Must Dependency Injection come at the expense of Encapsulation?

Question

If I understand correctly, the typical mechanism for Dependency Injection is to inject either through a class\' constructor or through a public property (member) of the clas

Answer 1

I struggled with this notion as well. At first, the 'requirement' to use the DI container (like Spring) to instantiate an object felt like jumping thru hoops. But in reality, it's really not a hoop - it's just another 'published' way to create objects I need. Sure, encapsulation is 'broken' becuase someone 'outside the class' knows what it needs, but it really isn't the rest of the system that knows that - it's the DI container. Nothing magical happens differently because DI 'knows' one object needs another.

In fact it gets even better - by focusing on Factories and Repositories I don't even have to know DI is involved at all! That to me puts the lid back on encapsulation. Whew!