Hibernate and Java: how to save objects in my table?

[Adriano Bellavita]

Hi all,

I have this simple class in my Java app.

public class Person {

private String id;
private String name;
private Pet pet;

}

public class Pet {

private String id;
private String name;

}

My mysql database look in this way: I have only a table, named "person". It have 4 columns: 'id', 'name', 'petid', 'petname'.

So I want to describe in my xml file that the value of Pet.id has to be stored in person.petid and that Pet.name has to be stored in person.petname.

How can I perform this step?

<?xml version="1.0" encoding="UTF-8"?>
<hibernate-mapping>
<class name="packagename.Person" table="person">
<id name="id" column="id" type="java.lang.String" />
<property name="name" column="name" type="java.lang.String" />
<property name="pet" ??? />

[Alexander Bondarev]

Hibernate has <component> XML element which allows you define mapping for embeddable objects whose properties are mapped in the same table as the owning entity's table. See Embedded objects (aka components)