001package model.entity;
002
003import lombok.Getter;
004
005import javax.persistence.*;
006import java.io.Serializable;
007import java.time.Instant;
008import java.util.Objects;
009
010/**
011 * Entità rappresentate una relazione "segui" tra un utente e una sezione
012 */
013@Entity
014public class Follow implements Serializable {
015
016    @Embeddable
017    public static class Id implements Serializable{
018
019        @Getter
020        @Column(name = "user_id", nullable = false)
021        protected int userId;
022
023        @Getter
024        @Column(name = "section_id", nullable = false)
025        protected int sectionId;
026
027        protected Id(){}
028
029        public Id(int userId, int sectionId){
030            this.userId = userId;
031            this.sectionId = sectionId;
032        }
033
034        @Override
035        public boolean equals(Object o) {
036            if (this == o) return true;
037            if (!(o instanceof Id)) return false;
038            Id id = (Id) o;
039            return userId == id.userId && sectionId == id.sectionId;
040        }
041
042        @Override
043        public int hashCode() {
044            return Objects.hash(userId, sectionId);
045        }
046    }
047
048    @Getter
049    @EmbeddedId
050    protected Id id = new Id();
051
052    @Getter
053    @ManyToOne(optional = false) @MapsId("userId")
054    protected User user;
055    public void setUser(User user){
056        this.user = user;
057        this.id.userId = user.getId();
058    }
059
060    @Getter
061    @ManyToOne(optional = false) @MapsId("sectionId")
062    protected Section section;
063    public void setSection(Section section){
064        this.section = section;
065        this.id.sectionId = section.getId();
066    }
067
068    @Getter
069    @Column(nullable = false, updatable = false, insertable = false)
070    protected Instant followDate;
071
072    protected Follow(){}
073
074    public Follow(User user, Section section){
075        this.user = user;
076        this.section = section;
077        this.id = new Id(user.getId(), section.getId());
078    }
079
080
081    @Override
082    public boolean equals(Object o) {
083        if (this == o) return true;
084        if (!(o instanceof Follow)) return false;
085        Follow follow = (Follow) o;
086        return id.equals(follow.id);
087    }
088
089    @Override
090    public int hashCode() {
091        return Objects.hash(id);
092    }
093}