Method readMetadata

plugins/rdb/io/RdbReader.cpp:186–304

void RdbReader::readMetadata(RdbPointcloud &reader, MetadataNode root)
{
    struct Converter // simple JSON to MetadataNode converter
    {
        static void add(
            MetadataNode&      parent,
            const std::string& name,
            const std::string& value
        )
        {
            try
            {
                NL::json node = NL::json::parse(value);
                add(parent, name, node);
            }
            catch (const NL::json::parse_error&)
            {
                parent.add(name, value);
            }
        }

        static void add(
            MetadataNode&      parent,
            const std::string& name,
            const NL::json& node
        )
        {
            if (node.is_null())
                parent.add(name, "");
            else if (node.is_boolean())
                parent.add(name, node.get<bool>());
            else if (node.is_number_unsigned())
                parent.add(name, node.get<uint64_t>());
            else if (node.is_number_integer())
                parent.add(name, node.get<int64_t>());
            else if (node.is_number_float())
                parent.add(name, node.get<double>());
            else if (node.is_string())
                parent.add(name, node.get<std::string>());
            else if (node.is_object())
            {
                MetadataNode object = parent.add(name);
                for (auto it : node.items())
                    add(object, it.key(), it.value());
            }
            else if (node.is_array())
            {
                for (size_t i = 0; i < node.size(); ++i)
                    add(parent, name, node.at(i));
            }
        }
    };

    // get database object
    using namespace riegl::rdb::pointcloud;
    riegl::rdb::Pointcloud& rdb = reader.pointcloud();

    // basic database information