The Decorator Pattern, Functionalized

Decorator is a classic “wrap an object to add behavior” pattern. In Clojure, the same move is usually wrapping a function with another function.

This section covers practical functional decorators: middleware chains, interceptors, and small wrappers that add logging, validation, caching, timing, or authorization without changing the core logic.

For Java engineers, it’s the same intent as Decorator—just with fewer moving parts and clearer composition.

In this section

• Understanding the Traditional Decorator Pattern in Object-Oriented Design
  Explore the traditional Decorator pattern in object-oriented design, its structure, applications, and how it can be translated into functional programming paradigms.
• Functional Equivalent of the Decorator Pattern in Clojure
  Explore how to implement the Decorator pattern in Clojure using higher-order functions, enhancing functionality with logging, validation, and other cross-cutting concerns.
• Clojure's Functional Decorator Pattern Benefits
  Explore the simplicity and elegance of implementing the Decorator Pattern in Clojure, highlighting its functional approach, reduced code complexity, and enhanced composition capabilities.