DataTable SubTable

@Named
@RequestScoped
public class SubTableView {

    private List<Team> teams;

    @PostConstruct
    public void init() {
        teams = new ArrayList<Team>();
        Team lakers = new Team("Los Angeles Lakers");
        lakers.getStats().add(new Stats("2005-2006", 50, 32));
        lakers.getStats().add(new Stats("2006-2007", 44, 38));
        lakers.getStats().add(new Stats("2007-2008", 40, 42));
        lakers.getStats().add(new Stats("2008-2009", 45, 37));
        lakers.getStats().add(new Stats("2009-2010", 48, 34));
        lakers.getStats().add(new Stats("2010-2011", 42, 42));
        teams.add(lakers);

        Team celtics = new Team("Boston Celtics");
        celtics.getStats().add(new Stats("2005-2006", 46, 36));
        celtics.getStats().add(new Stats("2006-2007", 50, 32));
        celtics.getStats().add(new Stats("2007-2008", 41, 41));
        celtics.getStats().add(new Stats("2008-2009", 45, 37));
        celtics.getStats().add(new Stats("2009-2010", 38, 44));
        celtics.getStats().add(new Stats("2010-2011", 35, 47));
        teams.add(celtics);
    }

    public List<Team> getTeams() {
        return teams;
    }
}

public class Team implements Serializable {

    private static final long serialVersionUID = 1L;

    private String name;

    private List<Stats> stats;

    public Team() {
        stats = new ArrayList<Stats>();
    }

    public Team(String name) {
        this.name = name;
        stats = new ArrayList<Stats>();
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public List<Stats> getStats() {
        return stats;
    }

    public void setStats(List<Stats> stats) {
        this.stats = stats;
    }

    public int getAllWins() {
        int sum = 0;

        for (Stats s : stats) {
            sum += s.getWin();
        }

        return sum;
    }

    public int getAllLosses() {
        int sum = 0;

        for (Stats s : stats) {
            sum += s.getLoss();
        }

        return sum;
    }
}

public class Stats implements Serializable {

    private static final long serialVersionUID = 1L;

    private String season;

    private int win;

    private int loss;

    public Stats() {
        // default constructor
    }

    public Stats(String season, int win, int loss) {
        this.season = season;
        this.win = win;
        this.loss = loss;
    }

    public int getWin() {
        return win;
    }

    public void setWin(int win) {
        this.win = win;
    }

    public int getLoss() {
        return loss;
    }

    public void setLoss(int loss) {
        this.loss = loss;
    }

    public String getSeason() {
        return season;
    }

    public void setSeason(String season) {
        this.season = season;
    }
}