Project BookStore

Book.java

package com.dangquan.webapp.bookstore.entity;

import org.apache.commons.lang3.builder.EqualsBuilder;
import org.apache.commons.lang3.builder.HashCodeBuilder;
import org.apache.commons.lang3.builder.ToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;
import org.hibernate.validator.constraints.NotEmpty;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;

import java.io.Serializable;
import java.math.BigDecimal;
import java.util.Date;
import java.util.Set;

/**
 * Created by dangquan on Dec 29, 2015
 * Email: dangquanzt@gmail.com
 */
@Entity
@Table(name = "tbl_book")
public class Book implements Serializable {

	private static final long serialVersionUID = 2784896266770837325L;

	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	@Column(name = "book_id")
	private long id;

	@NotNull
	@NotEmpty
	@Column(name = "title", nullable = false, unique = true)
	private String title;

	@NotNull
	@NotEmpty
	@Min(value = 2000)
	@Column(name = "year", nullable = false)
	private int year;

	@Column(name = "isbn", nullable = false, unique = true)
	private String isbn;

	@Column(name = "price", nullable = false)
	private BigDecimal price;

	/*
	 * @formatter:off
	 */
	@NotNull
	@ManyToMany(fetch = FetchType.EAGER )
	@JoinTable(name = "tbl_author_book", 
			   joinColumns = { @JoinColumn(name = "book_id") }, 
			   inverseJoinColumns = {@JoinColumn(name = "author_id") })
	private Set<Author> authors;

	/*
	 * @formatter:on
	 */
	@ManyToMany(mappedBy = "books", fetch = FetchType.LAZY)
	private Set<Category> categories;

	@Column(name = "last_update", nullable = false)
	@Temporal(TemporalType.TIMESTAMP)
	private Date lastUpdate;

	@Column(name = "description", nullable = false, unique = true)
	private String description;

	public Book(Book source) {
		this.title = source.getTitle();
		this.isbn = source.getIsbn();
		this.authors = source.getAuthors();
		this.categories = source.getCategories();
		this.description = source.getDescription();
		this.lastUpdate = source.getLastUpdate();
		this.price = source.getPrice();
		this.year = source.getYear();
	}

	public Book() {
		super();
	}

	public Date getLastUpdate() {
		return lastUpdate;
	}

	public void setLastUpdate(Date lastUpdate) {
		this.lastUpdate = lastUpdate;
	}

	public String getDescription() {
		return description;
	}

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

	public long getId() {
		return id;
	}

	public String getTitle() {
		return title;
	}

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

	public int getYear() {
		return year;
	}

	public void setYear(int year) {
		this.year = year;
	}

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

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

	public Set<Category> getCategories() {
		return categories;
	}

	public void setCategories(Set<Category> categories) {
		this.categories = categories;
	}

	public BigDecimal getPrice() {
		return price;
	}

	public void setPrice(BigDecimal price) {
		this.price = price;
	}

	public String getIsbn() {
		return isbn;
	}

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

	@Override
	public boolean equals(Object obj) {
		if (obj == null || !(obj instanceof Book)) {
			return false;
		}

		if (this == obj) {
			return true;
		}

		Book other = (Book) obj;

		EqualsBuilder equalsBuilder = new EqualsBuilder();
		return equalsBuilder.append(this.getTitle(), other.getTitle()).append(this.getAuthors(), other.getAuthors())
				.isEquals();
	}

	@Override
	public String toString() {
		ToStringBuilder builder = new ToStringBuilder(this, ToStringStyle.MULTI_LINE_STYLE);
		builder.append("id", this.getId());
		builder.append("title", this.getTitle());
		builder.append("authors", this.authors.toArray());
		builder.append("isbn", this.getIsbn());
		builder.append("year", this.getYear());
		builder.append("price", this.getPrice());
		return builder.toString();
	}

	@Override
	public int hashCode() {
		HashCodeBuilder builder = new HashCodeBuilder();
		return builder.append(this.getTitle()).append(this.getAuthors()).hashCode();
	}
}