/** INTERNAL: Select one object of any concrete subclass. */
public Object selectOneObjectUsingMultipleTableSubclassRead(ReadObjectQuery query)
throws DatabaseException, QueryException {
Object object = null;
for (Enumeration childDescriptors = getChildDescriptors().elements();
childDescriptors.hasMoreElements() && (object == null); ) {
ClassDescriptor descriptor = (ClassDescriptor) childDescriptors.nextElement();
object = descriptor.getInterfacePolicy().selectOneObject(query);
}
return object;
}
/**
* INTERNAL: Select all objects for an interface descriptor. This is accomplished by selecting for
* all of the concrete classes and then merging the objects.
*
* @return Vector containing all objects.
* @exception DatabaseException - an error has occurred on the database.
*/
public Object selectAllObjectsUsingMultipleTableSubclassRead(ReadAllQuery query)
throws DatabaseException {
org.eclipse.persistence.internal.queries.ContainerPolicy containerPolicy =
query.getContainerPolicy();
Object objects = containerPolicy.containerInstance(1);
for (Enumeration childDescriptors = getChildDescriptors().elements();
childDescriptors.hasMoreElements(); ) {
ClassDescriptor descriptor = (ClassDescriptor) childDescriptors.nextElement();
objects =
containerPolicy.concatenateContainers(
objects, descriptor.getInterfacePolicy().selectAllObjects(query));
}
return objects;
}