Steve Knight schrieb:
If my SortableDataProvider implementation will always return the max number
of results (I'm not using paging), is it safe to have the size() method
simply return Integer.MAX_VALUE instead of performing a database query to
count the actual results?
You shouldn't. It might not give you problems right now, but you break
the contract with the interface.
You can cache the result so that you do only one query per request to
get both the result size and the result values. Use onDetach to clear
the cache after each request.
It should look like this (pseudo-code):
private List result;
void onDetach() {
result = null;
}
Iterator iterator(from, to) {
return getData().iterator();
}
int size() {
return result.size();
}
private Collection getData() {
if (result == null) {
result = dbquery(from, to);
}
return result;
}
Timo
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