在jpa 1.0@idclass实现中,将冗余列属性与关联同步是否被视为最佳做法?

考虑下表:

CREATE TABLE Participations
(
  roster_id INTEGER NOT NULL,
  round_id INTEGER NOT NULL,
  ordinal_nbr SMALLINT NOT NULL ,
  was_withdrawn BOOLEAN NOT NULL,
  PRIMARY KEY (roster_id, round_id, ordinal_nbr),
  CONSTRAINT participations_rosters_fk FOREIGN KEY (roster_id) REFERENCES Rosters (id),
  CONSTRAINT participations_groups_fk FOREIGN KEY (round_id, ordinal_nbr) REFERENCES Groups (round_id , ordinal_nbr)
)

这里是jpa 1.0@idclass实体类:

@Entity
@Table(name = "Participations")
@IdClass(value = ParticipationId.class)
public class Participation implements Serializable
{
    @Id
    @Column(name = "roster_id", insertable = false, updatable = false)
    private Integer rosterId;

    @Id
    @Column(name = "round_id", insertable = false, updatable = false)
    private Integer roundId;

    @Id
    @Column(name = "ordinal_nbr", insertable = false, updatable = false)
    private Integer ordinalNbr;

    @Column(name = "was_withdrawn")
    private Boolean wasWithdrawn;

    @ManyToOne
    @JoinColumn(name = "roster_id", referencedColumnName = "id")
    private Roster roster = null;

    @ManyToOne
    @JoinColumns(value = {@JoinColumn(name = "round_id", referencedColumnName = "round_id"), @JoinColumn(name = "ordinal_nbr", referencedColumnName = "ordinal_nbr")})
    private Group group = null;

    public Participation()
    {
    }

    public Integer getRosterId()
    {
        return rosterId;
    }

    public void setRosterId(Integer rosterId)
    {
        this.rosterId = rosterId;
    }

    public Integer getRoundId()
    {
        return roundId;
    }

    public void setRoundId(Integer roundId)
    {
        this.roundId = roundId;
    }

    public Integer getOrdinalNbr()
    {
        return ordinalNbr;
    }

    public void setOrdinalNbr(Integer ordinalNbr)
    {
        this.ordinalNbr = ordinalNbr;
    }

    public Boolean getWasWithdrawn()
    {
        return wasWithdrawn;
    }

    public void setWasWithdrawn(Boolean wasWithdrawn)
    {
        this.wasWithdrawn = wasWithdrawn;
    }

    public Roster getRoster()
    {
        return roster;
    }

    // ???
    public void setRoster(Roster roster)
    {
        this.roster = roster;
    }

    public Group getGroup()
    {
        return group;
    }

    // ???
    public void setGroup(Group group)
    {
        this.group = group;
    }

    ...
}

一般来说,关联设置器是否应该与冗余字段(这里是rosterid、roundid和ordinalnbr)同步?:

    // ???
    public void setGroup(Group group)
    {
        this.group = group;
        this.roundId = group.getRoundId();
        this.ordinalNbr = group.getOrdinalNbr();
    }

谢谢