Method Deserialize

src/algorithm/hgraph.cpp:1414–1493

}

void
HGraph::Deserialize(StreamReader& reader) {
    // try to deserialize footer (only in new version)
    auto footer = Footer::Parse(reader);

    if (footer == nullptr) {  // old format, DON'T EDIT, remove in the future
        logger::debug("parse with v0.14 version format");

        this->deserialize_basic_info_v0_14(reader);

        this->basic_flatten_codes_->Deserialize(reader);
        this->bottom_graph_->Deserialize(reader);
        if (this->use_reorder_) {
            this->high_precise_codes_->Deserialize(reader);
        }

        for (auto& route_graph : this->route_graphs_) {
            route_graph->Deserialize(reader);
        }
        auto new_size = max_capacity_.load();
        this->neighbors_mutex_->Resize(new_size);

        pool_ = std::make_shared<VisitedListPool>(1, allocator_, new_size, allocator_);

        if (this->extra_info_size_ > 0 && this->extra_infos_ != nullptr) {
            this->extra_infos_->Deserialize(reader);
        }
        this->total_count_ = this->basic_flatten_codes_->TotalCount();

        if (this->use_attribute_filter_ and this->attr_filter_index_ != nullptr) {
            this->attr_filter_index_->Deserialize(reader);
        }
    } else {  // create like `else if ( ver in [v0.15, v0.17] )` here if need in the future
        logger::debug("parse with new version format");

        BufferStreamReader buffer_reader(
            &reader, std::numeric_limits<uint64_t>::max(), this->allocator_);

        auto metadata = footer->GetMetadata();
        // metadata should NOT be nullptr if footer is not nullptr
        this->deserialize_basic_info(metadata->Get(BASIC_INFO));
        this->deserialize_label_info(buffer_reader);

        this->basic_flatten_codes_->Deserialize(buffer_reader);
        this->bottom_graph_->Deserialize(buffer_reader);
        if (this->use_reorder_) {
            this->high_precise_codes_->Deserialize(buffer_reader);
        }

        for (auto& route_graph : this->route_graphs_) {
            route_graph->Deserialize(buffer_reader);
        }
        auto new_size = max_capacity_.load();
        this->neighbors_mutex_->Resize(new_size);

        pool_ = std::make_shared<VisitedListPool>(1, allocator_, new_size, allocator_);

        if (this->extra_info_size_ > 0 && this->extra_infos_ != nullptr) {