private List<String> extractIds(SearchResponse response) {
List<String> ids = new ArrayList<String>();
for (SearchHit hit : response.getHits()) {
if (hit != null) {
ids.add(hit.getId());
}
}
return ids;
}
private static String[] toArray(List<String> values) {
String[] valuesAsArray = new String[values.size()];
return values.toArray(valuesAsArray);
}