## Uses of Class
org.apache.lucene.index.FilterMergePolicy

- Packages that use FilterMergePolicy
  Package | Description
  --- | ---
  org.apache.lucene.index | Code to maintain and access indices.

- - ### Uses of FilterMergePolicy in org.apache.lucene.index

    Subclasses of FilterMergePolicy in org.apache.lucene.index
    Modifier and Type | Class and Description
    --- | ---
    `class` | `OneMergeWrappingMergePolicy` A wrapping merge policy that wraps the `MergePolicy.OneMerge` objects returned by the wrapped merge policy.
    `class` | `SoftDeletesRetentionMergePolicy` This `MergePolicy` allows to carry over soft deleted documents across merges.
    `class` | `UpgradeIndexMergePolicy` This `MergePolicy` is used for upgrading all existing segments of an index when calling `IndexWriter.forceMerge(int)`.

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