Package org.apache.lucene.facet

Class FacetsCollector

java.lang.Object

org.apache.lucene.search.SimpleCollector

org.apache.lucene.facet.FacetsCollector

All Implemented Interfaces:

Collector, LeafCollector

Direct Known Subclasses:

RandomSamplingFacetsCollector

public class FacetsCollector
extends SimpleCollector

Collects hits for subsequent faceting. Once you've run a search and collect hits into this, instantiate one of the Facets subclasses to do the facet counting. Use the search utility methods to perform an "ordinary" search but also collect into a Collector.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	FacetsCollector.MatchingDocs	Holds the documents that were matched in the LeafReaderContext.

Constructor Summary

Constructors

Constructor	Description
FacetsCollector()	Default constructor
FacetsCollector(boolean keepScores)	Create this; if keepScores is true then a float[] is allocated to hold score of all hits.

Method Summary

Modifier and Type	Method	Description
final void	collect(int doc)
protected void	doSetNextReader(LeafReaderContext context)
final boolean	getKeepScores()	True if scores were saved.
List<FacetsCollector.MatchingDocs>	getMatchingDocs()	Returns the documents matched by the query, one FacetsCollector.MatchingDocs per visited segment.
ScoreMode	scoreMode()
static TopDocs	search(IndexSearcher searcher, Query q, int n, Collector fc)	Utility method, to search and also collect all hits into the provided Collector.
static TopFieldDocs	search(IndexSearcher searcher, Query q, int n, Sort sort, boolean doDocScores, Collector fc)	Utility method, to search and also collect all hits into the provided Collector.
static TopFieldDocs	search(IndexSearcher searcher, Query q, int n, Sort sort, Collector fc)	Utility method, to search and also collect all hits into the provided Collector.
static TopDocs	searchAfter(IndexSearcher searcher, ScoreDoc after, Query q, int n, Collector fc)	Utility method, to search and also collect all hits into the provided Collector.
static TopDocs	searchAfter(IndexSearcher searcher, ScoreDoc after, Query q, int n, Sort sort, boolean doDocScores, Collector fc)	Utility method, to search and also collect all hits into the provided Collector.
static TopDocs	searchAfter(IndexSearcher searcher, ScoreDoc after, Query q, int n, Sort sort, Collector fc)	Utility method, to search and also collect all hits into the provided Collector.
final void	setScorer(Scorable scorer)

Methods inherited from class org.apache.lucene.search.SimpleCollector

getLeafCollector

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.lucene.search.LeafCollector

competitiveIterator

Constructor Details

FacetsCollector

public FacetsCollector()

Default constructor

FacetsCollector

public FacetsCollector(boolean keepScores)

Create this; if keepScores is true then a float[] is allocated to hold score of all hits.

Method Details

getKeepScores

public final boolean getKeepScores()

True if scores were saved.

getMatchingDocs

public List<FacetsCollector.MatchingDocs> getMatchingDocs()

Returns the documents matched by the query, one FacetsCollector.MatchingDocs per visited segment.

collect

public final void collect(int doc)
                   throws IOException

Specified by:

collect in interface LeafCollector

Specified by:

collect in class SimpleCollector

Throws:

IOException

scoreMode

public ScoreMode scoreMode()

setScorer

public final void setScorer(Scorable scorer)
                     throws IOException

Specified by:

setScorer in interface LeafCollector

Overrides:

setScorer in class SimpleCollector

Throws:

IOException

doSetNextReader

protected void doSetNextReader(LeafReaderContext context)
                        throws IOException

Overrides:

doSetNextReader in class SimpleCollector

Throws:

IOException

search

public static TopDocs search(IndexSearcher searcher,
 Query q,
 int n,
 Collector fc)
                      throws IOException

Utility method, to search and also collect all hits into the provided Collector.

Throws:

IOException

search

public static TopFieldDocs search(IndexSearcher searcher,
 Query q,
 int n,
 Sort sort,
 Collector fc)
                           throws IOException

Utility method, to search and also collect all hits into the provided Collector.

Throws:

IOException

search

public static TopFieldDocs search(IndexSearcher searcher,
 Query q,
 int n,
 Sort sort,
 boolean doDocScores,
 Collector fc)
                           throws IOException

Utility method, to search and also collect all hits into the provided Collector.

Throws:

IOException

searchAfter

public static TopDocs searchAfter(IndexSearcher searcher,
 ScoreDoc after,
 Query q,
 int n,
 Collector fc)
                           throws IOException

Utility method, to search and also collect all hits into the provided Collector.

Throws:

IOException

searchAfter

public static TopDocs searchAfter(IndexSearcher searcher,
 ScoreDoc after,
 Query q,
 int n,
 Sort sort,
 Collector fc)
                           throws IOException

Utility method, to search and also collect all hits into the provided Collector.

Throws:

IOException

searchAfter

public static TopDocs searchAfter(IndexSearcher searcher,
 ScoreDoc after,
 Query q,
 int n,
 Sort sort,
 boolean doDocScores,
 Collector fc)
                           throws IOException

Utility method, to search and also collect all hits into the provided Collector.

Throws:

IOException