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A simple class for parsing JSON data into a QVariant hierarchy and vice versa.
License: Other
This project forked from qt-json/qt-json
A simple class for parsing JSON data into a QVariant hierarchy and vice versa.
License: Other
######################################################################## 1. INTRODUCTION The Json class is a simple class for parsing JSON data into a QVariant hierarchies. Now, we can also reverse the process and serialize QVariant hierarchies into valid JSON data. ######################################################################## 2. HOW TO USE The parser is really easy to use. Let's say we have the following QString of JSON data: ------------------------------------------------------------------------ { "encoding" : "UTF-8", "plug-ins" : [ "python", "c++", "ruby" ], "indent" : { "length" : 3, "use_space" : true } } ------------------------------------------------------------------------ We would first call the parse-method: ------------------------------------------------------------------------ //Say that we're using the QtJson namespace using namespace QtJson; bool ok; //json is a QString containing the JSON data QVariantMap result = Json::parse(json, ok).toMap(); if(!ok) { qFatal("An error occurred during parsing"); exit(1); } ------------------------------------------------------------------------ Assuming the parsing process completed without errors, we would then go through the hierarchy: ------------------------------------------------------------------------ qDebug() << "encoding:" << result["encoding"].toString(); qDebug() << "plugins:"; foreach(QVariant plugin, result["plug-ins"].toList()) { qDebug() << "\t-" << plugin.toString(); } QVariantMap nestedMap = result["indent"].toMap(); qDebug() << "length:" << nestedMap["length"].toInt(); qDebug() << "use_space:" << nestedMap["use_space"].toBool(); ------------------------------------------------------------------------ The previous code would print out the following: ------------------------------------------------------------------------ encoding: "UTF-8" plugins: - "python" - "c++" - "ruby" length: 3 use_space: true ------------------------------------------------------------------------ To write JSON data from Qt object is as simple as parsing: ------------------------------------------------------------------------ QVariantMap map; map["name"] = "Name"; map["age"] = 22; QByteArray data = Json::serialize(map); ------------------------------------------------------------------------ The byte array 'data' contains valid JSON data: ------------------------------------------------------------------------ { name: "Luis Gustavo", age: 22, } ------------------------------------------------------------------------ ######################################################################## 4. CONTRIBUTING The code is available to download at GitHub. Contribute if you dare!
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