Package org.elasticsearch.search.aggregations.bucket.filter

Class QueryToFilterAdapter<Q extends org.apache.lucene.search.Query>

java.lang.Object
org.elasticsearch.search.aggregations.bucket.filter.QueryToFilterAdapter<Q>
public class QueryToFilterAdapter<Q extends org.apache.lucene.search.Query>
extends java.lang.Object
Adapts a Lucene Query to the behaviors used be the FiltersAggregator. In general we try to delegate to Query when we don't have a special optimization.

  • Method Summary

    Modifier and Type Method Description
    static QueryToFilterAdapter<?> build​(org.apache.lucene.search.IndexSearcher searcher, java.lang.String key, org.apache.lucene.search.Query query)
    Build a filter for the query against the provided searcher.
    protected boolean countCanUseMetadata​(org.elasticsearch.search.aggregations.bucket.filter.FiltersAggregator.Counter counter, org.apache.lucene.util.Bits live)
    Would using index metadata like IndexReader.docFreq(org.apache.lucene.index.Term) or IndexReader.maxDoc() to count the number of matching documents produce the same answer as collecting the results with a sequence like searcher.collect(counter); return counter.readAndReset();?
    java.lang.String key()
    Key for this filter.
    protected org.apache.lucene.search.IndexSearcher searcher()
    Searcher that this filter is targeting.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Method Details

    • build

      public static QueryToFilterAdapter<?> build​(org.apache.lucene.search.IndexSearcher searcher, java.lang.String key, org.apache.lucene.search.Query query) throws java.io.IOException
      Build a filter for the query against the provided searcher.

      Note: This method rewrites the query against the IndexSearcher

      Throws:
      java.io.IOException

    • key

      public final java.lang.String key()
      Key for this filter.

    • searcher

      protected final org.apache.lucene.search.IndexSearcher searcher()
      Searcher that this filter is targeting.

    • countCanUseMetadata

      protected final boolean countCanUseMetadata​(org.elasticsearch.search.aggregations.bucket.filter.FiltersAggregator.Counter counter, org.apache.lucene.util.Bits live)
      Would using index metadata like IndexReader.docFreq(org.apache.lucene.index.Term) or IndexReader.maxDoc() to count the number of matching documents produce the same answer as collecting the results with a sequence like searcher.collect(counter); return counter.readAndReset();?