epotyom commented on code in PR #14237:
URL: https://github.com/apache/lucene/pull/14237#discussion_r1960045582
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lucene/demo/src/java/org/apache/lucene/demo/facet/SandboxFacetsExample.java:
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@@ -130,6 +135,88 @@ void index() throws IOException {
IOUtils.close(indexWriter, taxoWriter);
}
+ /**
+ * Example for {@link FacetBuilder} usage - simple API that provides results
in a format very
+ * similar to classic facets module. It doesn't give all flexibility
available with {@link
+ * org.apache.lucene.sandbox.facet.cutters.FacetCutter} and {@link
+ * org.apache.lucene.sandbox.facet.recorders.FacetRecorder} though, see
below for lower level API
+ * usage examples.
+ */
+ private List<FacetResult> simpleFacetsWithSearch() throws IOException {
+ //// init readers and searcher
+ DirectoryReader indexReader = DirectoryReader.open(indexDir);
+ IndexSearcher searcher = new IndexSearcher(indexReader);
+ TaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoDir);
+
+ //// build facets requests
+ FacetBuilder authorFacetBuilder =
+ new TaxonomyFacetBuilder(config, taxoReader, "Author").withTopN(10);
+ FacetBuilder priceFacetBuilder =
+ LongRangeFacetBuilder.create(
+ "Price",
+ new LongRange("0-10", 0, true, 10, true),
+ new LongRange("10-20", 10, true, 20, true));
+
+ //// Main hits collector
+ TopScoreDocCollectorManager hitsCollectorManager =
+ new TopScoreDocCollectorManager(2, Integer.MAX_VALUE);
+
+ //// Search and collect
+ TopDocs topDocs =
+ new FacetOrchestrator()
Review Comment:
Each `FacetBuilder` can have its own topN value set by `withTopN()`, which
is used to compute `FacetBuilder#getResult`
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