OrmLite – Prevent automatic database changes when adding to or removing from a ForeignCollection

Question

Currently, I am using OrmLite and I have three objects A, B, and C. A contains a ForeignCollection of B, and B contains a ForeignCollection of C. Anytime I add an element to the ForeignCollections an insert statement is instantly executed. A delete statement is instantly executed anytime I remove an element.

I would like to add/remove without the statements being executed until I either create or update A. Is this possible?

Answer 1

I would like to add/remove without the statements being executed until I either create or update A. Is this possible?

There is no way to do this currently. The lazy-loaded collection doesn't even store items in itself so the idea of caching changes for later is not possible.

You could do this on your own however. You could keep a list of items in the entity and then override the dao.create(...) and dao.update(...) methods to call collection.addAll(...) if there are any cached items in your special collection.

private List<Item> foreignItemsToAdd;
...
private void addForeignItem(Item item) {
   if (foreignItemsToAdd == null) {
       foreignItemsToAdd = new ArrayList<Item>();
   }
}

Then the dao would have something like:

@Override
public int create(ParentItem parent) throws SQLException {
    if (parent.getForeignItemsToAdd() != null) {
        parent.getForeignItems().addAll(parent.getForeignItemsToAdd());
    }
    return super.create(parent);
}