String countField,
DocValuesType dvType) {
Random random = random();
Collection<SearchGroup<T>> searchGroups = firstPassGroupingCollector.getTopGroups(0, false);
if (FunctionFirstPassGroupingCollector.class.isAssignableFrom(firstPassGroupingCollector.getClass())) {
return (AbstractDistinctValuesCollector) new FunctionDistinctValuesCollector(new HashMap<Object, Object>(), new BytesRefFieldSource(groupField), new BytesRefFieldSource(countField), (Collection) searchGroups);
} else {
return (AbstractDistinctValuesCollector) new TermDistinctValuesCollector(groupField, countField, (Collection) searchGroups);
}
}