DrillSideways假定您仅使用TaxonomyFacets或SortedSetDocValuesFacets。如果不是这种情况，则可以根据需要将DrillSideways子类化并覆盖该buildFacetsResult方法以构建最终的Facet 。对于您添加到DrissSideways中的每个暗角，您将获得用于DrillDownQuery的FacetsCollector和两个带有侧面FacetCollectors和暗角的数组。
这是一个例子：
public class MyDrillSideways extends DrillSideways {
public MyDrillSideways(IndexSearcher searcher, FacetsConfig config, TaxonomyReader taxoReader) {
super(searcher, config, taxoReader);
}
@Override
protected Facets buildFacetsResult(FacetsCollector drillDowns, FacetsCollector[] drillSideways, String[] drillSidewaysDims) throws IOException {
String longRangeFacetDim = "mySpecialLongRangeDim";
Facets drillDownFacets = new FastTaxonomyFacetCounts(taxoReader, config, drillDowns);
boolean foundLongRangeInDrillSideways = false;
Map<String, Facets> drillSidewaysFacets = new HashMap<>();
if (drillSideways != null) {
for (int i = 0; i < drillSideways.length; i++) {
String sidewaysDim = drillSidewaysDims[i];
FacetsCollector drillSideway = drillSideways[i];
Facets sidewaysFacets;
if (sidewaysDim.equals(longRangeFacetDim)) {
foundLongRangeInDrillSideways = true;
sidewaysFacets = new LongRangeFacetCounts(...,drillSideway,...);
} else {
sidewaysFacets = new FastTaxonomyFacetCounts(taxoReader, config, drillSideway);
}
drillSidewaysFacets.put(sidewaysDim, sidewaysFacets);
}
}
if (!foundLongRangeInDrillSideways) {
Facets facetsTime = new LongRangeFacetCounts(..., FacetsCollector, ...);
drillSidewaysFacets.put(longRangeFacetDim, facetsTime);
}
return new MultiFacets(drillSidewaysFacets, drillDownFacets);
}
}
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