95 lines
2.8 KiB
C++
95 lines
2.8 KiB
C++
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//
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// Created by phanes on 4/22/17.
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//
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#include "JSON_Loader.h"
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#include "helpers.h"
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JSON_Loader::JSON_Loader()
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{
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// empty
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}
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// loads json from a file into a deserializable type and sets to private member json_root
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int JSON_Loader::load_json_file( std::string filename, bool verbose )
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{
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// reads from a file into a Json::Value type.
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Json::Reader json_reader;
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// the a deserialized json type to contain what's read by the reader
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Json::Value json_root;
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// first, check if the file exists
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if (! exists( filename ) )
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{
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std::cerr << "File '" << filename << "' does not exist.";
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// exit with failure signal
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return 1;
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}
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// create the ifstream file handle
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std::ifstream json_file_ifstream( filename, std::ifstream::binary );
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// use the reader to parse the ifstream to the local property
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bool parsingSuccessful = json_reader.parse( json_file_ifstream, this->json_root );
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if (! parsingSuccessful )
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{
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std::cerr << "Failed to parse " << filename << ":\n\t" << json_reader.getFormattedErrorMessages();
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// exit with failure signal
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return 1;
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} else {
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// if in verbose mode, give the user an "it worked" message
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if (verbose)
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{
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std::cout << "Parsed " << filename << " with " << this->json_root.size() << " elements." << std::endl;
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}
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}
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// exit successfully
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return 0;
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}
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// loads json from std::string into a serialized type and sets to private member json_root
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int JSON_Loader::load_json_string( std::string input, bool verbose )
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{
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// reads from a string into a Json::Value type.
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Json::Reader json_reader;
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// the deserialized json type to contain what's read by the reader
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Json::Value json_root;
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// create the ifstream file handle
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std::ifstream json_file_ifstream( input.c_str(), std::ifstream::binary );
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// use the reader to parse the ifstream to the local property
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bool parsingSuccessful = json_reader.parse( json_file_ifstream, this->json_root );
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if (! parsingSuccessful )
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{
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std::cerr << "Failed to parse adhoc JSON value." << std::endl << input << std::endl << std::endl << json_reader.getFormattedErrorMessages();
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// exit with failure signal
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return 1;
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} else {
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// if in verbose mode, give the user an "it worked" message
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if (verbose)
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{
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std::cout << "Successfully parsed JSON string with " << this->json_root.size() << " elements. Value:" << std::endl;
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std::cout << input << std::endl;
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}
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}
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// exit successfully
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return 0;
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}
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// returns the serialized representation of json_root
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Json::Value JSON_Loader::as_serialized()
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{
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return this->json_root;
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}
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// returns the string representation of json_root
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std::string JSON_Loader::as_string()
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{
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return this->json_root.asString();
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}
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