Uses of Package
org.apache.lucene.util

Packages that use org.apache.lucene.util

Package	Description
org.apache.lucene.analysis	API and code to convert text into indexable/searchable tokens.
org.apache.lucene.analysis.tokenattributes	General-purpose attributes for text analysis.
org.apache.lucene.codecs	Codecs API: API for customization of the encoding and structure of the index.
org.apache.lucene.codecs.blocktree	BlockTree terms dictionary.
org.apache.lucene.codecs.compressing	StoredFieldsFormat that allows cross-document and cross-field compression of stored fields.
org.apache.lucene.codecs.lucene3x	Codec to support Lucene 3.x indexes (readonly)
org.apache.lucene.codecs.lucene40	Lucene 4.0 file format.
org.apache.lucene.codecs.lucene41	Lucene 4.1 file format.
org.apache.lucene.codecs.lucene410	Lucene 4.10 file format.
org.apache.lucene.codecs.lucene42	Lucene 4.2 file format.
org.apache.lucene.codecs.lucene45	Lucene 4.5 file format.
org.apache.lucene.codecs.lucene46	Lucene 4.6 file format.
org.apache.lucene.codecs.lucene49	Lucene 4.9 file format.
org.apache.lucene.codecs.perfield	Postings format that can delegate to different formats per-field.
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.search	Code to search indices.
org.apache.lucene.search.payloads	The payloads package provides Query mechanisms for finding and using payloads.
org.apache.lucene.search.similarities	This package contains the various ranking models that can be used in Lucene.
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.
org.apache.lucene.util.automaton	Finite-state automaton for regular expressions.
org.apache.lucene.util.fst	Finite state transducers
org.apache.lucene.util.mutable	Comparable object wrappers
org.apache.lucene.util.packed	Packed integer arrays and streams.

Classes in org.apache.lucene.util used by org.apache.lucene.analysis

Class and Description
Attribute Base interface for attributes.
AttributeFactory An AttributeFactory creates instances of AttributeImpls.
AttributeImpl Base class for Attributes that can be added to a AttributeSource.
AttributeReflector This interface is used to reflect contents of AttributeSource or AttributeImpl.
AttributeSource An AttributeSource contains a list of different AttributeImpls, and methods to add and get them.
BytesRef Represents byte[], as a slice (offset + length) into an existing byte[].
Version Use by certain classes to match version compatibility across releases of Lucene.

Classes in org.apache.lucene.util used by org.apache.lucene.analysis.tokenattributes

Class and Description
Attribute Base interface for attributes.
AttributeImpl Base class for Attributes that can be added to a AttributeSource.
AttributeReflector This interface is used to reflect contents of AttributeSource or AttributeImpl.
BytesRef Represents byte[], as a slice (offset + length) into an existing byte[].

Classes in org.apache.lucene.util used by org.apache.lucene.codecs

Class and Description
Accountable An object whose RAM usage can be computed.
Bits Interface for Bitset-like structures.
BytesRef Represents byte[], as a slice (offset + length) into an existing byte[].
FixedBitSet BitSet of fixed length (numBits), backed by accessible (FixedBitSet.getBits()) long[], accessed with an int index, implementing Bits and DocIdSet.
MutableBits Extension of Bits for live documents.
NamedSPILoader.NamedSPI Interface to support NamedSPILoader.lookup(String) by name.

Classes in org.apache.lucene.util used by org.apache.lucene.codecs.blocktree

Class and Description
Accountable An object whose RAM usage can be computed.
BytesRef Represents byte[], as a slice (offset + length) into an existing byte[].

Classes in org.apache.lucene.util used by org.apache.lucene.codecs.compressing

Class and Description
Accountable An object whose RAM usage can be computed.
BytesRef Represents byte[], as a slice (offset + length) into an existing byte[].

Classes in org.apache.lucene.util used by org.apache.lucene.codecs.lucene3x

Class and Description
NamedSPILoader.NamedSPI Interface to support NamedSPILoader.lookup(String) by name.

Classes in org.apache.lucene.util used by org.apache.lucene.codecs.lucene40

Class and Description
Accountable An object whose RAM usage can be computed.
Bits Interface for Bitset-like structures.
BytesRef Represents byte[], as a slice (offset + length) into an existing byte[].
MutableBits Extension of Bits for live documents.
NamedSPILoader.NamedSPI Interface to support NamedSPILoader.lookup(String) by name.

Classes in org.apache.lucene.util used by org.apache.lucene.codecs.lucene41

Class and Description
Accountable An object whose RAM usage can be computed.
Bits Interface for Bitset-like structures.
BytesRef Represents byte[], as a slice (offset + length) into an existing byte[].
NamedSPILoader.NamedSPI Interface to support NamedSPILoader.lookup(String) by name.

Classes in org.apache.lucene.util used by org.apache.lucene.codecs.lucene410

Class and Description
NamedSPILoader.NamedSPI Interface to support NamedSPILoader.lookup(String) by name.

Classes in org.apache.lucene.util used by org.apache.lucene.codecs.lucene42

Class and Description
NamedSPILoader.NamedSPI Interface to support NamedSPILoader.lookup(String) by name.

Classes in org.apache.lucene.util used by org.apache.lucene.codecs.lucene45

Class and Description
NamedSPILoader.NamedSPI Interface to support NamedSPILoader.lookup(String) by name.

Classes in org.apache.lucene.util used by org.apache.lucene.codecs.lucene46

Class and Description
NamedSPILoader.NamedSPI Interface to support NamedSPILoader.lookup(String) by name.

Classes in org.apache.lucene.util used by org.apache.lucene.codecs.lucene49

Class and Description
NamedSPILoader.NamedSPI Interface to support NamedSPILoader.lookup(String) by name.

Classes in org.apache.lucene.util used by org.apache.lucene.codecs.perfield

Class and Description
NamedSPILoader.NamedSPI Interface to support NamedSPILoader.lookup(String) by name.

Classes in org.apache.lucene.util used by org.apache.lucene.document

Class and Description
BytesRef Represents byte[], as a slice (offset + length) into an existing byte[].

Classes in org.apache.lucene.util used by org.apache.lucene.index

Class and Description
Accountable An object whose RAM usage can be computed.
AttributeSource An AttributeSource contains a list of different AttributeImpls, and methods to add and get them.
Bits Interface for Bitset-like structures.
BytesRef Represents byte[], as a slice (offset + length) into an existing byte[].
BytesRefIterator A simple iterator interface for BytesRef iteration.
InfoStream Debugging API for Lucene classes such as IndexWriter and SegmentInfos.
LongValues Abstraction over an array of longs.
MutableBits Extension of Bits for live documents.
Version Use by certain classes to match version compatibility across releases of Lucene.

Classes in org.apache.lucene.util used by org.apache.lucene.search

Class and Description
Accountable An object whose RAM usage can be computed.
Attribute Base interface for attributes.
AttributeImpl Base class for Attributes that can be added to a AttributeSource.
AttributeSource An AttributeSource contains a list of different AttributeImpls, and methods to add and get them.
Bits Interface for Bitset-like structures.
BytesRef Represents byte[], as a slice (offset + length) into an existing byte[].
BytesRefIterator A simple iterator interface for BytesRef iteration.
Counter Simple counter class
PriorityQueue A PriorityQueue maintains a partial ordering of its elements such that the least element can always be found in constant time.

Classes in org.apache.lucene.util used by org.apache.lucene.search.payloads

Class and Description
Bits Interface for Bitset-like structures.
BytesRef Represents byte[], as a slice (offset + length) into an existing byte[].

Classes in org.apache.lucene.util used by org.apache.lucene.search.similarities

Class and Description
BytesRef Represents byte[], as a slice (offset + length) into an existing byte[].

Classes in org.apache.lucene.util used by org.apache.lucene.search.spans

Class and Description
Bits Interface for Bitset-like structures.

Classes in org.apache.lucene.util used by org.apache.lucene.store

Class and Description
Accountable An object whose RAM usage can be computed.

Classes in org.apache.lucene.util used by org.apache.lucene.util

Class and Description
Accountable An object whose RAM usage can be computed.
Attribute Base interface for attributes.
AttributeFactory An AttributeFactory creates instances of AttributeImpls.
AttributeImpl Base class for Attributes that can be added to a AttributeSource.
AttributeReflector This interface is used to reflect contents of AttributeSource or AttributeImpl.
AttributeSource An AttributeSource contains a list of different AttributeImpls, and methods to add and get them.
AttributeSource.State This class holds the state of an AttributeSource.
Bits Interface for Bitset-like structures.
ByteBlockPool Class that Posting and PostingVector use to write byte streams into shared fixed-size byte[] arrays.
ByteBlockPool.Allocator Abstract class for allocating and freeing byte blocks.
BytesRef Represents byte[], as a slice (offset + length) into an existing byte[].
BytesRefBuilder A builder for BytesRef instances.
BytesRefHash.BytesStartArray Manages allocation of the per-term addresses.
BytesRefIterator A simple iterator interface for BytesRef iteration.
CharsRef Represents char[], as a slice (offset + length) into an existing char[].
CharsRefBuilder A builder for CharsRef instances.
Counter Simple counter class
DoubleBarrelLRUCache.CloneableKey Object providing clone(); the key class must subclass this.
FieldCacheSanityChecker.Insanity Simple container for a collection of related CacheEntry objects that in conjunction with each other represent some "insane" usage of the FieldCache.
FieldCacheSanityChecker.InsanityType An Enumeration of the different types of "insane" behavior that may be detected in a FieldCache.
FixedBitSet BitSet of fixed length (numBits), backed by accessible (FixedBitSet.getBits()) long[], accessed with an int index, implementing Bits and DocIdSet.
InfoStream Debugging API for Lucene classes such as IndexWriter and SegmentInfos.
IntBlockPool A pool for int blocks similar to ByteBlockPool
IntBlockPool.Allocator Abstract class for allocating and freeing int blocks.
IntsRef Represents int[], as a slice (offset + length) into an existing int[].
LongBitSet BitSet of fixed length (numBits), backed by accessible (LongBitSet.getBits()) long[], accessed with a long index.
LongsRef Represents long[], as a slice (offset + length) into an existing long[].
LongValues Abstraction over an array of longs.
NamedSPILoader.NamedSPI Interface to support NamedSPILoader.lookup(String) by name.
NumericUtils.IntRangeBuilder Callback for NumericUtils.splitIntRange(org.apache.lucene.util.NumericUtils.IntRangeBuilder, int, int, int).
NumericUtils.LongRangeBuilder Callback for NumericUtils.splitLongRange(org.apache.lucene.util.NumericUtils.LongRangeBuilder, int, long, long).
OfflineSorter.BufferSize A bit more descriptive unit for constructors.
OfflineSorter.SortInfo Sort info (debugging mostly).
OpenBitSet An "open" BitSet implementation that allows direct access to the array of words storing the bits.
PagedBytes.PagedBytesDataInput
PagedBytes.PagedBytesDataOutput
PagedBytes.Reader Provides methods to read BytesRefs from a frozen PagedBytes.
PForDeltaDocIdSet DocIdSet implementation based on pfor-delta encoding.
PForDeltaDocIdSet.Builder A builder for PForDeltaDocIdSet.
RamUsageEstimator.JvmFeature JVM diagnostic features.
RollingBuffer.Resettable Implement to reset an instance
Sorter Base class for sorting algorithms implementations.
SPIClassIterator Helper class for loading SPI classes from classpath (META-INF files).
Version Use by certain classes to match version compatibility across releases of Lucene.
VirtualMethod A utility for keeping backwards compatibility on previously abstract methods (or similar replacements).
WAH8DocIdSet DocIdSet implementation based on word-aligned hybrid encoding on words of 8 bits.
WAH8DocIdSet.Builder A builder for WAH8DocIdSets.
WeakIdentityMap Implements a combination of WeakHashMap and IdentityHashMap.

Classes in org.apache.lucene.util used by org.apache.lucene.util.automaton

Class and Description
BytesRef Represents byte[], as a slice (offset + length) into an existing byte[].
BytesRefBuilder A builder for BytesRef instances.
IntsRef Represents int[], as a slice (offset + length) into an existing int[].

Classes in org.apache.lucene.util used by org.apache.lucene.util.fst

Class and Description
Accountable An object whose RAM usage can be computed.
BytesRef Represents byte[], as a slice (offset + length) into an existing byte[].
BytesRefBuilder A builder for BytesRef instances.
CharsRef Represents char[], as a slice (offset + length) into an existing char[].
IntsRef Represents int[], as a slice (offset + length) into an existing int[].
IntsRefBuilder A builder for IntsRef instances.

Classes in org.apache.lucene.util used by org.apache.lucene.util.mutable

Class and Description
BytesRef Represents byte[], as a slice (offset + length) into an existing byte[].

Classes in org.apache.lucene.util used by org.apache.lucene.util.packed

Class and Description
Accountable An object whose RAM usage can be computed.
LongsRef Represents long[], as a slice (offset + length) into an existing long[].
LongValues Abstraction over an array of longs.