I'm implementing some UI paging and trying to detect whether a record exists beyond the current page (in order to show a "more" button).
I hoped to iterate over a result set of pageSize + 1, grabbing the cursor as I pass the item @ pageSize, and then using the existence of the last item to know there's more to be shown. Unfortunately I can't find a way to accomplish this using JDO. JDOCursorHelper.getCursor(List<T>) is documented to get the cursor for the last item in the list, so that works as documented but doesn't help me. JDOCursorHelper.getCursor(Iterator<T>) seems to be what I need, but every Iterator that I can find to pass to it causes it to return null. I've tried passing ((List<T>)query.execute).iterator() as well as ((QueryResult)query.execute).iterator() and both have the same result. Anyone know if there's a not-too-kludgy way to do this w/o requerying the datastore for the additional item. Or is it easier in Objectify (I'm considering switching)? Thanks much, James -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
