OOP.md

Behavioural

Chain of responsibility

• pass a request down a chain of objs until one handles the request.
• handler objs either handle or forward a request.

Creation

Abstract Factory

• an interface for creating different groups of related or dependant objects.

interface «AbstractFactory» {
    public function createObjectA(): ClassA;
    public function createObjectB(): ClassB;
 }

• eg. «ElementFactory» -> «DomElementFactory», «HtmlElementFactory»

Builder

• an interface for a construction process to create different complex objects.

interface «Builder» {
    public function getComplexObject(): ClassC;
    public function buildObjectA();
    public function buildObjectB();
 }

Structures

Decorator

• add responsibility to an obj dynamically
• extend functionality of an obj

Terms

:dynamically: at run-time.