Package org.apache.lucene.facet.rangeonrange

Class DoubleRangeOnRangeFacetCounts

java.lang.Object

org.apache.lucene.facet.Facets

org.apache.lucene.facet.FacetCountsWithFilterQuery

org.apache.lucene.facet.rangeonrange.DoubleRangeOnRangeFacetCounts

public class DoubleRangeOnRangeFacetCounts
extends FacetCountsWithFilterQuery

Represents counts for double range on range faceting. To be more specific, this means that given a range (or list of ranges), this class will count all the documents in the index (or that match a fast match query) that contain ranges that "match" the provided ranges. These ranges are specified by the field parameter and expected to be of type DoubleRangeDocValuesField. Matching is defined by the queryType param, you can see the type of matching supported by looking at RangeFieldQuery.QueryType. In addition, this class supports multidimensional ranges. A multidimensional range will be counted as a match if every dimension matches the corresponding indexed range's dimension.

Field Summary

Fields inherited from class org.apache.lucene.facet.FacetCountsWithFilterQuery

fastMatchQuery

Constructor Summary

Constructors

Constructor	Description
DoubleRangeOnRangeFacetCounts(String field, FacetsCollector hits, RangeFieldQuery.QueryType queryType, DoubleRange... ranges)	Constructor without the fast match query, see other constructor description for more details.
DoubleRangeOnRangeFacetCounts(String field, FacetsCollector hits, RangeFieldQuery.QueryType queryType, Query fastMatchQuery, DoubleRange... ranges)	Represents counts for double range on range faceting.

Method Summary

Modifier and Type	Method	Description
protected void	count(String field, List<FacetsCollector.MatchingDocs> matchingDocs, byte[][] encodedRanges, int numEncodedValueBytes, RangeFieldQuery.QueryType queryType)	Counts from the provided field.
FacetResult	getAllChildren(String dim, String... path)	Returns all child labels with non-zero counts under the specified path.
List<FacetResult>	getAllDims(int topN)	Returns topN labels for any dimension that had hits, sorted by the number of hits that dimension matched; this is used for "sparse" faceting, where many different dimensions were indexed, for example depending on the type of document.
Number	getSpecificValue(String dim, String... path)	Return the count or value for a specific path.
FacetResult	getTopChildren(int topN, String dim, String... path)	Returns the topN child labels under the specified path.

Methods inherited from class org.apache.lucene.facet.FacetCountsWithFilterQuery

createIterator

Methods inherited from class org.apache.lucene.facet.Facets

getTopDims, validateTopN

Methods inherited from class java.lang.Object

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

Constructor Details

DoubleRangeOnRangeFacetCounts

public DoubleRangeOnRangeFacetCounts(String field,
 FacetsCollector hits,
 RangeFieldQuery.QueryType queryType,
 DoubleRange... ranges)
                              throws IOException

Constructor without the fast match query, see other constructor description for more details.

Throws:

IOException

DoubleRangeOnRangeFacetCounts

public DoubleRangeOnRangeFacetCounts(String field,
 FacetsCollector hits,
 RangeFieldQuery.QueryType queryType,
 Query fastMatchQuery,
 DoubleRange... ranges)
                              throws IOException

Represents counts for double range on range faceting. See class javadoc for more details.

Parameters:

field - specifies a DoubleRangeDocValuesField that will define the indexed ranges

hits - hits we want to count against

queryType - type of intersection we want to count (IE: range intersection, range contains, etc.)

fastMatchQuery - query to quickly discard hits using some heuristic

ranges - ranges we want the counts of

Throws:

IOException - low level exception

Method Details

count

protected void count(String field,
 List<FacetsCollector.MatchingDocs> matchingDocs,
 byte[][] encodedRanges,
 int numEncodedValueBytes,
 RangeFieldQuery.QueryType queryType)
              throws IOException

Counts from the provided field.

Throws:

IOException

getAllChildren

public FacetResult getAllChildren(String dim,
 String... path)
                           throws IOException

Returns all child labels with non-zero counts under the specified path. Users should make no assumptions about ordering of the children. Returns null if the specified path doesn't exist or if this dimension was never seen.

NOTE: This implementation guarantees that ranges will be returned in the order specified by the user when calling the constructor.

Specified by:

getAllChildren in class Facets

Throws:

IOException

getTopChildren

public FacetResult getTopChildren(int topN,
 String dim,
 String... path)
                           throws IOException

Description copied from class: Facets

Returns the topN child labels under the specified path. Returns null if the specified path doesn't exist or if this dimension was never seen.

Specified by:

getTopChildren in class Facets

Throws:

IOException

getSpecificValue

public Number getSpecificValue(String dim,
 String... path)
                        throws IOException

Description copied from class: Facets

Return the count or value for a specific path. Returns -1 if this path doesn't exist, else the count.

Specified by:

getSpecificValue in class Facets

Throws:

IOException

getAllDims

public List<FacetResult> getAllDims(int topN)
                             throws IOException

Description copied from class: Facets

Returns topN labels for any dimension that had hits, sorted by the number of hits that dimension matched; this is used for "sparse" faceting, where many different dimensions were indexed, for example depending on the type of document.

Specified by:

getAllDims in class Facets

Throws:

IOException