QJson::QObjectHelper Class Reference

Class used to convert QObject into QVariant and vivce-versa. During these operations only the class attributes defined as properties will be considered. Properties marked as 'non-stored' will be ignored. More...

#include <qobjecthelper.h>

List of all members.

Static Public Member Functions
static QVariantMap	qobject2qvariant (const QObject *object, const QStringList &ignoredProperties=QStringList(QString(QLatin1String("objectName"))))
static void	qvariant2qobject (const QVariantMap &variant, QObject *object)

---

Detailed Description

Class used to convert QObject into QVariant and vivce-versa. During these operations only the class attributes defined as properties will be considered. Properties marked as 'non-stored' will be ignored.

Suppose the declaration of the 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));

    QVariantMap variant = QObjectHelper::qobject2qvariant(&person);
    Serializer serializer;
    qDebug() << serializer.serialize( variant);

The generated output will be:

    { "dob" : "1982-07-12", "gender" : 0, "name" : "Flavio", "phoneNumber" : 123456 }

It's also possible to initialize a QObject using the values stored inside of a QVariantMap.

Suppose you have the following JSON data stored into a QString:

    { "dob" : "1982-07-12", "gender" : 0, "name" : "Flavio", "phoneNumber" : 123456 }

The following code will initialize an already allocated instance of Person using the JSON values:

    Parser parser;
    QVariant variant = parser.parse(json);

    Person person;
    QObjectHelper::qvariant2qobject(variant.toMap(), &person);

See also:

Parser

Serializer

Definition at line 116 of file qobjecthelper.h.

---

Member Function Documentation

QVariantMap QObjectHelper::qobject2qvariant ( const QObject *  object, const QStringList &  ignoredProperties = QStringList(QString(QLatin1String("objectName")))  )

static

This method converts a QObject instance into a QVariantMap.

Parameters:

object	The QObject instance to be converted.
ignoredProperties	Properties that won't be converted.

Definition at line 44 of file qobjecthelper.cpp.

void QObjectHelper::qvariant2qobject ( const QVariantMap &  variant, QObject *  object  )

static

This method converts a QVariantMap instance into a QObject

Parameters:

variant	Attributes to assign to the object.
object	The QObject instance to update.

Definition at line 63 of file qobjecthelper.cpp.

---

The documentation for this class was generated from the following files:

• /home/flavio/hacking/qjson/src/qobjecthelper.h
• /home/flavio/hacking/qjson/src/qobjecthelper.cpp