Our next exercise is to create a serializer of the same PlayerInfo structure as we used for the XML exercise, but this time the destination data format is going to be JSON.
Start by creating a PlayerInfoJSON class and give it an interface similar to the one shown in the following code:
class PlayerInfoJSON {
public:
PlayerInfoJSON(){}
QByteArray writePlayerInfo(const PlayerInfo &pinfo) const;
};All that is really required is to implement the writePlayerInfo method. This method will use QJsonDocument::fromVariant() to perform the serialization; thus, what we really have to do is convert our player data to a variant. Let's add a protected method to do that:
QVariant PlayerInfoJSON::toVariant(const PlayerInfo &pinfo) const {
QVariantList players;
foreach(const Player &p, pinfo.players) players << toVariant(p);
return players;
}Since the structure is really a list of players, we can iterate the list of players, serialize...