import StringComparator;
import Comparator;
import MailMessage;

public class SenderComparator 
    implements Comparator {

    //constructor

    StringComparator comp = new StringComparator();
    String sender1;
    String sender2;
    

    public boolean lessThan(Object first, Object second) {

        sender1 = ((MailMessage)first).getField("sender");
        sender2 = ((MailMessage)second).getField("sender");

        return (comp.lessThan(sender1,sender2));

    }
    
    public boolean equals(Object first, Object second) {

        return (comp.equals(((MailMessage)first).getField("sender"), 
                            ((MailMessage)second).getField("sender")));

    }

}