Package org.apache.lucene.codecs.uniformsplit

Class UniformSplitTermsReader

java.lang.Object

org.apache.lucene.index.Fields

org.apache.lucene.codecs.FieldsProducer

org.apache.lucene.codecs.uniformsplit.UniformSplitTermsReader

All Implemented Interfaces:

Closeable, AutoCloseable, Iterable<String>

Direct Known Subclasses:

STUniformSplitTermsReader

public class UniformSplitTermsReader
extends FieldsProducer

A block-based terms index and dictionary based on the Uniform Split technique.

See Also:

• UniformSplitTermsWriter

WARNING: This API is experimental and might change in incompatible ways in the next release.

Field Summary

Fields

Modifier and Type	Field	Description
protected final IndexInput	blockInput
protected final IndexInput	dictionaryInput
protected final Map<String,UniformSplitTerms>	fieldToTermsMap
protected final PostingsReaderBase	postingsReader
protected final Collection<String>	sortedFieldNames
protected final int	version

Fields inherited from class org.apache.lucene.index.Fields

EMPTY_ARRAY

Constructor Summary

Constructors

Modifier	Constructor	Description
	UniformSplitTermsReader(PostingsReaderBase postingsReader, SegmentReadState state, BlockDecoder blockDecoder, boolean dictionaryOnHeap)
protected	UniformSplitTermsReader(PostingsReaderBase postingsReader, SegmentReadState state, BlockDecoder blockDecoder, boolean dictionaryOnHeap, FieldMetadata.Serializer fieldMetadataReader, String codecName, int versionStart, int versionCurrent, String termsBlocksExtension, String dictionaryExtension)

Method Summary

Modifier and Type	Method	Description
void	checkIntegrity()
void	close()
protected IndexDictionary.BrowserSupplier	createDictionaryBrowserSupplier(SegmentReadState state, IndexInput dictionaryInput, FieldMetadata fieldMetadata, BlockDecoder blockDecoder, boolean dictionaryOnHeap)
protected void	fillFieldMap(PostingsReaderBase postingsReader, SegmentReadState state, BlockDecoder blockDecoder, boolean dictionaryOnHeap, IndexInput dictionaryInput, IndexInput blockInput, Collection<FieldMetadata> fieldMetadataCollection, FieldInfos fieldInfos)
Iterator<String>	iterator()
protected Collection<FieldMetadata>	readEncodedFieldsMetadata(int numFields, DataInput metadataInput, BlockDecoder blockDecoder, FieldInfos fieldInfos, FieldMetadata.Serializer fieldMetadataReader, int maxNumDocs)
protected Collection<FieldMetadata>	readFieldsMetadata(IndexInput indexInput, BlockDecoder blockDecoder, FieldInfos fieldInfos, FieldMetadata.Serializer fieldMetadataReader, int maxNumDocs)
protected Collection<FieldMetadata>	readUnencodedFieldsMetadata(int numFields, DataInput metadataInput, FieldInfos fieldInfos, FieldMetadata.Serializer fieldMetadataReader, int maxNumDocs)
protected void	seekFieldsMetadata(IndexInput indexInput)	Positions the given IndexInput at the beginning of the fields metadata.
int	size()
Terms	terms(String field)

Methods inherited from class org.apache.lucene.codecs.FieldsProducer

getMergeInstance

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Details

postingsReader

protected final PostingsReaderBase postingsReader

version

protected final int version

blockInput

protected final IndexInput blockInput

dictionaryInput

protected final IndexInput dictionaryInput

fieldToTermsMap

protected final Map<String,UniformSplitTerms> fieldToTermsMap

sortedFieldNames

protected final Collection<String> sortedFieldNames

Constructor Details

UniformSplitTermsReader

public UniformSplitTermsReader(PostingsReaderBase postingsReader,
 SegmentReadState state,
 BlockDecoder blockDecoder,
 boolean dictionaryOnHeap)
                        throws IOException

Parameters:

blockDecoder - Optional block decoder, may be null if none. It can be used for decompression or decryption.

dictionaryOnHeap - Whether to force loading the terms dictionary on-heap. By default it is kept off-heap without impact on performance. If block encoding/decoding is used, then the dictionary is always loaded on-heap whatever this parameter value is.

Throws:

IOException

UniformSplitTermsReader

protected UniformSplitTermsReader(PostingsReaderBase postingsReader,
 SegmentReadState state,
 BlockDecoder blockDecoder,
 boolean dictionaryOnHeap,
 FieldMetadata.Serializer fieldMetadataReader,
 String codecName,
 int versionStart,
 int versionCurrent,
 String termsBlocksExtension,
 String dictionaryExtension)
                           throws IOException

Throws:

IOException

See Also:

• UniformSplitTermsReader(PostingsReaderBase, SegmentReadState, BlockDecoder, boolean)

Method Details

fillFieldMap

protected void fillFieldMap(PostingsReaderBase postingsReader,
 SegmentReadState state,
 BlockDecoder blockDecoder,
 boolean dictionaryOnHeap,
 IndexInput dictionaryInput,
 IndexInput blockInput,
 Collection<FieldMetadata> fieldMetadataCollection,
 FieldInfos fieldInfos)
                     throws IOException

Throws:

IOException

createDictionaryBrowserSupplier

protected IndexDictionary.BrowserSupplier createDictionaryBrowserSupplier(SegmentReadState state,
 IndexInput dictionaryInput,
 FieldMetadata fieldMetadata,
 BlockDecoder blockDecoder,
 boolean dictionaryOnHeap)
                                                                   throws IOException

Throws:

IOException

readFieldsMetadata

protected Collection<FieldMetadata> readFieldsMetadata(IndexInput indexInput,
 BlockDecoder blockDecoder,
 FieldInfos fieldInfos,
 FieldMetadata.Serializer fieldMetadataReader,
 int maxNumDocs)
                                                throws IOException

Parameters:

indexInput - IndexInput must be positioned to the fields metadata details by calling seekFieldsMetadata(IndexInput) before this call.

blockDecoder - Optional block decoder, may be null if none.

Throws:

IOException

readEncodedFieldsMetadata

protected Collection<FieldMetadata> readEncodedFieldsMetadata(int numFields,
 DataInput metadataInput,
 BlockDecoder blockDecoder,
 FieldInfos fieldInfos,
 FieldMetadata.Serializer fieldMetadataReader,
 int maxNumDocs)
                                                       throws IOException

Throws:

IOException

readUnencodedFieldsMetadata

protected Collection<FieldMetadata> readUnencodedFieldsMetadata(int numFields,
 DataInput metadataInput,
 FieldInfos fieldInfos,
 FieldMetadata.Serializer fieldMetadataReader,
 int maxNumDocs)
                                                         throws IOException

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in class FieldsProducer

Throws:

IOException

checkIntegrity

public void checkIntegrity()
                    throws IOException

Specified by:

checkIntegrity in class FieldsProducer

Throws:

IOException

iterator

public Iterator<String> iterator()

Specified by:

iterator in interface Iterable<String>

Specified by:

iterator in class Fields

terms

public Terms terms(String field)

Specified by:

terms in class Fields

size

public int size()

Specified by:

size in class Fields

seekFieldsMetadata

protected void seekFieldsMetadata(IndexInput indexInput)
                           throws IOException

Positions the given IndexInput at the beginning of the fields metadata.

Throws:

IOException