( Object Oriented Designs )
S = Single Responsibility Principle
O = Opened Closed Principle
L = Liscov Substitution Principle
I = Interface Segregation Principle
D = Dependency Inversion Principle
You mush have Object Oriented Design because
# Of course, object oriented.
# Re-usable
# Can be changed with minimal effort.
# Can be extended without changing existing codes.
HERE ARE BASIC DEFINITION OF SOLID
1. Single Responsibility Principle
Single Responsibility Principle defines :
“THERE SHOULD NEVER BE MORE THAN ONE REASON FOR A CLASS TO CHANGE.”
2. Opened Closed Principle
Opened Closed Principle defines :
“SOFTWARE ENTITIES (CLASSES, MODULES, FUNCTIONS, ETC.) SHOULD BE OPEN FOR EXTENSION, BUT CLOSED FOR MODIFICATION.”
3. Liscov Substitution Principle
Liscov Substitution Principle defines :
“SUBTYPES MUST BE SUBSTITUTABLE FOR THEIR BASE TYPES”
4 . Interface Segregation Principle
Interface Segregation Principle defines :
“CLIENTS SHOULD NOT BE FORCED TO DEPEND UPON INTERFACES THAT THEY DO NOT USE.”
5. Dependency Inversion Principle
Dependency Inversion Principle defines :
“HIGH LEVEL MODULES SHOULD NOT DEPEND UPON LOW LEVEL MODULES. RATHER, BOTH SHOULD DEPEND UPON ABSTRACTIONS.”
There are several kind of Object Oriented Principles such as ---
1. Composition over Inheritance : This says about favoring composition over inheritance.
2. Principle of least knowledge : This says the less your class knows, the better.
3. The Common Closure Principle : This says related classes should be package together
4. The Stable Abstractions Principle : This says the more stable a class is, the more it must consist of abstract class.
