Why are no foreign keys generated with inheritance?

Question

I have a very simple ORM strutcure that I am trying to create with JPA, using inheritance. The two tables get created, but there is not PK-FK relational link between them generated. I know they CAN be generated, because I have other relationships (not using inheritance) where it works.
Could someone please look at these listings and tell me what I am doing wrong? Thank you!
I have this property set in persistence.xml:
  <property name="kodo.jdbc.MappingDefaults" value="ForeignKeyDeleteAction=restrict"/>
Here's the base class:
@Entity(name = "Sensor")
@Table(name = "SensorRecord")
@Inheritance(strategy = InheritanceType.JOINED)
@DiscriminatorColumn(name = "SubType", length = 100)
public abstract class Sensor {
    @Id
    @GeneratedValue
    @Column(name = "RecordId")
    private long recordId;
    //@Basic
    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "Timestamp")
    private Date timestamp;
    /* JPA uses a version field in your entity to detect concurrent
       modifications to the same datastore record.
       The version field must be an integral type ( int, Long, etc) or a
       java.sql.Timestamp. You should consider version fields immutable. */
    @Version
    private int version;
Here's the derived class:
@Entity(name = "Altimeter")
@Table(name = "AltimeterRecord")
@DiscriminatorValue("Altimeter")
public class Altimeter extends Sensor {
    @Basic
    @Column(name = "Altitude")
    private int altitude;
And finally, here's the (redundant) orm.xml:
<entity-mappings xmlns="http://java.sun.com/xml/ns/persistence/orm"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence/orm orm_1_0.xsd"
    version="1.0">
  <!-- declares the default access type for all entities -->
  <access-type>FIELD</access-type>
  <entity class="navdemo.persistence.Sensor" name="Sensor" access="PROPERTY">
    <table name="SensorRecord"/>
    <inheritance strategy="JOINED"/>
    <discriminator-column name="SubType" length="100" discriminator-type="STRING"/>
    <attributes>
      <id name="recordId">
        <column name="RecordId" column-definition="BIGINT"/>
        <generated-value strategy="AUTO"/>
      </id>
      <temporal value="TIMESTAMP">
        <column name="Timestamp"/>
      </temporal>
      <version name="version"/>
    </attributes>
  </entity>
  <entity class="navdemo.persistence.Altimeter" name="Altimeter" access="PROPERTY">
    <table name="AltimeterRecord"/>
    <discriminator-value>Altimeter</discriminator-value>
    <attributes>
      <basic name="altitude">
         <column name="Altitude"/>
      </basic>
    </attributes>
  </entity>
</entity-mappings>

Answer 1

Hi,
well I suggest to use the InputMap/ActionMap approach.
Something like this should work:
    private void installMyActions() {
        CloseAction closeAction = new CloseAction("closeAction");
        installMyAction(closeAction, KeyStroke.getKeyStroke("ESC"));
    private void installMyAction(AbstractAction action, KeyStroke keyStroke) {
        getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(keyStroke, action.getValue(Action.NAME));
        getActionMap().put(action.getValue(Action.NAME), action);
    class CloseAction extends AbstractAction {
        public CloseAction(String name) {
            super(name);
        public void actionPerformed(ActionEvent e) {
            dialog.setVisible(false);
    }Hope that helps,
Michael