// Create selector.
Selector selector = new Selector();
selector.setFields(new String[] {"Name", "Id", "ControlId", "AdGroupsCount",
"AdGroupCriteriaCount", "AdGroupAdsCount"});
selector.setOrdering(new OrderBy[] {new OrderBy("Name", SortOrder.ASCENDING)});
// Create predicates.
Predicate campaignIdPredicate =
new Predicate("CampaignId", PredicateOperator.IN, new String[] {campaignId.toString()});
selector.setPredicates(new Predicate[] {campaignIdPredicate});