This repository is based on Sergey Pupko's QtDependencyResolver which can be found here, but with additional Scope capability just like Google Guice's Scope. Until now, just Singleton Scope was added. But, additional Scope will be added another time if needed.
QtDependencyResolver is a simple, ready-to-use library, that provide you ability to make IoC via DIContainer in your solution. DIContainer is based on Qt Meta-Object System and use invoke method to make a constructor injection.
You can bind your interfaces and base classes to a concrete implementation and retrieve instances later.
To bind your classes you must create a DIContainer instance and use the Bind method:
DIContainer* resolver = new DIContainer();
resolver->Bind<IUsersService, LocalUsersService>();
resolver->Bind<IUsersRepository, MongoDBUsersRepository>();
Bind method receives 1 optional parameter with type of DIContainer::Scope. Currently, there are two available DIContainer::Scope:
`DIContainer::NO_SCOPE`
`DIContainer::SINGLETON`
By default, Bind will use DIContainer::NO_SCOPE if no Scope specified, which means every DIContainer resolve will return another new object.
By passing DIContainer::Singleton Scope, we will make sure the object resolved by DIContainer will always return the same object (Singleton):
DIContainer* resolver = new DIContainer();
resolver->Bind<IUsersService, LocalUsersService>(DIContainer::SINGLETON);
resolver->Bind<IUsersRepository, MongoDBUsersRepository>(DIContainer::SINGLETON);
Then for resolving your interfaces or base classes you must use the Resolve method:
IUserService* userService = resolver->Resolve<IUsersService>();
Note: Only constructors that are declared with the Q_INVOKABLE modifier are made available to be invoked using QMetaObject::invokeMethod() through the meta-object system. For more details look on DIContainerTest.cpp in DependencyResolver-Tests library.
https://github.com/setiawanpai/QtDependencyResolver (Git Repository)
https://github.com/setiawanpai/QtDependencyResolver/issues (Bug Reports)