Module org.elasticsearch.server

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

Class QueryToFilterAdapter

java.lang.Object

org.elasticsearch.search.aggregations.bucket.filter.QueryToFilterAdapter

public class QueryToFilterAdapter
extends 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.

Field Summary

Fields

Modifier and Type	Field	Description
protected int	segmentsCountedInConstantTime

Method Summary

Modifier and Type	Method	Description
static QueryToFilterAdapter	build(org.apache.lucene.search.IndexSearcher searcher, String key, org.apache.lucene.search.Query query)	Build a filter for the query against the provided searcher.
boolean	isInefficientUnion()	Is this an inefficient union of the top level query with the filter? If the top level query if complex we can't efficiently merge it with the filter.
final String	key()	Key for this filter.
protected final 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

Field Details

segmentsCountedInConstantTime

protected int segmentsCountedInConstantTime

Method Details

build

public static QueryToFilterAdapter build(org.apache.lucene.search.IndexSearcher searcher,
 String key,
 org.apache.lucene.search.Query query)
                                  throws IOException

Build a filter for the query against the provided searcher.

Note: This method rewrites the query against the IndexSearcher

Throws:

IOException

isInefficientUnion

public boolean isInefficientUnion()

Is this an inefficient union of the top level query with the filter? If the top level query if complex we can't efficiently merge it with the filter. If we can't do that it is likely faster to just run the "native" aggregation implementation rather than go filter by filter.

key

public final String key()

Key for this filter.

searcher

protected final org.apache.lucene.search.IndexSearcher searcher()

Searcher that this filter is targeting.