Contents
‘Hidden’ dependencies arise when two classes, linked structurally, do not share the same semantic namespace or when semantically dependent classes do not share a structural link.
Does dependency injection break encapsulation?
Thus, the dependency is only “seen” by the composition root. The composition root’s single responsibility is to wire these dependencies together. So using constructor injection does not break any encapsulation.
Why is it good to use OOP in an application?
OOP encapsulates data by default; objects contain both the data and the methods that affect that data, and good OOP practice means you provide getter and setter methods to control access to that data. This protects mutable data from being changed willy nilly, and makes application data safer.
Why are dependencies important in object oriented design?
Understanding dependencies is important when doing object oriented design of API’s and applications. However, in my opinion the subject could be investigated further than many books do. That is the purpose of this text. If you are an experienced OO developer you may already know much or all of what is written here.
Why is inheritance not a uniquely OOP feature?
In any case, it is not uniquely a OOP feature and can be done with modules isolating a system function or a set of data and operations on those data within a module. Inheritance. Because objects can be created as subtypes of other objects, they can inherit variables and methods from those objects.
Why is Abstraction considered to be an OOP feature?
Abstraction is a complementary conceptto encapsulation here; where encapsulation hides internal information, abstraction provides an easier-to-use public interface to data. In any case, it is not uniquely a OOP feature and can be done with modules isolating a system function or a set of data and operations on those data within a module.