使用3级子类休眠多对多映射

Question

我有以下UML图。

由于它是manyToMany关系，我需要三个表来存储数据：

CREATE TABLE Users(
    idObj BIGINT NOT NULL PRIMARY KEY,
    nome VARCHAR(100),
    nomeUtente VARCHAR(50) NOT NULL,
    password VARCHAR(50) NOT NULL,
    email VARCHAR(50) NOT NULL
);

CREATE TABLE Works(
    idObj BIGINT NOT NULL PRIMARY KEY,
    nrIncarico int,
    annoIncarico int,
    ...
);

CREATE TABLE UsersWorksRel(
    idGiudice BIGINT NOT NULL,
    idIncarico BIGINT NOT NULL,
    FOREIGN KEY (idGiudice) REFERENCES Users(idObj),
    FOREIGN KEY (idIncarico) REFERENCES Works(idObj)
);

在AbstractPO中，我使用了@MappedSuperclass注释，用户也没问题，但是我无法注释Judge类...... 我的想法是使用Judge类与Works具有manyToMany关系，如下所示：

public class Judge extends UserPO{

   private List<Works> incarichi;

   public Judge () {
        setTipo(TipologiaUtente.GIUDICE);
   }

   @ManyToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
   @JoinTable(name = "UsersWorksRel", joinColumns = { 
            @JoinColumn(name = "idGiudice", nullable = false, updatable = false) },
            inverseJoinColumns = { @JoinColumn(name = "idIncarico", nullable = false, updatable = false) })
    public List<Works> getIncarichi() {
        return incarichi;
    }

    public void setIncarichi(List<Works> incarichi) {
        this.incarichi = incarichi;
    }
}