How to define a JPA "Entity" used to query multiple database tables

Question

While using JPA to access database, I have a need to define a generic "Entity" class to use for query different tables. The reason is I have a lot of non-business tables (reference tables) I need to query. I intend to use Native SQL to do the query. Most query will only return 1 - 3 columns. It is tedious to define many JPA entities only to use them sparsely.
For example, if I have two Native query, and define a JavaBean that has 3 properties, how do I implement this in JPA?
Thanks for your help.
query 1:
select LASTNAME as f1, AGE as f2 from PERSON
query 2:
select zipcode as f1 from LOCATION
package model.uti;
public class SimpleBean {
private String f1;
private String f2;
private String f3;
public SimpleBean() {
public void setF1(String f1) {
this.f1 = f1;
public String getF1() {
return f1;
public void setF2(String f2) {
this.f2 = f2;
public String getF2() {
return f2;
public void setF3(String f3) {
this.f3 = f3;
public String getF3() {
return f3;
}

Answer 1

An @Entity is mapped to a specific table. You can't fill it with totally random data from a collection of tables.
If you want to access data from multiple tables within the one entity, then the JPA spec defines an annotation @SecondaryTable, which allows you to specify a
second table and the join condition.
http://java.sun.com/javaee/5/docs/api/javax/persistence/SecondaryTable.html
The JPA spec talks about this as do most good EJB/JPA books.
-steve-