1. Fundamental Base: The Problem and the Theory

1.1 Introduction

The Adapter Pattern (also widely known by its alias, Wrapper) belongs to the Structural Design Patterns category. Structural patterns deal with object composition, establishing clean relationships and interfaces across disparate classes to form larger, flexible structures without introducing tight coupling.

According to the canonical definition by the Gang of Four (GoF):

"Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces." (Gamma et al., 1994).