/** INTERNAL: Select all objects for a concrete descriptor. */
protected Object selectAllObjects(ReadAllQuery query) {
ReadAllQuery concreteQuery = (ReadAllQuery) query.deepClone();
concreteQuery.setReferenceClass(descriptor.getJavaClass());
concreteQuery.setDescriptor(descriptor);
// Avoid cloning the query again ...
concreteQuery.setIsExecutionClone(true);
concreteQuery
.getExpressionBuilder()
.setQueryClassAndDescriptor(descriptor.getJavaClass(), descriptor);
// Update the selection criteria if needed as well and don't lose
// the translation row.
if (concreteQuery.getQueryMechanism().getSelectionCriteria() != null) {
// make sure query builder is used for the selection criteria as deepClone will create
// two separate builders.
concreteQuery.setSelectionCriteria(
concreteQuery
.getQueryMechanism()
.getSelectionCriteria()
.rebuildOn(concreteQuery.getExpressionBuilder()));
return query.getSession().executeQuery(concreteQuery, query.getTranslationRow());
}
return query.getSession().executeQuery(concreteQuery);
}
/** 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 one object of any concrete subclass. */
protected Object selectOneObject(ReadObjectQuery query) throws DescriptorException {
ReadObjectQuery concreteQuery = (ReadObjectQuery) query.clone();
Class javaClass = descriptor.getJavaClass();
concreteQuery.setReferenceClass(javaClass);
concreteQuery.setDescriptor(descriptor);
return query.getSession().executeQuery(concreteQuery, concreteQuery.getTranslationRow());
}
/**
* 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;
}
