Adapter Pattern

Adapter Pattern

Category: Software Architecture
Skill Level: Intermediate
Domain: programming, architecture

Overview

The Adapter pattern allows incompatible interfaces to work together by wrapping an interface around an existing class.

Description

The Adapter pattern acts as a bridge between two incompatible interfaces, enabling classes with different interfaces to collaborate. It converts the interface of a class into another interface that clients expect.

Prerequisites

• Object-oriented programming fundamentals
• Interface design principles
• Understanding of SOLID principles

Core Competencies

• Identifying when to use adapter pattern
• Implementing class and object adapters
• Working with existing library interfaces
• Maintaining single responsibility principle

Implementation

class Target:
    def request(self) -> str:
        return "Target: The default target's behavior."

class Adaptee:
    def specific_request(self) -> str:
        return ".eetpadmae eht fo roivaheb laicepS"

class Adapter(Target):
    def __init__(self, adaptee: Adaptee):
        self.adaptee = adaptee

    def request(self) -> str:
        return f"Adapter: (TRANSLATED) {self.adaptee.specific_request()[::-1]}"

Use Cases

• Integrating third-party libraries
• Legacy system integration
• Data format conversions
• API wrapper development

Artifacts

• Adapter implementations for common interfaces
• Interface compatibility layers
• Legacy system wrappers

Related Skills

• Bridge Pattern
• Decorator Pattern
• Facade Pattern