/** * 1. record the collection role that this collection is referenced by 2. decide if the collection * needs deleting/creating/updating (but don't actually schedule the action yet) */ @SuppressWarnings({"JavaDoc"}) private static void prepareCollectionForUpdate( PersistentCollection collection, CollectionEntry entry, SessionFactoryImplementor factory) { if (entry.isProcessed()) { throw new AssertionFailure("collection was processed twice by flush()"); } entry.setProcessed(true); final CollectionPersister loadedPersister = entry.getLoadedPersister(); final CollectionPersister currentPersister = entry.getCurrentPersister(); if (loadedPersister != null || currentPersister != null) { // it is or was referenced _somewhere_ boolean ownerChanged = loadedPersister != currentPersister || // if either its role changed, !currentPersister .getKeyType() .isEqual( // or its key changed entry.getLoadedKey(), entry.getCurrentKey(), factory); if (ownerChanged) { // do a check final boolean orphanDeleteAndRoleChanged = loadedPersister != null && currentPersister != null && loadedPersister.hasOrphanDelete(); if (orphanDeleteAndRoleChanged) { throw new HibernateException( "Don't change the reference to a collection with cascade=\"all-delete-orphan\": " + loadedPersister.getRole()); } // do the work if (currentPersister != null) { entry.setDorecreate(true); // we will need to create new entries } if (loadedPersister != null) { entry.setDoremove(true); // we will need to remove ye olde entries if (entry.isDorecreate()) { LOG.trace("Forcing collection initialization"); collection.forceInitialization(); } } } else if (collection.isDirty()) { // the collection's elements have changed entry.setDoupdate(true); } } }