DesignPatterns

Repository for assignments, examples, and project for the CS 542 Design Patterns class from CSUSM

Concept:

Design Patterns are descriptions of communicating objects and classes that are customized to solve a general design problem in a particular context.

Design Pattern is a general repeatable solution to a commonly occurring problem in software design, a description for how to solve a problem that can be customizable.

Design Techniques:

1. Favor composition over inheritance to promote encapsulation - instead of creating child classes

2. Use interface classes for providing a common interface. Program through interface, not in the concrete level. Refer through the interface, not directly.

Classification by Purpose:

1. Creational Patterns: for object creation

2. Structural Patterns: for compositions of classes and objects

3. Behavioral Patterns: for interactions of classes and objects

Each pattern has 4 essential elements:

• name
• problem (application scope, what type of problem it addresses),
• solution (how this DP works),
• consequences (costs, limitations, and benefits)

Folder Structure: Concept + Code example + Diagram

Disclosure

All information is based on my class notes and slides. I copied it here for my future reference. For more reliable sources, please check the book cited on reference.

Reference

E. Gamma, R. Helm, Ralph E. Johnson, J. Vlissides. Design patterns: elements of reusable object-oriented software. Addison-Wesley Professional, 1995.