if ( DEBUG ) LOGGER.debug( "Indices used for " + term + ": " + usedIndices );
if ( iterators.isEmpty() ) return index.getEmptyIndexIterator( term );
final IndexIterator indexIterator =
index.concatenated ?
new DocumentalConcatenatedClusterIndexIterator( this, iterators.toArray( IndexIterators.EMPTY_ARRAY ), usedIndices.toIntArray() ) :
new DocumentalMergedClusterIndexIterator( this, iterators.toArray( IndexIterators.EMPTY_ARRAY ), usedIndices.toIntArray() ) ;
indexIterator.term( term );
return indexIterator;
}