JSONMatcher.hpp

#pragma once
 
/* Copyright 2021-2024 Franz Poeschel
 *
 * This file is part of openPMD-api.
 *
 * openPMD-api is free software: you can redistribute it and/or modify
 * it under the terms of of either the GNU General Public License or
 * the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * openPMD-api is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License and the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License
 * and the GNU Lesser General Public License along with openPMD-api.
 * If not, see <http://www.gnu.org/licenses/>.
 */
 
#include "openPMD/auxiliary/JSON_internal.hpp"
 
#include <regex>
#include <string>
#include <vector>
 
namespace openPMD::json
{
struct Pattern
{
    std::regex pattern;
    nlohmann::json config;
 
    Pattern(std::string const &pattern_in, nlohmann::json config_in);
};

class MatcherPerBackend
{
private:
    std::vector<Pattern> m_patterns;
 
    void init(TracingJSON config);
 
public:
    explicit MatcherPerBackend();

    MatcherPerBackend(std::string backendName, TracingJSON config);
 
    std::string backendName;

    auto get(std::string const &datasetPath) const -> nlohmann::json const &;
};

class JsonMatcher
{
private:
    // Only one backend matcher is initialized lazily upon calling
    // JsonMatcher::get()
    // Usually only one backend is active, so initializing all of them
    // is not necessary.
    MatcherPerBackend m_backendMatcher;
    TracingJSON m_entireConfig;
 
    auto init() -> void;
 
public:
    explicit JsonMatcher();

    JsonMatcher(openPMD::json::TracingJSON config);

    auto get(std::string const &datasetPath, std::string const &backendName)
        -> ParsedConfig;

    auto getDefault(std::string const &backendName) -> TracingJSON;
 
    auto initBackendLazily(std::string const &backendName) -> void;
};
} // namespace openPMD::json