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

- Packages that use FirstPassGroupingCollector
  Package | Description
  --- | ---
  org.apache.lucene.search.grouping | Grouping.
  org.apache.lucene.search.grouping.function | Support for grouping by `ValueSource`.
  org.apache.lucene.search.grouping.term | Support for grouping by indexed terms via `DocValues`.

- - ### Uses of FirstPassGroupingCollector in org.apache.lucene.search.grouping

    Methods in org.apache.lucene.search.grouping that return FirstPassGroupingCollector
    Modifier and Type | Method and Description
    --- | ---
    `abstract FirstPassGroupingCollector<T>` | Grouper.`getFirstPassCollector(Sort sort, int count)` Create a first-pass collector

  - ### Uses of FirstPassGroupingCollector in org.apache.lucene.search.grouping.function

    Subclasses of FirstPassGroupingCollector in org.apache.lucene.search.grouping.function
    Modifier and Type | Class and Description
    --- | ---
    `class` | `FunctionFirstPassGroupingCollector` Concrete implementation of `FirstPassGroupingCollector` that groups based on `ValueSource` instances.

    Methods in org.apache.lucene.search.grouping.function that return FirstPassGroupingCollector
    Modifier and Type | Method and Description
    --- | ---
    `FirstPassGroupingCollector<MutableValue>` | FunctionGrouper.`getFirstPassCollector(Sort sort, int count)`

  - ### Uses of FirstPassGroupingCollector in org.apache.lucene.search.grouping.term

    Subclasses of FirstPassGroupingCollector in org.apache.lucene.search.grouping.term
    Modifier and Type | Class and Description
    --- | ---
    `class` | `TermFirstPassGroupingCollector` Concrete implementation of `FirstPassGroupingCollector` that groups based on field values and more specifically uses `SortedDocValues` to collect groups.

    Methods in org.apache.lucene.search.grouping.term that return FirstPassGroupingCollector
    Modifier and Type | Method and Description
    --- | ---
    `FirstPassGroupingCollector<BytesRef>` | TermGrouper.`getFirstPassCollector(Sort sort, int count)`

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