Inclusion filtering with Json Path

[augustoqm]

I have a list of JSON paths, I want to run them over a "random" json and keep only the objects/nodes that are matched by at least one Json Path.

The way I've started doing was to expand the inclusionPaths into a list of all matched paths (like below). What I'm missing is a way to know if a certain jsonObject/jsonArray has one of those paths.

json jsonObject;
std::vector<std::string> extractedPaths;
for (const std::string& path : inclusionPaths) {
    auto result_options = jsonpath::result_options::path;
    json new_paths_json = jsonpath::json_query(jsonObject, path, result_options);
    for (auto val : new_paths_json.array_range()) {
        extractedPaths.emplace_back(val.as<jsoncons::string_view>());
    }
}

Following this thought, is there a way to get the the path of an object?

[danielaparker]

If I understand you correctly, perhaps like this?

    json jsonObject = json::parse(R"({"foo":1,"bar":2 })");
    auto inclusionPaths = std::unordered_set<std::string>{"$.foo", "$.baz"};

    std::vector<std::pair<std::string,json>> extractedPathValuePairs;

    auto callback = [&](const std::string& path, const json& val)
    {
        extractedPathValuePairs.emplace_back(path,val);
    };

    for (const std::string& path : inclusionPaths) {
        jsonpath::json_query(jsonObject, path, callback, jsonpath::result_options::path);
    }

    for (const auto& item : extractedPathValuePairs)
    {
        std::cout << item.first << ", " << item.second << "\n";
    }

[augustoqm]

This is it!
Thanks for the elegant solution!