Hibernate OneToOne mapping primarykey [xml]

<2> XML Mapping Setting

public class Husband{
    private int id;
    private String name;
    private Wife wife;

    /*
    * getting setting
    */
}

public class Wife{
    private int id;
    private String name;

    /*
    * gettting setting
    */
}
Husband.hmb.xml
<class name="com.lixing.hibernate.model.Husband" table="t_husband">
    <id name="id">
 <generator class="identity">
    </id>
    <property name="name"/>
    <many-to-one name="wife" column="wifeId" unique="true" not-null="true"/>
</class>

Wife.hbm.xml
<class name="com.lixing.hibernate.model.Wife" table="t_wife">
    <id name="id">
 <generator class="identity">
    </id>
    <property name="name"/>
</class>