gsmiller commented on a change in pull request #159:
URL: https://github.com/apache/lucene/pull/159#discussion_r641852899
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File path: lucene/facet/src/java/org/apache/lucene/facet/DrillSideways.java
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@@ -335,10 +342,22 @@ protected boolean scoreSubDocsAtOnce() {
/** Hits. */
public final TopDocs hits;
+ /** Collector to compute Facets */
+ FacetsCollector drillDowns;
+
+ /** drill-down dimensions */
+ Map<String, Integer> drillDownDims;
Review comment:
The idea here is actually a little bit different. What we'd like to do
is expose the same inputs available to `buildFacetsResult` inside of
`DrillSidewaysResult`. So the idea is that calling code has direct access to
the `FacetsCollector` instances, and also knows which dimensions they belong
to. So what you did here for the `drillDowns` collector is exactly what I was
thinking (except make it `public` so it has visibility to the calling code
outside the package). But for the "sideways" collectors, I think we want a
`Map<String, FacetsCollector>` that maps each drill down dimension to the
`FacetsCollector` associated with it. Essentially we want calling code to get
all the same information that `buildFacetsResult` gets, but not force the user
to produce an instance of `Facets` as a result.
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