How This Course Is Structured

Understanding the Role of Design Patterns

The First Attempt to Decorate a Class

Motivation for the Decorator Pattern

Summary

The Downfall of the Subclassing Decorator

Using Object Composition Instead of Inheritance

Advancing from Decorator to Adapter Pattern

Implementing a Transparent Adapter

Limiting the Role of Adapters

Towards a Heavyweight Adapter

Implementing the Strategy Pattern

Understanding the Need for Flexibility

Implementing Strategies via the Interface

Augmenting the Strategy Interface

Implementing Strategies with Strategies

Strategies in the .NET Framework

Summary

Understanding the Limitations of the Abstract Factory

Understanding the Need for Abstract Factory Pattern

Attempting to Overcome the Limitations

Implementing Concrete Factories

Summary

Completing the Concrete Factories

Demonstrating the Concrete Factories

From Abstract Factory to Factory Method

Holding State Behind a Factory Method

Fixing Parameters with Factory Method

Confining Propagation of Change with Factory Methods

Currying Factory Methods

Summary

Understanding Limitations of Factories

Replacing Factory with Builder

Adding Validation to the Builder

Handling Variation and Optional Components

Building a Factory Method

Understanding the Need for a Consistent Builder

Building a Graph of Objects

Designing a Consistent Builder

Adding Alternatives to a Consistent Builder

Shameless Immutability in Builders

Designing an Immutable Builder

Designing a Fluent Builder

Understanding Multitudes of Objects

Inventing the Composite Element

Understanding Recursive Nature of Composites

Combining Composite and Factory Methods

Reversing Composites Representing One Element as Many

Combining Composite and Abstract Factory