コレクション間でエンティティを結合

import com.mongodb.hibernate.annotations.ObjectIdGenerator;
import org.bson.types.ObjectId;
import java.time.Instant;
import java.util.List;
import jakarta.persistence.Embedded;
import jakarta.persistence.Entity;
import jakarta.persistence.FetchType;
import jakarta.persistence.Id;
import jakarta.persistence.OneToMany;
import jakarta.persistence.Table;
@Entity
@Table(name = "movies")
public class Movie {
   @Id
   @ObjectIdGenerator
   private ObjectId id;
   private String title;
   private String plot;
   private int year;
   private List<String> cast;
   private List<String> directors;
   private Instant released;
   @Embedded
   private Awards awards;
   @OneToMany(mappedBy = "movie", fetch = FetchType.LAZY)
   private List<Comment> comments;
   public Movie(String title, String plot, int year, List<String> cast, List<String> directors, Instant released, Awards awards) {
      this.title = title;
      this.plot = plot;
      this.year = year;
      this.cast = cast;
      this.directors = directors;
      this.released = released;
      this.awards = awards;
   }
   public Movie() {
   }
   public ObjectId getId() {
      return id;
   }
   public String getTitle() {
      return title;
   }
   public void setTitle(String title) {
      this.title = title;
   }
   public String getPlot() {
      return plot;
   }
   public void setPlot(String plot) {
      this.plot = plot;
   }
   public int getYear() {
      return year;
   }
   public void setYear(int year) {
      this.year = year;
   }
   public List<String> getCast() {
      return cast;
   }
   public void setCast(List<String> cast) {
      this.cast = cast;
   }
   public List<String> getDirectors() {
      return directors;
   }
   public void setDirectors(List<String> directors) {
      this.directors = directors;
   }
   public Awards getAwards() {
      return awards;
   }
   public void setAwards(Awards awards) {
      this.awards = awards;
   }
   public Instant getReleased() {
      return released;
   }
   public void setReleased(Instant released) {
      this.released = released;
   }
   public List<Comment> getComments() {
      return comments;
   }
   public void setComments(List<Comment> comments) {
      this.comments = comments;
   }
}

package org.example;
import com.mongodb.hibernate.annotations.ObjectIdGenerator;
import jakarta.persistence.Column;
import org.bson.types.ObjectId;
import java.time.Instant;
import jakarta.persistence.Entity;
import jakarta.persistence.FetchType;
import jakarta.persistence.Id;
import jakarta.persistence.JoinColumn;
import jakarta.persistence.ManyToOne;
import jakarta.persistence.Table;
@Entity
@Table(name = "comments")
public class Comment {
    @Id
    @ObjectIdGenerator
    @Column(name = "_id")
    private ObjectId id;
    private String name;
    private String email;
    private String text;
    private Instant date;
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "movie_id")
    private Movie movie;
    public Comment(String name, String email, String text, Instant date, Movie movie) {
        this.name = name;
        this.email = email;
        this.text = text;
        this.date = date;
        this.movie = movie;
    }
    public Comment() {
    }
    public ObjectId getId() {
        return id;
    }
    public void setId(ObjectId id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public String getText() {
        return text;
    }
    public void setText(String text) {
        this.text = text;
    }
    public Instant getDate() {
        return date;
    }
    public void setDate(Instant date) {
        this.date = date;
    }
    public Movie getMovie() {
        return movie;
    }
    public void setMovie(Movie movie) {
        this.movie = movie;
    }
}

package org.example;
import com.mongodb.hibernate.annotations.ObjectIdGenerator;
import jakarta.persistence.Column;
import org.bson.types.ObjectId;
import jakarta.persistence.Entity;
import jakarta.persistence.Id;
import jakarta.persistence.Table;
@Entity
@Table(name = "users")
public class User {
    @Id
    @ObjectIdGenerator
    @Column(name = "_id")
    private ObjectId id;
    private String name;
    private String email;
    public User(String name, String email) {
        this.name = name;
        this.email = email;
    }
    public User() {
    }
    public ObjectId getId() {
        return id;
    }
    public void setId(ObjectId id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
}