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Howto Persist a Map<Entity, Integer> with JPA?

@Entity

class PerformanceRating{

....

....

@ManyToMany(fetch = FetchType.EAGER)

@JoinTable(name = "performance_rating_progress_reward", joinColumns = { @JoinColumn(name = "id", nullable = false, updatable = false) }, inverseJoinColumns = { @JoinColumn(name = "amount", nullable = false, updatable = false) })

public Map<Progress, Integer> getRewardAmountByProgressMap() {

    return this.rewardAmountByProgressMap;

}

       

Use of @OneToMany or @ManyToMany targeting an unmapped class: fwl.domain.model.PerformanceRating.rewardAmountByProgressMap[java.lang.Integer]

       

rating

============

id               int(11) PK

       

progress

============

id               int(11) PK

amount           int(11)

       

progress_has_rating

============

progress_id      int(11) PK

rating_id        int(11) PK

       

@Entity @Table class Rating {

  @Id long id;

  @ManyToMany(targetEntity = Progress.class,

              cascade = CascadeType.ALL,

              fetch = FetchType.EAGER)

  @JoinTable(name = "progress_has_rating",

             joinColumns = {@JoinColumn(name = "rating_id",

                                        referencedColumnName = "id")},

             inverseJoinColumns = {@JoinColumn(name = "progress_id",

                                               referencedColumnName = "id")})

  Set<Progress> progresses;

}

 

@Entity class Progress {

  @Id long id;

  @Basic long amount;

}