org.apache.lucene.util

## Class InPlaceMergeSorter

- java.lang.Object
- - org.apache.lucene.util.Sorter
  - - org.apache.lucene.util.InPlaceMergeSorter

-     public abstract class InPlaceMergeSorter
      extends Sorter

  `Sorter` implementation based on the merge-sort algorithm that merges in place (no extra memory will be allocated). Small arrays are sorted with insertion sort.
  NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `InPlaceMergeSorter()` Create a new `InPlaceMergeSorter`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `sort(int from, int to)` Sort the slice which starts at `from` (inclusive) and ends at `to` (exclusive).

    - ### Methods inherited from class org.apache.lucene.util.Sorter

      `compare, comparePivot, setPivot, swap`

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### InPlaceMergeSorter

          public InPlaceMergeSorter()

      Create a new `InPlaceMergeSorter`

  - ### Method Detail

    - #### sort

          public final void sort(int from,
                                 int to)

      Description copied from class: `Sorter`
      Sort the slice which starts at `from` (inclusive) and ends at `to` (exclusive).
      Specified by:
        `sort` in class `Sorter`

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