Book.java

package guru.springframework.spring6webapp.domain;

import jakarta.persistence.*;

import java.util.Set;

@Entity
public class Book {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    private String title;

    private String isbn;

    @ManyToMany
    @JoinTable(name = "autor_book",joinColumns = @JoinColumn(name = "book_id"),
                inverseJoinColumns = @JoinColumn(name = "author_id"))
    private Set<Author> authors;

    public Set<Author> getAuthors() {
        return authors;
    }

    public void setAuthors(Set<Author> authors) {
        this.authors = authors;
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getIsbn() {
        return isbn;
    }

    public void setIsbn(String isbn) {
        this.isbn = isbn;
    }

    @Override
    public String toString() {
        return "Book{" +
                "id=" + id +
                ", title='" + title + '\'' +
                ", isbn='" + isbn + '\'' +
                '}';
    }

    @Override
    public final boolean equals(Object o) {
        if (this == o) return true;
        if (!(o instanceof Book book)) return false;

        return id.equals(book.id);
    }

    @Override
    public int hashCode() {
        return id.hashCode();
    }
}