I want to apply the adapter design pattern.

There is a system that delivers notifications to its users. The Notification interface is as below:

public interface Notification {

void setRecipient(User recipient);

void setSender(User sender);

void setMessage(String message);

String getMessage();

}

And the User interface looks like the following:

public interface User {

String getName();

String getMobileNumber();

Notification getPreferredContact();

}

This code was written to implement the Notification interface for in-system messages using a class InternalNotification. They would like to expand the system to SMS notifications and purchased code that will send SMS messages. That interface for an SMS message is :

public interface SmsMessage {

public void setSender(String phoneNumber);

public void setRecipient(String phoneNumber);

public void setMessageBody(byte[] data);

public byte[] getMessageBody();

}

I want to implement a class SmsToNotificationAdapter that lets the system use SMS messages to notify its users.