/**
* Cascades the persist operation.
*
* @param entityManager the entity manager
* @param processed registry of processed entities
* @param instances the managed instances
* @return true if an implicit flush is required, false otherwise
* @since 2.0.0
*/
public boolean cascadePersist(
EntityManagerImpl entityManager,
ArrayList<Object> processed,
LinkedList<ManagedInstance<?>> instances) {
ManagedInstance.LOG.debug("Cascading persist on {0}", this);
boolean requiresFlush = false;
for (final AssociationMappingImpl<?, ?, ?> association :
this.type.getAssociationsPersistable()) {
// if the association a collection attribute then we will cascade to each element
if (association instanceof PluralAssociationMappingImpl) {
final PluralAssociationMappingImpl<?, ?, ?> mapping =
(PluralAssociationMappingImpl<?, ?, ?>) association;
switch (mapping.getAttribute().getCollectionType()) {
case MAP:
// extract the map
final Map<?, ?> map = (Map<?, ?>) mapping.get(this.instance);
// cascade to each element in the map
for (final Object element : map.values()) {
requiresFlush |= entityManager.persistImpl(element, processed, instances);
}
break;
case LIST:
// extract the list
final List<?> list = (List<?>) mapping.get(this.instance);
// cascade to each element in the list
for (int i = 0; i < list.size(); i++) {
requiresFlush |= entityManager.persistImpl(list.get(i), processed, instances);
}
break;
default:
// extract the collection
final Collection<?> collection = (Collection<?>) mapping.get(this.instance);
// cascade to each element in the collection
if (collection instanceof List) {
final List<?> castedList = (List<?>) collection;
for (int i = 0; i < castedList.size(); i++) {
requiresFlush |= entityManager.persistImpl(castedList.get(i), processed, instances);
}
} else {
for (final Object element : collection) {
requiresFlush |= entityManager.persistImpl(element, processed, instances);
}
}
break;
}
} else {
final SingularAssociationMappingImpl<?, ?> mapping =
(SingularAssociationMappingImpl<?, ?>) association;
final Object associate = mapping.get(this.instance);
if (associate != null) {
requiresFlush |= entityManager.persistImpl(associate, processed, instances);
}
}
}
return requiresFlush;
}
