JSF and DTO classes

Question

Hello,
I am interested in the following situation. I have 2 database tables and corresponding DTO and DAO classes. Here are the DTO classes:
public class DTO1 {
    private int column1;
    private String column2;
    private String column3;
    private int fk1;
    /* getters, setters*/
public class DTO2 {
    private int id;
    private String name1;
    private String columnX;
    private String columnY;
    /* getters, setters*/
}Suppose that we want to execute the following query:
SELECTt1.column1, t1.column2, t1.column3, t2.name FROMDTO1 t1, DTO2 t2 WHERE t1.fk1 = t2.id;What's right to do?
Should I extend DTO1 class and add another field, e.g.
public class DTO1Extended extends DTO1{
    private String name;
    /* getters, setters*/
}and then use this extended model together with base model in my DAO class?
Or, should I add this name field in my base model class, e.g.:
public class DTO1 {
    private int column1;
    private String column2;
    private String column3;
    private int fk1;
    private String name;
    /* getters, setters*/
}I think that the first approach is more OO.
Or, maybe, there is some other (better) solution?
What would some persistence framework, like Hibernate, done to resolve this situation?

Answer 1

Already answered in the other thread which you hijacked: [http://forums.sun.com/thread.jspa?threadID=5360009].