/** INTERNAL: Delete the reference objects. */
public void preDelete(DeleteObjectQuery query) throws DatabaseException, OptimisticLockException {
if (isForeignKeyRelationship()) {
return;
}
if (!this.shouldObjectModifyCascadeToParts(query)) {
return;
}
Object objects =
this.getRealCollectionAttributeValueFromObject(query.getObject(), query.getSession());
ContainerPolicy cp = this.getContainerPolicy();
// if privately-owned parts have their privately-owned sub-parts, delete them one by one;
// else delete everything in one shot
if (this.mustDeleteReferenceObjectsOneByOne()) {
for (Object iter = cp.iteratorFor(objects); cp.hasNext(iter); ) {
DeleteObjectQuery deleteQuery = new DeleteObjectQuery();
deleteQuery.setIsExecutionClone(true);
deleteQuery.setObject(cp.next(iter, query.getSession()));
deleteQuery.setCascadePolicy(query.getCascadePolicy());
query.getSession().executeQuery(deleteQuery);
}
if (!query.getSession().isUnitOfWork()) {
// This deletes any objects on the database, as the collection in memory may have been
// changed.
// This is not required for unit of work, as the update would have already deleted these
// objects,
// and the backup copy will include the same objects causing double deletes.
this.deleteReferenceObjectsLeftOnDatabase(query);
}
} else {
this.deleteAll(query);
}
}
/** INTERNAL: Delete the reference objects. */
@Override
public void postDelete(DeleteObjectQuery query)
throws DatabaseException, OptimisticLockException {
if (!isForeignKeyRelationship()) {
return;
}
if (!this.shouldObjectModifyCascadeToParts(query)) {
return;
}
Object referenceObjects =
this.getRealCollectionAttributeValueFromObject(query.getObject(), query.getSession());
// if we have a custom delete all query, use it;
// otherwise, delete the reference objects one by one
if (this.hasCustomDeleteAllQuery()) {
this.deleteAll(query, referenceObjects);
} else {
ContainerPolicy cp = this.getContainerPolicy();
for (Object iter = cp.iteratorFor(referenceObjects); cp.hasNext(iter); ) {
DeleteObjectQuery deleteQuery = new DeleteObjectQuery();
deleteQuery.setIsExecutionClone(true);
deleteQuery.setObject(cp.next(iter, query.getSession()));
deleteQuery.setCascadePolicy(query.getCascadePolicy());
query.getSession().executeQuery(deleteQuery);
}
if (!query.getSession().isUnitOfWork()) {
// This deletes any objects on the database, as the collection in memory may have been
// changed.
// This is not required for unit of work, as the update would have already deleted these
// objects,
// and the backup copy will include the same objects, causing double deletes.
this.deleteReferenceObjectsLeftOnDatabase(query);
}
}
}
