Methodology for validating software metrics
The denominator is the total number of attributes defined in the project The Method Hiding Factor is a fraction where the numerator is the sum of the invisibilities of all methods defined in all classes.
"Encapsulation means that all that is seen of an object is its interface, namely the operations we can perform on the object ."Information hiding is a theoretical technique that indisputably proven its value in practice.
"Large programs that use information hiding have been found to be easier to modify -- by a factor of 4 -- than programs that don't The Attribute Hiding Factor measures the invisibilities of attributes in classes.
Inheritance-based couplings arise as derived classes (subclasses) inherit methods and attributes form its base class () the more difficult it is to understand individual artifacts, and hence to correctly maintain or enhance them; (ii) the larger the sensitivity of (unexpected) change and defect propagation effects across artifacts; and (iii) consequently, the more testing required to achieve satisfactory reliability levels.
Additionally, excessive coupling between objects is detrimental to modular design and prevents reuse. Cohesion refers to how closely the operations in a class are related to each other.
Classes with low cohesion could probably be subdivided into two or more subclasses with increased cohesion.
This metric evaluates the design implementation as well as reusability. Information hiding gives rise to encapsulation in object-oriented languages.