epotyom commented on code in PR #13702:
URL: https://github.com/apache/lucene/pull/13702#discussion_r1740642814


##########
lucene/facet/src/java/org/apache/lucene/facet/DrillSideways.java:
##########
@@ -414,62 +399,59 @@ public <R> ConcurrentDrillSidewaysResult<R> search(
 
   /**
    * Search using DrillDownQuery with custom collectors. This method can be 
used with any {@link
-   * CollectorOwner}s. It doesn't return anything because it is expected that 
you read results from
-   * provided {@link CollectorOwner}s.
-   *
-   * <p>To read the results, run {@link CollectorOwner#getResult()} for drill 
down and all drill
-   * sideways dimensions.
-   *
-   * <p>Note: use {@link Collections#unmodifiableList(List)} to wrap {@code
-   * drillSidewaysCollectorOwners} to convince compiler that it is safe to use 
List here.
-   *
-   * <p>Use {@link MultiCollectorManager} wrapped by {@link CollectorOwner} to 
collect both hits and
-   * facets for the entire query and/or for drill-sideways dimensions.
+   * CollectorManager}s.
    *
-   * <p>TODO: Class CollectorOwner was created so that we can ignore 
CollectorManager type C,
-   * because we want each dimensions to be able to use their own types. 
Alternatively, we can use
-   * typesafe heterogeneous container and provide CollectorManager type for 
each dimension to this
-   * method? I do like CollectorOwner approach as it seems more intuitive?
+   * <p>Note: Use {@link MultiCollectorManager} to collect both hits and 
facets for the entire query
+   * and/or for drill-sideways dimensions. You can also use it to wrap 
different types of {@link
+   * CollectorManager} for drill-sideways dimensions.
    */
-  public void search(
+  public <C extends Collector, T, K extends Collector, R> Result<T, R> search(
       final DrillDownQuery query,
-      CollectorOwner<?, ?> drillDownCollectorOwner,
-      List<CollectorOwner<?, ?>> drillSidewaysCollectorOwners)
+      CollectorManager<C, T> drillDownCollectorManager,
+      List<CollectorManager<K, R>> drillSidewaysCollectorManagers)
       throws IOException {
-    if (drillDownCollectorOwner == null) {
+    if (drillDownCollectorManager == null) {
       throw new IllegalArgumentException(
           "This search method requires client to provide drill down collector 
manager");
     }
-    if (drillSidewaysCollectorOwners == null) {
+    if (drillSidewaysCollectorManagers == null) {

Review Comment:
   I agree that we can deprecate them, as well as `#search`, 
`#buildFacetsResult` methods that relies on these methods. I believe it will 
make future migration to `IndexSearcher` easier.



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