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

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

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

    Methods in org.apache.lucene.index that return SegmentInfos
    Modifier and Type | Method and Description
    --- | ---
    `SegmentInfos` | SegmentInfos.`clone()` Returns a copy of this instance, also copying each SegmentInfo.
    `SegmentInfos` | StandardDirectoryReader.`getSegmentInfos()` Return the `SegmentInfos` for this reader.
    `static SegmentInfos` | SegmentInfos.`readCommit(Directory directory, ChecksumIndexInput input, long generation)` Read the commit from the provided `ChecksumIndexInput`.
    `static SegmentInfos` | SegmentInfos.`readCommit(Directory directory, String segmentFileName)` Read a particular segmentFileName.
    `static SegmentInfos` | SegmentInfos.`readLatestCommit(Directory directory)` Find the latest commit (`segments_N file`) and load all `SegmentCommitInfo`s.

    Methods in org.apache.lucene.index with parameters of type SegmentInfos
    Modifier and Type | Method and Description
    --- | ---
    `void` | IndexWriter.`decRefDeleter(SegmentInfos segmentInfos)` Record that the files referenced by this `SegmentInfos` are no longer in use.
    `abstract MergePolicy.MergeSpecification` | MergePolicy.`findForcedDeletesMerges(SegmentInfos segmentInfos, MergePolicy.MergeContext mergeContext)` Determine what set of merge operations is necessary in order to expunge all deletes from the index.
    `MergePolicy.MergeSpecification` | TieredMergePolicy.`findForcedDeletesMerges(SegmentInfos infos, MergePolicy.MergeContext mergeContext)`
    `MergePolicy.MergeSpecification` | LogMergePolicy.`findForcedDeletesMerges(SegmentInfos segmentInfos, MergePolicy.MergeContext mergeContext)` Finds merges necessary to force-merge all deletes from the index.
    `MergePolicy.MergeSpecification` | FilterMergePolicy.`findForcedDeletesMerges(SegmentInfos segmentInfos, MergePolicy.MergeContext mergeContext)`
    `MergePolicy.MergeSpecification` | OneMergeWrappingMergePolicy.`findForcedDeletesMerges(SegmentInfos segmentInfos, MergePolicy.MergeContext mergeContext)`
    `MergePolicy.MergeSpecification` | NoMergePolicy.`findForcedDeletesMerges(SegmentInfos segmentInfos, MergePolicy.MergeContext mergeContext)`
    `abstract MergePolicy.MergeSpecification` | MergePolicy.`findForcedMerges(SegmentInfos segmentInfos, int maxSegmentCount, Map<SegmentCommitInfo,Boolean> segmentsToMerge, MergePolicy.MergeContext mergeContext)` Determine what set of merge operations is necessary in order to merge to `<=` the specified segment count.
    `MergePolicy.MergeSpecification` | TieredMergePolicy.`findForcedMerges(SegmentInfos infos, int maxSegmentCount, Map<SegmentCommitInfo,Boolean> segmentsToMerge, MergePolicy.MergeContext mergeContext)`
    `MergePolicy.MergeSpecification` | LogMergePolicy.`findForcedMerges(SegmentInfos infos, int maxNumSegments, Map<SegmentCommitInfo,Boolean> segmentsToMerge, MergePolicy.MergeContext mergeContext)` Returns the merges necessary to merge the index down to a specified number of segments.
    `MergePolicy.MergeSpecification` | FilterMergePolicy.`findForcedMerges(SegmentInfos segmentInfos, int maxSegmentCount, Map<SegmentCommitInfo,Boolean> segmentsToMerge, MergePolicy.MergeContext mergeContext)`
    `MergePolicy.MergeSpecification` | OneMergeWrappingMergePolicy.`findForcedMerges(SegmentInfos segmentInfos, int maxSegmentCount, Map<SegmentCommitInfo,Boolean> segmentsToMerge, MergePolicy.MergeContext mergeContext)`
    `MergePolicy.MergeSpecification` | NoMergePolicy.`findForcedMerges(SegmentInfos segmentInfos, int maxSegmentCount, Map<SegmentCommitInfo,Boolean> segmentsToMerge, MergePolicy.MergeContext mergeContext)`
    `MergePolicy.MergeSpecification` | UpgradeIndexMergePolicy.`findForcedMerges(SegmentInfos segmentInfos, int maxSegmentCount, Map<SegmentCommitInfo,Boolean> segmentsToMerge, MergePolicy.MergeContext mergeContext)`
    `MergePolicy.MergeSpecification` | MergePolicy.`findFullFlushMerges(MergeTrigger mergeTrigger, SegmentInfos segmentInfos, MergePolicy.MergeContext mergeContext)` Identifies merges that we want to execute (synchronously) on commit.
    `MergePolicy.MergeSpecification` | FilterMergePolicy.`findFullFlushMerges(MergeTrigger mergeTrigger, SegmentInfos segmentInfos, MergePolicy.MergeContext mergeContext)`
    `MergePolicy.MergeSpecification` | OneMergeWrappingMergePolicy.`findFullFlushMerges(MergeTrigger mergeTrigger, SegmentInfos segmentInfos, MergePolicy.MergeContext mergeContext)`
    `MergePolicy.MergeSpecification` | NoMergePolicy.`findFullFlushMerges(MergeTrigger mergeTrigger, SegmentInfos segmentInfos, MergePolicy.MergeContext mergeContext)`
    `abstract MergePolicy.MergeSpecification` | MergePolicy.`findMerges(MergeTrigger mergeTrigger, SegmentInfos segmentInfos, MergePolicy.MergeContext mergeContext)` Determine what set of merge operations are now necessary on the index.
    `MergePolicy.MergeSpecification` | TieredMergePolicy.`findMerges(MergeTrigger mergeTrigger, SegmentInfos infos, MergePolicy.MergeContext mergeContext)`
    `MergePolicy.MergeSpecification` | LogMergePolicy.`findMerges(MergeTrigger mergeTrigger, SegmentInfos infos, MergePolicy.MergeContext mergeContext)` Checks if any merges are now necessary and returns a `MergePolicy.MergeSpecification` if so.
    `MergePolicy.MergeSpecification` | FilterMergePolicy.`findMerges(MergeTrigger mergeTrigger, SegmentInfos segmentInfos, MergePolicy.MergeContext mergeContext)`
    `MergePolicy.MergeSpecification` | OneMergeWrappingMergePolicy.`findMerges(MergeTrigger mergeTrigger, SegmentInfos segmentInfos, MergePolicy.MergeContext mergeContext)`
    `MergePolicy.MergeSpecification` | NoMergePolicy.`findMerges(MergeTrigger mergeTrigger, SegmentInfos segmentInfos, MergePolicy.MergeContext mergeContext)`
    `MergePolicy.MergeSpecification` | UpgradeIndexMergePolicy.`findMerges(MergeTrigger mergeTrigger, SegmentInfos segmentInfos, MergePolicy.MergeContext mergeContext)`
    `void` | IndexWriter.`incRefDeleter(SegmentInfos segmentInfos)` Record that the files referenced by this `SegmentInfos` are still in use.
    `protected boolean` | LogMergePolicy.`isMerged(SegmentInfos infos, int maxNumSegments, Map<SegmentCommitInfo,Boolean> segmentsToMerge, MergePolicy.MergeContext mergeContext)` Returns true if the number of segments eligible for merging is less than or equal to the specified `maxNumSegments`.
    `protected boolean` | MergePolicy.`isMerged(SegmentInfos infos, SegmentCommitInfo info, MergePolicy.MergeContext mergeContext)` Returns true if this single info is already fully merged (has no pending deletes, is in the same dir as the writer, and matches the current compound file setting
    `static DirectoryReader` | StandardDirectoryReader.`open(Directory directory, SegmentInfos infos, List<? extends LeafReader> oldReaders)` This constructor is only used for `StandardDirectoryReader.doOpenIfChanged(SegmentInfos)`, as well as NRT replication.
    `void` | SegmentInfos.`updateGeneration(SegmentInfos other)` Carry over generation numbers from another SegmentInfos
    `boolean` | MergePolicy.`useCompoundFile(SegmentInfos infos, SegmentCommitInfo mergedInfo, MergePolicy.MergeContext mergeContext)` Returns true if a new segment (regardless of its origin) should use the compound file format.
    `boolean` | FilterMergePolicy.`useCompoundFile(SegmentInfos infos, SegmentCommitInfo mergedInfo, MergePolicy.MergeContext mergeContext)`
    `boolean` | NoMergePolicy.`useCompoundFile(SegmentInfos segments, SegmentCommitInfo newSegment, MergePolicy.MergeContext mergeContext)`

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