public static RelationalDescriptor descriptor() {
RelationalDescriptor descriptor = new RelationalDescriptor();
/* First define the class, table and descriptor properties. */
descriptor.setJavaClass(Customer.class);
descriptor.setTableName("EVENTCUSTOMER");
descriptor.setPrimaryKeyFieldName("ID");
descriptor.setSequenceNumberName("SEQ");
descriptor.setSequenceNumberFieldName("ID");
/* Next define the attribute mappings. */
OneToOneMapping addressMapping = new OneToOneMapping();
addressMapping.setAttributeName("address");
addressMapping.setReferenceClass(Address.class);
addressMapping.dontUseIndirection();
addressMapping.privateOwnedRelationship();
addressMapping.addForeignKeyFieldName("EVENTCUSTOMER.ADDRESS_ID", "EADDRESS.ID");
descriptor.addMapping(addressMapping);
OneToOneMapping phoneMapping = new OneToOneMapping();
phoneMapping.setAttributeName("phoneNumber");
phoneMapping.setReferenceClass(Phone.class);
phoneMapping.dontUseIndirection();
phoneMapping.privateOwnedRelationship();
phoneMapping.addForeignKeyFieldName("EVENTCUSTOMER.PHONE_ID", "EPHONE.ID");
descriptor.addMapping(phoneMapping);
OneToOneMapping emailMapping = new OneToOneMapping();
emailMapping.setAttributeName("email");
emailMapping.setReferenceClass(EmailAccount.class);
emailMapping.dontUseIndirection();
emailMapping.privateOwnedRelationship();
emailMapping.addForeignKeyFieldName("EVENTCUSTOMER.EMAIL_ID", "EMAILACC.ID");
descriptor.addMapping(emailMapping);
DirectCollectionMapping associationsMapping = new DirectCollectionMapping();
associationsMapping.setAttributeName("associations");
associationsMapping.dontUseIndirection();
associationsMapping.setReferenceTableName("EASSOCIATIONS");
associationsMapping.setDirectFieldName("EASSOCIATIONS.DESCRIP");
associationsMapping.addReferenceKeyFieldName("EASSOCIATIONS.CUSTOMER_ID", "EVENTCUSTOMER.ID");
descriptor.addMapping(associationsMapping);
OneToManyMapping ordersMapping = new OneToManyMapping();
ordersMapping.setAttributeName("orders");
ordersMapping.setReferenceClass(Order.class);
ordersMapping.useBasicIndirection();
ordersMapping.addTargetForeignKeyFieldName("EVENTORDER.CUSTOMER_ID", "EVENTCUSTOMER.ID");
descriptor.addMapping(ordersMapping);
AggregateObjectMapping creditMapping = new AggregateObjectMapping();
creditMapping.setAttributeName("creditCard");
creditMapping.setReferenceClass(org.eclipse.persistence.testing.models.events.CreditCard.class);
creditMapping.setIsNullAllowed(true);
descriptor.addMapping(creditMapping);
descriptor.addDirectMapping("id", "ID");
descriptor.addDirectMapping("name", "NAME");
return descriptor;
}