org.apache.lucene.search.grouping.term
Class TermDistinctValuesCollector
java.lang.Object
org.apache.lucene.search.Collector
org.apache.lucene.search.grouping.AbstractDistinctValuesCollector<TermDistinctValuesCollector.GroupCount>
org.apache.lucene.search.grouping.term.TermDistinctValuesCollector
public class TermDistinctValuesCollector
- extends AbstractDistinctValuesCollector<TermDistinctValuesCollector.GroupCount>
A term based implementation of AbstractDistinctValuesCollector
that relies
on SortedDocValues
to count the distinct values per group.
- WARNING: This API is experimental and might change in incompatible ways in the next release.
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
TermDistinctValuesCollector
public TermDistinctValuesCollector(String groupField,
String countField,
Collection<SearchGroup<BytesRef>> groups)
- Constructs
TermDistinctValuesCollector
instance.
- Parameters:
groupField
- The field to group bycountField
- The field to count distinct values forgroups
- The top N groups, collected during the first phase search
collect
public void collect(int doc)
throws IOException
- Specified by:
collect
in class Collector
- Throws:
IOException
getGroups
public List<TermDistinctValuesCollector.GroupCount> getGroups()
- Description copied from class:
AbstractDistinctValuesCollector
- Returns all unique values for each top N group.
- Specified by:
getGroups
in class AbstractDistinctValuesCollector<TermDistinctValuesCollector.GroupCount>
- Returns:
- all unique values for each top N group
setNextReader
public void setNextReader(AtomicReaderContext context)
throws IOException
- Specified by:
setNextReader
in class Collector
- Throws:
IOException
Copyright © 2000-2013 Apache Software Foundation. All Rights Reserved.