Package org.apache.lucene.index

Class ExitableDirectoryReader.ExitableFilterAtomicReader

java.lang.Object

org.apache.lucene.index.IndexReader

org.apache.lucene.index.LeafReader

org.apache.lucene.index.FilterLeafReader

org.apache.lucene.index.ExitableDirectoryReader.ExitableFilterAtomicReader

All Implemented Interfaces:

Closeable, AutoCloseable

Enclosing class:

ExitableDirectoryReader

public static class ExitableDirectoryReader.ExitableFilterAtomicReader
extends FilterLeafReader

Wrapper class for another FilterAtomicReader. This is used by ExitableSubReaderWrapper.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.index.FilterLeafReader

FilterLeafReader.FilterFields, FilterLeafReader.FilterPostingsEnum, FilterLeafReader.FilterTerms, FilterLeafReader.FilterTermsEnum

Nested classes/interfaces inherited from class org.apache.lucene.index.IndexReader

IndexReader.CacheHelper, IndexReader.CacheKey, IndexReader.ClosedListener

Field Summary

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

in

Constructor Summary

Constructors

Constructor	Description
ExitableFilterAtomicReader(LeafReader in, QueryTimeout queryTimeout)	Constructor *

Method Summary

Modifier and Type	Method	Description
BinaryDocValues	getBinaryDocValues(String field)	Returns BinaryDocValues for this field, or null if no binary doc values were indexed for this field.
IndexReader.CacheHelper	getCoreCacheHelper()	Optional method: Return a IndexReader.CacheHelper that can be used to cache based on the content of this leaf regardless of deletions.
NumericDocValues	getNumericDocValues(String field)	Returns NumericDocValues for this field, or null if no numeric doc values were indexed for this field.
PointValues	getPointValues(String field)	Returns the PointValues used for numeric or spatial searches for the given field, or null if there are no point fields.
IndexReader.CacheHelper	getReaderCacheHelper()	Optional method: Return a IndexReader.CacheHelper that can be used to cache based on the content of this reader.
SortedDocValues	getSortedDocValues(String field)	Returns SortedDocValues for this field, or null if no SortedDocValues were indexed for this field.
SortedNumericDocValues	getSortedNumericDocValues(String field)	Returns SortedNumericDocValues for this field, or null if no SortedNumericDocValues were indexed for this field.
SortedSetDocValues	getSortedSetDocValues(String field)	Returns SortedSetDocValues for this field, or null if no SortedSetDocValues were indexed for this field.
VectorValues	getVectorValues(String field)	Returns VectorValues for this field, or null if no VectorValues were indexed.
TopDocs	searchNearestVectors(String field, float[] target, int k, Bits acceptDocs, int visitedLimit)	Return the k nearest neighbor documents as determined by comparison of their vector values for this field, to the given vector, by the field's similarity function.
Terms	terms(String field)	Returns the Terms index for this field, or null if it has none.

Methods inherited from class org.apache.lucene.index.FilterLeafReader

checkIntegrity, doClose, document, getDelegate, getFieldInfos, getLiveDocs, getMetaData, getNormValues, getTermVectors, maxDoc, numDocs, toString, unwrap

Methods inherited from class org.apache.lucene.index.LeafReader

docFreq, getContext, getDocCount, getSumDocFreq, getSumTotalTermFreq, postings, postings, totalTermFreq

Methods inherited from class org.apache.lucene.index.IndexReader

close, decRef, document, document, ensureOpen, equals, getRefCount, getTermVector, hasDeletions, hashCode, incRef, leaves, notifyReaderClosedListeners, numDeletedDocs, registerParentReader, tryIncRef

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ExitableFilterAtomicReader

public ExitableFilterAtomicReader(LeafReader in,
                                  QueryTimeout queryTimeout)

Constructor *

Method Detail

getPointValues

public PointValues getPointValues(String field)
                           throws IOException

Description copied from class: LeafReader

Returns the PointValues used for numeric or spatial searches for the given field, or null if there are no point fields.

Overrides:

getPointValues in class FilterLeafReader

Throws:

IOException

terms

public Terms terms(String field)
            throws IOException

Description copied from class: LeafReader

Returns the Terms index for this field, or null if it has none.

Overrides:

terms in class FilterLeafReader

Throws:

IOException

getReaderCacheHelper

public IndexReader.CacheHelper getReaderCacheHelper()

Description copied from class: IndexReader

Optional method: Return a IndexReader.CacheHelper that can be used to cache based on the content of this reader. Two readers that have different data or different sets of deleted documents will be considered different.

A return value of null indicates that this reader is not suited for caching, which is typically the case for short-lived wrappers that alter the content of the wrapped reader.

Specified by:

getReaderCacheHelper in class IndexReader

getCoreCacheHelper

public IndexReader.CacheHelper getCoreCacheHelper()

Description copied from class: LeafReader

Optional method: Return a IndexReader.CacheHelper that can be used to cache based on the content of this leaf regardless of deletions. Two readers that have the same data but different sets of deleted documents or doc values updates may be considered equal. Consider using IndexReader.getReaderCacheHelper() if you need deletions or dv updates to be taken into account.

A return value of null indicates that this reader is not suited for caching, which is typically the case for short-lived wrappers that alter the content of the wrapped leaf reader.

Specified by:

getCoreCacheHelper in class LeafReader

getNumericDocValues

public NumericDocValues getNumericDocValues(String field)
                                     throws IOException

Description copied from class: LeafReader

Returns NumericDocValues for this field, or null if no numeric doc values were indexed for this field. The returned instance should only be used by a single thread.

Overrides:

getNumericDocValues in class FilterLeafReader

Throws:

IOException

getBinaryDocValues

public BinaryDocValues getBinaryDocValues(String field)
                                   throws IOException

Description copied from class: LeafReader

Returns BinaryDocValues for this field, or null if no binary doc values were indexed for this field. The returned instance should only be used by a single thread.

Overrides:

getBinaryDocValues in class FilterLeafReader

Throws:

IOException

getSortedDocValues

public SortedDocValues getSortedDocValues(String field)
                                   throws IOException

Description copied from class: LeafReader

Returns SortedDocValues for this field, or null if no SortedDocValues were indexed for this field. The returned instance should only be used by a single thread.

Overrides:

getSortedDocValues in class FilterLeafReader

Throws:

IOException

getSortedNumericDocValues

public SortedNumericDocValues getSortedNumericDocValues(String field)
                                                 throws IOException

Description copied from class: LeafReader

Returns SortedNumericDocValues for this field, or null if no SortedNumericDocValues were indexed for this field. The returned instance should only be used by a single thread.

Overrides:

getSortedNumericDocValues in class FilterLeafReader

Throws:

IOException

getSortedSetDocValues

public SortedSetDocValues getSortedSetDocValues(String field)
                                         throws IOException

Description copied from class: LeafReader

Returns SortedSetDocValues for this field, or null if no SortedSetDocValues were indexed for this field. The returned instance should only be used by a single thread.

Overrides:

getSortedSetDocValues in class FilterLeafReader

Throws:

IOException

getVectorValues

public VectorValues getVectorValues(String field)
                             throws IOException

Description copied from class: LeafReader

Returns VectorValues for this field, or null if no VectorValues were indexed. The returned instance should only be used by a single thread.

Overrides:

getVectorValues in class FilterLeafReader

Throws:

IOException

searchNearestVectors

public TopDocs searchNearestVectors(String field,
                                    float[] target,
                                    int k,
                                    Bits acceptDocs,
                                    int visitedLimit)
                             throws IOException

Description copied from class: LeafReader

Return the k nearest neighbor documents as determined by comparison of their vector values for this field, to the given vector, by the field's similarity function. The score of each document is derived from the vector similarity in a way that ensures scores are positive and that a larger score corresponds to a higher ranking.

The search is allowed to be approximate, meaning the results are not guaranteed to be the true k closest neighbors. For large values of k (for example when k is close to the total number of documents), the search may also retrieve fewer than k documents.

The returned TopDocs will contain a ScoreDoc for each nearest neighbor, sorted in order of their similarity to the query vector (decreasing scores). The TotalHits contains the number of documents visited during the search. If the search stopped early because it hit visitedLimit, it is indicated through the relation TotalHits.Relation.GREATER_THAN_OR_EQUAL_TO.

Overrides:

searchNearestVectors in class FilterLeafReader

Parameters:

field - the vector field to search

target - the vector-valued query

k - the number of docs to return

acceptDocs - Bits that represents the allowed documents to match, or null if they are all allowed to match.

visitedLimit - the maximum number of nodes that the search is allowed to visit

Returns:

the k nearest neighbor documents, along with their (searchStrategy-specific) scores.

Throws:

IOException