# Uses of Class
org.apache.lucene.search.grouping.SearchGroup

## Uses of SearchGroup in org.apache.lucene.search.grouping

Subclasses of SearchGroup in org.apache.lucene.search.grouping
Modifier and Type
Class
Description
`class`
`CollectedSearchGroup<T>`
Expert: representation of a group in `FirstPassGroupingCollector`, tracking the top doc and `FieldComparator` slot.
Fields in org.apache.lucene.search.grouping with type parameters of type SearchGroup
Modifier and Type
Field
Description
`protected final Collection<SearchGroup<T>>`
SecondPassGroupingCollector.`groups`
Methods in org.apache.lucene.search.grouping that return types with arguments of type SearchGroup
Modifier and Type
Method
Description
`Collection<SearchGroup<T>>`
FirstPassGroupingCollector.`getTopGroups(int groupOffset)`
Returns top groups, starting from offset.
`static <T> Collection<SearchGroup<T>>`
SearchGroup.`merge(List<Collection<SearchGroup<T>>> topGroups, int offset, int topN, Sort groupSort)`
Merges multiple collections of top groups, for example obtained from separate index shards.
Method parameters in org.apache.lucene.search.grouping with type arguments of type SearchGroup
Modifier and Type
Method
Description
`static <T> Collection<SearchGroup<T>>`
SearchGroup.`merge(List<Collection<SearchGroup<T>>> topGroups, int offset, int topN, Sort groupSort)`
Merges multiple collections of top groups, for example obtained from separate index shards.
`void`
DoubleRangeGroupSelector.`setGroups(Collection<SearchGroup<DoubleRange>> searchGroups)`
`void`
GroupReducer.`setGroups(Collection<SearchGroup<T>> groups)`
Define which groups should be reduced.
`abstract void`
GroupSelector.`setGroups(Collection<SearchGroup<T>> groups)`
Set a restriction on the group values returned by this selector
`void`
LongRangeGroupSelector.`setGroups(Collection<SearchGroup<LongRange>> searchGroups)`
`void`
TermGroupSelector.`setGroups(Collection<SearchGroup<BytesRef>> searchGroups)`
`void`
ValueSourceGroupSelector.`setGroups(Collection<SearchGroup<MutableValue>> searchGroups)`
Constructor parameters in org.apache.lucene.search.grouping with type arguments of type SearchGroup
Modifier
Constructor
Description
``
`DistinctValuesCollector(GroupSelector<T> groupSelector, Collection<SearchGroup<T>> groups, GroupSelector<R> valueSelector)`
Create a DistinctValuesCollector
``
`SecondPassGroupingCollector(GroupSelector<T> groupSelector, Collection<SearchGroup<T>> groups, GroupReducer<T,?> reducer)`
Create a new SecondPassGroupingCollector
``
`TopGroupsCollector(GroupSelector<T> groupSelector, Collection<SearchGroup<T>> groups, Sort groupSort, Sort withinGroupSort, int maxDocsPerGroup, boolean getMaxScores)`
Create a new TopGroupsCollector