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Adapter Design Pattern in Java: Bridging the Gap Between Incompatible Interfaces
Overview
The Adapter design pattern is a structural design pattern that allows objects with incompatible interfaces to collaborate. This pattern works by creating an adapter that acts as a bridge between the objects, converting the interface of one object into another that the client expects.
In this article, we will explore the Adapter pattern through an example in an e-commerce platform that integrates multiple payment gateways with different interfaces.
Problem Statement
Imagine an e-commerce platform that needs to support multiple payment gateways such as PayPal and Stripe. These gateways have different interfaces, and the platform requires a unified interface to interact with all payment processors. Additionally, the platform wants to integrate a new third-party payment gateway, AdvancedPay, which has its own unique interface that is not compatible with the existing system.
If each gateway has a different interface, integrating them directly into the platform will lead to a complex and unmaintainable codebase. The solution is to use the Adapter pattern to standardize the interfaces and make integration seamless.