{code:java}
package be.amaris.example.business.naturalid;
import java.util.Date;
import javax.persistence.AttributeOverride;
import javax.persistence.AttributeOverrides;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import org.hibernate.annotations.ForeignKey;
import org.hibernate.annotations.NaturalId;
import be.amaris.frame.business.PersistentObjectByLong;
import be.amaris.frame.infrastructure.IValidator;
@Entity
@Table(name="EXA_FLAT_BOAT")
@AttributeOverrides({
@AttributeOverride(name="id", column=@Column(name="FLB_ID", length=5)),
@AttributeOverride(name="versionId", column=@Column(name="FLB_VRS"))
})
public class FlatBoat extends PersistentObjectByLong{
private Barge barge;
private String name;
@Override
public void validate(IValidator validator) {
}
@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name = "BAR_ID", nullable=false)
@ForeignKey(name = "EXAF_FLB_BAR_ID")
@NaturalId(mutable=false)
public Barge getBarge() {
return barge;
}
@Column(name = "FLB_VALID_START", nullable = false)
@NaturalId(mutable = true)
public String getName() {
return name;
}
public void setBarge(Barge barge) {
this.barge = barge;
}
public void setName(String name) {
this.name = name;
}
}
{code}
{code:java}
package be.amaris.example.business.naturalid;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.AttributeOverride;
import javax.persistence.AttributeOverrides;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.OneToMany;
import javax.persistence.OrderBy;
import javax.persistence.Table;
import be.amaris.frame.business.PersistentObjectByLong;
import be.amaris.frame.infrastructure.IValidator;
@Entity
@Table(name="EXA_BARGE")
@AttributeOverrides({
@AttributeOverride(name="id", column=@Column(name="BAR_ID", length=5)),
@AttributeOverride(name="versionId", column=@Column(name="BAR_VRS"))
})
public class Barge extends PersistentObjectByLong {
@Override
public void validate(IValidator validator) {
}
}
{code}
{code:java}
@Test
public void testImmutableNaturalIdShouldBeChangeable testImmutableNaturalIdShouldNotBeChangeable () throws PersistenceExceptionWithDetail {
// if there is another @NaturalId for which mutable = true, then the the @NaturalId with mutable = false can also be changed
Barge first = new Barge();
bargeDAO.save(first);
FlatBoat flatBoat = new FlatBoat();
flatBoat.setBarge(first);
flatBoat.setName("name");
flatBoatDAO.save(flatBoat);
persistenceManager.commit();
Barge second = new Barge();
bargeDAO.save(second);
flatBoat.setBarge(second);
try {
persistenceManager.commit();
fail();
} catch (PersistenceExceptionWithDetail e) {
assertEquals(PersistenceExceptionWithDetail.ERROR_IMMUTABLE_NATURALID, e.getMessage());
}
}
{code}
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