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/*************************************************************************************************
* Example to store structured data
*
* Copyright 2020 Google LLC
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of the License at
* https://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software distributed under the
* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language governing permissions
* and limitations under the License.
*************************************************************************************************/
#include <map>
#include <vector>
#include "tkrzw_dbm_hash.h"
#include "tkrzw_str_util.h"
// Main routine.
int main(int argc, char** argv) {
// All symbols of Tkrzw are under the namespace "tkrzw".
using namespace tkrzw;
// Creates the database manager.
HashDBM dbm;
// Opens a new database.
dbm.Open("casket.tkh", true, File::OPEN_TRUNCATE);
// Makes a map representing structured data.
std::map<std::string, std::string> record;
record["name"] = "John Doe";
record["id"] = SerializeBasicValue<int32_t>(98765);
record["rating"] = SerializeBasicValue<double>(0.8);
std::vector<std::string> medals = {"gold", "silver", "bronze"};
record["medals"] = SerializeStrVector(medals);
std::vector<int32_t> rivals = {123456, 654321};
record["rivals"] = SerializeBasicVector(rivals);
std::vector<double> scores = {48.9, 52.5, 60.3};
record["scores"] = SerializeBasicVector(scores);
// Stores the serialized string.
dbm.Set("john", SerializeStrMap(record));
// Retrieves the serialized string and restore it.
std::string serialized;
std::map<std::string, std::string> restored;
if (dbm.Get("john", &serialized).IsOK()) {
restored = DeserializeStrMap(serialized);
}
// Shows the restored content.
std::cout << "name: " << restored["name"] << std::endl;
std::cout << "id: " <<
DeserializeBasicValue<int32_t>(restored["id"]) << std::endl;
std::cout << "rating: " <<
DeserializeBasicValue<double>(restored["rating"]) << std::endl;
for (const auto& value : DeserializeStrVector(restored["medals"])) {
std::cout << "medals: " << value << std::endl;
}
for (const auto& value :
DeserializeBasicVector<int32_t>(restored["rivals"])) {
std::cout << "rivals: " << value << std::endl;
}
for (const auto& value :
DeserializeBasicVector<double>(restored["scores"])) {
std::cout << "scores: " << value << std::endl;
}
// Closes the database.
dbm.Close();
return 0;
}
// END OF FILE
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