SunRain

#include <QObject>
#include <QDebug>

class FactoryBase
{
public:
    virtual QObject* create() = 0;
};

QMap<QString, FactoryBase*> factoryMap;

SunRain

http://kunalmaemo.blogspot.com/2010/07/creating-class-dynamically-from-its.html


Some time it could be useful to be able to create new instance of class just by knowing its name. Such as in situation like when you are receiving XML from network and you want to create certain type of parser depending upon XML received from network.

In Qt its possible by using Qt's meta object system.

Here is my sample implementation that uses QMetaType to achieve the same. In sample code Parser is base class of all parser.

class Parser

SunRain

http://bbs.csdn.net/topics/340251573?page=2

http://bbs.csdn.net/topics/390480286

SunRain

#include <map>
#include <string>
#include <iostream>

namespace MyNameSpace {
class Base
{
public:
    virtual char* GetName() const = 0;
};