org.apache.lucene.search.grouping.function
Class FunctionDistinctValuesCollector

java.lang.Object
  extended by org.apache.lucene.search.Collector
      extended by org.apache.lucene.search.grouping.AbstractDistinctValuesCollector<FunctionDistinctValuesCollector.GroupCount>
          extended by org.apache.lucene.search.grouping.function.FunctionDistinctValuesCollector

public class FunctionDistinctValuesCollector
extends AbstractDistinctValuesCollector<FunctionDistinctValuesCollector.GroupCount>

Function based implementation of AbstractDistinctValuesCollector.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Nested Class Summary
static class FunctionDistinctValuesCollector.GroupCount
          Holds distinct values for a single group.
 
Constructor Summary
FunctionDistinctValuesCollector(Map<?,?> vsContext, ValueSource groupSource, ValueSource countSource, Collection<SearchGroup<MutableValue>> groups)
           
 
Method Summary
 void collect(int doc)
           
 List<FunctionDistinctValuesCollector.GroupCount> getGroups()
          Returns all unique values for each top N group.
 void setNextReader(AtomicReaderContext context)
           
 
Methods inherited from class org.apache.lucene.search.grouping.AbstractDistinctValuesCollector
acceptsDocsOutOfOrder, setScorer
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

FunctionDistinctValuesCollector

public FunctionDistinctValuesCollector(Map<?,?> vsContext,
                                       ValueSource groupSource,
                                       ValueSource countSource,
                                       Collection<SearchGroup<MutableValue>> groups)
Method Detail

getGroups

public List<FunctionDistinctValuesCollector.GroupCount> getGroups()
Description copied from class: AbstractDistinctValuesCollector
Returns all unique values for each top N group.

Specified by:
getGroups in class AbstractDistinctValuesCollector<FunctionDistinctValuesCollector.GroupCount>
Returns:
all unique values for each top N group

collect

public void collect(int doc)
             throws IOException
Specified by:
collect in class Collector
Throws:
IOException

setNextReader

public void setNextReader(AtomicReaderContext context)
                   throws IOException
Specified by:
setNextReader in class Collector
Throws:
IOException


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