All Classes

Class	Description
AveragePayloadFunction	Calculate the final score as the average score of all payloads seen.
BoolDocValues	Abstract FunctionValues implementation which supports retrieving boolean values.
BoolFunction	Abstract parent class for those ValueSource implementations which apply boolean logic to their values
ByteKnnVectorFieldSource	An implementation for retrieving FunctionValues instances for byte knn vectors fields.
BytesRefFieldSource	An implementation for retrieving FunctionValues instances for string based fields.
ByteVectorSimilarityFunction	ByteVectorSimilarityFunction returns a similarity function between two knn vectors with byte elements.
CommonTermsQuery	A query that executes high-frequency terms in a optional sub-query to prevent slow queries due to "common" terms like stopwords.
ComparisonBoolFunction	Base class for comparison operators useful within an "if"/conditional.
ConstKnnByteVectorValueSource	Function that returns a constant byte vector value for every document.
ConstKnnFloatValueSource	Function that returns a constant float vector value for every document.
ConstNumberSource	ConstNumberSource is the base class for all constant numbers
ConstValueSource	ConstValueSource returns a constant for all documents
DefFunction	ValueSource implementation which only returns the values from the provided ValueSources which are available for a particular docId.
DivFloatFunction	Function to divide "a" by "b"
DocFreqValueSource	DocFreqValueSource returns the number of documents containing the term.
DocTermsIndexDocValues	Serves as base class for FunctionValues based on DocTermsIndex.
DocTermsIndexDocValues.DocTermsIndexException	Custom Exception to be thrown when the DocTermsIndex for a field cannot be generated
DoubleConstValueSource	Function that returns a constant double value for every document.
DoubleDocValues	Abstract FunctionValues implementation which supports retrieving double values.
DoubleFieldSource	Obtains double field values from LeafReader.getNumericDocValues(java.lang.String) and makes those values available as other numeric types, casting as needed.
DualFloatFunction	Abstract ValueSource implementation which wraps two ValueSources and applies an extendible float function to their values.
EnumFieldSource	Obtains int field values from LeafReader.getNumericDocValues(java.lang.String) and makes those values available as other numeric types, casting as needed.
FieldCacheSource	A base class for ValueSource implementations that retrieve values for a single field from DocValues.
FieldMaskingSpanQuery	Wrapper to allow SpanQuery objects participate in composite single-field SpanQueries by 'lying' about their search field.
FilteredIntervalsSource	An IntervalsSource that filters the intervals from another IntervalsSource
FilterSpans	A Spans implementation wrapping another spans instance, allowing to filter spans matches easily by implementing FilterSpans.accept(org.apache.lucene.queries.spans.Spans)
FilterSpans.AcceptStatus	Status returned from FilterSpans.accept(Spans) that indicates whether a candidate match should be accepted, rejected, or rejected and move on to the next document.
FloatDocValues	Abstract FunctionValues implementation which supports retrieving float values.
FloatFieldSource	Obtains float field values from LeafReader.getNumericDocValues(java.lang.String) and makes those values available as other numeric types, casting as needed.
FloatKnnVectorFieldSource	An implementation for retrieving FunctionValues instances for float knn vectors fields.
FloatVectorSimilarityFunction	FloatVectorSimilarityFunction returns a similarity function between two knn vectors with float elements.
FunctionMatchQuery	A query that retrieves all documents with a DoubleValues value matching a predicate
FunctionQuery	Returns a score for each document based on a ValueSource, often some function of the value of a field.
FunctionRangeQuery	A Query wrapping a ValueSource that matches docs in which the values in the value source match a configured range.
FunctionScoreQuery	A query that wraps another query, and uses a DoubleValuesSource to replace or modify the wrapped query's score
FunctionValues	Represents field values as different types.
FunctionValues.ValueFiller	Abstraction of the logic required to fill the value of a specified doc into a reusable MutableValue.
IDFValueSource	Function that returns #idf(long, long) for every document.
IfFunction	Depending on the boolean value of the ifSource function, returns the value of the trueSource or falseSource function.
IndexReaderFunctions	Class exposing static helper methods for generating DoubleValuesSource instances over some IndexReader statistics
IntDocValues	Abstract FunctionValues implementation which supports retrieving int values.
IntervalFilter	Wraps an IntervalIterator and passes through those intervals that match the IntervalFilter.accept() function
IntervalIterator	A DocIdSetIterator that also allows iteration over matching intervals in a document.
IntervalMatchesIterator	An extension of MatchesIterator that allows it to be treated as an IntervalIterator
IntervalQuery	A query that retrieves documents containing intervals returned from an IntervalsSource
Intervals	Factory functions for creating interval sources.
IntervalsSource	A helper class for IntervalQuery that provides an IntervalIterator for a given field and segment
IntFieldSource	Obtains int field values from LeafReader.getNumericDocValues(java.lang.String) and makes those values available as other numeric types, casting as needed.
JoinDocFreqValueSource	Use a field value and find the Document Frequency within another field.
LinearFloatFunction	LinearFloatFunction implements a linear function over another ValueSource.
LiteralValueSource	Pass a the field value through as a String, no matter the type // Q: doesn't this mean it's a "string"?
LongDocValues	Abstract FunctionValues implementation which supports retrieving long values.
LongFieldSource	Obtains long field values from LeafReader.getNumericDocValues(java.lang.String) and makes those values available as other numeric types, casting as needed.
MaxDocValueSource	Returns the value of IndexReader.maxDoc() for every document.
MaxFloatFunction	MaxFloatFunction returns the max of its components.
MaxPayloadFunction	Returns the maximum payload score seen, else 1 if there are no payloads on the doc.
MinFloatFunction	MinFloatFunction returns the min of its components.
MinPayloadFunction	Calculates the minimum payload seen
MoreLikeThis	Generate "more like this" similarity queries.
MoreLikeThisQuery	A simple wrapper for MoreLikeThis for use in scenarios where a Query object is required eg in custom QueryParser extensions.
MultiBoolFunction	Abstract ValueSource implementation which wraps multiple ValueSources and applies an extendible boolean function to their values.
MultiFloatFunction	Abstract ValueSource implementation which wraps multiple ValueSources and applies an extendible float function to their values.
MultiFunction	Abstract parent class for ValueSource implementations that wrap multiple ValueSources and apply their own logic.
MultiValuedDoubleFieldSource	Obtains double field values from LeafReader.getSortedNumericDocValues(java.lang.String) and using a SortedNumericSelector it gives a single-valued ValueSource view of a field.
MultiValuedFloatFieldSource	Obtains float field values from LeafReader.getSortedNumericDocValues(java.lang.String) and using a SortedNumericSelector it gives a single-valued ValueSource view of a field.
MultiValuedIntFieldSource	Obtains int field values from LeafReader.getSortedNumericDocValues(java.lang.String) and using a SortedNumericSelector it gives a single-valued ValueSource view of a field.
MultiValuedLongFieldSource	Obtains long field values from LeafReader.getSortedNumericDocValues(java.lang.String) and using a SortedNumericSelector it gives a single-valued ValueSource view of a field.
MultiValueSource	A ValueSource that abstractly represents ValueSources for poly fields, and other things.
NearSpansOrdered	A Spans that is formed from the ordered subspans of a SpanNearQuery where the subspans do not overlap and have a maximum slop between them.
NearSpansUnordered	Similar to NearSpansOrdered, but for the unordered case.
NormValueSource	Function that returns the decoded norm for every document.
NumDocsValueSource	Returns the value of IndexReader.numDocs() for every document.
PayloadDecoder	Defines a way of converting payloads to float values, for use by PayloadScoreQuery
PayloadFunction	An abstract class that defines a way for PayloadScoreQuery instances to transform the cumulative effects of payload scores for a document.
PayloadMatcher	Defines an interface for testing if two payloads should be consider to match
PayloadMatcherFactory	Creates a payload matcher object based on a payload type and an operation.
PayloadScoreQuery	A Query class that uses a PayloadFunction to modify the score of a wrapped SpanQuery
PowFloatFunction	Function to raise the base "a" to the power "b"
ProductFloatFunction	ProductFloatFunction returns the product of its components.
QueryValueSource	QueryValueSource returns the relevance score of the query
RangeMapFloatFunction	RangeMapFloatFunction implements a map function over another ValueSource whose values fall within min and max inclusive to target.
ReciprocalFloatFunction	ReciprocalFloatFunction implements a reciprocal function f(x) = a/(mx+b), based on the float value of a field or function as exported by ValueSource.
ScaleFloatFunction	Scales values to be between min and max.
SimpleBoolFunction	BoolFunction implementation which applies an extendible boolean function to the values of a single wrapped ValueSource.
SimpleFloatFunction	A simple float function with a single argument
SingleFunction	A function with a single argument
SortedSetFieldSource	Retrieves FunctionValues instances for multi-valued string based fields.
SpanCollector	An interface defining the collection of postings information from the leaves of a Spans
SpanContainingQuery	Keep matches that contain another SpanScorer.
SpanDisiWrapper	Wrapper used in SpanDisiPriorityQueue.
SpanFirstQuery	Matches spans near the beginning of a field.
SpanMultiTermQueryWrapper<Q extends MultiTermQuery>	Wraps any MultiTermQuery as a SpanQuery, so it can be nested within other SpanQuery classes.
SpanMultiTermQueryWrapper.SpanRewriteMethod	Abstract class that defines how the query is rewritten.
SpanMultiTermQueryWrapper.TopTermsSpanBooleanQueryRewrite	A rewrite method that first translates each term into a SpanTermQuery in a BooleanClause.Occur.SHOULD clause in a BooleanQuery, and keeps the scores as computed by the query.
SpanNearQuery	Matches spans which are near one another.
SpanNearQuery.Builder	A builder for SpanNearQueries
SpanNotQuery	Removes matches which overlap with another SpanQuery or which are within x tokens before or y tokens after another SpanQuery.
SpanOrQuery	Matches the union of its clauses.
SpanPayloadCheckQuery	Only return those matches that have a specific payload at the given position.
SpanPayloadCheckQuery.MatchOperation	The payload type.
SpanPayloadCheckQuery.PayloadType	The payload type.
SpanPositionCheckQuery	Base class for filtering a SpanQuery based on the position of a match.
SpanPositionRangeQuery	Checks to see if the SpanPositionCheckQuery.getMatch() lies between a start and end position
SpanQuery	Base class for span-based queries.
Spans	Iterates through combinations of start/end positions per-doc.
SpanScorer	A basic Scorer over Spans.
SpanTermQuery	Matches spans containing a term.
SpanWeight	Expert-only.
SpanWeight.Postings	Enumeration defining what postings information should be retrieved from the index for a given Spans
SpanWithinQuery	Keep matches that are contained within another Spans.
StrDocValues	Abstract FunctionValues implementation which supports retrieving String values.
SumFloatFunction	SumFloatFunction returns the sum of its components.
SumPayloadFunction	Calculate the final score as the sum of scores of all payloads seen.
SumTotalTermFreqValueSource	SumTotalTermFreqValueSource returns the number of tokens.
TermFreqValueSource	Function that returns PostingsEnum.freq() for the supplied term in every document.
TermSpans	Expert: Public for extension only.
TFValueSource	Function that returns TFIDFSimilarity.tf(float) for every document.
TotalTermFreqValueSource	TotalTermFreqValueSource returns the total term freq (sum of term freqs across all documents).
ValueSource	Instantiates FunctionValues for a particular reader.
ValueSourceScorer	Scorer which returns the result of FunctionValues.floatVal(int) as the score for a document, and which filters out documents that don't match ValueSourceScorer.matches(int).
VectorFieldFunction	An implementation for retrieving FunctionValues instances for knn vectors fields.
VectorSimilarityFunction	VectorSimilarityFunction returns a similarity function between two knn vectors.
VectorValueSource	Converts individual ValueSource instances to leverage the FunctionValues *Val functions that work with multiple values, i.e.