@Enumerated and EnumType.STRING

Sun May 09, 2010 11:39 am

You can use @Enumerated , to map java ENUM values to your entity properties .You limit the values to this Enum only.

Entity class :

Code:: package com.codemiles.jpa; import java.util.Date; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.EnumType; import javax.persistence.Enumerated; import javax.persistence.Id; import javax.persistence.OneToOne; import javax.persistence.Table; @Entity @Table(name="PERSON") public class Person implements java.io.Serializable{ /** * */ private static final long serialVersionUID = 1L; @Id private String Id; private String name; private Date birthday; @Enumerated(EnumType.STRING) private GenderType gender; @OneToOne(mappedBy="person") private Bed bed; public String getId() { return Id; } public void setId(String id) { Id = id; } @Column(name="NAME") public String getName() { return name; } public void setName(String name) { this.name = name; } @Column(name="BIRTHDAT") public Date getBirthday() { return birthday; } public void setBirthday(Date birthday) { this.birthday = birthday; } public GenderType getGender() { return gender; } public void setGender(GenderType gender) { this.gender = gender; } public void setBed(Bed bed) { this.bed = bed; } public Bed getBed() { return bed; } }

Persisting entity :

Code:: package com.codemiles.jpa; import java.util.Date; import javax.persistence.EntityManager; import javax.persistence.EntityManagerFactory; import javax.persistence.Persistence; /** * @author codemiles. */ public abstract class JPAService { private EntityManager entityManager; public void insertPerson(String Id, String name, Date birthday, GenderType gender, Bed bed) { EntityManagerFactory factory = Persistence .createEntityManagerFactory("persistenceUnitName"); entityManager = factory.createEntityManager(); entityManager.getTransaction().begin(); Person person = new Person(); person.setName(name); person.setBirthday(birthday); person.setBed(bed); entityManager.persist(person); entityManager.getTransaction().commit(); entityManager.close(); factory.close(); } }