@Override
public IndexReader open(String... indexNames) {
TreeSet<String> names = new TreeSet<String>();
for (String name : indexNames) {
if (name != null) {
names.add(name);
}
}
final int size = names.size();
if (size == 0) {
throw log.needAtLeastOneIndexName();
}
String[] indexManagerNames = names.toArray(new String[size]);
IndexManagerHolder managerSource = searchFactory.getIndexManagerHolder();
IndexManager[] managers = new IndexManager[size];
for (int i = 0; i < size; i++) {
String indexName = indexManagerNames[i];
managers[i] = managerSource.getIndexManager(indexName);
if (managers[i] == null) {
throw log.requestedIndexNotDefined(indexName);
}
}
return MultiReaderFactory.openReader(managers);
}
