Solr Lucene将分类法和DocValues方面结合使用

有许多基于分类索引和DocValues的方面的使用示例。但我需要同时用作类别（分类法）和范围查询（NumericDocValuesField）的层次结构。 例如，侧钻：

  DrillSideways ds = new DrillSideways (searcher, config, taxoReader);
  DrillSideways.DrillSidewaysResult result = ds.search (q, topScoreDocCollector);

ds.search（）的第二个参数是TopCoreDocCollector

FacetsCollector在ds.search（）内部创建，无法将此收集器传递给ds.search（）。将MultiCollector.wrap（FacetsCollector，TopScoreDocCollector）作为ds.search（）中的第二个参数传递。不正确（？）。但是，FacetCollector需要构建分类索引中不可用的方面：

 Facets facetsTime = new LongRangeFacetCounts (..., FacetsCollector, ...);
 facetsTime.getTopChildren (...);

还列出结果。facet包含空值，它指的是DocValues​​小平面

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也许您有一个如何使用分类法和DocValues的工作示例​​侧向钻取中的面一起。

侧向钻取

假设您只使用分类面或SortedSetDocValuesFaces。如果不是这样，您可以将drillways子类化，并重写

buildFacetsResult

方法，以按照自己的喜好构建最终的面。您将获得用于DrillDownQuery的FacetCollector和两个带有侧向FacetCollector和dim的数组，用于您添加到DrissSideways的每个dim

以下是一个例子：

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);
  }
}

公共类MyDrillSideways扩展了DrillSideways{
公共MyDrills横向（IndexSearcher搜索器、FacetsConfig配置、TaxonomyReader TaxoreReader）{
超级（搜索器、配置、税务阅读器）；
}
@凌驾
受保护的Facets buildFacetsResult（FacetsCollector钻取、FacetsCollector[]侧钻、String[]侧钻SDIMS）引发IOException{
字符串longRangeFaceDim=“mySpecialLongRangeDim”；
Facets drillDownFacets=新的FastTaxonomyFaceCounts（taxoReader，配置，深入）；
布尔值foundLongRangeInDrillSideways=false；
Map drillSidewaysFacets=新HashMap（）；
如果（侧钻！=空）{
对于（int i=0；i