Hibernate
works best with the Plain Old Java Objects
programming model for persistent classes.
Hibernate is not restricted in its usage
of property types, all Java JDK types
and primitives (like String, char and
Date) can be mapped, including classes
from the Java collections framework. You
can map them as values, collections of
values, or associations to other entities.
The id is a special property that represents
the database identifer (primary key) of
that class, Hibernate can use identifiers
only internally, but we would lose some
of the flexibility in our application
architecture.
No special interface has to be implemented
for persistent classes nor do you have
to subclass from a special root persistent
class. Hibernate also doesn't require
any build time processing, such as byte-code
manipulation, it relies solely on Java
reflection and runtime class enhancement
(through CGLIB). So, without any dependency
of the POJO class on Hibernate, we can
map it to a database table.
Following code sample represents a java
object structure which represents the
AppLabsUser table. Generally these domain
objects contain only getters and setters
methods. One can use Hibernate extension
toolset to create such domain objects.
AppLabsUser.java
package
org.applabs.quickstart;
import java.io.Serializable;
import java.util.Date;
import org.apache.commons.lang.builder.ToStringBuilder;
public class
AppLabsUser implements Serializable
{ |
| |
public void setName(String name)
{
/** identifier field */
private Long id;
/** persistent field */
private String userName;
/** persistent field */
private String userPassword;
/** persistent field */
private String userFirstName;
/** persistent field */
private String userLastName;
/** persistent field */
private String userEmail;
/** persistent field */
private Date userCreationDate;
/** persistent field */
private Date userModificationDate;
/** full constructor */
public Applabsuser(String userName,
String userPassword, String userFirstName,
String userLastName, String userEmail,
Date userCreationDate, Date userModificationDate)
{
this.userName = userName;
this.userPassword = userPassword;
this.userFirstName = userFirstName;
this.userLastName = userLastName;
this.userEmail = userEmail;
this.userCreationDate = userCreationDate;
this.userModificationDate = userModificationDate;
}
/** default constructor */
public Applabsuser() {
}
public Long getId() {
return this.id;
}
public void setId(Long id) {
this.id = id;
}
public String getUserName() {
return this.userName;
}
public void setUserName(String userName)
{
this.userName = userName;
}
public String getUserPassword()
{
return this.userPassword;
}
public void setUserPassword(String
userPassword) {
this.userPassword = userPassword;
}
public String getUserFirstName()
{
return this.userFirstName;
}
public void setUserFirstName(String
userFirstName) {
this.userFirstName = userFirstName;
}
public String getUserLastName()
{
return this.userLastName;
}
public void setUserLastName(String
userLastName) {
this.userLastName = userLastName;
}
public String getUserEmail() {
return this.userEmail;
}
public void setUserEmail(String
userEmail) {
this.userEmail = userEmail;
}
public Date getUserCreationDate()
{
return this.userCreationDate;
}
public void setUserCreationDate(Date
userCreationDate) {
this.userCreationDate = userCreationDate;
}
public Date getUserModificationDate()
{
return this.userModificationDate;
}
public void setUserModificationDate(Date
userModificationDate) {
this.userModificationDate = userModificationDate;
}
public String toString() {
return new ToStringBuilder(this)
.append("id", getId())
.toString();
}
|
| }//
End of class |
|
