i want to make pgId and pgName both as composite key where both pgId anf pgName are assgined values. i am not sure how should i go about it? on net i get examples where composite key column refering to column of some other table but not this kind of scenario?

@Entity
@Table(name = "PersonDetails")
public class PersonDetailsData implements Serializable {
  private static final long serialVersionUID    = 1L;

  @Id
  @Basic
  private int               pgId;

  @Basic(optional = true)
  @Column(nullable = true)
  private int               orgId;

  @Basic(optional = true)
  @Column(nullable = true)
  private String            pgName;


   public PersonWikiDetailsData() {
  }

  public int getPpId() {
    return ppId;
  }

  public void setPpId(int ppId) {
this.ppId = ppId;
  }

  public String getSpaceName() {
return spaceName;
  }

  public void setSpaceName(String spaceName) {
this.spaceName = spaceName;
  }

  }