write
1, org.apache.lucene.facet.FacetField metadata field in facet statistics
2, org.apache.lucene.facet.taxonomy.directory.DirectoryTaxonomyWriter classification write
3，org.apache.lucene.facet.FacetsConfig; facet配置
Inquire
1, org.apache.lucene.facet.taxonomy.TaxonomyReader; Taxonomy Reader
1.1, org.apache.lucene.facet.taxonomy.directory.DirectoryTaxonomyReader; path classification read
2, org.apache.lucene.facet.FacetsCollector; store the qualified user facet data collection (FacetsCollector.search method)
3，
4，org.apache.lucene.facet.Facets; facet
Group Statistics
Range Statistics
Sorted result set statistics
5. org.apache.lucene.facet.FacetResult; Li< FacetResult > facet statistical result collection facets.getAllDims get
Classification:
Classification statistics
Range Statistics
related articles:
http://blog.csdn.net/whuqin/article/details/42524825
http://iamyida.iteye.com/blog/2203074