Data selection and report generation

Question

Hi,
I want to create a report with information about friends. I have a class like this:
public class friend(){
Date born;
Vector phones;
String name;
I have a collection of friends and I want generate a report with some of them. I want to select those friends that verify some restrictions like this:
- Friends with a born date in a range (ej: from 1960 to 1965)
- Friends with the same work phone
- etc.
My solutions is anything like this:
class FriendFilter(){
Friend from_friend;
Friend to_friend;
boolean filter_born=false; // To say if may be aplicated the filter
boolean filter_phone=false;
My question is if there are any pattern for this. Is this solution the best one?
Thank you in advance.

Answer 1

The filter class might look a little different. You need to pass the collection of Friend objects to the filter class. And then you can have the query methods that filter the Friend objects.
public class FriendFilter {
private Collection friends;
FriendFilter(Collection f) {
this.friends = f;
public Collection sortByBirthYear(int beginYear, int endYear) {
public Collection sortByPhoneNumber(int phoneNum) {
}