Read");
throw;
}
}
