AdvSE

Advanced Software Engineering | Design Patterns

Singleton pattern

The singleton pattern is a design pattern that restricts the instantiation of a class to one object.

Factory pattern

Define an interface for creating an object, but let subclasses decide which class to instantiate. The Factory method lets a class defer instantiation it uses to subclasses.

Builder pattern

Separate the construction of a complex object from its representation so that the same construction process can create different representations.

Adapter pattern

Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn’t otherwise because of incompatible interfaces.

Decorator pattern

Attach additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality.

Chain of Responsibility pattern

Avoid coupling the sender of a request to its receiver by giving more than one object a chance to handle the request. Chain the receiving objects and pass the request along the chain until an object handles it.

Iterator pattern

Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation.

Observer pattern

Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically.

Strategy pattern

Define a family of algorithms, encapsulate each one, and make them interchangeable. Strategy lets the algorithm vary independently from clients that use it.