<generator class="foreign">
     <param name="property">parent</param>
</generator>

<class name="com.catalepse.patientity.models.Person" table="PERSON">

        <id name="personId" type="long"  column="PERSON_ID" unsaved value="null" >
                <generator class="identity"/>
        </id>

        <joined-subclass name="Patient" table="PATIENT">
                <key column="PERSON_ID"/>
                <one-to-one name="chart" cascade="all" constrained="true"/>
        </joined-subclass>
</class>

<class name="Chart" table="CHART">

        <id name="personId" type="integer"  column="PERSON_ID" unsaved-value="null" >
                 <generator class="foreign">
                        <param name="property">patient</param>
                </generator>
        </id>
            
        <one-to-one name="patient"/>
</class>

Patient patient = new Patient();
Chart chart = new Chart();

patient.setChart(chart);
chart.setPatient(patient);

//THIS IS THE FIX I HAVE TO GET IT TO WORK WITH AN ASSIGNED ID
//chart.setPersonId((int)patient.getPersonId());

PatientService.savePatient(patient);
ChartService.saveChart(chart);

Session session = FactoryPlant.getSession();
Transaction transaction = session.beginTransaction();

session.save(patient);

transaction.commit();
session.close();