com.atlassian.jira.issue.statistics.util
Class OneDimensionalObjectHitCollector

java.lang.Object
  org.apache.lucene.search.Collector
      com.atlassian.jira.issue.statistics.util.OneDimensionalObjectHitCollector

public class OneDimensionalObjectHitCollector
extends org.apache.lucene.search.Collector

A HitCollector that creates a doc -> object mapping. This is useful for collecting documents where there are a limited number of terms. The caching also ensures that if multiple searches sort on the same terms, the doc -> object mapping is maintained.

This HitCollector can be quite memory intensive, however the cache is stored with a weak reference, so it will be garbage collected.

This HitCollector differs from OneDimensionalTermHitCollector in that it performs the term -> object conversion here, rather than later. This is more expensive, but useful for StatisticsMappers that perform some sort of runtime conversion / translation (eg a StatisticsMapper that groups dates by Month, or groups users by email domain name).

Constructor Summary

OneDimensionalObjectHitCollector(StatisticsMapper statisticsMapper, Map result, org.apache.lucene.index.IndexReader indexReader)

Method Summary

boolean	acceptsDocsOutOfOrder()
void	collect(int i)
void	setNextReader(org.apache.lucene.index.IndexReader reader, int docBase)
void	setScorer(org.apache.lucene.search.Scorer scorer)

Methods inherited from class java.lang.Object

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

Constructor Detail

OneDimensionalObjectHitCollector

public OneDimensionalObjectHitCollector(StatisticsMapper statisticsMapper,
                                        Map result,
                                        org.apache.lucene.index.IndexReader indexReader)

Method Detail

collect

public void collect(int i)

Specified by:

collect in class org.apache.lucene.search.Collector

setScorer

public void setScorer(org.apache.lucene.search.Scorer scorer)
               throws IOException

Specified by:

setScorer in class org.apache.lucene.search.Collector

Throws:

IOException

setNextReader

public void setNextReader(org.apache.lucene.index.IndexReader reader,
                          int docBase)
                   throws IOException

Specified by:

setNextReader in class org.apache.lucene.search.Collector

Throws:

IOException

acceptsDocsOutOfOrder

public boolean acceptsDocsOutOfOrder()

Specified by:

acceptsDocsOutOfOrder in class org.apache.lucene.search.Collector