Entity

public class User implements Serializable {
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	/*
	 * primary key user id
	 */
	@Column(name = "user_id", nullable = false)
	@Basic(fetch = FetchType.LAZY)
	@Id
	@XmlElement
	@GeneratedValue
	Integer userId;