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## Uses of Package
org.apache.lucene.index

Packages that use org.apache.lucene.index
org.apache.lucene.analysis | API and code to convert text into indexable/searchable tokens.
org.apache.lucene.analysis.tokenattributes | Useful `Attribute`s for text analysis.
org.apache.lucene.document | The logical representation of a `Document` for indexing and searching.
org.apache.lucene.index | Code to maintain and access indices.
org.apache.lucene.queryParser | A simple query parser implemented with JavaCC.
org.apache.lucene.search | Code to search indices.
org.apache.lucene.search.function | Programmatic control over documents scores.
org.apache.lucene.search.payloads | The payloads package provides Query mechanisms for finding and using payloads.
org.apache.lucene.search.spans | The calculus of spans.
org.apache.lucene.store | Binary i/o API, used for all index data.
org.apache.lucene.util | Some utility classes.

Classes in org.apache.lucene.index used by org.apache.lucene.analysis
Payload A Payload is metadata that can be stored together with each occurrence of a term.

Classes in org.apache.lucene.index used by org.apache.lucene.analysis.tokenattributes
Payload A Payload is metadata that can be stored together with each occurrence of a term.

Classes in org.apache.lucene.index used by org.apache.lucene.document
FieldInfo.IndexOptions Controls how much information is stored in the postings lists.

Classes in org.apache.lucene.index used by org.apache.lucene.index
CheckIndex.Status Returned from `CheckIndex.checkIndex()` detailing the health and status of the index.
CheckIndex.Status.FieldNormStatus Status from testing field norms.
CheckIndex.Status.SegmentInfoStatus Holds the status of each segment in the index.
CheckIndex.Status.StoredFieldStatus Status from testing stored fields.
CheckIndex.Status.TermIndexStatus Status from testing term index.
CheckIndex.Status.TermVectorStatus Status from testing stored fields.
ConcurrentMergeScheduler.MergeThread
CorruptIndexException This exception is thrown when Lucene detects an inconsistency in the index.
FieldInfo Access to the Fieldable Info file that describes document fields and whether or not they are indexed.
FieldInfo.IndexOptions Controls how much information is stored in the postings lists.
FieldInfos Collection of `FieldInfo`s (accessible by number or by name).
FilterIndexReader.FilterTermDocs Base class for filtering `TermDocs` implementations.
IndexCommit Expert: represents a single commit into an index as seen by the `IndexDeletionPolicy` or `IndexReader`.
IndexDeletionPolicy Expert: policy for deletion of stale `index commits`.
IndexFileNameFilter Filename filter that accept filenames and extensions only created by Lucene.
IndexReader IndexReader is an abstract class, providing an interface for accessing an index.
IndexReader.ReaderClosedListener A custom listener that's invoked when the IndexReader is closed.
IndexWriter An `IndexWriter` creates and maintains an index.
IndexWriter.IndexReaderWarmer If `IndexWriter.getReader()` has been called (ie, this writer is in near real-time mode), then after a merge completes, this class can be invoked to warm the reader on the newly merged segment, before the merge commits.
IndexWriter.MaxFieldLength Deprecated. use `LimitTokenCountAnalyzer` instead.
IndexWriterConfig Holds all the configuration of `IndexWriter`.
IndexWriterConfig.OpenMode Specifies the open mode for `IndexWriter`: `IndexWriterConfig.OpenMode.CREATE` - creates a new index or overwrites an existing one.
LogMergePolicy This class implements a `MergePolicy` that tries to merge segments into levels of exponentially increasing size, where each level has fewer segments than the value of the merge factor.
MergePolicy Expert: a MergePolicy determines the sequence of primitive merge operations.
MergePolicy.MergeSpecification A MergeSpecification instance provides the information necessary to perform multiple merges.
MergePolicy.OneMerge OneMerge provides the information necessary to perform an individual primitive merge operation, resulting in a single new segment.
MergeScheduler Expert: `IndexWriter` uses an instance implementing this interface to execute the merges selected by a `MergePolicy`.
PayloadProcessorProvider Provides a `PayloadProcessorProvider.ReaderPayloadProcessor` to be used for a `Directory`.
PayloadProcessorProvider.DirPayloadProcessor Deprecated. Use `PayloadProcessorProvider.ReaderPayloadProcessor` instead.
PayloadProcessorProvider.PayloadProcessor Processes the given payload.
PayloadProcessorProvider.ReaderPayloadProcessor Returns a `PayloadProcessorProvider.ReaderPayloadProcessor` for a given `Term` which allows processing the payloads of different terms differently.
PositionBasedTermVectorMapper.TVPositionInfo Container for a term at a position
SegmentInfo Information about a segment such as it's name, directory, and files related to the segment.
SegmentInfos A collection of segmentInfo objects with methods for operating on those segments in relation to the file system.
SegmentReader IndexReader implementation over a single segment.
SegmentReader.CoreClosedListener Called when the shared core for this SegmentReader is closed.
SnapshotDeletionPolicy An `IndexDeletionPolicy` that wraps around any other `IndexDeletionPolicy` and adds the ability to hold and later release snapshots of an index.
StaleReaderException This exception is thrown when an `IndexReader` tries to make changes to the index (via `IndexReader.deleteDocument(int)`, `IndexReader.undeleteAll()` or `IndexReader.setNorm(int, java.lang.String, byte)`) but changes have already been committed to the index since this reader was instantiated.
Term A Term represents a word from text.
TermDocs TermDocs provides an interface for enumerating <document, frequency> pairs for a term.
TermEnum Abstract class for enumerating terms.
TermFreqVector Provides access to stored term vector of a document field.
TermPositions TermPositions provides an interface for enumerating the <document, frequency, <position>* > tuples for a term.
TermVectorEntry Convenience class for holding TermVector information.
TermVectorMapper The TermVectorMapper can be used to map Term Vectors into your own structure instead of the parallel array structure used by `IndexReader.getTermFreqVector(int,String)`.
TermVectorOffsetInfo The TermVectorOffsetInfo class holds information pertaining to a Term in a `TermPositionVector`'s offset information.
TieredMergePolicy Merges segments of approximately equal size, subject to an allowed number of segments per tier.
TieredMergePolicy.MergeScore Holds score and explanation for a single candidate merge.

Classes in org.apache.lucene.index used by org.apache.lucene.queryParser
Term A Term represents a word from text.

Classes in org.apache.lucene.index used by org.apache.lucene.search
CorruptIndexException This exception is thrown when Lucene detects an inconsistency in the index.
FieldInvertState This class tracks the number and position / offset parameters of terms being added to the index.
IndexReader IndexReader is an abstract class, providing an interface for accessing an index.
IndexWriter An `IndexWriter` creates and maintains an index.
Term A Term represents a word from text.
TermEnum Abstract class for enumerating terms.
TermFreqVector Provides access to stored term vector of a document field.

Classes in org.apache.lucene.index used by org.apache.lucene.search.function
IndexReader IndexReader is an abstract class, providing an interface for accessing an index.
Term A Term represents a word from text.

Classes in org.apache.lucene.index used by org.apache.lucene.search.payloads
IndexReader IndexReader is an abstract class, providing an interface for accessing an index.
Term A Term represents a word from text.
TermPositions TermPositions provides an interface for enumerating the <document, frequency, <position>* > tuples for a term.

Classes in org.apache.lucene.index used by org.apache.lucene.search.spans
IndexReader IndexReader is an abstract class, providing an interface for accessing an index.
Term A Term represents a word from text.
TermPositions TermPositions provides an interface for enumerating the <document, frequency, <position>* > tuples for a term.

Classes in org.apache.lucene.index used by org.apache.lucene.store
MergeScheduler Expert: `IndexWriter` uses an instance implementing this interface to execute the merges selected by a `MergePolicy`.

Classes in org.apache.lucene.index used by org.apache.lucene.util
FieldInfos Collection of `FieldInfo`s (accessible by number or by name).
IndexReader IndexReader is an abstract class, providing an interface for accessing an index.

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