QT Reading a JSON file and storing and retriving values - c++

Question

I am trying to read a json file like shown below in QT. Can someone suggest a way to obtain values from json object and store them in separate containers or array such as test_cell2.CELLS[0] or some way so that nesting can also be taken care of and also I can access them easily after parsing the file
"test_cells2" : {
"CELLS" : {
"cell_0" : {
"prettyName" : "cell_1",
"CELLS" : {
"cell_1" : {
"prettyName" : "cell_1",
"type" : "default",
},
},
},
"cell_1" : {
"prettyName" : "cell_1",
"type" : "default",
},
"cell_2" : {
"type" : "text cell ko",
},
"cell_3" : {
"prettyName" : "cell_3",
"type" : "default",
},
"cell_4" : {
"data" : {
"settings" : {
"EXEC_PARAMETERS" : {
"defaultQueue" : "batch",
"environment" : {
"blabla" : "blabla2",
},
},
},
},
"type" : "parallel_test",
},
},
},

Answer 1

Take a look at this function
QJsonDocument::fromJson(QByteArray)
http://doc.qt.io/qt-5/qjsondocument.html#fromJson
Then use QJsonDocument::object() and you can use keys to get your values:
QJsonDocument doc = QJsonDocument::fromJson(QByteArray);
QJsonObject root = doc.object();
foreach(QJsonValue element, root["CELLS"].toArray()){
QJsonObject node = element.toObject();
node["whatEver"];
}

Answer 2

If you Qt Version > 5.5 check QJSonDocument, http://doc.qt.io/qt-5/qjsondocument.html.
An Example:
// Just read it from a file... or copy here
const QString yourJSON = "...";
const QJsonDocument jsonDoc = QJsonDocument::fromJson(yourJSON.toLocal8Bit());
const QVariantMap map = jsonDoc.toVariant().toMap();
To take care of nesting of CELLS inside CELLS, first load your CELLS array:
// Start read your parameter
const QVariant testCells2 = map["test_cells2"].toVariant();
const QVariantList CELLS = testCells2.toList();
// Now, we have a list available CELLS, check one be one
foreach (const QVariant& cell, CELLS) {
const QVariantMap wrapped = cell.toMap();
qDebug() << "Pretty Name: " << wrapped["prettyName"].toString();
qDebug() << "Type: " << wrapped["type"].toString();
const hasList = !wrapped["CELLS"].toList().isEmpty();
qDebug() << "Has child list? << hasList;
if (hasList) {
// Start another loop to check the child list.
}
}