Object-oriented programming was supposed to unify the perspectives of the programmer and the end user in computer code.While objects capture structure well,they fail to capture system action.DCI is a new way of looking at how to construct object oriented applications,and focuses on creating code that matches the users mental model.DCI is a vision to capture the end user mental model of roles and interactions between them.But the question is： how should this be implemented in practice？Use Qi4j which is an implementation of composite oriented p...
