Hi,

I'm trying to override the QDataStream to insert a class into a stream eventually writing it to a file. The >> works however << seems to be broken.

Kindly check and let me know what i'm missing

main
Qt Code: 
  1. int main(int argc, char *argv[])
  2. {
  3. 	QApplication a(argc, argv);
  4.  
  5. 	WorkClass *w = new WorkClass;
  6. 	w->setId(1);
  7. 	w->setWorkname("Hello");
  8.  
  9. 	WorkItemClass *wc1 = new WorkItemClass;
  10. 	wc1->setId(11);
  11. 	wc1->setData("11");
  12.  
  13. 	WorkItemClass *wc2 = new WorkItemClass;
  14. 	wc2->setId(22);
  15. 	wc2->setData("22");
  16.  
  17. 	w->appendItem(wc1);
  18. 	w->appendItem(wc2);
  19.  
  20.  
  21. 	QFile file("test.txt");
  22. 	if(file.open(QIODevice::WriteOnly ))
  23. 	{
  24. 		QDataStream stream;
  25. 		stream.setDevice(&file);
  26. 		stream << w;
  27. 		file.close();
  28. 	}
  29.  
  30. 	WorkClass w2;
  31. 	if(file.open(QIODevice::ReadOnly))
  32. 	{
  33. 		QDataStream stream( &file );
  34. 		stream>>w2;
  35. 		file.close();
  36. 	}
  37.  
  38. 	return a.exec();
  39. }
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workclass.h
Qt Code: 
  1. class WorkClass;
  2. class WorkItemClass;
  3.  
  4. class WorkClass : public QObject
  5. {
  6. 	Q_OBJECT
  7. public:
  8. 	explicit WorkClass(QObject *parent = nullptr);
  9.  
  10. 	QVariant getId() const;
  11. 	void setId(const QVariant &value);
  12.  
  13. 	QString getWorkname() const;
  14. 	void setWorkname(const QString &value);
  15.  
  16. 	QList<WorkItemClass*> getItemList() const;
  17. 	void appendItem( WorkItemClass *value);
  18.  
  19.  
  20. signals:
  21.  
  22. public slots:
  23.  
  24. protected:
  26. 	QString					workname;
  27. 	QList<WorkItemClass*>	itemList;
  28.  
  29. };
  30. QDataStream &operator>>(QDataStream &stream, WorkClass &work);
  31.  
  32. QDataStream &operator<<(QDataStream &stream,const WorkClass &work);
  33.  
  34. class WorkItemClass : public QObject
  35. {
  36. 	Q_OBJECT
  37. public:
  38. 	explicit WorkItemClass(QObject *parent = nullptr);
  39.  
  40. 	int getId() const;
  41. 	void setId(int value);
  42.  
  43. 	QString getData() const;
  44. 	void setData(const QString &value);
  45.  
  46. private:
  47. 	int id;
  48. 	QString data;
  49.  
  50. };
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workclass.cpp
Qt Code: 
  1. QDataStream &operator>>(QDataStream &stream, WorkClass &work)
  2. {
  3.    QVariant variant;
  4.    QString string;
  5.    int		count;
  6.    int id;
  7.  
  8.    stream >> variant;
  9.    work.setId(variant);
  10.  
  11.    stream >> string;
  12.    work.setWorkname(string);
  13.  
  14.    stream >> count;
  15.    for (int i=0; i <count; i++) {
  16. 	   stream >> 	id;
  17. 	   stream >> string;
  18. 	   WorkItemClass *w = new WorkItemClass;
  19. 	   w->setId(id);
  20. 	   w->setData(string);
  21. 	   work.appendItem(w);
  22.    }
  23.  
  24.    return stream;
  25. }
  26.  
  27. QDataStream &operator<<(QDataStream& stream, const WorkClass &work)
  28. {
  29.    stream << work.getId();
  30.    stream << work.getWorkname();
  31.  
  32.  
  33.    stream << work.getItemList().size();
  34.  
  35.    for(int i =0;i<work.getItemList().count();i++)
  36.    {
  37. 	   stream << work.getItemList().at(i)->getId();
  38. 	   stream << work.getItemList().at(i)->getData();
  39.    }
  40.  
  41.    return stream;
  42. }
  43.  
  44.  
  45.  
  46. WorkClass::WorkClass(QObject *parent) : QObject(parent)
  47. {
  48.  
  49. }
  50.  
  51. QVariant WorkClass::getId() const
  52. {
  53. 	return id;
  54. }
  55.  
  56. void WorkClass::setId(const QVariant &value)
  57. {
  58. 	id = value;
  59. }
  60.  
  61. QString WorkClass::getWorkname() const
  62. {
  63. 	return workname;
  64. }
  65.  
  66. void WorkClass::setWorkname(const QString &value)
  67. {
  68. 	workname = value;
  69. }
  70.  
  71. QList<WorkItemClass*> WorkClass::getItemList() const
  72. {
  73. 	return itemList;
  74. }
  75.  
  76. void WorkClass::appendItem(WorkItemClass *value)
  77. {
  78. 	itemList.append(value);
  79. }
  80.  
  81. WorkItemClass::WorkItemClass(QObject *parent) : QObject (parent)
  82. {
  83.  
  84. }
  85.  
  86. int WorkItemClass::getId() const
  87. {
  88. 	return id;
  89. }
  90.  
  91. void WorkItemClass::setId(int value)
  92. {
  93. 	id = value;
  94. }
  95.  
  96. QString WorkItemClass::getData() const
  97. {
  98. 	return data;
  99. }
  100.  
  101. void WorkItemClass::setData(const QString &value)
  102. {
  103. 	data = value;
  104. }
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