Nov
30
2009
QJson: easier serialization of QObject instances to JSON
Posted by Flavio in C++, KDE, Qt, UncategorizedI have just committed into trunk a couple of changes that make easier to serialize a QObject instance to JSON.
This solution relies on the awesome Qt’s property system.
Suppose the declaration of Person class looks like this:
class Person : public QObject
{
Q_OBJECT
Q_PROPERTY(QString name READ name WRITE setName)
Q_PROPERTY(int phoneNumber READ phoneNumber WRITE setPhoneNumber)
Q_PROPERTY(Gender gender READ gender WRITE setGender)
Q_PROPERTY(QDate dob READ dob WRITE setDob)
Q_ENUMS(Gender)
public:
Person(QObject* parent = 0);
~Person();
QString name() const;
void setName(const QString& name);
int phoneNumber() const;
void setPhoneNumber(const int phoneNumber);
enum Gender {Male, Female};
void setGender(Gender gender);
Gender gender() const;
QDate dob() const;
void setDob(const QDate& dob);
private:
QString m_name;
int m_phoneNumber;
Gender m_gender;
QDate m_dob;
};
The following code will serialize an instance of Person to JSON:
Person person;
person.setName("Flavio");
person.setPhoneNumber(123456);
person.setGender(Person::Male);
person.setDob(QDate(1982, 7, 12));
Serializer serializer;
qDebug() << serializer.serialize( &person);
The generated output will be:
{ "dob" : "1982-07-12", "gender" : 0, "name" : "Flavio", "phoneNumber" : 123456 }
I hope you will find this new feature useful. I'm also considering to create a similar method inside the Parser class.
As usual suggestions are welcome.
Tags: KDE, qjson, Qt
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