I used seam-gen to generate my entities from my db schema.
I have one entity, Foo that has a subclass SubFoo.
The problem I'm having is that I never directly use Foo, it's always a subclass so, I'm trying to figure out how to wire the super class Foo to a Collection of data that does not have a direct relationship with the subclass.

Here's the code that will illustrate what I'm talking about:

@Entity
@Name("foo")
@Table(name = "FOO")
@Inheritance(strategy=InheritanceType.JOINED)
public class Foo implements java.io.Serializable
{

 private int projectNumber;

 protected Program program;

 protected List<Commitment> commitments = new ArrayList<Commitment>();

 ......

 @Id

 @Column(name = "PROJECT_NUMBER", unique = true, nullable = false, precision = 6, scale = 0)
 @NotNull
 public int getProjectNumber()
 {
 return this.projectNumber;
 }

 public void setProjectNumber(int projectNumber)
 {
 this.projectNumber = projectNumber;
 }

@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "foo")
 public List<Commitment> getCommitments()
 {
 return this.commitments;
 }

 public void setCommitments(List<Commitment> commitments)
 {
 this.commitments = commitments;
 }

}

@Entity
@Table(name = "SUB_FOO")
@PrimaryKeyJoinColumn(name="PROJECT_NUMBER")
public class SubFoo extends Foo implements java.io.Serializable {

 private int projectNumber;


 @Column(name = "PROJECT_NUMBER", insertable=false, updatable=false)
 @NotNull
 public int getProjectNumber() {
 return this.projectNumber;
 }

 public void setProjectNumber(int projectNumber) {
 this.projectNumber = projectNumber;
 }

 .....
}

The relationship in CommitmentHome is tied to the super class, Foo.

package gov.dot.marad.persistence.ejb.model;

import javax.persistence.EntityManager;

import org.jboss.seam.annotations.Factory;
import org.jboss.seam.annotations.In;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.framework.EntityHome;

@Name("commitmentHome")
public class CommitmentHome extends EntityHome<Commitment> {

 @In(create = true)
 FooHome fooHome;

 @In(create = true)
 EntityManager entityManager;

 @In(value="#{fooProjectNumber}")
 private String fooProjectNumber;

 public EntityManager getEntityManager()
 {
 return entityManager;
 }

 @Factory("commitment")
 public Commitment initCommitment()
 {
 return getInstance();
 }

 public void setCommitmentCommitmentId(Integer id) {
 setId(id);
 }

 public Integer getCommitmentCommitmentId() {
 return (Integer) getId();
 }

 @Override
 protected Commitment createInstance() {
 Commitment commitment = new Commitment();
 commitment.setFoo(getEntityManager().find(Foo.class, new Integer(fooProjectNumber)));
 return commitment;
 }

 public void wire() {
 Foo foo = fooHome.getDefinedInstance();
 if (foo != null) {
 getInstance().setFoo(foo);
 }
 }

 public boolean isWired() {
 return true;
 }

 public Commitment getDefinedInstance() {
 return isIdDefined() ? getInstance() : null;
 }

 /**
 * @return the projectNumber
 */
 public String getFooProjectNumber()
 {
 return fooProjectNumber;
 }

 /**
 * @param projectNumber the projectNumber to set
 */
 public void setFooProjectNumber(String projectNumber)
 {
 this.fooProjectNumber = projectNumber;
 }

}

Commitment.java

 .....

@ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
 @JoinColumn(name = "PROJECT_NUMBER")
 public Foo getFoo() {
 return this.foo;
 }

 .....

Is there a way to do this with EntityHome's or should I go back to Session beans?