= SharedFieldCache.INSTANCE.getStringIndex(reader, field,
FieldNames.createNamedValue(propertyName, ""),
SharedFieldSortComparator.this,
createComparatorValues);
return new ScoreDocComparator() {
public final int compare(final ScoreDoc i, final ScoreDoc j) {
final int fi = index.order[i.doc];
final int fj = index.order[j.doc];
if (fi < fj) {
return -1;