Interacting with Databases through the Java Persistence API - Java EE 7 Development with NetBeans 8 - page 150

import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
@Entity
@Table(name = "CUSTOMER")
@NamedQueries({
@NamedQuery(name = "Customer.findAll", query = "SELECT c FROM
Customer c"),
@NamedQuery(name = "Customer.findByCustomerId", query = "SELECT c
FROM Customer c WHERE c.customerId = :customerId"),
@NamedQuery(name = "Customer.findByFirstName", query = "SELECT c
FROM Customer c WHERE c.firstName = :firstName"),
@NamedQuery(name = "Customer.findByMiddleName", query = "SELECT c
FROM Customer c WHERE c.middleName = :middleName"),
@NamedQuery(name = "Customer.findByLastName", query = "SELECT c
FROM Customer c WHERE c.lastName = :lastName"),
@NamedQuery(name = "Customer.findByEmail", query = "SELECT c FROM
Customer c WHERE c.email = :email")})
public class Customer implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@Basic(optional = false)
@NotNull
@Column(name = "CUSTOMER_ID")
private Integer customerId;
@Size(max = 20)
@Column(name = "FIRST_NAME")
private String firstName;
@Size(max = 20)
@Column(name = "MIDDLE_NAME")
private String middleName;
@Size(max = 20)
@Column(name = "LAST_NAME")
private String lastName;
// @Pattern(regexp="[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.
[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-
9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?", message="Invalid email")//
if the field contains email address consider using this annotation to
enforce field validation
@Size(max = 30)
@Column(name = "EMAIL")
private String email;