DirectToXMLTypeMapping "create-tables" not generating XMLTYPE column type

Question

Can someone tell me how to code an XMLTYPE field such that "create-tables" will generate the XMLTYPE column and such that the IntegrityChecker will not throw an error.
I am forced to run these alters after "create-tables" is run.
ALTER TABLE XML_SYS_MSG drop column message;
ALTER TABLE XML_SYS_MSG add (message XMLType);
Snippets:
<persistence...
<property name="eclipselink.ddl-generation" value="create-tables" />
</persistence>
public class XmlMessageCustomizer implements DescriptorCustomizer {
@Override
public void customize(final ClassDescriptor descriptor) throws Exception {
final DirectToXMLTypeMapping mapping = new DirectToXMLTypeMapping();
descriptor.removeMappingForAttributeName("message");
// name of the attribute
mapping.setAttributeName("message");
// IntegrityChecker requires uppercase for oracle
// name of the column
mapping.setFieldName("MESSAGE");
descriptor.addMapping(mapping);
@Entity(name = "XmlMessage")
@Table(name = "XML_MSG")
@Customizer(XmlMessageCustomizer.class)
public class XmlMessage {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "ID")
private long id;
// @Column(columnDefinition = "XMLTYPE")
// private String message;
// ALTER TABLE XML_SYS_MSG drop column message;
// ALTER TABLE XML_SYS_MSG add (message XMLType);
private Document message;
public XmlMessage() {
public long getId() {
return id;
public void setId(final long id) {
this.id = id;
public Document getMessage() {
return message;
public void setMessage(final Document message) {
this.message = message;
Secondly if I turn on the IntegrityChecker it will fail
public class EnableIntegrityChecker implements SessionCustomizer {
@Override
public void customize(final Session session) throws Exception {
session.getIntegrityChecker().checkDatabase();
session.getIntegrityChecker().setShouldCatchExceptions(false);
}

Answer 1

Adding:
     mapping.getField().setColumnDefinition("XMLTYPE");to the customizer should solve the problem.
--Shaun