Adapter.md

Adapter

Description

Adapter pattern allows objects with incompatible interfaces to collaborate. It works as a bridge between two incompatible interfaces, enabling them to work together. This pattern involves a single class which is responsible to join functionalities of independent or incompatible interfaces.

Java Code Example

// Target interface
interface Target {
    void request();
}

// Adaptee class with incompatible interface
class Adaptee {
    void specificRequest() {
        System.out.println("Adaptee's specific request");
    }
}

// Adapter class implementing the target interface and using the adaptee
class Adapter implements Target {
    private Adaptee adaptee;

    public Adapter(Adaptee adaptee) {
        this.adaptee = adaptee;
    }

    @Override
    public void request() {
        adaptee.specificRequest();
    }
}

// Client code
public class Main {
    public static void main(String[] args) {
        // Create an adaptee object
        Adaptee adaptee = new Adaptee();

        // Create an adapter object and pass adaptee to it
        Target adapter = new Adapter(adaptee);

        // Call request method of the adapter
        adapter.request();
    }
}

In this example:

• Target is the target interface with a method request that clients use.
• Adaptee is the adaptee class with a method specificRequest that has an incompatible interface.
• Adapter is the adapter class that implements Target and adapts the interface of Adaptee to the Target interface.
• Main is the client code that demonstrates the usage of the adapter.

When you run the Main class, it will use the Adapter to call the specificRequest method of the Adaptee through the request method of the Target interface, demonstrating how the adapter pattern works by adapting the Adaptee to the Target interface.