Introducing the Problem Domain

Identifying Current Factoring of an Application

Identifying Refactoring Targets

Summary

How Did the Application Become This Bad

Understanding Importance of Proper Naming

Defining the Project Structure

Implementing the Project Structure

The Case in Favor of Using Refactoring Tools

Naming Classes After Concepts They Model

Naming Classes After Behavior They Offer

Summary

Identifying the Need to Decouple Function Calls

Null Object Pattern as a Strategy

Implementing Stateful Strategies

Refactoring Tightly Coupled Calls to the Strategy Pattern

Summary

Understanding the Composite Pattern

Identifying the Need to Group Equally-typed Strategies

Chaining Strategies with Composite Pattern

Understanding the Decorator Pattern

Summary

Wrapping Strategies with the Decorator Pattern

Identifying the Need for a Builder

Designing the Builder

Preparing Ground for the Builder

Summary

A Word about Structuring Namespaces

Identifying Infrastructural Concerns

Introducing the Infrastructure Layer

Moving Infrastructural Code to Another Layer

Isolating Infrastructural Code

Summary

Identifying the Domain Rules

Preparing Room for Explicit Rules

Implementing the Rules

Constructing Composite Rules

Wrapping Rules into a Rule Adapter

Summary

Introducing the Visitor Design Pattern

Identifying the Need for Unrelated Behaviors

Building Structural Inspection on the Visitor Idea

Implementing the Structural Inspection Visitor

Summary

Implementing the Concrete Visitor

Pushing the Rules System to Its Extreme

Extending the Rules System

Summary

Adding Features to the Domain

Course Summary