April 05
Prof. Ismael H. F. Santos
- ismael@tecgraf.puc-rio.br
2
Instantiate a UserDao Object
in Application Code
UserDao userDao;
...
public void setUserDao( UserDao userDao) {
this.userDao = userDao;
}
nNo more dependency on a specific implementation of the DAO. But
who will call the setter?
nInversion of Control
(IoC)
nThe
application code is no longer responsible for instantiate an interface with a specific implementation, A.K.A. Dependency Injection
