gsmiller commented on a change in pull request #264:
URL: https://github.com/apache/lucene/pull/264#discussion_r745151660
##########
File path:
lucene/facet/src/java/org/apache/lucene/facet/taxonomy/TaxonomyFacetLabels.java
##########
@@ -62,7 +62,17 @@ public TaxonomyFacetLabels(TaxonomyReader taxoReader, String
indexFieldName) thr
* @throws IOException when a low-level IO issue occurs
*/
public FacetLabelReader getFacetLabelReader(LeafReaderContext readerContext)
throws IOException {
- return new FacetLabelReader(ordsReader, readerContext);
+ // Support older binary format by leveraging an OrdinalsReader, which can
still support both
+ // formats for now:
+ // TODO: Remove in Lucene 11
+ if (FacetUtils.usesOlderBinaryOrdinals(readerContext.reader(),
indexFieldName)) {
+ OrdinalsReader ordsReader = new DocValuesOrdinalsReader(indexFieldName);
Review comment:
We could probably improve this by only creating the OrdinalsReader once
and "caching" it, although we'd need to synchronize (or just best effort reuse).
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