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/* Wrapper for Jannson library to process Json files in OOP. | ||
* | ||
* Author: Pascal Bauer <[email protected]> | ||
* | ||
* SPDX-FileCopyrightText: 2023-2024 Pascal Bauer <[email protected]> | ||
* SPDX-License-Identifier: Apache-2.0 | ||
*/ | ||
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#pragma once | ||
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#include <jansson.h> | ||
#include <memory> | ||
#include <spdlog/common.h> | ||
#include <string> | ||
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class JsonParser { | ||
private: | ||
inline static auto logger = villas::logging.get("Json Parser"); | ||
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public: | ||
json_t* json; | ||
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public: | ||
JsonParser(json_t *json) : json(json) {} | ||
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JsonParser(const std::string &configFilePath) { | ||
FILE *f = fopen(configFilePath.c_str(), "r"); | ||
if (!f) | ||
throw RuntimeError("Cannot open config file: {}", configFilePath); | ||
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this->json = json_loadf(f, 0, nullptr); | ||
if (!json) { | ||
logger->error("Cannot parse JSON config"); | ||
fclose(f); | ||
throw RuntimeError("Cannot parse JSON config"); | ||
} | ||
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fclose(f); | ||
} | ||
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~JsonParser() { | ||
json_decref(json); | ||
} | ||
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json_t* get(const std::string &key) { | ||
json_t* result = json_object_get(this->json, key.c_str()); | ||
if (result == nullptr) { | ||
logger->error("No section {} found in config", key); | ||
exit(1); | ||
} | ||
return result; | ||
} | ||
}; |