Artist.java

package com.phonoforce.tramory.entities;

import javax.persistence.*;
import javax.xml.bind.annotation.*;
import java.util.HashSet;
import java.util.Set;

import static javax.persistence.GenerationType.IDENTITY;

@Entity
@Table(name = "Artist")
@XmlRootElement(name = "artist")
@XmlAccessorType(XmlAccessType.FIELD)
public class Artist implements IEntity {
    @XmlElement(required = true)
    private int artistId;

    @XmlElement(required = true)
    private String biography;

    @XmlElement(required = true)
    private String pseudonym;

    @XmlElement(required = true)
    private String url;

    @XmlTransient
    /*@XmlElementWrapper(name = "albums")
    @XmlElement(name = "album", required = true)*/
    private Set<Album> albums;

    public Artist() {
        this.albums = new HashSet<>();
    }

    @Id
    @GeneratedValue(strategy = IDENTITY)
    @Column(name = "artist_id", unique = true, nullable = false)
    public int getId() {
        return artistId;
    }

    public void setId(int artistId) {
        this.artistId = artistId;
    }

    @Column(name = "biography", nullable = true)
    public String getBiography() {
        return biography;
    }

    public void setBiography(String biography) {
        this.biography = biography;
    }

    @Column(name = "pseudonym", nullable = false)
    public String getPseudonym() {
        return pseudonym;
    }

    public void setPseudonym(String pseudonym) {
        this.pseudonym = pseudonym;
    }

    @Column(name = "url", nullable = true)
    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    @ManyToMany(
            cascade = CascadeType.ALL,
            fetch = FetchType.EAGER,
            mappedBy = "artists"
    )
    public Set<Album> getAlbums() {
        return this.albums;
    }

    public void setAlbums(Set<Album> albums) {
        this.albums = albums;
    }

    @Override
    public String toString() {
        return "Artist{" +
                "artistId=" + artistId +
                ", biography='" + biography + '\'' +
                ", pseudonym='" + pseudonym + '\'' +
                ", url='" + url + '\'' +
                '}';
    }
}