JPA Entity Bean for a Book

Book.java

import java.time.LocalDate;

import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Lob;
import javax.persistence.Table;

import javax.validation.constraints.NotBlank;
import javax.validation.constraints.Past;

import org.hibernate.validator.constraints.ISBN;
import org.hibernate.validator.constraints.URL;

import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;

@Entity
@Table(name = "books")
public class Book {
    @Id
    @ISBN
    private String isbn;
    @NotBlank(message ="Title is required.")
    private String title;
    private String subtitle;
    @NotBlank(message ="Author is required.")
    private String author;
    private String publisher;
    @Past
    @JsonDeserialize(using = LocalDateDeserializer.class)
    @JsonSerialize(using = LocalDateSerializer.class)
    private LocalDate published;
    private int pages;
    @Lob
    @NotBlank(message ="Description is required.")
    private String description;
    @URL
    @NotBlank(message ="Website is required.")
    private String website;
    // The no-argument constructor, which is also a JavaBean convention, is a requirement for all
    // persistent classes.
    // https://docs.jboss.org/hibernate/orm/5.5/quickstart/html_single/
    public Book() { }

    public String getIsbn() {
        return isbn;
    }

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

    public String getTitle() {
        return title;
    }

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

    public String getSubtitle() {
        return subtitle;
    }

    public void setSubtitle(String subtitle) {
        this.subtitle = subtitle;
    }

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }

    public String getPublisher() {
        return publisher;
    }

    public void setPublisher(String publisher) {
        this.publisher = publisher;
    }

    public LocalDate getPublished() {
        return published;
    }

    public void setPublished(LocalDate published) {
        this.published = published;
    }

    public int getPages() {
        return pages;
    }

    public void setPages(int pages) {
        this.pages = pages;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public String getWebsite() {
        return website;
    }

    public void setWebsite(String website) {
        this.website = website;
    }
}