Hands-On Design Patterns with Java

University email handler interface

The UniversityEmailHandler interface has two methods. The first method, setNextEmailHandler(), accepts a UniversityEmailHandler argument, which will be the next handler in the chain of authority. The second method, processEmailHandler(), is used if the email is processed by the current handler:

public interface UniversityEmailHandler { public void setNextEmailHandler(UniversityEmailHandler emailHandler);    public void processEmailHandler(String emailText);}

The preceding code explains the handler interface.