@Entity
@Table(name = "Container")
public class Container implements Serializable {

   private Integer containerID;
   private Set<ContainerIdentifier> containerIdentifiers;

   @Id
   @GeneratedValue(strategy = GenerationType.IDENTITY)
   @Column(unique = true, nullable = false)
   public Integer getContainerID() {
      return this.containerID;
   }

   public void setContainerID(Integer containerID) {
      this.containerID = containerID;
   }

   @OneToMany(mappedBy = "container", fetch = FetchType.LAZY, cascade = CascadeType.ALL, orphanRemoval = true)
   public Set<ContainerIdentifier> getContainerIdentifiers() {
      return this.containerIdentifiers;
   }

   public void setContainerIdentifiers(
         Set<ContainerIdentifier> containerIdentifiers) {
      this.containerIdentifiers = containerIdentifiers;
   }
}

@Entity
@Table(name="ContainerIdentifiers")
public class ContainerIdentifier implements Serializable {

   private Integer containerIdentifiersID;
   private Container container;

   @Id
   @GeneratedValue(strategy=GenerationType.IDENTITY)
   @Column(unique=true, nullable=false)
   public Integer getContainerIdentifiersID() {
      return this.containerIdentifiersID;
   }

   public void setContainerIdentifiersID(Integer containerIdentifiersID) {
      this.containerIdentifiersID = containerIdentifiersID;
   }

   @ManyToOne(fetch=FetchType.LAZY)
   @JoinColumn(name="containerID", nullable=false)
   public Container getContainer() {
      return this.container;
   }

   public void setContainer(Container container) {
      this.container = container;
   }
}